1
LCDTV AC/DC Power range
Input Power
14” LCD TV
44 W 70W 140W 180W 195W 285W
20” LCDTV
26” LCD TV
32” LCD TV
37” LCD TV
40” LCDTV
Wide Input voltage range: 90-265VAC
Multi Output Voltages (Vout):
Vout Current Remarks
24V
12V
5V
5VSTB
8A
3A
2A
1A
ML4800/FAN4800(PFC+PWM) + FAN7382(AHB driver)
FSCQ0765 with Sync rectification
FAN5234
FSDM311
Total output Power : 243W
300W input LCD-TV SMPS Specifications
2
AHB TOPOLOGY• Asymmetric control half bridge converter
inO VDDn
V )1(2
3
24V/8A circuit
Q18
C1815
L5
Q13 C1815
R5082K
R95
1K
R9251K
C25A
C49
F2
250V 2A
R98 3K
LS1
RELAY SPDT
35
412
R35
330k
R80
240K
D13
300W ISL9R1560G2/RHRP1560
300W 0.33/200W 0.47
R83390
R41 10
R66 180k
F2
250V 1A
L8
Q14
A1015
3
2
1
C48
1u 50V
R81
300W 24V/8A
200W FQP13N50C*2/FCP9N60*2
GL
R76 100
R67 10
IC6
H11A817A 12
43
R1054K7
C23
250Vac/22n
12
C6010U 50V
D26
1N4002
R86
1K
R8527K
200W RHRP860
R47
- +
BD1
D5SB60
2
1
3
4
2
1
3
4
C67
470nF
R64
91k
R48
R32
2.5OHM/5A
GND
380V
Q6
2
1
3
R65
C56A0.1u
C37 470p
R49 6.2k
R73
12k
5V/STB
Vref_7.5V
Vref_7.5V
GL
C64470pF
C5210V/220U
D41
1N4148
R30
2M
C22
0.1u
C21
470n
R54330k
C5722UF 35V R79
240K
17V VCC OUT
C26470n
ZD1418V
C73
U6KA4312
3
1
R70
C54100n
ZD4 18V
R34
51 3W
R38
330k
R4510k
Q11
C1815
C62
100n
J1
CON1
1
IC5
817A
12
43
ZD10R8482
R58 180k
L7
R6082K
T2
1
9
11
6
13
3
4
R9010K
C45220P
380V
Vcc
Vfb
GND
Drain
STR
U4
FSDM311
3
6,7,8
2
5
1C58
68n
U5KA4312
3
1
D31
1N4937
D331N4937
C33450V/220U
C7022UF 50V
Q2
2
1
3
Q7
A1015
3
2
1C40450V/22U
R442.2k
12
3
IC4FAN7382
8
7
6
5
1
2
3
4
200W 24V/6A
ZD10B15V
D22 1N4937
D32 1N4148Q9 C1815
C61100n
D17 1N4148
C39 2n2
D191N4148
R891K
C561u
R110
R422.2k
C68
0.1uF
Q10A1015
ZD1218V
ML4800/FAN4800
0
R56
180k
C34
220P
D291N4148
R100jumper
GPFCD371N4937
ZD7 18V
Q51
23
R59330k
R104
R881K
C30470UF 35V
R63
180k
12
3
R91 10K
N
D361N5819
L11 Bead
C66
1n
Q4C1815
J2
CON1
1
C23A
250Vac/0.47u
12
D27
1N4002
R68
ZD618V
T3
C41 2n2
C59
1U 50V
R107
DRIVER:FAN7382
Q3
300W FQPF18N50V2*2/FCP11N60*2
1
23
OLP
HS1
GH
R40
270k
R108
R69
D41A
1N4148
ON/OFF
L9
D25 1N4937
D20 1N4148
R55 10k
ZD10A
C32
0.1U 100V
R72100
R57
33
GPFC
R36 10
D39
1N4937
F1
250V 6A
20V VCC IN
C50
20V VCC
C5110V/220U
D121
23
C36
4700P/400V
C43 47nC420.22u
D381N4148
