Download Laser Driver for Projectors MAX3600

19-4720; Rev 2; 8/10
Laser Driver for Projectors
The MAX3600B/R/G are monochrome drivers for blue,
red, and green lasers. The MAX3600A guarantees
higher full-scale output currents than the MAX3600, and
is recommended for new designs.
Features
S Integrates Four Current-Output Laser Drivers
S Compatible with Red, Blue, and Green Lasers
S 10-Bit Video DACs, fCLK = 1MHz to 160MHz
S 8-Bit Gain and Offset DACs
S 2ns Output Switching Time
S Serial Port Control
S Laser Enable
S Random-Noise Generator and Periodic Off
S 5mm x 5mm, 40-Pin TQFN Package (0.4mm Pitch)
Applications
Ordering Information
RGB Pico Laser Projector
PART
TEMP RANGE
PIN-PACKAGE
Up to WXGA and 1080p Resolution Projectors
MAX3600CTL+†
0NC to +70NC
40 TQFN-EP*
Monochrome Blue, Green, or Red Pico Laser
Projector
MAX3600ACTL+
0NC to +70NC
40 TQFN-EP*
MAX3600RCTL+††
0NC to +70NC
40 TQFN-EP*
MAX3600GCTL+††
0NC to +70NC
40 TQFN-EP*
MAX3600BCTL+††
0NC to +70NC
40 TQFN-EP*
Typical Operating Circuits and Pin Configuration appear at
end of data sheet.
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
†Not recommended for new designs.
††Future product—contact factory for availability.
Simplified Functional Diagram
10-BIT VIDEO
3-WIRE BUS
OUTPUT ENABLE
SYNC
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
CLK
PO
REF
CS
SDA
SCL
VM
EN_MAIN
VA1
VA2
VA3
VA4
VIDEO DEMULTIPLEXER
VIDEO1
OUTPUT 1
+VRED
+VGREEN
+VBLUE
+VNOISE
OUT1
RED LASER
VIDEO2
PERIODIC OFF
PRBS NOISE
GENERATOR
VIDEO3
OUTPUT 2
OUT2
GREEN LASER
OUTPUT 4
OUTPUT 3
OUT4
OUT3
NOISE DIODE
BLUE LASER
VCCA
SERIAL PORT
VCCD
MAX3600
MAX3600A
CONTROL LOGIC
+VCC
VEE_T, VEE
EP
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
MAX3600
General Description
The MAX3600 laser driver for projectors supports video
imaging with red, blue, and green lasers. Each output
includes a 10-bit video digital-to-analog converter (DAC)
with programmable gain and offset. For operation with
synthetic green lasers, the driver includes a periodic off
function and a fourth output with a random-noise generator.
MAX3600
Laser Driver for Projectors
ABSOLUTE MAXIMUM RATINGS
Supply Voltage Range, VCCA, VCCD....................-0.3V to +4.0V
Voltage Range at VA1, VA2, VA4...........................-0.3V to +6.0V
Voltage Range at VA3...........................................-0.3V to +8.5V
Voltage Range at OUT1............................ -0.3V to (VA1 + 0.3V)
Voltage Range at OUT2............................ -0.3V to (VA2 + 0.3V)
Voltage Range at OUT3............................ -0.3V to (VA3 + 0.3V)
Voltage Range at OUT4............................ -0.3V to (VA4 + 0.3V)
Voltage Range (VA1 - VOUT1), (VA2 - VOUT2),
(VA4 - VOUT4) .......................................................... 0 to +6.0V
Voltage Range (VA3 - VOUT3)..................................... 0 to +7.5V
Voltage Range at D0 to D9, SYNC, CLK, PO, SCL, SDA,
CS, EN_MAIN, VM, REF, VEE_T, RES... -0.3V to (VCC + 0.3V)
Current at OUT1, OUT2, OUT3, OUT4.....................See Table 3
Current at D0 to D9, SYNC, CLK, PO, SCL, SDA,
CS, EN_MAIN, VM, REF, VEE_T, RES.......................... Q50mA
Current at REF................................................................. Q0.5mA
Continuous Power Dissipation (TA = +70NC)
40-Pin TQFN (derate 35.7mW/NC above +70NC)........2857mW
Storage Temperature Range............................. -40NC to +150NC
Lead Temperature (soldering, 10s).................................+300NC
Soldering Temperature (reflow).......................................+260NC
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VCC = 3.3V Q5%, TA = 0NC to +70NC, TJ P +125NC, EN_MAIN high, VC_ R 0.9V, unless otherwise noted.) (Note 1, Equation 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
100
160
MAX
UNITS
VIDEO DAC (10 BITS)
Maximum Conversion Rate
Msps
Settling Time
(Note 2)
4
Rise/Fall Time (20% to 80%)
(Note 2)
1
(4)
> 3.1
6.0
OUT3 enabled
> 4.0
8.5
OUT3 disabled
> 3.1
8.5
Analog Supply Voltage
VA1, VA2,
VA4
VA3
Compliance Voltage
Analog Supply Current
(IVA - IOUT) (Note 3, Figure 8)
VC_
IDAC_G0
VC_ = VA_ - VOUT_
CLK static
ns
0.5
(6.0)
OUT1
18
31
OUT2
18
34
OUT3
19
26
OUT4
15
23
IDAC_G1
ns
V
V
mA
3
IDAC_G2
(30)
80
OUT1
(6)
12
(18)
OUT2
(15)
40
(60)
OUT3
(3.5)
10
(15)
GAIN DAC (8 BITS): VIDEO_ = 3FFh
Minimum Full-Scale Current
(gs_ = 00h)
Maximum Full-Scale Current:
MAX3600
(gs_ = FFh)
Maximum Full-Scale Current:
MAX3600A/R/G/B
(gs_ = FFh)
2
GLOW
GHIGH +
GLOW
GHIGH +
GLOW
OUT4
