Download Output Capacitor-less Video Drivers High-performance Video Driver Series

High-performance Video Driver Series
Output Capacitor-less
Video Drivers
No.09064EAT02
BH76806FVM, BH76809FVM, BH76812FVM, BH76816FVM
●Description
The BH768xx series video drivers are the optimum solution for high density integration systems such as, digital still
cameras, mobile phones, and portable video devices. A built-in charge pump circuit eliminates the need for a large output
coupling capacitor. Features include: a built-in LPF, low-voltage (2.5 V) operation, and 0 µA current consumption during
standby mode.
●Features
1)
Select from four video driver amp gain settings: 6 dB, 9 dB, 12 dB, and 16 dB
2)
Large-output video driver with maximum output voltage of 5.2 Vpp.
Supports wide and low-voltage operation range.
3)
No output coupling capacitor is needed, which makes for a more compact design
4)
Built-in standby function sets circuit current to 0 µA (typ.) during standby mode
5)
Clear image reproduction by on-chip 8-order 4.5-MHz LPF (Low Pass Filter)
6)
Bias input method is used to support chroma, video, and RGB signals.
7)
MSOP8 compact package
●Applications
Mobile telephones, DSCs (digital still cameras), DVCs (digital video cameras), portable game systems,
portable media players, etc.
●Line up matrix
Part No.
Video driver amp gain
Recommended input level
BH76806FVM
6dB
1Vpp
BH76809FVM
9dB
0.7Vpp
BH76812FVM
12dB
0.5Vpp
BH76816FVM
16.5dB
0.3Vpp
●Absolute maximum ratings
（Ta=25℃）
Parameter
Symbol
Ratings
Unit
Supply voltage
Vcc
3.55
V
Power dissipation
Pd
470
mW
Operating temperature range
Topr
-40～+85
℃
Storage temperature range
Tstg
-55～+125
℃
＊ Reduce by 4.7 mW/C over 25C, when mounted on a 70mm×70mm×1.6mm PCB board.
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© 2009 ROHM Co., Ltd. All rights reserved.
1/16
2009.03 - Rev.A
Technical Note
BH76806FVM, BH76809FVM, BH76812FVM, BH76816FVM
●Operating range (Ta=25℃)
Parameter
Symbol
Min.
TYP.
Max.
Unit
Supply voltage
Vcc
2.5
3.0
3.45
V
●Electrical characteristics (Unless otherwise noted, Typ.: Ta=25℃, VCC=3V)
Parameter
Symbol
Circuit current 1
ICC1
Circuit current 2
ICC2
Standby SW input current
High-Level
Typical value
BH76806
FVM
BH76809
FVM
BH76812
FVM
Conditions
No signal
0.0
μA
Standby mode
IthH
45
μA
When 3.0 V is applied to 4pin
Standby switching voltage
High-Level
VthH
1.2V min
V
standby OFF
Standby Switching voltage
Low-Level
VthL
0.45Vmax
V
standby ON
Voltage gain
GV
dB
Vo=100KHz, 1.0Vpp
6.0
15
Unit
mA
Maximum output level
16
BH76816
FVM
9.0
12.0
16.5
Vomv
5.2
Vpp
f=1KHz,THD=1%
Frequency characteristic 1
Gf1
-0.45
dB
f=4.5MHz/100KHz
Frequency characteristic 2
Gf2
-3.0
dB
f=8.0MHz/100KHz
Frequency characteristic 3
Gf3
-32
dB
f=18MHz/100KHz
Frequency characteristic 4
Gf4
-51
dB
f=23.5MHz/100KHz
Differential Gain
DG
0.5
%
Vo=1.0Vp-p
Standard stair step signal
Differential Phase
DP
1.0
deg
Vo=1.0Vp-p
Standard stair step signal
Y signal output S/N
SNY
+74
+73
+70
+70
dB
C signal output S/N (AM)
SNCA
+77
+76
+75
+75
dB
C signal output S/N (PM)
SNCP
+65
dB
Output pin source current
lextin
30
mA
Output DC offset voltage
Voff
±50max
mV
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2/16
Band = 100 kHz to 6 MHz
75 Ω termination
100% chroma video signal
Band = 100～500KHz
75Ωtermination
100％chroma video signal
Band = 100～500KHz
75Ωtermination
100％chroma video signal
4.5 V applied via 150 Ω to
output pin
75 Ω termination
2009.03 - Rev.A
Technical Note
BH76806FVM, BH76809FVM, BH76812FVM, BH76816FVM
●Measurement circuit
1. 0 u F
1
8
IN
1
S W2
A
V2
( V C C)
2
OUT
2
7
GND
10 u
0. 1 u
S W3
1. 0 u F V
NV CC
6d B/ 9d B /
L PF
3
12 d B /1 6. 5d B
6
150K
0. 1 u
OS C 1
C HA RGE PU MP
50
4
V4
5
4. 7 u 7 5
V
※
75
Test circuit is intended for shipment inspections, and differs from application circuit.
