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LCDTV AC/DC Power range
20” LCD
TV
14” LCD
TV
26” LCD
TV
32” LCD
TV
37” LCD
TV
40” LCD
TV
Input Power
44 W
70W
140W
180W
195W
300W input LCD-TV SMPS Specifications
Wide Input voltage range: 90-265VAC
Multi Output Voltages (Vout):
Vout
Current
Remarks
24V
8A
ML4800/FAN4800(PFC+PWM) + FAN7382(AHB driver)
12V
5V
5VSTB
3A
2A
1A
FSCQ0765 with Sync rectification
FAN5234
FSDM311
Total output Power : 243W
1
285W
AHB TOPOLOGY
•
Asymmetric control half bridge converter
VO 
2
D(1  D)Vin
n
2
24V/8A circuit
300W FQPF18N50V2*2/FCP11N60*2
200W FQP13N50C*2/FCP9N60*2
BD1
F1
L
300W ISL9R1560G2/RHRP1560
200W RHRP860
380V
D5SB60
HS1
470n
4 4
1
2
1N4937
D13
3
F2
T2
3
L7
L8
250V 2A
2
330k
R38
2
C33
450V/220U
R40
R39 10
C30
470UF 35V
C25A
GL
270k
2
13
18V
1
F2
3
4
250V 1A
RELAY SPDT
D29
1N4148
D26
1
2
D27
R44
2.2k
ZD5
18V
ZD6
18V
300W 0.33/200W 0.47
R49 6.2k
J2
2
4
5
C32
0.1U 100V
220P
3
R45
10k
LS1
R50
82K
0.1U 100V
3
1
R48
D25 1N4937
C31
1
C34
1
R42
2.2k
3
C29
470UF 35V
R41 10
ZD4
A1015
11
Q6
Q5
Q7 R43
R47
18V
D20 1N4148
330k
1
1
D22 1N4937
ZD7
R37
10k
2
Q4 C37A
0.1u
R34
51 3W
C28
103/1000V
1
D19
1N4148
1N4148
2
C1815
GPFC
1
CON1
1
GH
R35
3
Q3
1
3
GND
J1
2
3
3
R3610
D18
20V VCC
9
2
250Vac/22n
250Vac/0.47u
2.5OHM/5A
3
C23A
N
300W 24V/8A
1
6
Q2
R33 10
D17 1N4148
2
C23
C26
470n
200W 24V/6A
L9
C25
2
2M
3
R30
2
R32
L5
+ 1
1
1
C22
0.1u
D12
1
2
250V 6A
D11
2
C21
3
1
D24
C36
CON1
C37 470p
1N4002 1N4002
C39
R54
330k
C40
450V/22U
Vref _7.5V
2n2
R55 10k
C41
4700P/400V
C54
100n
2n2
R56
R57
D30 1N4937
180k
R60
82K
R59
330k
T3
C42
0.22u
C50
180k
L11 Bead
1u 50V
5V/3A STB
D33
1N4937
Vcc
2
Vfb
IEAO
VERO
16
2
Iac
Vfb
15
C51
10V/220U
10V/220U
R65
R66 180k
C52
3
Isense
Vref
14
4
Vrms
Vcc
13
C60
33U 50V
C60
R76 100 10U 50V
C56
1u
D37
1N4937
ZD12
18V
C49
C58
68n
R73
100n
GPFC
Q11
5
SS
PFC OUT
12
6
Vdc
PWM OUT
11
ZD10B
15V
3
C57
22UF 35V
2
7
3
6
4
5
220n
GH
GL
380V R79
240K
IC4
FAN7382
DRIVER:FAN7382
R70
D36
1N5819