(3)
10
(25)
OUT1
175
227
(270)
OUT2
550
690
(850)
OUT3
140
170
(200)
OUT4
140
185
(230)
OUT1
210
280
(330)
OUT2
630
760
(955)
OUT3
140
170
(210)
OUT4
140
185
(300)
mA
mA
mA
Laser Driver for Projectors
MAX3600
ELECTRICAL CHARACTERISTICS (continued)
(VCC = 3.3V Q5%, TA = 0NC to +70NC, TJ P +125NC, EN_MAIN high, VC_ R 0.9V, unless otherwise noted.) (Note 1, Equation 1)
PARAMETER
Settling Time
SYMBOL
tSG
CONDITIONS
MIN
To 5% of final value
TYP
MAX
UNITS
10
(50)
Fs
83
(110)
OFFSET DAC (8 BITS): VIDEO_ = 00h, gs_ = 00h
OUT1
Maximum Offset:
MAX3600/A/R/G/B
OSHIGH
Offset Error
OSLOW
Offset Settling Time
tSO
60
OUT2, OUT3
65
83
(110)
OUT4
120
155
(200)
VOUT1, VOUT2, VOUT4 = 1.6V;
VOUT3 = 2.5V
-25
+0.2
+25
FA
10
(50)
Fs
To 5% of final value
mA
LOGIC I/O: SDA, SCL, CS, VM, EN_MAIN
Input High Voltage
VIH1
Operating condition
VCC 0.3
VCC +
0.3
V
Input Low Voltage
VIL1
Operating condition
-0.3
+0.3
V
SDA (write), SCL, CS
VM to VCCD
-10
Q0.2
+10
FA
25
60
100
EN_MAIN to VEE
25
60
100
Input Current
Input Resistance
Input Capacitance
(1)
SCL, CS, SDA, VM, EN_MAIN
Input Hysteresis
100
From serial port load
Enable/Disable Time
Disable Time
tDIS
Sink Current at SDA
pF
mV
< 10
VMh to final value
< 0.25
EN_MAINh to final value
< 0.25
0.01
EN_MAINi to IOUTi
Read mode, VSDA = 0.6V
kI
10
16
(140)
> 160
Fs
(1)
Fs
mA
VIDEO DATA INPUTS: D0 TO D9, CLK, SYNC, PO
Minimum Frequency
fCLK_MIN
Maximum Frequency
fCLK_MAX
Clock Duty Cycle
0.01
(1)
MHz
MHz
DDR clock, operating condition
(45)
(55)
Standard clock, operating condition
(42)
(58)
%
Setup Time
tSU
Operating condition
(0.8)
ns
Hold Time
tH
Operating condition
(0.8)
ns
Input Switching Time
Operating condition (10% to 90%)
Input Voltage Range
VIN
Input High Threshold
VIH2
-0.3
Input Low Threshold
VIL2
Relative to VREF
Relative to VREF
Reference Voltage
VREF
Operating condition
Data Input Capacitance
CD
Termination Resistors
RTT
Figure 6
REF Input Current
IREF
VREF = VCC/2
Propagation Delay
1.5
-170
0.83
ns
VCC +
0.3
V
+170
mV
mV
VCC/2
0.4
D0:D9 to OUT_, pixel clocks
V
pF
450
900
1500
I
-5
-1.2
+5
FA
3
3
MAX3600
Laser Driver for Projectors
ELECTRICAL CHARACTERISTICS (continued)
(VCC = 3.3V Q5%, TA = 0NC to +70NC, TJ P +125NC, EN_MAIN high, VC_ R 0.9V, unless otherwise noted.) (Note 1, Equation 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
(102)
MHz
(1040)
kHz
(150)
MHz
PO GENERATOR
Pixel Clock Range for PO
Operating condition
Minimum PO Pulse Width
Four subpixels
PLL Bandwidth
24
3.5
(560)
800
ns
PRBS OSCILLATOR
PRBS Oscillator Frequency
fPRBS1
SERIAL PORT: SDA, SCL, CS (Figure 14)
Maximum Clock Frequency
fSCL
Input Edge Time
fPIXEL = 24MHz to 102MHz
(100)
Write mode
(25)
20% to 80%
tL
MHz
5
ns
(4)
ns
CS Leading Time
SCL Pulse-Width High
tCH
SCL Pulse-Width Low
tCL
SCL to SDA Propagation Delay
tD
(10)
ns
Data In Setup Time
tDS
(10)
ns
Data In Hold Time
tDH
(10)
ns
tT
(10)
ns
CS Trailing Time
POWER SUPPLY: VCCA, VCCD
Supply Current
(IVCCA + IVCCD, gs_ = 80h,
os_ = 80h, fCLK = 75MHz)
20
ns
20
ns
IVCC1
VIDEO_ = 1F0h, CLK_SEL = 0,
output disabled
62
80
IVCC2
CLK_SEL = 1, VIDEO_: 0 n 3FFh
repeating
65
90
Output disabled
60
(70)
IVCC2_ENLO
mA
POWER-ON RESET (Figure 15)
VCC for Chip Enabled
Power-On Reset Parameters
IC Power-Up Time
VPOR1+
2.9
VPOR2+
Voltage for output on
VCC 0.8
VPOR2-
Voltage for output off
VCC 0.9
VPOR3+
Voltage for output on
3.3
VPOR3-
Voltage for output off
V
V
3.2
200
Fs
Note 1: Parameters in parentheses ( ) are provided for guidance, but are not tested or guaranteed.
Note 2: Figure 1 shows the AC test circuit. Settling time is defined from the 50% point of a transition to the greater of Q5% of
IFINAL or Q1% of ISWITCH. Control register gs_ ≥ 34. See Figure 18.
Note 3:IDAC ≈ G0 + IDAC_G1 x VD + IOUT/IDAC_G2, where VD is the average video bit density (Dbits/ns) as shown in Table 1.
4
Laser Driver for Projectors
PIXEL
TIME (ns)
VIDEO CODE
DBITS
0
0
1111111111
—
—
1
10
0000000000
10
1.0
2
20
0111111111
9
0.9
3
30
1000000000
10
1.0
4
40
1000000001
1
0.1
RC
MAX3600
Table 1. Example Calculation of Video Bit Density
VD
CC
4Ω
VCC
VCCA
VCCD
ICC
OUT1
PROBE
IA
VA1
VA2
VA3
VA4
DATA
SOURCE
VA1
VA2
VA3
VA4
RC
VL1
CC
2Ω
OUT2
D0
MAX3600
D1
MAX3600A
D2
D3
D4
D5
OUT3
D6
D7
D8
D9
CLK
SYNC
VM
OUT4
PO
SDA
SCL
EP
CS
VEE
VEE_T
EN_MAIN
PROBE
RC
VL2
CC
20Ω
PROBE
RC
VL3
CC
VL1 = 2.2V, VL2 = 1.2V,
VL3 = 3.5V, VL4 = 1.6V
3Ω
PROBE
VL4
Figure 1. Test Circuit
5
Typical Operating Characteristics
(VCC = 3.3V, TA = +25NC, EN_MAIN high, unless otherwise noted. VC_ = VA_ - VOUT_.)