Fig. 1
●Control pin settings
Parameter
Standby（4pin）
States
Note
H
Active
L
Standby
OPEN
Standby
●Block diagram
C1
C1
C2
8 C2
1
IN
VCC
VCC
CHARGE PUMP
OUT
NVCC
7 NVCC
2
GND
NVCC
6dB/9dB/
LPF
3
12dB/16.5dB
AMP
150K
VVin
in
STBY
STBY
4
6
5
GND
GND
Vout
Vout
Fig.2
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© 2009 ROHM Co., Ltd. All rights reserved.
3/16
2009.03 - Rev.A
Technical Note
BH76806FVM, BH76809FVM, BH76812FVM, BH76816FVM
●Pin descriptions
Pin
No.
Pin
name
1
C1
equivalent circuit
VCC
VCC
DC
voltage
Functions
+VCC
↑↓
0V
Flying capacitor "+" pin
VCC
VCC Pin
C1
See function description for pins 7
and 8
GND
GND
NVCC
2
VCC
VCC
Video signal input pin
VIN
3
VIN
100
VIN
4 . 1k
4 . 1k
0V
150K
Adaptive input signal
Composite video signal/
chroma signal/RGB signal, etc.
NV
NVCC
150k
1μF
VCC
VCC
50K
STBY
4
STBY
VCC
to
0V
250K
200K
GND
ACTIVE/STANBY Switching Pin
Terminal
MODE
Votage
1.2V～VCC
ACTIVE
(H)
0V～0.45V
STANBY
(L)
GND
VCC
VCC
5
Video signal output pin
VOUT
0V
VOUT
VOUT
75Ω
NVCC
NVCC
75Ω
1K
VCC
6
GND
0V
GND
GND Pin
NVCC
＊1
＊2
The DC voltage in the figure is VCC = 3.0 V. These values are for reference only and are not guaranteed.
These values are for reference only and are not guaranteed.
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4/16
2009.03 - Rev.A
Technical Note
BH76806FVM, BH76809FVM, BH76812FVM, BH76816FVM
●Pin descriptions
Flying capacitor “-”pin
(8pin)
VCC
GND
7
NVCC
VCC
VCC
-VCC
C1
(-2.75V)
C2
0V
GND
VCC
VCC
8
C2
C2
0V
↑↓
-VCC
(-2.75V)
NVCC
NVC
NVC
Load voltage pins (7 pins)
＊1
＊2
The DC voltage in the figure is VCC = 3.0 V. These values are for reference only and are not guaranteed.
These values are for reference only and are not guaranteed.
●Description of operations
1)
Principles of video driver with no output coupling capacitor
Amp (Single power supply)
VCC
Amp (Dual power supply)
Output capacitor is required due to DC
voltage at output pin
VCC
DC voltage is not applied to output pin
75Ω
1000μF
Output capacitor is not required since
75Ω
75Ω
75Ω
-VCC
1/2VCC Bias
Fig.3
Fig.4
When the amplifier operates using single voltage power supply, the operating potential point is approximately 1/2 Vcc.