1U 50V
12k
C61
100n
8
A1015
C1815
C62
R67 10
C59
C56A
0.1u
Q10
1
R69
0
R72
100
1N4937
R68
91k
6,7,8
1
1
R64
Vref _7.5V
GND
C44
D32 1N4148
C48
D34 MBR1645
Drain
D31
Q9 C1815
R62
22K/3W
5
C43 47n
R63
U4
STR
R58 180k
33
R61
270k
C45
220P
C55
10U
R71
7
RAMP1
GND
8
RAMP2
DC Ilimit
R74
1K
10
R75
D38
1N4148
R83
390
R80
240K
C63
1nF
9
C64
470pF
R81
IC2
Q12
R86
R82
C1815
ZD10A
ZD10
1K
R84
82
1n
6.2K
R89
1K
C67
10K
470nF
ML4800/FAN4800
R90
10K
1
4
H11A817A
R91 10K
IC6
C68A
C68
51K
R92
3
R93
U5
KA431
R87
1
2
3
32
1
R85
27K
3
R88
1K
817A
2
0.1uF
0.1uF
R95
2
1K
U6
KA431
R96
5.6K
0
R98
3K
H11A817C
5V/STB
Q13 C1815
17V VCC OUT
R99
4
R100
jumper
1N4937
1K
1
20V VCC IN
IC7
3
C70
22UF 50V
ZD14
18V
C68B
R94
10u
470
2
D39
R104
1
Q14
A1015
2
Q15
ON/OFF
C1815
3
FSDM311
1
4
C66
IC5
R107
D41
1N4148
D41A
R108
Q18
3
C1815
C73
OLP
1N4148
R110
R105
4K7
12V/3A,5V/2A and 5V/1A STB circuit
T1
380V
FSCQ0765
C1
1000P
R5 1K
R1
56K/3W
VCC
FDP3672
D1
1N4937
U1
Drain
1
GND
2
12V/4A
C2
2200UF 16V
C3
220p/1KV
Vcc
Vfb
L1
0
1T
ZD1
18V
3
R7
30
C5
22UF 35V
D3
1N4937
M1
R8
4
Q1
C1815
D5
1N4937
R11
SYNC
C2
2200UF 16V
R9
R10
10
C6
560pF
100T
820
C7
1n
D4
1N4148
0
R12
680
FDS6982AS/FDS6912A/FDS6986
L3
BEAD
IC1
R14
820
0
R16
ZD2
R17
20K
R18
2K2
817A
2
R21
C12
0.1uF
C13
0
3
2.2V
R15
NC
1
C11
100u
1K2
1
0.1uF
1K
R19
20K
R20
1 Vin
FPWM 16
2 PGOOD
BOOT 15
3 ENABLE
HDRV 14
10K R23
R22
10K
NC
0
C14 0.15uF
10K
R24
5,6
4
2
C10
10n
4
2.2V
C9
2200UF 35V
R13
2K2
ZD2
3
OLP
U3
KA431
5.1K
C15
0.1uF
L4
R25 56K
4 ILIM
SW 13
5 VOUT
ISEN 12
6 VSEN
Vcc
5V/3A
3
0
R26
100
10uH C16
220UF 6.3V
D9
MBR0520L
7 SS
LDRV 10
8 AGND
PGND 9
1uF
0
0
C18
100nF
R27
12K
1
C19
0.1uF
7,8
2
11
C17
0
R29
R28
2K7
2K
0
C20
U2
ZD3
100UF 35V
5V1
4
0
FAN5234
0
Full load measurement
VAC[V]
90
110
160
220
265
Pin[W]
285
280
275
273
271
Vout
23.85V/8A,12.5V/3A,4.96V/2A,4.95V/1A
Pout[W]
243.18
Power
Factor
0.99
0.99
0.98
0.96
0.95
Efficiency
[%]
85.4
86.9
88.5
89.1
89.8
Load condition:24V/8A,12V/3A,5V/2A,5VSTB/1A.