1.2
0.6
0.4
0.2
0.4
0.2
LSB
0.8
0
0
-0.2
-0.4
-0.2
-0.4
-0.8
-0.4
-0.6
-1.2
-0.6
-0.8
-1.6
-0.8
-1.0
-2.0
400
600
800
1000
0
200
400
600
800
-1.0
1000
0
800
VIDEO DNL OUT1
(gs1 = 20h, TA = -40°C)
VIDEO DNL OUT2
(gs2 = 20h, TA = -40°C)
VIDEO DNL OUT3
(gs3 = 20h, TA = -40°C)
1.6
1.2
1.0
0.8
0.6
0.4
0.2
0.4
0.2
LSB
0.8
LSB
0.4
0
0
0
-0.2
-0.4
-0.2
-0.4
-0.8
-0.4
-0.6
-1.2
-0.6
-0.8
-1.6
-0.8
-1.0
-2.0
400
600
800
0
1000
200
600
800
-1.0
1000
0
VIDEO INL OUT1
gs2 = 20h, TA = -40NC
0
-10
gs2 = FFh, TJ = +125NC, VC_ = 0.9V
-20
gs3 = FFh, TJ = +125NC, VC_ = 0.9V
-20
-30
-30
-30
-40
-40
-40
-50
-50
-50
400
600
VIDEO CODE
800
1000
1000
gs3 = 20h, TA = -40NC
0
LSB
gs1 = FFh, TJ = +125NC, VC_ = 0.9V
800
10
-10
LSB
-10
600
VIDEO INL OUT3
10
MAX3600 toc07
gs1 = 20h, TA = -40NC
400
VIDEO CODE
VIDEO INL OUT2
10
200
200
VIDEO CODE
VIDEO CODE
0
400
MAX3600 toc08
200
1000
MAX3600 toc06
2.0
MAX3600 toc04
0.6
0
600
VIDEO CODE
0.8
-20
400
VIDEO CODE
1.0
0
200
VIDEO CODE
MAX3600 toc09
200
MAX3600 toc05
0
6
0.8
0.4
0
MAX3600 toc03
1.6
LSB
LSB
0.6
1.0
MAX3600 toc02
0.8
LSB
2.0
MAX3600 toc01
1.0
VIDEO DNL OUT3
(gs3 = FFh, TJ = +125°C, VC_ = 0.9V)
VIDEO DNL OUT2
(gs2 = FFh, TJ = +125°C, VC_ = 0.9V)
VIDEO DNL OUT1
(gs1 = FFh, TJ = +125°C, VC_ = 0.9V)
LSB
MAX3600
Laser Driver for Projectors
0
200
400
600
VIDEO CODE
800
1000
0
200
400
600
VIDEO CODE
800
1000
Laser Driver for Projectors
gs4 = FFh
2.0
MAX3600 toc11
MAX3600 toc10
90
70
MAX3600 toc12
GAIN DNL
VIDEO INL OUT4
VIDEO DNL OUT4
28
VIDEO_ = 3FFh
1.2
OUT1, OUT2, OUT3, OUT4
18
50
LSB
LSB
LSB
0.4
gs4 = FFh, TJ = +125°C, VC_ = 0.9V
30
-0.4
10
-1.2
8
gs4 = 20h, TA = -40°C
400
600
800
1000
200
0
400
VIDEO CODE
800
-2.0
1000
40
0
80
VIDEO CODE
GAIN INL
VIDEO_ = 3FFh
6
120
10
gs_ = 00h, VIDEO_ = 00h
gs_ = 00h, VIDEO_ = 00h
OUT1, OUT2, OUT3, OUT4
OUT2, OUT3, OUT4
LSB
2
LSB
LSB
OUT2, OUT3
OUT1
-6
OUT4
-10
-0.4
-2
-1.2
-6
-2.0
80
120
160
200
240
80
GAIN CODE
OUT2 PO PULSE
(fCLK = 50MHz)
120
160
200
240
80
TRANSFER FROM VCC TO IOUT
MAX3600 toc16
20
gs_ = 80h, os_ = 40h, VIDEO_ = 1FFh
T = DIOUT/IOUT x 100%/DVCC (%/V)
T (%/V)
9
7
6
OUT2
6
OUT4
4
240
gs_ = FFh, os_ = 0, VIDEO_ = 3FFh
T = DIOUT/IOUT x 100%/DVA_ (%/V)
5
OUT4
4
3
OUT1
OUT1
2
OUT3
2
200
8
12
8
160
TRANSFER FROM VA TO IOUT
10
14
10
120
OFFSET CODE
16
OUT2
OUT3
1
0
0
100
10ns/div
40
0
OFFSET CODE
18
250mA/div
OUT1
-10
40
0
T (%/V)
40
MAX3600 toc17
0
240
6
0.4
-2
200
OFFSET INL
1.2
2
160
GAIN CODE
OFFSET DNL
2.0
MAX3600 toc13
10
600
MAX3600 toc14
200
MAX3600 toc15
-10
0
MAX3600 toc18
-2
1k
10k
100k
VCC FREQUENCY (Hz)
1M
10M
100
1k
10k
100k
1M
VA FREQUENCY (Hz)
7
MAX3600
Typical Operating Characteristics (continued)
(VCC = 3.3V, TA = +25NC, EN_MAIN high, unless otherwise noted. VC_ = VA_ - VOUT_.)
Typical Operating Characteristics (continued)
(VCC = 3.3V, TA = +25NC, EN_MAIN high, unless otherwise noted. VC_ = VA_ - VOUT_.)
100
OUT2
5
RISE TIME (ns)
OUT3
OUT4
90
85
80
OUT1
75
VIDEO IS SQUARE WAVE: 3FFh (HIGH), 0 (LOW)
70
0
0.3
0.6
0.9
1.2
4
3
OUT4
OUT3
1
0.7
0.5
1.5
OUT2
OUT1
0.9
1.1
OUT4
3
1
OUT1
1.3
0.6
0.4
1.5
0.8
gs_ = 40h, os_ = FFh
5
3
OUT3
OUT2
2
OUTPUT FALL TIME
vs. COMPLIANCE VOLTAGE (VA_ - VOUT_)
3.0
gs_ = FFh, os_ = 0
2.5
FALL TIME (ns)
4
1.0
VC_ (V)
MAX3600 toc22
6
OUT2
OUT3
0
VC_ (V)
OUTPUT FALL TIME
vs. COMPLIANCE VOLTAGE (VA_ - VOUT_)
FALL TIME (ns)
4
2
0
gs_ = FFh, os_ = 0
5
2
VC_ (V)
2.0
OUT2
OUT3
1.5
1.0
0.5
1
OUT1
OUT4
0
0.5
0.7
0.9
1.1
VC_ (V)
8
6
MAX3600 toc23
95
gs_ = 40h, os_ = FFh
RISE TIME (ns)
gs_ = FFh, os_ = 0
OUTPUT RISE TIME
vs. COMPLIANCE VOLTAGE (VA_ - VOUT_)
MAX3600 toc20
6
MAX3600 toc19
105
OUTPUT RISE TIME
vs. COMPLIANCE VOLTAGE (VA_ - VOUT_)
MAX3600 toc21
NORMALIZED OUTPUT CURRENT
vs. COMPLIANCE VOLTAGE (VA_ - VOUT_)
NORMALIZED AMPLITUDE (%)
MAX3600
Laser Driver for Projectors
1.3
1.5
OUT4
OUT1
0
0.4
0.6
0.8
1.0
VC_ (V)
1.2
1.4
1.6
1.2
1.4
1.6
Laser Driver for Projectors
PIN
NAME
1
D0
2
D1
3
D2
4
D3
5
D4
6
D5
7
D6
8
D7
9
D8
MAX3600
Pin Description
FUNCTION
Synchronous Video Data Inputs. D0 is the LSB; D9 is the MSB.