Therefore, a coupling capacitor is required to prevent DC output. For the video driver, the load resistance is 150 Ω (75 Ω
+ 75 Ω). Therefore, the coupling capacitor should be about 1000 µF when a low bandwidth for transmission is considered.
(See Figure 3.)
When the amplifier operates using a dual (±) power supply, the operating point can be set at GND level, and therefore,
there is no need for a coupling capacitor to prevent DC output.
Since a coupling capacitor is not needed, there is no sagging of low-frequency characteristics in output stage. (See Figure
4.)
2)
Generation of negative voltage by charge pump circuit
As is shown in Figure 5, the charge pump consists of a pair of switches (SW1 and SW2) and a pair of capacitors (flying
capacitor and load capacitor), generating a negative voltage. When +3 V is applied to this IC, approximately -2.83 V of
negative voltage is obtained.
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5/16
2009.03 - Rev.A
Technical Note
BH76806FVM, BH76809FVM, BH76812FVM, BH76816FVM
Vcc +3V
Vcc +3V
charge current
charge current
SW1
+
SW2
+
－
－
-Vcc is generated
SW1
SW2
Flying capacitor
Vcc +3V
charge current
Load capacitor
Flying capacitor
charge current
+
－ Load capacitor
+
charge transfer mode
－
+
－
+
－
Fig. 5
1)
-Vcc is generated
Principles of Charge Pump Circuit
Configuration of BH768xxFVM Series
As is shown in Figure 6, in the BH768xxFVM Series, a dual power supply amplifier is integrated with a charge pump circuit
in the same IC. This enables operation using a + 3V single power supply while also using a dual power supply amplifier,
which eliminates the need for an output coupling capacitor.
VCC
1μF
Dual power supply amp
アンプ H768xxFVM
75Ω
AMP
150k
75Ω
Single chip
integration
VCC
Output capacitor not required
for single power supply either.
-VCC
Charge Pump
3.3μF
1μF
2)
Charge pump
768xxFVM
Fig. 6 BH768xxFVM Configuration Diagram
Input terminal type and sag characteristics
BH768xxFVM Series devices provide both a low-voltage video driver and a large dynamic range (approximately 5.2 Vpp).
A resistance termination method (150 kΩ termination) is used instead of the clamp method, which only supports video
signals, since it supports various signal types.
The BH768xxFVM series supports a wide range of devices such as, video signals, chroma signals, and RGB signals that
can operate normally even without a synchronization signal.
In addition, input terminating resistance (150 kΩ) can use a small input capacitor without reducing the sag low-band
It is recommended to use a H-bar signal when evaluating sag characteristics, since it makes sag more noticeable. (See
Figures 7 to 10.)
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6/16
2009.03 - Rev.A
Technical Note
BH76806FVM, BH76809FVM, BH76812FVM, BH76816FVM
Sag is determined
by input capacitor
and input
resistance only.
Cut-off frequency for input capacitor and input impedance is
the same as when the output capacitor is set at 1000 µF with
an ordinary 75 Ω driver.
1 μF X 150 KΩ = 1000 μF X 150 Ω
(Input terminal time constant) (Output terminal time constant)
1μF
150k
Sag
Fig. 7
a)
75Ω+75Ω=150Ω
Sag-free video signal (TG-7/1 output, H-bar)
H-bar signal's TV screen
output image
Fig. 8
BH768xxFVM output (input = 1.0 µF, TG-7/1 output, H-bar)
b)
75Ω
Monitor
TG-7/1
75Ω
75Ω
150k
1μF
BH768xxFVM
Fig. 9
Nearly identical sag characteristics
c)
1000 uF + 150 Ω sag waveform (TG-7/1 output, H-bar)
Monitor
75Ω
1000μF
75Ω
TG-7/1
Fig. 10
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© 2009 ROHM Co., Ltd. All rights reserved.