Board size:170mmx215mm, Height:35mm
5
Attachment:
1.ML4800/FAN4800
2.FAN7382
3.FAN5234
4.FSDM311
5.FSCQ0765
Rev 1.1
ML4800: Average Current Sense
Vin
L1
AC
In
Isense
+
–
RSENSE
CLOCK
PWM
IGainmod
Error Amp
7
D2
V OUT
ML4800/FAN4800 Continuous Mode
3
2.5
Near Vin Peak @ 120V RMS
2
1.5
2
Inductor Current
Inductor (Line) Current (A)
2.5
IL
1.5
1
1
0.5
0.5
0
0
• Peak to RMS ratio lower: Lower I2R losses
• Ripple current: Lower core losses
• Lower EMI: Smaller input filter
• Requires very fast boost diode
8
ML4800/FAN4800
A High Performance PFC
Average Current,CCM
ML4800/ML4824
9
ML4800/FAN4800
A More Detail Circuit…
10
An Example: ML4800
11
ML4800/FAN4800
Gain Modulator---(I)
•
Gain Modulator:
Generate the reference current wave-form.

IAC Input:
rectified AC input sine wave
Decides the “Shape” of the current Reference

VEAO Input:
Vo
Decides the “Size” of the current Reference
to regulate the Vo.

VRMS Input:
RMS AC line voltage
Feed-forward the 1 / Vin(rms)2 to speed up the
response & maintain a constant loop gain.
12
ML4800/FAN4800
Gain Modulator---(II)
Vin
L1
AC
In
Isense
+
D2
V OUT
–
RSENSE
CLOCK
PWM
IGainmod
Error Amp
Vin↑2Vin, then Isense↑2Isense,=>Pin↑4Pin => Vout ↑↑. So it is necessary for a RMS AC
line voltage feed forward to make Isense ↓0.5Isense while Vin↑2Vin.
13
ML4800/FAN4800
Gain Modulator---(III)
•IGAINMOD = GAIN * IAC
= K * (VEAO- 0.625 ) * IAC , K is in units of V-1

K is a function of VRMS-2 . Left is the K/ VRMS curve
Average line voltage compensation with
brownout control
* the K of the curve is in units of m V-1
14
•
ML4800/FAN4800
Gain Modulator---(IV)
Continuous mode PFC controllers
modify the gain error in the control
loop
•
For voltages in the range 85V to
220V, the gain curve compensates
for the Vrms dependency
•
Without this compensation, the
gain of the control loop would be
directly proportional to Vrms2
•
For voltages below 85V, the gain
curve provides brownout protection
Modulator compensates for effect of loop gain
increase with VIN(RMS)2 with piecewise linear curve
15
ML4800/FAN4800:
“Slew Enhanced” Error Amp Improves
Transient Response
VFB
Vref
V OUT
To
Multiplier
•Special shaped, non-linear gain error
amplifiers are used.
Such that under steady-state operating conditions the
transconductance of the error amplifier is at a local minimum.
 Lower gain to get higher PF
when in Steady State.
 Higher gain to get fast transient
response
16
ML4800/FAN4800
VFB (Pin 15) Tri-Fault Detect
•
Should VFB go too low (* Pin 15 < 0.5 V ), too high (* Pin 15 > 2.75
V), or open, the internal Tri-Fault Detect circuit will senses the error
and terminates the PFC output driver.
17
ML4800/FAN4800
Switching Frequency Setting(Pin7)
ML4824-1:fpwm=fpfc
R38 (*=RT)
ML4824-2: fpwm=2fpfc
1
ML4800:fpwm=fpfc
2
fpfc ≈ 1/ (0.51* RT CT )
3
4
5
6
7
IEAO
VDC
IAC
VFB
Isens
Isense
VREF
Vrms
VRMS
Vcc
SS
16
15
14
13
12
PFC OUT
11
VDC PWM OUT
RAMP1
GND 10
8 RAMP2 DCILMIT 9
C18 (*=CT)
18
ML4800/FAN4800
Vin OK Comparator
•
The Vin OK Comparator monitors the DC output of the PFC and
inhibit the PWM if the voltage on the VFB is less than 2.45 V. Once
this voltage reaches over 2.45 V, the soft-start of the PWM section
begins.