10
D9
11
SYNC
12
CLK
Video Clock Input
13
RES
Reserved for Future Use. Leave open.
14
OUT3
15
VA3
Blue Laser Supply Voltage
16, 24, 32
VEE
Ground Connections. Connect to 0V.
17
SDA
Data I/O for Serial Port
18
Active-Low Chip Select
19
CS
SCL
20
EN_MAIN
21
VEE_T
22
VA4
23
OUT4
Pixel Clock Input in Configuration 1. See the Typical Operating Circuits.
Connect to Blue Laser Anode. If unused leave open. Available on the MAX3600/A/B only.
Clock Input for Serial Port
Laser Enable Input. When low, laser current is reduced (3.3V CMOS input with 60kI resistor to VEE).
Test. Connect to VEE for normal operation.
Noise Diode Supply Voltage
Connect to Noise Diode Anode. If unused, leave open. Available on the MAX3600/A/G only.
25, 27, 29
VA2
26, 28, 30
OUT2
Green Laser Supply Voltage
31
N.C.
No Connection. There is no connection from the package to the IC.
33
VM
34
VCCA
Video Marker Input. 3.3V CMOS input with 60kI pullup to VCCD.
3.3V Analog Supply. Connect directly to VCCD.
Connect to Green Laser Anode. If unused, leave open. Available on the MAX3600/A/G only.
35, 37
VA1
36
OUT1
Red Laser Supply Voltage
Connect to Red Laser Anode. If unused, leave open. Available on the MAX3600/A/R only.
38
VCCD
39
REF
3.3V Digital Supply. Connect directly to VCCA.
Reference Threshold Voltage for Synchronous Inputs
40
PO
Periodic Off Video Data Input. If the periodic off feature is not used, connect the PO pin to ground
through a resistor. For periodic off on every pixel, connect PO to VCC through a resistor. (RPO ≈
2.2kI is suitable for all configurations. The resistor is optional, but reduces power.)
—
EP
Exposed Pad. The exposed pad must be connected to VEE.
9
MAX3600
Laser Driver for Projectors
Detailed Description
OUTPUT1, OUTPUT2, and OUTPUT3 support operation with red, green, and blue lasers. OUTPUT4 and
the PRBS generator provide noise as required for certain synthetic green lasers. The MAX3600R (Figure 3),
MAX3600G (Figure 4), and MAX3600B (Figure 5) are
monochrome laser drivers.
The laser driver for projectors supports video imaging
with red, blue, and green lasers. Each output includes
a 10-bit video DAC with programmable gain and offset.
VIDEO
BUFFERS
REF
CONTROL LOGIC
VIDEO
DEMULTIPLEXER
VIDEO1
D0
0
1
D1
VSEL1
D2
D3
10
D4
D0:D9
MAX3600
MAX3600A
VIDEO2
D5
D7
os2
gs2
EN2
D8
PERIODIC_OFF
D6
D9
VIDEO
OFFSET
GAIN
EN
os1
gs1
EN1
fPIXEL VIDEO3
fCLK
CLK
CLK
0
SYNC
SYNC
1
VIDEO
OFFSET
GAIN
AND
0
1
fPIXEL
VSEL3
OUT1
OUTPUT2
(GREEN)
OUT2
OUTPUT3
(BLUE)
OUT3
EN
VIDEO
OFFSET
GAIN
EN
os3
gs3
EN3
OUTPUT1
(RED)
CLK_SEL
PERIODIC_OFF
PO
PO
fPIXEL
PRBS_N
PO_M
PRBS
OSCILLATOR
PO_M
fPIXEL
po_srt
po_stp
PO_DIS
fPIXEL
0
fPRBS1
1
SDA
SCL
SERIAL PORT
VEE
PO
GENERATOR
1
PRBS
fPRBS
PRBS_N
PO_M
PO_DIS
po_stp
po_srt
OUT_EN1,2,3,4
VSEL1,3,4
gs1,2,3,4
os1,2,3,4
VM_EN1,2,3,4
0
VSEL4
PRBS
GENERATOR
PRBS_SEL
CS
EP
VEE_T
EN1
EN2
EN3
EN4
VIDEO
OFFSET
GAIN
EN
os4
gs4
EN4
ENABLE LOGIC (i = 1, 2, 3, 4)
ENi
AND
OR
PORi
OUT_ENi
10
OUT4
EN_MAIN
VM
VM_ENi
NOTE: LOWERCASE ITALICS INDICATE A CONTROL REGISTER, UPPERCASE ITALICS INDICATE AN INTERNAL SIGNAL, HEAVY LINE INDICATES PARALLEL DATA.
Figure 2. MAX3600/MAX3600A Functional Diagram
OUTPUT4
(NOISE)
VCCA
VCCD
POR1
POR2
POR3
POR4
POWER-ON
RESET
VA1
VA2
VA3
VA4
+VCC
+VCC
+VRED
+VGREEN
+VBLUE
+VNOISE
Laser Driver for Projectors
SYNC
VCCA
VA2
VIDEO
BUFFERS
D0
D2
VA1
D3
10
os1
gs1
EN1
D6
D7
D8
VIDEO
OFFSET
GAIN
EN
OUTPUT1
OUT1
VCCA
VA1
MAX3600B
D1
+VRED
RED
LASER
D2
10
D4
D5
os3
gs3
EN3
D7
VA4
D8
VIDEO
OFFSET
GAIN
EN
OUTPUT3
+3.3V
VA2
VA3
D3
D6
D9
OUT3
+VBLUE
BLUE
LASER
D9
CLK
CLK
VEE_T, VEE
REF
CS
SDA
SCL
SYNC
VIDEO
BUFFERS
D0
VA4
D1
D5
+3.3V
VA3
MAX3600R
D4
PO
CONTROL
LOGIC
SERIAL PORT
VEE_T, VEE
REF
EP
CS
SDA
SCL
EN_MAIN
VM
NOTE: LOWERCASE ITALICS INDICATE A CONTROL REGISTER, UPPERCASE ITALICS
INDICATE AN INTERNAL SIGNAL, HEAVY LINE INDICATES PARALLEL DATA.