7/16
2009.03 - Rev.A
Technical Note
BH76806FVM, BH76809FVM, BH76812FVM, BH76816FVM
●Application circuit
1.0μF(C18)
1
8
IN
※ 10Ω(R2)
CHARGE PUNP
7
2
GND
3.3μF
LPF
3
L:Standby
High
Active
Open
Standby
Low
Standby
6
150k
1.0μF(C3)
1.0μF(C7)
NVCC
6dB/9dB/
12dB/16.5dB
(C2)
VIDEO IN
OUT
75Ω(R5)
5
4
VIDEO OUT
※Although ROHM is confident that the example application circuit reflects the best possible
recommendations, be sure to verify circuit characteristics for your particular application.
Fig. 11
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© 2009 ROHM Co., Ltd. All rights reserved.
8/16
2009.03 - Rev.A
Technical Note
BH76806FVM, BH76809FVM, BH76812FVM, BH76816FVM
1.Effects of charge pump
circuit’s current ripple
10Ω
Vcc
Vcc pin
2.Current ripple affects DAC, etc.
1μF
1μF
3.3μF
VOUT
VIN
75Ω
VIDEO
DAC etc.
150kΩ
AMP
75Ω
-Vcc
Charge Pump
1μF
Fig. 12
Effect of Charge Pump Circuit's Current Ripple on External Circuit
1) Decoupling capacitor only
Current waveform (A) between single
power supply and capacitor
10mA/div
Current waveform (B)
between capacitor and IC
10mA/div
Vcc
A
A
A B
Vcc
Fig.13
2) Decoupling capacitor + Resistance 10Ω
Current waveform (A) between single
power supply and capacitor
10mA/div
Current waveform (B)between single
power supply and capacitor
10mA/div
Vcc
Current waveform (C)between single
power supply and capacitor
10mA/div
A
Fig.14
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© 2009 ROHM Co., Ltd. All rights reserved.
10Ω
A
A
B
A
C
Vcc
9/16
2009.03 - Rev.A
Technical Note
BH76806FVM, BH76809FVM, BH76812FVM, BH76816FVM
●Pattern diagram of evaluation board
STBY
ACT
GND
VIN
GND
R3
R2
VOUT
R1
C4
C3
C2
VCC
C1
GND
GND
GND
GND
GND
ROHM
Fig. 15
●List of external components
Symbol
C1
BH76806/09/12/16FVM
Function
Recommended
value
Remark
Flying capacitor
1μF
B characteristics are recommended
C2
Tank capacitor
1μF
B characteristics are recommended
C3
Input coupling capacitor
1μF
B characteristics are recommended
C4
Decoupling capacitor
3.3μF
B characteristics are recommended
R1
Output resistor
75Ω
R2
Output terminating resistance
75Ω
R3
Input terminating resistance
75Ω
Input connector
BNC
Output connector
RCA (pin jack)
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© 2009 ROHM Co., Ltd. All rights reserved.
10/16
－
Not required when connecting to TV
or video signal test equipment.
Required when connecting to video
signal test equipment.
2009.03 - Rev.A
Technical Note
BH76806FVM, BH76809FVM, BH76812FVM, BH76816FVM
●Reference data
BH76812FVM
Ta=25℃
BH76812FVM
25
20
15
10
5
0.8
0.6
0.4
0.2
0
0
1
2
3
0
2.5
4
POWER SUPPLY VOLTAGE [V]
BH76812FVM
VCC=3V
20
1
18
0.8
STANDBY CURRENT [uA]
CIRCUIT CURRENT [mA]
BH76812FVM
16
14
12
10
-50
0
50
0.2
Ta=25℃
BH76812FVM
50
25
25
0
-25
3.5
-25
0
50
TEMPERATURE [℃]
BH76812FVM
VCC=3V
VCC=3V
100
Fig. 21 Vout DC offset voltage
vs. Temperature
Fig. 20 Vout DC offset voltage
vs. Supply voltage
BH76812FVM
100
0
-50
-50
-50
5
0
50
TEMPERATURE [℃]
Fig. 19 Circuit Current (Standby) vs. Temperature
VOUT DC OFFSET [mV]
VOUT DC OFFSET [mV]
0.4
50
2.7
2.9
3.1
3.3
POWER SUPPLY VOLTAGE [V]
VCC=3V
0.6
-50
Fig. 18 Circuit current vs. Temperature
2.5
3.5
0
100
TEMPERATURE [℃]
BH76812FVM
2.7
2.9
3.1
3.3
POWER SUPPLY VOLTAGE [V]
Fig. 17 Circuit Current (Standby) vs. Supply Voltage
Fig. 16 Circuit current vs. Supply voltage
Ta=25℃
Ta=25℃
12.5
12.4
-5
12.3
-15
VOLTAGE GAIN [dB]
VOLTAGE GAIN [dB]
Ta=25℃
1
STANDBY CURRENT [uA]
CIRCUIT CURRENT [mA]
30
-25
-35
-45
-55
12.2
12.1
12
11.9
11.8
11.7
-65
11.6
-75
0.1
10
1
FREQUENCY [MHz]
11.5
2.5
100
Fig. 22 Frequency characteristic
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© 2009 ROHM Co., Ltd. All rights reserved.
