1 LCDTV AC/DC Power range Input Power 14” LCD TV 44 W 70W 140W 180W 195W 285W 20” LCD TV 26” LCD TV 32” LCD TV 37” LCD TV 40” LCD TV Wide Input voltage range: VAC Multi Output Voltages (Vout): VoutCurrentRemarks 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

3 24V/8A circuit

4 12V/3A,5V/2A and 5V/1A STB circuit

5 Full load measurement VAC[V] Pin[W] Vout23.85V/8A,12.5V/3A,4.96V/2A,4.95V/1A Pout[W] Power Factor Efficiency [%] Load condition:24V/8A,12V/3A,5V/2A,5VSTB/1A. Board size:170mmx215mm, Height:35mm

Attachment: 1.ML4800/FAN FAN FAN FSDM311 5.FSCQ0765 Rev 1.1

7 ML4800: Average Current Sense Vin Isense I Gainmod

8 ML4800/FAN4800 Continuous Mode Peak to RMS ratio lower: Lower I 2 R losses Ripple current: Lower core losses Lower EMI: Smaller input filter Requires very fast boost diode

9 ML4800/FAN4800 A High Performance PFC Average 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.  I AC Input: rectified AC input sine wave Decides the “Shape” of the current Reference  V EAO Input: Vo Decides the “Size” of the current Reference to regulate the Vo.  V RMS 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) Vin Isense I Gainmod 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 V RMS -2. Left is the K/ V RMS curve * the K of the curve is in units of m V -1 I GAINMOD = GAIN * I AC = K * (V EAO ) * I AC, 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 Vrms 2 For voltages below 85V, the gain curve provides brownout protection Modulator compensates for effect of loop gain increase with V IN(RMS) 2 with piecewise linear curve

16 ML4800/FAN4800: “Slew Enhanced” Error Amp Improves Transient Response V FB 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 V FB (Pin 15) Tri-Fault Detect Should V FB go too low (* Pin 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: f pwm= f pfc ML4824-2: f pwm=2 f pfc ML4800: f pwm= f pfc f pfc ≈ 1/ (0.51* R T C T )

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 V FB 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 = t DELAY * (25 uA/1.25V) Where Css is the soft start Cap. t DELAY is the desired Start- up delay.  During the t DELAY 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.

21 ML4800/FAN4800 RAMP 2 (Pin 8) --- (II) Current Mode

22 ML4800/FAN4800 RAMP 2 (Pin 8) --- (III) Voltage Mode (1)--- No Feed-forward

23 ML4800/FAN4800 RAMP 2 (Pin 8) --- (IV) Voltage Mode (2)--- with Feed-forward Ramp

24 ML4800/FAN4800 DC I LIMIT (Pin 9) 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 #) FamilyDescriptionApplicationPackage Current Code DER sampleCode RCode S FAN4800PFC ICSame die with CM6800PC, Server 16DIP 16SOP Block DiagramDescription Features 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.  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 ParameterFAN4800ML4800ML4824 Max. Supply Voltage20V18V13.5V Zener VoltageVcc OVP17V13.5V Start-up Current100uA200uA700uA Operating Current3mA5.5mA16mA Low Power DetectorOXX Tri-fault ProtectionOOX PFC ILimit-1.0V±10% -1.0V±15% OVP2.77V2.75V2.7V Vin OK2.45V 2.5V Soft Start Current20uA25uA50uA Peak Drive Current±1.0A ±0.5A Gain Modulation Resistance 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

28 FSC HVIC Application Circuit - General Purpose

29 FSC HVIC Solution 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 FAN  FAN5234/6 1  Power Solutions – Switching Regulators for Point of Load Applications 3.3V 5V 12V 24V V in I out 0.3A1A3A 5A20A40A60A100A120A140A FAN 5307 FAN 2001* FAN 2003* FAN 2105* FAN5182 (Controller 1-3  ) + FAN5009 (Driver) Integrated Switcher (Controller+Driver+MOSFET ) Integrated Controller (Controller+Driver ) Stand-alone Controller (Controller+ External Driver ) Legend FAN 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 VstrNC GND Vcc Vfb 8DIP

32 2 UVLO Voltage Ref. UVLO < 7V Vstr Vcc Internal Bias UVLO > 9V Rsense OCP S/S 10mS 6, 7, 8 OSC S R Q S R Q LEB OLP Reset / 4 DRIVER 5uA400uA Vck Vth SenseFET Drain GND Vfb 3 1 NC 5 PWM 4.5V OVP Min. 21V 4 TSD His 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 FPS TM 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 QRC Control Burst Mode Operation TSD OLP OVP AOCP Latch Mode Current Mode Control Auto Restart Mode SenseFET

35 FSCQ-series pin description

36 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

37 FSCQ Extended Quasi-Resonant Switching at light load Advantages -Guarantee stable operation over wide load range -Improve efficiency at light load condition

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

40 FSCQ Advanced Burst Operation Vi=85VacVi=265Vac 1. Vds 2. Vcc 3. Vfb 4. Id

41 Device FunctionProtection Option PKG Vdmax (V) Ipeak (A) Pin(max) (1) VAC Fopr (KHz) Rds(on) Max (  ) OLPOCLOVPTSD High Power Quasi-Resonant Converter Applications Color TV KA5Q0565RT QRC2.2YES TO-220F-5L KA5Q0740RT QRC1.1YES TO-220F-5L KA5Q0765RTH QRC1.6YES TO-220F-5L KA5Q12656RTH QRC0.9YES TO-220F-5L KA5Q1265RFH QRC0.9YES TO-3PF-5L KA5Q1565RF QRC0.65YES TO-3PF-5L FSCQ0765RT QRC1.6YES TO-220F-5L FSCQ1265RT QRC0.9YES TO-220F-5L FSCQ1565RT QRC0.65YES 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