Figure 3. MAX3600R Functional Diagram
EP
SERIAL PORT
CONTROL
LOGIC
EN_MAIN
VM
NOTE: LOWERCASE ITALICS INDICATE A CONTROL REGISTER, UPPERCASE ITALICS
INDICATE AN INTERNAL SIGNAL, HEAVY LINE INDICATES PARALLEL DATA.
Figure 5. MAX3600B Functional Diagram
VCCD
SYNC
D0
VCCA
VA1
VIDEO
BUFFERS
MAX3600G
D1
+3.3V
VA3
VA4
VA2
D2
D3
10
D4
D5
D6
D7
D8
D9
CLK
OFFSET
GAIN
EN
EN4
EN
os4
gs4
REF
PO
VIDEO
os2
gs2
EN2
OFFSET
GAIN
VIDEO
OUTPUT2
OUTPUT4
OUT2
OUT4
+VGREEN
GREEN
LASER
NOISE
LASER
EP
PRBS NOISE GENERATOR
CS
SDA
SCL
SERIAL PORT
CONTROL
LOGIC
VEE_T, VEE
EN_MAIN
VM
NOTE: LOWERCASE ITALICS INDICATE A CONTROL REGISTER, UPPERCASE ITALICS
INDICATE AN INTERNAL SIGNAL, HEAVY LINE INDICATES PARALLEL DATA.
Figure 4. MAX3600G Functional Diagram
11
MAX3600
VCCD
VCCD
PO
MAX3600
Laser Driver for Projectors
Equation 1:
Video Input Buffers
The synchronous video data inputs (D0 to D9, SYNC,
× os 
VIDEO GHIGH × gs
 OS
CLK, and PO) are pseudo-differential. Each input is com-=
−I OUT
+ GLOW  +  HIGH

 + OS LOW
3FFh
FFh
FFh




pared to VREF, as shown in Figure 6.
D0 to D9, PO, and SYNC can be left open. SYNC can
be connected to REF if not used (for reduced power
consumption).
Video Demultiplexer
The video demultiplexer (Figure 7) can accommodate configurations as shown in the Typical Operating
Circuits. In Configuration 1 (Figure 19), 10-bit red, green,
and blue video data is time multiplexed. The SYNC signal is used to demultiplex the video data.
In Configuration 2 (Figure 21), each output driver uses
VIDEO2 as a data source.
where:
• Current into the laser driver is positive (out is negative)
• VIDEO is the 10-bit video input
• gs is the 8-bit gain setting register
• os is the 8-bit offset setting register
• GLOW is the minimum gain (mA)
• (GLOW + GHIGH) is the maximum gain (mA)
• OSHIGH is the maximum offset (mA)
• OSLOW is the minimum offset (mA)
Driver Outputs
The output compliance voltage (VC_ = VA_ - VOUT_,
Figure 9) defines the output voltage required to obtain
low overshoot and fast settling time.
The transfer characteristic of the driver outputs is shown
in Figure 10 and Equation 1.
Table 2 summarizes the typical output current capability
for each driver output. Table 3 summarizes the maximum
ratings for each driver output.
Table 2. Driver Output Typical Parameter
Summary
Table 3. Driver Output Absolute
Maximum Ratings (Current Out of Part)
The driver outputs provide currents to the lasers as
shown in Figure 8.
PARAMETER
OUT1
(mA)
OUT2
(mA)
OUT3
(mA)
OUT4
(mA)
Minimum Gain (GLOW)
12
40
10
10
Maximum Gain
(GLOW + GHIGH)
227
690
170
185
Maximum Offset
(OSHIGH)
83
83
83
155
VDDQ/2
VDDQ
OUT1
(mA)
OUT2
(mA)
OUT3
(mA)
OUT4
(mA)
DC Current
(TJ = +125NC)
320
735
245
310
DC Current
(TJ = +110NC)
480
1100
382
465
Peak Current
(t < 1Fs, TJ = +125NC)
640
1470
490
620
PARAMETER
REF
VIDEO BUFFER
VIDEO
PROCESSOR
VIDEO DATA
(LVCMOS)
Figure 6. Video Inputs
12
RTT
RT
D0–D9,
CLK, PO,
2RTT
SYNC
RTT
MAX3600
MAX3600A
MAX3600R
MAX3600G
MAX3600B
Laser Driver for Projectors
D
+VCC
IOUT (A)
Q
VIDEO1
Q
VA
0
D
VC = VA - VOUT
LASER DRIVER
OUT
VC (V)
D
Q
MAX3600
VIDEO DEMULTIPLEXER
VIDEO2
VA - VOUT
IOUT
Q
0
TIME
D
D
VIDEO3
Figure 9. Output Compliance Voltage
Q
D
DATA TO OUTPUT CHARACTERISTIC
IOUT
D9:D0
CLK
0
fPIXEL
D
SYNC
Q
1
GAIN
OFFSET
CLK_SEL
CLOCK ON BOTH EDGES (DDR)
0
CLOCK ON RISING EDGE
Figure 7. Video Demultiplexer
VIDEO
3FFh
GAIN CHARACTERISTIC
IOUT
VA_
DRIVER OUTPUTS
GAIN (8-BIT)
GAIN
DAC
VIDEO (10-BIT)
OFFSET (8-BIT)
0
FFh
1
0
0
IDAC
VIDEO
3FFh
OFFSET CHARACTERISTIC
IOUT
OFFSET
DAC
EN
OUT_
Figure 8. Driver Output
)
G LOW
gs_ = 0 (GAIN = GLOW)
VIDEO DAC
0
IN
(GA
REFERENCE
1
0
=
gs_
H+
IG
= GH
OSHIGH
os_ = FFh (OFFSET = osHIGH)
OSLOW
os_ = 0 (OFFSET = osLOW)
0
VIDEO
3FFh
Figure 10. Data to Output Characteristics
13
Control Logic
The control logic provides video selection, laser enable,
and power savings.
Video Selection
The video demultiplexer creates signals VIDEO1,
VIDEO2, and VIDEO3. The VSEL[1/3/4] bits can be used
to select the input video for OUTPUT1, OUTPUT3, and
OUTPUT4.
Laser Control
When EN_MAIN is low, all driver outputs are off. This
signal works asynchronously (no clock is required to
disable outputs).
The video marker (VM) input can be used to disable
selected outputs when a video signal is not present
(Figure 11). The VM_EN[1:4] bit settings determine
which outputs respond to the VM signal.
Propagation delay from VM↑ or EN_MAIN↑ to output
active is typically 35ns + 2/fPIXEL.
Periodic Off Generator
The periodic off (PO) generator quickly switches off
OUTPUT2. The PO event is placed within a pixel if PO is
set high during a pixel as shown in Figure 12.
The PO event location within the pixel is programmed
from the serial port. Each pixel is divided into “m” equal
time subpixels as shown in Figure 13. The PO_M setting
determines the number of subpixels, where:
m = (PO_M +1) x 8
The PO start and PO stop locations (in subpixels) are
defined by the P1, P1S, P2, and P2S bits.