R87
6.2K
R43
R94
470
R39 10
ZD518V
C44
220n
D11
1N4937
L
C25
Vrms
GND
SS
DC Ilimit
Vdc
Iac
RAMP2
RAMP1
Vcc
PFC OUT
PWM OUT
Isense
Vfb
VERO
Vref
IEAO
IC2
9
10
11
12
13
14
15
161
2
3
4
5
6
7
8
5V/3A STBD34 MBR1645
R3710k
Q15
C1815
0
Q12
C1815
R99 1K
C68B
10u
R741K
C29470UF 35V
R6222K/3W
GH
C68A
0.1uF
D18
1N4148C37A0.1u
R82
C5510U
R93
10K
R71
R965.6K
C631nF
C31
0.1U 100V
IC7
H11A817C
12
43
D24
12
3
R61270k
C28103/1000V
12
D30 1N4937
C6033U 50V
R33 10
R75
4
12V/3A,5V/2A and 5V/1A STB circuit
0
R8
U3KA4312
3
1
R14820
ZD3
5V1
D41N4148
R25
10K
Vcc
Vfb
GND
Drain
SYNC
U1
FSCQ0765
10
2
4
1
3
100T
C20
100UF 35V
5V/3A
0
ZD2
2.2V
3
R11
820
5,6
380V
4
C22200UF 16V
7,8
R12680
C11100u
0
0
0
R9
12V/4A
VCC
C19
1uF
ZD2
2.2V
C150.1uF
R282K7
R132K2
0
L1
1T
R21
1K2
C13
0.1uF
C92200UF 35V
R16 1K
L3
BEAD
1
R182K2
Vcc
PGND
HDRV
BOOT
AGND
PGOOD
VOUT
Vin
ENABLE
ILIM
ISEN
VSEN
SW
LDRVSS
FPWM
U2
FAN5234
7
2
4
1
3
16
15
5
14
13
8
6 11
10
12
9
R26
56K
100
R19
10K
C71n
0
R1720K
0
C6560pF
0
R23
20K
R5 1K
0
R730
C120.1uF
C522UF 35V
D51N4937
Q1C1815
2 C18100nF
L4
10uH
C1010n
M1
FDP3672
0
D31N4937
C3220p/1KV
C16220UF 6.3V
R29
2K
R156K/3W
C11000P
C14 0.15uF
D11N4937
R2712K
0
ZD118V
IC1
817A
12
43
R24
5.1K
D9MBR0520L
C17
0.1uF
T1
FDS6982AS/FDS6912A/FDS6986
R20
NC
R15NC
R2210K
OLP
C22200UF 16V
R10
5
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
Attachment:1.ML4800/FAN48002.FAN7382 3.FAN5234 4.FSDM3115.FSCQ0765
Rev 1.1
7
ML4800: Average Current Sense
ACIn
V O U TL1 D 2
R SEN SE
–
+
Error Am p
P W M
C LO C K
Vin
Isense
IGainmod
8
ML4800/FAN4800 Continuous Mode
• Peak to RMS ratio lower: Lower I2R losses
• Ripple current: Lower core losses
• Lower EMI: Smaller input filter
• Requires very fast boost diode
0
0.5
1
1.5
2
2.5
3
Ind
uct
or
(Lin
e) C
urr
ent
(A)
0
0.5
1
1.5
2
2.5
Ind
uct
or
Cu
rren
t IL
Near Vin Peak @ 120V RMS
9
ML4800/FAN4800 A High Performance PFCAverage Current,CCM
ML4800/ML4824
10
ML4800/FAN4800 A More Detail Circuit…
11
An Example: ML4800
12
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.
13
ML4800/FAN4800 Gain Modulator---(II)
ACIn
V O U TL1 D 2
R SEN SE
–
+
Error Am p
P W M
C LO C K
Vin
Isense
IGainmod
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.