19
ML4800/FAN4800
PWM Soft Start (Pin 5) --- (I)
• Chose
Css = tDELAY * (25 uA/1.25V)
1
2
3
4
Where Css is the soft start Cap.
tDELAY is the desired Startup delay.

5
6
7
C19 (*Css)
IEAO
VDC
IAC
VFB
Isens
Isense
VREF
Vrms
VRMS
Vcc
SS
SS
15
14
13
12
PFC OUT
11
VDC PWM OUT
RAMP1
GND 10
9
8
RAMP2 DCILMIT
During the tDELAY only the PFC works. PWM does not work.
After then, the duty of the PWM O/P begins to (gradually)
expand to its normal condition.
20
16
ML4800/FAN4800
RAMP 2 (Pin 8) --- (II)
Current Mode
R16
R29
1
2
3
4
5
IEAO
VDC
IAC
VFB
Isens
Isense
VREF
Vrms
VRMS
Vcc
SS
16
R30
R32
14
13
R44
R23
12
PFC OUT
6
VDC PWM OUT11
7
GND 10
RAMP1
C22
15
R21//R22
R40
R31
C23
9
8
RAMP2 DCILMIT
R33
C11
C28
21
ML4800/FAN4800
RAMP 2 (Pin 8) --- (III)
Voltage Mode (1)--- No Feed-forward
Rt1
R16
R29
1
2
3
4
5
IEAO
VDC
IAC
VFB
Isens
Isense
VREF
Vrms
VRMS
Vcc
16
C22
15
R32
14
13
R44
R23
12
PFC OUT
SS
6
VDC PWM OUT11
7
GND 10
RAMP1
R30
R31
R21//R22
R40
C23
9
8
RAMP2 DCILMIT
Ct1
R33
C11
C28
22
ML4800/FAN4800
RAMP 2 (Pin 8) --- (IV)
Voltage Mode (2)--- with Feed-forward Ramp
Rt1
R16
1
2
3
4
5
6
7
IEAO
VDC
IAC
VFB
Isens
Isense
VREF
Vrms
VRMS
Vcc
16
C22
15
14
R32
13
12
PFC OUT
SS
R30
R23
11
VDC PWM OUT
RAMP1
R21//R22
GND 10
R40
9
8
RAMP2 DCILMIT
Ct1
R33
C11
C28
23
ML4800/FAN4800
DC ILIMIT (Pin 9)
•the DC ILIMIT input is used for output
stage overcurrent protection.
1
2
3
4
5
6
7
IEAO
VDC
IAC
VFB
Isens
Isense
VREF
Vrms
VRMS
Vcc
SS
16
15
14
13
12
PFC OUT
R23
11
VDC PWM OUT
RAMP1
R21//R22
GND 10
9
8
RAMP2 DCILMIT
C28
24
Q3
ML4800/FAN4800
PFC/PWM Combo Controllers
• Combine: Leading edge PFC and trailing edge PWM in one package
PFC turn off, then PWM turn on, at the same instant to minimize
the momentary “no-load” period, thus lowering ripple voltage
generated by the switching action.
PWM switch
PFC switch
25
FAN4800
Project
(Part #)
Family
FAN4800
PFC IC
Description
Same die with CM6800
Application
PC, Server
Block Diagram
Current
Package
16DIP
16SOP
Code D
ER sample
Code R
Code S
-
2005-04-27
2005-05-18
2005-06-15
Description
The FAN4800 is a controllers for power factor
corrected, switched mode power supplies. Power
Factor Correction (PFC) enables the use of smaller,
lower cost bulk storage capacitors, reduces power line
loading, and reduces stress on the components of a
switched mode power supply.