2.7
2.9
3.1
3.3
POWER SUPPLY VOLTAGE [V]
3.5
Fig. 23 Voltage gain vs. Supply voltage
11/16
2009.03 - Rev.A
Technical Note
BH76806FVM, BH76809FVM, BH76812FVM, BH76816FVM
BH76812FVM
BH76812FVM
VCC=3V
1
12.4
0.8
FREQENCY RESPONSE1:Gf1[dB]
12.5
VOLTAGE GAIN [dB]
12.3
12.2
12.1
12
11.9
11.8
11.7
11.6
11.5
-50
0
50
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1
100
2.5
VCC=3V
BH76812FVM
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1
50
-3
-4
-5
-6
2.5
FREQUENCY RESPONSE4:Gf4[dB]
FREQUENCY RESPONSE2:Gf2[dB]
3.1
BH76812FVM
f=8MHz/100kHz
-2
-3
-4
-5
3.3
3.5
f=23.5MHz/100kHz
-45
-50
-55
-60
-65
-70
2.5
0
50
TEMPERATURE [℃]
Ta=25℃
-40
-6
2.7
2.9
3.1
3.3
3.5
POWER SUPPLY VOLTAGE:Vcc[V]
100
Fig. 28 Frequency response 2 vs. Temperature
BH76812FVM
2.9
Fig. 27 Frequency response 2 vs. Supply voltage
0
Fig.29 Frequency response 4 vs. Supply voltage
BH76812FVM
VCC=3V
7
-40
f=23.5MHz/100kHz
MAX OUTPUT VOLTAGE [Vpp]
FREQUENCY RESPONSE4:Gf4[dB]
2.7
POWER SUPPLY VOLTAGE: Vcc [V]
VCC=3V
BH76812FVM
Ta=25℃
-2
100
Fig. 26 Frequency response 1 vs. Temperature
-45
3.5
-1
TEMPERATURE[℃]
-50
3.3
f=8MHz/100kHz
FREQUENCY RESPONSE2:Gf2[dB]
FREQUENCY RESPONSE1:Gf1[dB]
f=4. 5MHz/100kHz
-1
3.1
0
0.6
0
2.9
Fig. 25 Frequency response 1 vs. Supply voltage
1
0.8
2.7
POWER SUPPLY VOLTAGE:Vcc[V]
Fig. 24 Voltage gain vs. Temperature
-50
f=4. 5MHz/100kHz
0.6
TEMPERATURE [℃]
BH76812FVM
Ta=25℃
-50
-55
-60
-65
Ta=25℃
6
5
4
3
2
1
0
-70
TEMPERATURE[℃
[Deg]
TEMPERATURE
]
2.7
2.9
3.1
3.3
POWER SUPPLY VOLTAGE [V]
Fig. 30 Frequency response 4 vs. Temperature
Fig. 31 Maximum output voltage level vs. Supply voltage
-50
0
50
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2.5
100
12/16
3.5
2009.03 - Rev.A
Technical Note
BH76806FVM, BH76809FVM, BH76812FVM, BH76816FVM
BH76812FVM
VCC=3V
5.8
5.6
5.4
5.2
5
4.8
4.6
4.4
2
1
6dB
9dB
12dB
16.5dB
0
-1
-2
-3
-1.5
4
0
50
100
TEMPERATURE[V]
Fig. 32 Maximum output level vs. Temperature
260
220
180
140
2.7
2.9
3.1
3.3
3.5
260
220
180
140
100
-50
BH76812FVM
Ta=25℃
0
CHARGEPUMP OUTPUT VOLTAGE [V]
0.5
0.0
-0.5
-1.0
-1.5
-2.0
-2.5
-3.0
-3.5
-4.0
-2.5
-3
0
10
20
30
LOAD CURRENT [mA]
40
Fig. 37 Charge pump load regulation
BH76812FVM
2.5
DIFFERENTIAL PHASE [Deg]
2.5
2
1.5
1
0.5
VCC=3V
2
1.5
1
0.5
0
-50
3.5
0
50
TEMPERATURE [℃]
100
Fig. 39 Differential phase vs. Temperature
Fig. 38 Differential phase vs. Supply voltage
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Ta=25℃
-2
3
© 2009 ROHM Co., Ltd. All rights reserved.