14
ML4800/FAN4800 Gain Modulator---(III)
K is a function of VRMS-2 . Left is the K/ VRMS curve
* the K of the curve is in units of m V-1
•IGAINMOD = GAIN * IAC
= K * (VEAO- 0.625 ) * IAC , K is in units of V-1
Average line voltage compensation with brownout control
15
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
16
ML4800/FAN4800:“Slew Enhanced” Error Amp Improves
Transient Response
V O U T
Vre
f
T oM ultip lier
VFB
•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
17
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.
18
ML4800/FAN4800 Switching Frequency Setting(Pin7)
ML4824-1:fpwm=fpfc
ML4824-2: fpwm=2fpfc
ML4800:fpwm=fpfc
fpfc ≈ 1/ (0.51* RT CT )
IAC
Isens
Vrms
SS
VDC
RAMP1
RAMP2
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
IEAO VDC
VFB
VREF
Vcc
PFC OUT
PWM OUT
GND
DCI LMIT
IAC
Isense
VRMS
SS
VDC
RAMP1
RAMP2
R38 (*=RT)
C18 (*=CT)
19
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.
20
ML4800/FAN4800 PWM Soft Start (Pin 5) --- (I)
• Chose
Css = tDELAY * (25 uA/1.25V)
Where Css is the soft start Cap.
tDELAY is the desired Start-
up delay.
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.
IAC
Isens
Vrms
SS
VDC
RAMP1
RAMP2
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
IEAO VDC
VFB
VREF
Vcc
PFC OUT
PWM OUT
GND
DCI LMIT
IAC
Isense
VRMS
SS
VDC
RAMP1
RAMP2C19 (*Css)
21
ML4800/FAN4800 RAMP 2 (Pin 8) --- (II)Current Mode
IAC
Isens
Vrms
SS
VDC
RAMP1
RAMP2
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
IEAO VDC
VFB
VREF
Vcc
PFC OUT
PWM OUT
GND
DCI LMIT
IAC
Isense
VRMS
SS
VDC
RAMP1
RAMP2
R16
C11C28
R23
R21//R22 R40
R30C22
R29
C23
R31
R44
R32
R33
22
ML4800/FAN4800 RAMP 2 (Pin 8) --- (III)Voltage Mode (1)--- No Feed-forward
IAC
Isens
Vrms
SS
VDC
RAMP1
RAMP2
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
IEAO VDC
VFB
VREF
Vcc
PFC OUT
PWM OUT
GND
DCI LMIT
IAC
Isense
VRMS
SS
VDC
RAMP1
RAMP2
R16
C11 C28
R23
R21//R22 R40
R30C22
R29
C23
R31
R44
R32
R33
Rt1
Ct1
23
ML4800/FAN4800 RAMP 2 (Pin 8) --- (IV)
Voltage Mode (2)--- with Feed-forward Ramp
IAC
Isens
Vrms
SS
VDC
RAMP1
RAMP2
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
IEAO VDC
VFB
VREF
Vcc
PFC OUT
PWM OUT
GND
DCILMIT
IAC
Isense
VRMS
SS
VDC
RAMP1
RAMP2
R16
C11 C28
R23
R21//R22 R40
R30C22
R32
R33
Rt1
Ct1
24
ML4800/FAN4800 DC ILIMIT (Pin 9)
IAC
Isens
Vrms
SS
VDC
RAMP1
RAMP2
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
IEAO VDC
VFB
VREF
Vcc
PFC OUT
PWM OUT
GND
DCI LMIT
IAC
Isense
VRMS
SS
VDC
RAMP1
RAMP2
R21//R22
R23 Q3
C28
•the DC ILIMIT input is used for output stage overcurrent protection.
25
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.
PFC switch
PWM switch
26
Project
(Part #)Family Description Application Package
Current
Code D ER sample Code R Code S
FAN4800 PFC IC Same die with CM6800 PC, Server16DIP
16SOP- 2005-04-27 2005-05-18 2005-06-15
Block Diagram Description
Features
The FAN4800 is a controllers for power factor corrected, switched mode power supplies. PowerFactor 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.