Start Subpixel =
[(P1 + 1) MOD (PO_M + 1)] x 8 + P1S + 1
Stop Subpixel =
[(P2 + 1) MOD (PO_M + 1)] x 8 + P2S + 1
The start and stop locations should be selected to
ensure that the PO event occurs > one rise/fall time from
the pixel update. The minimum off-time is four subpixels.
Select P1, P2 P PO_M.
The PO oscillator frequency (fPO) = fPIXEL x (PO_M + 1).
The intended operating range for fPO is 133MHz to
200MHz.
OUT2 (GREEN LASER CURRENT)
VIDEO AREA
VM = 1
VERTICAL SCAN
MAX3600
Laser Driver for Projectors
PO EVENT
NONVIDEO AREA (VM = 0)
SELECTED OUTPUTS DISABLED
PO
PIXEL 1
PIXEL 2
PIXEL 3
PIXEL 4
1
0
1
0
TIME
HORIZONTAL SCAN
Figure 11. Video Marker
14
Figure 12. Periodic Off (PO) Example
Laser Driver for Projectors
PO
START
SUBPIXEL
PRBS Oscillator
PO
STOP
1 . . . . . . . . . m 1 . . . . . . . . . m
PO
VIDEO2
1
1
PIXEL 1
PIXEL 2
PRBS Generator
TIME
Figure 13. PO Subpixels
PO_M
PRBS_N
Output 4 can be used to generate random noise. A
32-bit shift register with feedback generates pseudorandom codes. The PRBS_SEL bit selects the PRBS
clock source.
Serial Port and Registers
Table 4. PO Subpixel Programming
tPIXEL
(ns)
The PRBS oscillator creates clock fPRBS1, which can be
input to the PRBS generator. The oscillator frequency
is determined by the PRBS_N bit setting as shown in
Table 5. The recommended range for fPRBS1 is 100MHz
to 150MHz. Note that the PRBS oscillator is not phaselocked to the pixel clock. Therefore, OUT4 updates are
not synchronous to the pixel clock when the PRBS oscillator is used.
SUBPIXELS
(m)
fPRBS1
(MHz)
10
1
3
16
136
12
1
2
16
125
14
1
0
16
129
16
2
3
24
128
18
2
2
24
125
20
2
1
24
120
22
2
0
24
123
24
3
2
32
125
26
4
3
40
131
28
4
3
40
121
30
4
2
40
125
32
4
1
40
125
34
5
3
48
120
36
5
2
48
125
38
6
3
56
125
40
6
3
56
119
The serial port provides a 3-wire interface with bidirectional data (SDA), clock input (SCL), and a chip-select
input (CS) as shown in Figure 14. Table 6 shows the
register addresses. The external master initiates a data
transfer by asserting the CS pin.
Write Mode (R/W = 0): The master generates 16 clock
cycles. It outputs 16 bits (MSB first) to the SDA line at the
falling edge of the clock. The master ends the transmission by setting CS high. The laser driver updates control
registers on the rising clock edge of the last data bit.
Read Mode (R/W = 1): The master generates 16 clock
cycles. It outputs 8 bits (MSB first) to the SDA line at the
falling edge of the clock. The SDA line is released after
the R/W bit has been transmitted. The slave outputs 8
bits of data (MSB first) at the rising edge of the clock. The
master ends the transmission by setting the CS pin high.
Read clock speed is determined by the external pullup
resistor and parasitic capacitance at the SDA pin.
Table 5. PRBS Oscillator
PRBS_N
fPRBS1/fPO
0
0.9
1
0.8
2
0.75
3
0.68
15
MAX3600
IOUT2
MAX3600
Laser Driver for Projectors
WRITE MODE
CS
tT
tL
tCH
SCL
0
1
2
SDA
A6
3
4
5
6
7
A3
A2
A1
A0
R/W
8
9
10
11
12
13
14
D7
D6
D5
D4
D3
D2
D1
15
tDS
tCL
A5
A4
tDH
D0
MSB
LSB
READ MODE
CS
tL
tT
tCH
SCL
0
1
2
SDA
A6
3
4
5
6
7
8
9
tDS
tCL
A5
A4
10
11
12
13
14
15
tD
A3
A2
A1
R/W
A0
D7
D6
D5
D4
D3
D2
D1
D0
tDH
Figure 14. Serial Port Timing Diagram
Table 6. Register Map
ADDRESS
NAME
DESCRIPTION
BIT 7
00h
os1
OUTPUT1 Offset
MSB
BIT 6
BIT 5
BIT 4
LSB
01h
gs1
OUTPUT1 Gain
MSB
LSB
02h
os2
OUTPUT2 Offset
MSB
LSB
03h
gs2
OUTPUT2 Gain
MSB
LSB
04h
os3
OUTPUT3 Offset
MSB
LSB
05h
gs3
OUTPUT3 Gain
MSB
LSB
06h
os4
OUTPUT4 Offset
MSB
LSB
07h
gs4
OUTPUT4 Gain
MSB
Enable
OUT_
EN1
OUT_
EN2
OUT_
EN3
OUT_
EN4
VM_EN1
VM_EN2
VM_EN3
VM_EN4
Video Data
Control
X
X
X
VSEL1
VSEL3
VSEL4
PRBS_
SEL
CLK_
SEL
BIT 2
BIT 1
BIT 0
LSB
08h
enable
09h
cnfig
0Ah
osc
Oscillator
X
X
PRBS_N
MSB
PRBS_N
LSB
PO_DIS
PO_M
MSB
PO_M
PO_M
LSB
0Bh
po_srt
PO Start
Subpixels
X
X
P1
MSB
P1
P1
LSB
P1S
MSB
P1S
P1S
LSB
0Ch
po_stp
PO Stop
Subpixels
X
X
P2
MSB
P2
P2
LSB
P2S
MSB
P2S
P2S
LSB
Note: Registers default to (0) at power-on (unless a different default value is noted).
16
BIT 3
Laser Driver for Projectors
BIT
NAME
DEFAULT
7:5
X
0
Unused.
4
VSEL1
0
Video select for OUTPUT1. 0 = VIDEO1, 1 = VIDEO2.
3
VSEL3
0
Video select for OUTPUT3. 0 = VIDEO3, 1 = VIDEO2.
2
VSEL4
0
Video select for OUTPUT4. 0 = PRBS, 1 = VIDEO2.
1
PRBS_SEL
0
PRBS clock source select. 1 = fPRBS1, 0 = fPIXEL.
0
CLK_SEL
1
Pixel clock source select. 0 = CLK pin, 1 = SYNC pin.
MAX3600
Table 7. cnfig Register Bit Description
DESCRIPTION
Table 8. osc Register Bit Description
BIT
NAME
DEFAULT
DESCRIPTION
7:6
X
0
Unused.