Features
 Average Current Mode
 23V BiCMOS Process
 Vcc OVP, Brown out, UVLO, Soft start
 Low Power Detect Comparator
 More Precise Spec. for OVP, OCP, Tri-Fault
 Low Power Consumption : 100uA, 3mA
 16-pin Solution
26
FAN4800 vs. ML4800, ML4824 :
Spec. Comparison
Parameter
FAN4800
ML4800
ML4824
Max. Supply Voltage
20V
18V
13.5V
Zener Voltage
Vcc OVP
17V
13.5V
Start-up Current
100uA
200uA
700uA
Operating Current
3mA
5.5mA
16mA
Low Power Detector
O
X
X
Tri-fault Protection
O
O
X
PFC ILimit
-1.0V±10%
-1.0V±10%
-1.0V±15%
OVP
2.77V
2.75V
2.7V
Vin OK
2.45V
2.45V
2.5V
Soft Start Current
20uA
25uA
50uA
Peak Drive Current
±1.0A
±1.0A
±0.5A
Gain Modulation Resistance
3.5k
3.5k
1.6k
Operating Temp.
-40~125C
ML4800CX: 0~70C
ML4800IX: -40~85C
ML4824CX: 0~70C
ML4824IX: -40~85C
27
FSC HVIC Application Circuit
General Purpose
28
-
FSC HVIC Solution
•
•
•
Fairchild Semiconductor.
•
FAN7360(250/500mA,600V)
•
Half bridge 
•
FAN7380(60/130mA),7382(250/500mA,600V),
•
7385(2/2A,600V),7386(3/3A,600V),FAN7387(6/6A,600V)
•
3-phase 
•
FAN7390(250/500mA,600V)
•
High Side only 
Self oscillation 
29
Power Solutions – Switching Regulators
for Point of Load Applications
Vin
New Product
24V
12V
FAN5182 (Controller 1-3f) + FAN5009 (Driver)
FAN
FAN5234/6 FAN
5240
2105*
1f
2f
5V
Legend
FAN6520A
Integrated Switcher
(Controller+Driver+MOSFET)
FAN
FAN FAN
FAN
2011
5307 2001*
2003*
2012
Integrated Controller
(Controller+Driver)
3.3V
Stand-alone Controller
(Controller+ External Driver)
New Products
0.3A
1A
3A
* -- Sampling Now
Iout
5A
20A
30
40A
60A
100A
120A 140A
FSDM311
 Features
BCDMOS controller + Strong Avalanche CFET
Built in Start up Circuit
Internal soft-start circuit
Peak current limit
New 8DIP PKG for wide creepage
 Target Application
FSDM311
Max 8watt Charger with universal input range
Max 20watt auxiliary P/S for PC with 220V input
31
GND
DRAIN
Vcc
DRAIN
Vfb
DRAIN
NC
Vstr
8DIP
Block Diagram of FSDM311
Vstr
5
Built-in Start up
Drain
6, 7, 8
UVLO < 7V
Vcc 2
Voltage
Ref.
UVLO
Internal
Bias
UVLO > 9V
Voltage Mode
Control
5uA
400uA
Vck
SenseFET
DRIVER
OSC
PWM
S
Vfb 3
Q
R
S/S
10mS
LEB
Soft Start
Reset
OCP
Protection
4.5V
Rsense
OLP
OVP
Min. 21V
S
Q
Peak Current
Limit
R
TSD
His 40
Vth
/4
Auto Restart
32
4
NC
1 GND
Features and Advantages of FSCQseries
Green FPSTM
•
Features
– - Optimized for Quasi-resonant converter (Low EMI and High Efficiency)
– - Fully avalanche rated and 100% tested SenseFET
– - Pulse-by-pulse current limiting
– - Improved reliability through various protection functions
TO-220F-5L
• : Over voltage, Over load, Over current, Thermal shutdown
– - Advanced Burst operation for low power consumption in standby (<1W)
- - Internal Soft start function (20ms)
- - Extended Quasi-resonant operation for wide operation range
- - Reduced startup and operating currents
•
Advantages