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
FAN4800
27
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. -40~125CML4800CX: 0~70CML4800IX: -40~85C
ML4824CX: 0~70CML4824IX: -40~85C
28
FSC HVIC Application Circuit - General Purpose
29
FSC HVIC Solution
• Fairchild Semiconductor.Fairchild Semiconductor.•
• High Side only • 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)
• Self oscillation
30
FAN5240
2
FAN5234/61
Power Solutions – Switching Regulators for Point of Load Applications
3.3V
5V
12V
24V
Vin
Iout0.3A 1A 3A 5A 20A 40A 60A 100A 120A 140A
FAN5307
FAN2001*
FAN2003*
FAN2105*
FAN5182 (Controller 1-3) + FAN5009 (Driver)
Integrated Switcher(Controller+Driver+MOSFET)
Integrated Controller(Controller+Driver)
Stand-alone Controller(Controller+ External Driver)
Legend
FAN20112012
FAN6520A
New Product
New Products
* -- Sampling Now
31
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
DRAIN
DRAIN
DRAIN
VstrNC
GND
Vcc
Vfb
8DIP
32
2
UVLOVoltage
Ref.
UVLO < 7V
Vstr
Vcc
InternalBias
UVLO > 9V
RsenseOCP
S/S10mS
6, 7, 8
OSC
S
R
Q
S
R
Q
LEB
OLPReset
/ 4
DRIVER5uA 400uA
Vck
Vth
SenseFET
Drain
GND
Vfb 3
1NC
5
PWM
4.5V
OVP
Min. 21V
4
TSDHis 40
Built-in Start up
Peak Current Limit
Soft Start
Voltage Mode Control
Protection
Auto Restart
Block Diagram of FSDM311
1. Introduction to FPS 33
Green FPSGreen FPSTMTM
Features and Advantages of FSCQ-series
• 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
• : 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
TO-220F-5L
34
FSCQ-series Functional Block Diagram
9V/15V
3 1
2
4
AuxiliaryVref Main bias
S
Q
Q
R
OSC
Vcc
Vref
Idelay
IFB
VSD
TSD
Vovp
Sync
Vocp
S
Q
Q
R
R
2.5R
Vcc good
Vcc Drain
FB
GND
AOCP
Gatedriver
Vcc good
LEB600ns
PWM
Soft start
Internalbias
Normaloperation
VBurst
Vref
Ib
Vref
Ibufb
Burst modeController
Normal operation Burst Switching
5Sync
Threshold
Quasi-resonant(QR) switching
controller
+
-
+
-
S
Q
Q
R
Power Reset
4.6V/2.6V : Normal QR3.0V/1.8V : Extended QR
fs
QRC Control
Burst Mode Operation
TSD
OLP
OVP
AOCP
Latch Mode
Current Mode Control
Auto Restart Mode
SenseFET
35
FSCQ-series pin description
36
FSCQNormal 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
37
FSCQExtended Quasi-Resonant Switching at light load
Advantages- Guarantee stable operation over wide load range- Improve efficiency at light load condition
Output power
Switchingfrequency
Normal QR Switching
Extended QR Switching
90kHz
45kHz
38
FSCQ Advanced Soft-Start
• - Internal soft start (20ms)• - For a fast output build up, offset is introduced in the soft start
85V input 265V input
39
FSCQ Advanced Burst Operation
- 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
Vo2
Vfb
Iop
Vds
Inop
Vth
Vo2_min
Iop
PictureOn
PictureOff
Iopbu
PictureOn
Burst Mode
40
FSCQ Advanced Burst Operation
Vi=85Vac Vi=265Vac
1. Vds
2. Vcc
3. Vfb
4. Id
41
Device
Function Protection Option
PKGVdmax
(V)
Ipeak
(A)
Pin(max)(1)
85-265VAC
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
FSCQ/KA5Q Lists