5:4
PRBS_N
0
PRBS oscillator configuration. See Table 5. Bit 5 is the MSB, and bit 4 is the LSB.
3
PO_DIS
0
Disables the output of the PO pulse generator. When the value is 1, no PO pulses
are created.
2:0
PO_M
1
PO oscillator control. See Table 4. Bit 2 is the MSB, and bit 0 is the LSB.
Table 9. po_srt Register Bit Description
BIT
NAME
DEFAULT
7:6
X
0
Unused.
DESCRIPTION
5:3
P1
1
These bits contain the P1 parameter used to program the PO start subpixel.
2:0
P1S
4
These bits contain the P1S parameter used to program the PO start subpixel.
Table 10. po_stp Register Bit Description
BIT
NAME
DEFAULT
7:6
X
0
Unused.
DESCRIPTION
5:3
P2
0
These bits contain the P2 parameter used to program the PO stop subpixel.
2:0
P2S
1
These bits contain the P2S parameter used to program the PO stop subpixel.
17
Laser Driver for Projectors
MAX3600
Power-On-Reset
POWER-ON RESET
VCCA
VPOR1
VA1
AND
POR1
AND
POR2
VPOR2
VA2
The power-on reset monitors the supply voltages of
the circuit (Figure 15). It is recommended that VCC
be applied to the IC before VA1 to VA4 are applied as
shown in Figure 16. On power-down, it is recommended
that VA1 to VA4 are powered down before VCC. Failure
to follow the sequencing recommendation can result
in device stress, but has not been observed to cause
immediate damage.
Design Procedure
Supply Filter
VPOR2
VA3
AND
POR3
AND
POR4
VPOR3
VA4
VPOR2
Element CA (see the Typical Operating Circuits) is present to reduce supply noise and provide a ground return
path for switched current. Select CA R 10FF. CA can be
composed of two or three capacitors in parallel.
Use care to ensure VA3 does not exceed +9V at any
time, including power-on, as this can damage the ESD
protection circuitry.
Compensation Network
Optional compensation elements RC and CC can be
used to compensate the inductive load of the laser
(Figure 17). The resulting filter reduces ringing and
increases the switching time of the laser driver. The best
values for RC and CC should be found by experimentation. Note that CC must be charged before light output
appears from the laser. If a compensation network is
used, minimize inductance in the ground return.
Figure 15. Power-On Reset
VOLTS
DATA AND CLOCK INPUTS
VA_
Typical starting values:
tVCC_ON (0.1µs)
RC ≈ RL to 2 x RL (RL = Laser Resistance)
CC ≈ 1/(2G fVIDEO x RL)
VCC
Ringing of the green laser can be reduced with resistor
RD.
TIME
Figure 16. Power-Supply Sequencing
LASER
DRIVER
+VA_
VA_
RD
LASER
OUT_
CC
RC
Figure 17. Optional Compensation Components
18
CA
PCB Layout
Place the green laser as close to the laser driver as possible. The green laser typically has a small resistive component and is more sensitive to inductance than other
laser connections. The green laser connection should
appear as a low-impedance transmission line. Use wide
traces located close to the ground plane for maximum
capacitance.
The connection from OUT2 to the laser should be as short
as possible, ideally < 1cm. The connection distance from
the laser cathode, across the ground plane, through the
filter capacitor, to VA2, is ideally < 1cm.
Laser Driver for Projectors
It is best to solder the laser to the PCB. If a connector is required, minimize inductance. Inductance
> 10nH at OUT2 could cause large ringing. When routing
OUTPUT1 and OUTPUT2, route connections to the VA_
pins on the top layer, and connect the OUT_ pins to the
laser through vias.
Laser Driver Thermal Considerations
The circuit is designed to meet specifications with an
operating junction temperature (TJ) up to +125NC. The
junction temperature is estimated by:
TJ ≈ [(ICC)(VCC) + C (IVA_)(VC_)] BJA + TA
The recommended thermal path is through the package backside exposed pad (EP). A heatsink on the
package top does not significantly reduce junction
Table 11. Thermal Design Properties
SYMBOL
VALUE
Ambient Temperature
PARAMETER
TA
—
Operating Junction
Temperature
TJ
P +125NC
Thermal Resistance,
Junction-to-Case
BJC
+2NC/W
Thermal Resistance,
Junction-to-Ambient,
Multilayer Board
BJA-2
+28NC/W
temperature. Recommendations for PCB design are
found in Application Note 862: HFAN-08.1: Thermal
Considerations of QFN and Other Exposed-Paddle
Packages.
Applications Information
Connecting OUT2 and OUT4
It is possible to connect OUT4 and OUT2 to achieve a
higher output current. There is a small delay on OUT4
relative to OUT2. Note that OUT4 linearity performance
is lower than OUT2 linearity.
Eye Safety
Specification IEC 825 defines the maximum safe output
of optical devices. This laser driver provides enable features that aid compliance with IEC 825. Using this laser
driver alone does not ensure that a product is compliant
with IEC 825. The entire transmitter circuit and component selections must be considered. Maxim products are
not designed for use as components in systems where
the failure of a Maxim product could create a situation
where injury could occur.
IOUT
50%
SETTLING
TIME
ISWITCH
IFINAL
TIME
Figure 18. Settling Time and Measurement
Note: Package thermal resistances were obtained using the
method described in JEDEC specification JESD51-7, using a
four-layer board. For detailed information on package thermal
considerations, refer to www.maxim-ic.com/thermal-tutorial.
19
MAX3600
Consider the power supply on the VA_ pins. Droop on
these pins reduces the compliance voltage. Use two or
three capacitors to bypass VA_ to ground. Place a small
capacitor close to the VA2 pin to keep the ground return
loop small. A larger capacitor can be located farther
from VA_.
Laser Driver for Projectors
MAX3600
Typical Operating Circuits
ENABLE (3.3V CMOS)
VIDEO CLOCK (3.3V CMOS)
VIDEO SYNC (CMOS)
VIDEO (CMOS)
GREEN OFF* (CMOS)
EN_MAIN
CLK
SYNC
D0–D9
PO
LASER DRIVER
10
MAX3600
MAX3600A
+1.8V TO +3.3V
VDDQ
+VRED
VA1
CA1
RED LASER
OUT1
CC1
RC1
+VNOISE
+VGREEN
VA4
VA2
CC2
CA2
RC2
CA3
RD2
REF
VIDEO PROCESSOR
OUT2
OUT4
GREEN LASER
+VBLUE
VA3
VIDEO MARKER* (3.3V CMOS)
CHIP SELECT (3.3V CMOS)
SERIAL DATA (3.3V CMOS)
SERIAL CLOCK (3.3V CMOS)
VM
CS
SDA
SCL
VEE_T
VEE
EP
CA4
BLUE LASER
OUT3
CC3
RC3
VCCA
VCCD
+3.3V (VCC)
0.1µF
*GREEN OFF AND VIDEO MARKER SIGNALS ARE OPTIONAL.
