FAN4802S Datasheet | onsemi

DATA SHEET .onsemi. PFC/PWM Controller bination FAN4800AS/CS/01S/2S Description The highly integrated FAN4800AS/CS/01S/02S parts are specially designed for power supplies that consist of boost PFC and PWM. They require very few external ponents to achieve versatile protections / pensation. They are available in 16- pin DIP and SOP packages. The PWM can be used in either current or voltage mode. In voltage mode, feed- forward from the PFC output bus can reduce the secondary output ripple. pared with older productions, ML4800 and FAN4800, FAN4800AS/CS/01S/02S have lower operation current that saves power consumption in external devices. FAN4800AS/CS/01S/02S have accurate 49.9% maximum duty of PWM that makes the hold- up time longer. Brownout protection and PFC soft- start functions available in this series are not available in ML4800 and FAN4800. To evaluate FAN4800AS/CS/01S/02S for replacing existing FAN4800 and ML4800 boards, five things must be pleted before the fine- tuning procedure: SOIC- 16 CASE 751BG 16 1 PDIP- 16 CASE 648- 08 MARKING DIAGRAM 16 XXXXXXXXXXXX XXXXXXXXXXXX AWLYYWWG XXXXX = Specific Device Code = Assembly Location WL = Wafer Lot = Year WW = Work Week = Pb- Free Package ORDERING INFORMATION See detailed ordering and shipping information on page 16 of this data sheet. 1. Change RAC resister from the old value to a higher resister: between 6 MW to 8 MW. 2. Change RT/CT pin from the existing values to RT = 6.8k W and CT = 1000 p F to have f PFC = 64 k Hz and f PWM = 64 k Hz. 3. The VRMS pin needs to be 1.224 V at VIN = 85 VAC for universal input application from line input from 85 VAC to 270 VAC. 4. At full load, the average VVEA needs to be ~4.5 V and the ripple of VVEA needs to be less than 400 m V. 5. For the Soft- Start pin, the soft- start current has been reduced to half the FAN4800 capacitor. There are two differences from FAN4800A/C/01/02 to FAN4800AS/CS/01S/02S: 1. Under- voltage protection debounce time is...