– - Reduced board space (simple & compact circuit design)
– - Decreased assembly time and field failure rate  Enhanced productivity
1. Introduction to FPS
33
FSCQ-series Functional Block Diagram
QRC Control
Sync
5
Vcc
3
Drain
1
+
Threshold
Soft start
Quasi-resonant
(QR) switching
controller
-
+
fs
-
Burst Mode Operation
4.6V/2.6V : Normal QR
3.0V/1.8V : Extended QR
Burst mode
Controller
VBurst
Normal operation
Vref
Ibufb
IFB
Vcc
Auxiliary
Vref
OSC
Main bias
Normal
operation
Vref
Internal
bias
Ib
Idelay
FB
Vcc good
Burst Switching
Vref
9V/15V
SenseFET
PWM
4
2.5R
OLP
S
Q
R
Q
Gate
driver
R
LEB
600ns
Current Mode Control
VSD
Sync
S
Vovp
Vcc good
AOCP
Q
AOCP
Q
R
OVP
S
Q
Q
R
Auto Restart Mode
Latch Mode
34
2 GND
TSD
TSD
Power Reset
Vocp
FSCQ-series pin description
35
FSCQ
Normal Quasi-Resonant Switching at heavy load
 Advantages
- Reduced switching noise (Low EMI)
- Improved efficiency
- Removed RCD snubber
 Limitations
- Intermittent switching at light load due to relatively large LEB time
36
FSCQ
Extended Quasi-Resonant Switching at light load
Switching
frequency
Extended QR Switching
90kHz
Normal QR Switching
45kHz
Output power
 Advantages
- Guarantee stable operation over wide load range
- Improve efficiency at light load condition
37
FSCQ
Advanced Soft-Start
85V input
265V input
• - Internal soft start (20ms)
• - For a fast output build up, offset is introduced in the soft start
38
FSCQ
Advanced Burst Operation
Vo2
Vo2_min
-
Drop output voltage to below
half (any level) to minimize the
loss caused by leakage current
in the high voltage output
-
Reduce the effective switching
frequency to minimize
switching loss
-
Reduce the FPS operating
current in the burst operation
Vfb
Vth
Iop
Iop
Inop
Iopbu
Vds
Picture
On
Picture
Off
Picture
On
Burst Mode
39
FSCQ
Advanced Burst Operation
Vi=85Vac
Vi=265Vac
1. Vds
2. Vcc
3. Vfb
4. Id
40
FSCQ/KA5Q Lists
Function
Device
Vdmax
(V)
Ipeak
(A)
Pin(max)(1)
85-265VAC
Protection Option
PKG
Fopr
(KHz)
Rds(on)
Max ()
OLP
OCL
OVP
TSD
High Power Quasi-Resonant Converter Applications
Color TV
KA5Q0565RT
650
3.5
70
QRC
2.2
YES
YES
YES
YES
TO-220F-5L
KA5Q0740RT
400
5.0
100
QRC
1.1
YES
YES
YES
YES
TO-220F-5L
KA5Q0765RTH
650
5.0
100
QRC
1.6
YES
YES
YES
YES
TO-220F-5L
KA5Q12656RTH
650
6.0
150
QRC
0.9
YES
YES
YES
YES
TO-220F-5L
KA5Q1265RFH
650
8.0
200
QRC
0.9
YES
YES
YES
YES
TO-3PF-5L
KA5Q1565RF
650
11.5
270
QRC
0.65
YES
YES
YES
YES
TO-3PF-5L
FSCQ0765RT
650
5.0
100
QRC
1.6
YES
YES
YES
YES
TO-220F-5L
FSCQ1265RT
650
7.0
150
QRC
0.9
YES
YES
YES
YES
TO-220F-5L
FSCQ1565RT
650
8.0
200
QRC
0.65
YES
YES
YES
YES
TO-220F-5L
Protection Option – OLP(Over Load Protection), OCL(Over Current Latch), OVP(Over Voltage Protection), TSD(Thermal Shutdown)
(1) Open Frame
Pin(max) Test Condition : Flyback Converter, Discontinuous Current Mode, Dmax=0.5, Vin(dc)=100V
41