VCC=3V
-1.5
Ta=25℃
2.7
2.9
3.1
3.3
POWER SUPPLY VOLTAGE [V]
100
-1
3
0
2.5
50
-0.5
4.0
Fig. 36 Charge pump output voltage
vs. Supply voltage
BH76812FVM
0
Fig. 35 Charge pump oscillation frequency
vs. Temperature
1.0
1.0
2.0
3.0
POWER SUPPLY VOLTAGE [V]
VCC=3V
TEMPERATURE [℃]
Fig. 34 Charge pump oscillation frequency
vs. Supply voltage
0.0
1.5
300
POWER SUPPLY VOLTAGE [V]
BH76812FVM
-0.5
0.0
0.5
1.0
INPUT DC VOLTAGE [V]
BH76812FVM
Ta=25℃
300
100
2.5
-1.0
Fig. 33 Output DC voltage – Input DC voltage
CHARGEPUMP OSC FREQUENCY [KHz]
CHARGEPUMP OSC FREQUENCY [KHz]
BH76812FVM
CHARGEPUMP OUTPUT VOLTAGE [V]
Ta=25℃
4.2
-50
DIFFERENTIAL PHASE [Deg]
VCC=3V
3
OUTPUT DC VOLTAGE [V]
MAXIMUM OUTPUT LEVEL:Vomv[Vpp]
BH76812FVM
6
13/16
2009.03 - Rev.A
Technical Note
BH76806FVM, BH76809FVM, BH76812FVM, BH76816FVM
BH76812FVM
Ta=25℃
3
2.5
2.5
DIFFERENTIAL GAIN [%]
DIFFERENTIAL GAIN [%]
BH76812FVM
3
2
1.5
1
0.5
0
2.5
2.7
2.9
3.1
3.3
POWER SUPPLY VOLTAGE [V]
Fig. 40 Differential gain vs. Supply voltage
1
0.5
Ta=25℃
0
50
TEMPERATURE [℃]
100
VCC=3V
BH76812FVM
80
80
75
75
70
65
70
65
60
2.5
2.7
2.9
3.1
3.3
POWER SUPPLY VOLTAGE [V]
60
-50
3.5
BH76812FVM
0
50
100
TEMPERATURE [℃]
Fig.43 S/N(Y) vs. Temperature
Fig. 42 S/N(Y) vs. Supply Voltage
Ta=25℃
VCC=3V
BH76812FVM
80
CHROMA S/N (AM) [dB]
80
75
CHROMA S/N (AM) [dB]
1.5
Fig. 41 Differential gain vs. Temperature
Y S/N [dB]
Y S/N [dB]
BH76812FVM
2
0
-50
3.5
VCC=3V
70
65
60
2.5
2.7
2.9
3.1
3.3
POWER SUPPLY VOLTAGE [V]
70
65
60
3.5
-50
Fig. 44 S/N(C-AM) vs. Supply Voltage
BH76812FVM
75
0
50
TEMPERATURE [℃]
100
Fig. 45 S/N(C-AM) vs. Temperature
Ta=25℃
BH76812FVM
70
VCC=3V
70
66
64
CHROMA S/N (PM) [dB]
C SYSTEM PM S/N:SNcp[dB]
68
62
60
58
56
54
65
60
55
52
50
2.5
2.7
2.9
3.1
3.3
50
-50
3.5
POWER SUPPLY VOLTAGE: Vcc[V]
Fig. 46 S/N(C-PM) vs. Supply Voltage
www.rohm.com
© 2009 ROHM Co., Ltd. All rights reserved.
