Specifications |
| FAN4802LMY | Full Production | Green | $0.71 | SOIC | 16 | TAPE REEL | | Line 1: $Y (Fairchild logo)
&Z (Asm. Plant Code)
&2 (2-Digit Date Code)
&K Line 2: FAN4802L Line 3: MYK |
| FAN4802LNY | Full Production | Green | $0.71 | DIP | 16 | RAIL | | Line 1: $Y (Fairchild logo)
&Z (Asm. Plant Code)
&4 (4-Digit Date Code)
&K Line 2: FAN4802L Line 3: NYK |
| FAN4802MY | Full Production | Green | $0.71 | SOIC | 16 | TAPE REEL | | Line 1: $Y (Fairchild logo)
&Z (Asm. Plant Code)
&2 (2-Digit Date Code)
&K Line 2: FAN4802 Line 3: MYI |
| FAN4802NY | Full Production | Green | $0.71 | DIP | 16 | RAIL | | Line 1: $Y (Fairchild logo)
&Z (Asm. Plant Code)
&4 (4-Digit Date Code)
&K Line 2: FAN4802 Line 3: NYI |
* Fairchild 1,000 piece Budgetary Pricing
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| ** A sample button will appear if the part is available through Fairchild's on-line samples program. If there is no sample button, please contact a Fairchild distributor to obtain samples |
Package marking information for product FAN4802 is available. Click here for more information . |
DescriptionThe highly integrated FAN4800A/C and FAN4801/1S/2/2L 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 FAN4801/1S/2/2L have lower operation current that save power consumption in external devices. FAN4800A/C and FAN4801/1S/2/2L have accurate 49.9% maximum duty of PWM that makes the hold-up time longer. Specifically, the brownout protection and PFC soft-start functions are not in ML4800 and FAN4800.
To start evaluating FAN4800A/C, FAN4801/1S/2/2L for replacing existing FAN4800 and ML4800 boards, five things must be done before the fine-tuning procedure:
1. Change RAC resister from the old value to a higher resister: between 6MW to 8MW.
2. Change RT/CT pin from the existing values to RT=6.8KWand CT=1000pF to have fPFC=64KHz, fPWM=64KHz.
3. VRMS pin needs to be 1.224V at VIN=85 VAC for universal input application from line input from 85VAC to 270 VAC. Both poles for the Vrms of FAN4801/1S/2/2L don?t need to substantially slower than FAN4800; about 5 to 10 times.
4. At full load, the average VEA needs to ~4.5V and the ripple on the VEA needs to be less than 400mV.
5. Soft-Start pin, the soft-start current has been reduced to half from the FAN4800 capacitor.
FAN4802 Data Sheet
