FAN4800ASMY ON Semiconductor

DATA SHEET www.onsemi.com PFC/PWM Controller Combination 16 1 FAN4800AS/CS/01S/2S SOIC16 PDIP16 CASE 751BG CASE 64808 Description The highly integrated FAN4800AS/CS/01S/02S parts are specially designed for power supplies that consist of boost PFC and PWM. They MARKING DIAGRAM require very few external components to achieve versatile 16 protections/ compensation. They are available in 16 pin DIP XXXXXXXXXXXX and SOP packages. XXXXXXXXXXXX The PWM can be used in either current or voltage mode. In voltage AWLYYWWG mode, feed forward from the PFC output bus can reduce 1 the secondary output ripple. XXXXX = Specific Device Code Compared with older productions, ML4800 and FAN4800, A = Assembly Location FAN4800AS/CS/01S/02S have lower operation current that saves WL = Wafer Lot YY = Year power consumption in external devices. FAN4800AS/CS/01S/02S WW = Work Week have accurate 49.9% maximum duty of PWM that makes the holdup G = PbFree Package time longer. Brownout protection and PFC softstart functions available in this series are not available in ML4800 and FAN4800. ORDERINGORDERING INFORMA INFORMATIONTION To evaluate FAN4800AS/CS/01S/02S for replacing existing See detailed ordering and shipping information on page 16 of FAN4800 and ML4800 boards, five things must be completed before this data sheet. the finetuning procedure: 1. Change R resister from the old value to a higher resister: AC PFC Feedback OpenLoop Protection between 6 M to 8 M CyclebyCycle Current Limiting 2. Change RT/CT pin from the existing values to R = 6.8kW T for PFC/PWM and C = 1000 pF to have f = 64 kHz and f = 64 kHz. T PFC PWM Poweron Sequence Control and SoftStart 3. The VRMS pin needs to be 1.224 V at V = 85 V IN AC Brownout Protection for universal input application from line input from 85 V to 270 V Interleaved PFC/PWM Switching AC AC. 4. At full load, the average V needs to be ~4.5 V VEA Improved Efficiency at Light Load and the ripple of V needs to be less than 400 mV. VEA f = 4 f = 4 f RTCT PFC PWM 5. For the SoftStart pin, the softstart current has been reduced for FAN4800AS/01S to half the FAN4800 capacitor. f = 4 f = 2 f RTCT PFC PWM There are two differences from FAN4800A/C/01/02 to for FAN4800CS/02S FAN4800AS/CS/01S/02S: These are PbFree Devices 1. Undervoltage protection debounce time is extended Applications to one second. Desktop PC Power Supply 2. PWM gate clamp voltage is raised to 19 V. Internet Server Power Supply Features LCD TV, Monitor Power Supply PintoPin Compatible with ML4800 and FAN4800 and CM6800 UPS and CM6800A Battery Charger PWM Configurable for Current Mode or Feedforward VoltageMode DC Motor Power Supply Operation Monitor Power Supply Internally Synchronized LeadingEdge PFC and TrailingEdge Telecom System Power Supply PWM in One IC Distributed Power Low Operating Current Innovative SwitchingCharge Multiplier Divider Related Resources AN8027 FAN480X PFC+PWM Combi- AverageCurrent Mode for InputCurrent Shaping nation Controller Application PFC OverVoltage and UnderVoltage Protections Semiconductor Components Industries, LLC, 2010 1 Publication Order Number:Publication Order Number: October, 2021 Rev. 3 FFAN4801S/DAN4801S/DFAN4800AS/CS/01S/2S Application Diagram IEA VEA IAC FBPFC ISENSE VREF VDD VRMS VDD SS OPFC FBPWM OPWM RT/CT GND RAMP ILIMIT VREF Figure 1. Typical Application, Current Mode www.onsemi.com 2