0
50
100
TEMPERATURE [℃]
Fig. 47 S/N(C-PM) vs. Temperature
14/16
2009.03 - Rev.A
BH76806FVM, BH76809FVM, BH76812FVM, BH76816FVM
BH76812FVM
Technical Note
VCC=3V Ta=25℃
CIRCUIT CURRENT [mA]
20
15
10
5
0
0.0
0.5
1.0
1.5
CTL TERMINAL VOLTAGE [V]
2.0
Fig. 48 Circuit current vs. CTL terminal voltage
●Cautions on use
1.
Numbers and data in entries are representative design values and are not guaranteed values of the items.
2.
Although ROHM is confident that the example application circuit reflects the best possible recommendations, be sure
to verify circuit characteristics for your particular application. Modification of constants for other externally connected
circuits may cause variations in both static and transient characteristics for external components as well as this Rohm
IC. Allow for sufficient margins when determining circuit constants.
3.
Absolute maximum ratings
Use of the IC in excess of absolute maximum ratings, such as the applied voltage or operating temperature range
(Topr), may result in IC damage. Assumptions should not be made regarding the state of the IC (short mode or
open mode) when such damage is suffered. A physical safety measure, such as a fuse, should be implemented
when using the IC at times where the absolute maximum ratings may be exceeded.
4.
Thermal design
Perform thermal design, in which there are adequate margins, by taking into account the permissible dissipation
(Pd) in actual states of use.
5.
Short circuit between terminals and erroneous mounting
Pay attention to the assembly direction of the ICs. Wrong mounting direction or shorts between terminals, GND, or other
components on the circuits, can damage the IC.
6.
Operation in strong electromagnetic field
Using the ICs in a strong electromagnetic field can cause operation malfunction.
7.
Wiring from the decoupling capacitor C2 to the IC should be kept as short as possible.
This capacitance value may have ripple effects on the IC, and may affect the S-N ratio. It is recommended to use
as large a decoupling capacitor as possible. (Recommendations: 3.3 µF, B characteristics, 6.3 V or higher)
8.
Target capacitor
It is recommended to use a ceramic capacitor with good temperature characteristics (B).
9.
The NVCC (7 pin) terminal generates a voltage that is used within the IC, so it should not be connected to a load
unless necessary. This capacitor (C7) has a large capacitance value with low negative voltage ripple.
10.
Capacitors C18 and C2 should be placed as close as possible to the IC. If the wire length to the capacitor is too
long, it can lead to switching noise. (Recommended C18: 1.0 µF; C2: 3.3 µF, B characteristics, 6.3 V or higher
maximum voltage)
11.
The HPF consists of input coupling capacitor C3 and 150 kΩ of the internal input.
Be sure to check for video signal sag before determining the C3 value.
The cut-off frequency fc can be calculated using the following formula.
fc = 1/(2π× C3 × 150 kΩ) (Recommendations: 1.0 µF, B characteristics, 6.3 V or higher maximum voltage)
12.
The output resistor R5 should be placed close to the IC.
13.
Improper mounting may damage the IC.
14.
A large current transition occurs in the power supply pin when the charge pump circuit is switched. If this affects
other ICs (via the power supply line), insert a resistor (approximately 10 Ω) in the VCC line to improve the power
supply's ripple effects. Although inserting a 10 Ω resistor lowers the voltage by about 0.2 V, this IC has a wide margin
for low-voltage operation, so dynamic range problems or other problems should not occur. (See Figures 12 to 14.)
www.rohm.com
© 2009 ROHM Co., Ltd. All rights reserved.
