FAN4800A

Datasheet Buy

PFC + PWM Controller Combo

General Description

The highly integrated FAN4800A/C and FAN4801/02/02L are specially designed for power supplies that consist of boost PFC and PWM. They require very few external components to achieve versatile protections / compensation. 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. Compared with older productions, ML4800 and FAN4800, FAN4800A/C and FAN4801/02/02L have lower operation current that save power consumption in external devices. FAN4800A/C and FAN4801/02/2L have accurate 49.9% maximum duty of PWM that makes the hold-up time longer. Brownout protection and PFC soft-start functions are not in ML4800 and FAN4800. To evaluate FAN4800A/C, FAN4801/02/02L for replacing existing FAN4800 and ML4800 boards, five things must be done before the fine-tuning procedure: 1. Change R_AC resister from the old value to a higher resister: between 6MΩ to 8MΩ. 2. Change RT/CT pin from the existing values to R_T=6.8KΩand C_T=1000pF to have f_PFC=64KHz, f_PWM=64KHz. 3. VRMS pin needs to be 1.224V at V_IN=85 V_AC for universal input application from line input from 85V_AC to 270 V_AC. Both poles for the V_rms of FAN4801/02/02L don’t need to substantially slower than FAN4800; about 5 to 10 times. 4. At full load, the average V_EA needs to ~4.5V and the ripple on the V_EA needs to be less than 400mV. 5. Soft-Start pin, the soft-start current has been reduced to half from the FAN4800 capacitor.

Product Status/Pricing/Packing

Fairchild 1,000 piece Budgetary Pricing. *
If there is no sample button displayed at the top of the page, please contact one of the Fairchild distributors or your local sales office to obtain samples.
Top mark packaging information for product FAN4800A is available. **

Product	Product Status	Eco Status	*Pricing	Package Type	Leads	Packing Method	Package Drawing	**Package Marking Convention	RoHS IPC1752	RoHS/REACH/JIG Certificate of Compliance
FAN4800AMY	Not recommended for new design	Green as of Jan 2009		SOIC	16	TAPE REEL		Line 1:$Y (Fairchild logo) &Z (Asm. Plant Code) &2 (2-Digit Date Code) &K Line 2:FAN4800A Line 3:MYG
FAN4800ANY	Not recommended for new design	Green as of Jan 2009		MDIP 16-LEAD	16	RAIL		Line 1:$Y (Fairchild logo) &Z (Asm. Plant Code) &4 (4-Digit Date Code) &K Line 2:FAN4800A Line 3:NYG