Figure 19. Typical Operating Circuit: Configuration 1
Configuration 1: RGB Laser Driver
with DDR Clock
Configuration 1 is described in Figures 19 and 20 and
Table 12.
• 10-bit video (D0 = LSB, D9 = MSB), DDR clock
• Data is multiplexed R-G-B (Figure 20)
PIXEL
R
G
B
R
G
B
R
SYNC
0
0
1
0
0
1
0
PO
0
1
0
0
0
0
0
tH
tSU
CLK
Table 12. Configuration 1 Register Settings
BIT
SETTING
VSEL1
0
VIDEO1 à red laser
VSEL3
0
VIDEO3 à blue laser
VSEL4
0
PRBS à noise diode
CLK_SEL
1
DDR clock with SYNC
OUT_EN[1:4]
1
Enable outputs
NOTES
Note: See the Detailed Description section for more information about register programming.
20
PIXEL 2 (WITHOUT PO EVENT)
D0–D9
• SYNC = 1 when blue data is on D0 to D9
• PO event occurs when PO = 1
PIXEL 1 (WITH PO EVENT)
VIDEO1
R
R
VIDEO2
G
G
VIDEO3
B
B
R = RED DATA, G = GREEN DATA, B = BLUE DATA.
Figure 20. Configuration 1: Video Data Format
Laser Driver for Projectors
+VDDQ
10
D0–D9
VDDQ/2
CHIP-SELECT RED (3.3V CMOS)
VIDEO MARKER RED (3.3V CMOS)
10
CLOCK GREEN (CMOS)
MAX3600R
D0–D9
CHIP-SELECT GREEN (3.3V CMOS)
GREEN OFF (3.3V CMOS)
VIDEO MARKER GREEN (3.3V CMOS)
10
RPO
VEE_T, VEE
EP
CLOCK BLUE (CMOS)
CHIP-SELECT BLUE (3.3V CMOS)
VIDEO MARKER BLUE (3.3V CMOS)
CC2
RD2
RC2
GREEN LASER
OUT2
NOISE
DIODE
OUT4
VEE_T, VEE
EP
VCCA, VCCD
VA3
+VCC
+VBLUE
VA1
VA2
VA4
LASER DRIVER 3
CLK
VDDQ/2
+VCC
+VGREEN
+VNOISE
MAX3600G
SYNC
REF
CS
SERIAL PORT, EN_MAIN
PO
VM
D0–D9
RED LASER
PO
OUT1
OUT2
OUT4
VIDEO BLUE (CMOS)
+VRED
OUT1
VCCA, VCCD
VA2
VA4
VA1
LASER DRIVER 2
VA3
CLK
VDDQ/2
VA1
VA2
VA4
VA3
LASER DRIVER 1
SYNC
REF
SERIAL PORT, EN_MAIN
CS
VM
OUT1
OUT3
OUT4
VIDEO PROCESSOR
+VCC
VCCA, VCCD
CLK
CLOCK RED (CMOS)
VIDEO GREEN (CMOS)
OUT2
OUT3
OUT4
MAX3600
POWER
ENABLE (3.3V CMOS)
SERIAL DATA (3.3V CMOS)
SERIAL CLOCK (3.3V CMOS)
VIDEO RED (CMOS)
MAX3600B
BLUE LASER
OUT3
SYNC
REF
SERIAL PORT, EN_MAIN
CS
VM
RPO
PO
VEE_T, VEE
EP
Figure 21. Typical Operating Circuit: Configuration 2
Table 13. Configuration 2 Register Settings
Configuration 2: Video Data
with RZ Clock
Configuration 2 is described in Figures 21 and 22 and
Table 13.
• 10-bit video (D0 = LSB, D9 = MSB)
• Return-to-zero clock
•V
ideo data is always routed to VIDEO2, for constant
delay from clock to output
• Achieves highest possible resolution
LDD
BIT
VALUE
1
VSEL1
1
VIDEO2 à red laser
NOTES
1
OUT_EN1
1
Enable OUT1
1, 2, 3
CLK_SEL
0
Select RZ clock
2
OUT_EN2,
OUT_EN4
1
Enable OUT2, OUT4
3
VSEL3
1
VIDEO2 à blue laser
3
OUT_EN3
1
Enable OUT3
Note: See the Detailed Description section for more information about register settings.
21
tSU
tH
CLK
V
V
V
20 EN_MAIN
VEE 32
19 SCL
VM 33
18 CS
VA1 37
VCCD 38
16 VEE
15 VA3
14 OUT3
13 RES
*EP
+
REF 39
12 CLK
11 SYNC
4
5
6
D5
3
D4
2
D3
1
D2
PO 40
D1
Figure 22. Configuration 2: Video Data Format
17 SDA
MAX3600
MAX3600A
MAX3600R
MAX3600G
MAX3600B
VA1 35
OUT1 36
V = VIDEO DATA.
VEE_T
30 29 28 27 26 25 24 23 22 21
N.C. 31
VCCA 34
VIDEO2
VA4
V
7
8
9
10
D9
V
OUT4
V
D8
V
VEE
D0–D9
TOP VIEW
D7
0
D6
0
OUT2
0
VA2
1
OUT2
PO
VA2
Pin Configuration
PIXEL WITHOUT PO PIXEL WITHOUT PO PIXEL WITHOUT PO
VA2
PIXEL WITH PO
OUT2
PIXEL
D0
MAX3600
Laser Driver for Projectors
THIN QFN
(5mm × 5mm)
*EXPOSED PAD.
Package Information
For the latest package outline information and land patterns, go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the
package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the
package regardless of RoHS status.
22
PACKAGE TYPE
PACKAGE CODE
OUTLINE NO.
LAND PATTERN NO.
40 TQFN-EP
T4055+2
21-0140
90-0002
Laser Driver for Projectors
REVISION
NUMBER
REVISION
DATE
DESCRIPTION
PAGES
CHANGED
0
7/09
Initial release
—
1
10/09
Corrected errors for SCL in Figure 14
16
8/10
Removed future status from the MAX3600A in the Ordering Information table; added
the soldering temperature to the Absolute Maximum Ratings section; in the Electrical
Characteristics table updated the analog supply voltage and analog supply current
values, added compliance voltage, updated maximum offset values, and added
propagation delay; corrected the equation in Note 3; corrected the units for VD in
Table 1; replaced Figure 7; added the land pattern no. to the Package Information
table
2
1–5, 13, 22
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Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2010 Maxim Integrated Products 23
Maxim is a registered trademark of Maxim Integrated Products, Inc.
MAX3600
Revision History