15/16
2009.03 - Rev.A
Technical Note
BH76806FVM, BH76809FVM, BH76812FVM, BH76816FVM
●Selection of order type
B
H
7
6
8
6
0
F
V
T
M
R
Tape and Reel
information
Part. No.
BH76806FVM
BH76809FVM
BH76812FVM
BH76816FVM
MSOP8
<Dimension>
<Tape and Reel information>
5
1
4
0.29 ± 0.15
0.6 ± 0.2
8
2.8 ± 0.1
4.0 ± 0.2
2.9 ± 0.1
0.9Max.
0.75 ± 0.05
0.08 ± 0.05
Embossed carrier tape
Quantity
3000pcs
Direction
of feed
TR
(Correct direction: 1pin of product should be at the upper left when you
hold reel on the left hand, and you pull out the tape on the right hand)
0.145 +0.05
−0.03
0.475
0.22
0.65
Tape
+0.05
−0.04
0.08 M
X X
X
X
X X X
0.08 S
X X
X
X
X X X
X X
X
X
X X X
1Pin
X X
X
X
X X X
X X
X
X
X X X
Direction of feed
Reel
(Unit:mm)
www.rohm.com
© 2009 ROHM Co., Ltd. All rights reserved.
※Orders are available in complete units only.
16/16
2009.03 - Rev.A
Notice
Notes
No copying or reproduction of this document, in part or in whole, is permitted without the
consent of ROHM Co.,Ltd.
The content specified herein is subject to change for improvement without notice.
The content specified herein is for the purpose of introducing ROHM's products (hereinafter
"Products"). If you wish to use any such Product, please be sure to refer to the specifications,
which can be obtained from ROHM upon request.
Examples of application circuits, circuit constants and any other information contained herein
illustrate the standard usage and operations of the Products. The peripheral conditions must
be taken into account when designing circuits for mass production.
Great care was taken in ensuring the accuracy of the information specified in this document.
However, should you incur any damage arising from any inaccuracy or misprint of such
information, ROHM shall bear no responsibility for such damage.
The technical information specified herein is intended only to show the typical functions of and
examples of application circuits for the Products. ROHM does not grant you, explicitly or
implicitly, any license to use or exercise intellectual property or other rights held by ROHM and
other parties. ROHM shall bear no responsibility whatsoever for any dispute arising from the
use of such technical information.
The Products specified in this document are intended to be used with general-use electronic
equipment or devices (such as audio visual equipment, office-automation equipment, communication devices, electronic appliances and amusement devices).
The Products specified in this document are not designed to be radiation tolerant.
While ROHM always makes efforts to enhance the quality and reliability of its Products, a
Product may fail or malfunction for a variety of reasons.
Please be sure to implement in your equipment using the Products safety measures to guard
against the possibility of physical injury, fire or any other damage caused in the event of the
failure of any Product, such as derating, redundancy, fire control and fail-safe designs. ROHM
shall bear no responsibility whatsoever for your use of any Product outside of the prescribed
scope or not in accordance with the instruction manual.
The Products are not designed or manufactured to be used with any equipment, device or
system which requires an extremely high level of reliability the failure or malfunction of which
may result in a direct threat to human life or create a risk of human injury (such as a medical
instrument, transportation equipment, aerospace machinery, nuclear-reactor controller,
fuel-controller or other safety device). ROHM shall bear no responsibility in any way for use of
any of the Products for the above special purposes. If a Product is intended to be used for any
such special purpose, please contact a ROHM sales representative before purchasing.
If you intend to export or ship overseas any Product or technology specified herein that may
be controlled under the Foreign Exchange and the Foreign Trade Law, you will be required to
obtain a license or permit under the Law.
Thank you for your accessing to ROHM product informations.
More detail product informations and catalogs are available, please contact us.
ROHM Customer Support System
http://www.rohm.com/contact/
www.rohm.com
© 2009 ROHM Co., Ltd. All rights reserved.
R0039A