FM2827 Shanghai Fudan Microelectronics Co., Ltd., FM2827 Datasheet - Page 4

• Manufacturer Part Number: FM2827
• Description: Fm2827 Power Factor Correction Controller
• Manufacturer: Shanghai Fudan Microelectronics Co., Ltd.

1.4.
1.5.
FM2827 Power Factor Correction Controller
Pin Description
Block Diagram
PIN
1
2
3
4
5
6
7
8
Symbol
EAOUT
MULT
GND
OUT
VCC
DET
INV
CS
Inverting input of the error amplifier. The output of the boost converter should
be resistively divided to 2.5V and connected to this pin.
The output of the error amplifier. A feedback compensation network is placed
between this pin and the INV pin.
Input to the multiplier stage. The full-wave rectified AC is divided to less than
3.8V and is connected to this pin.
Input to the PWM comparator. Current is sensed in the boost stage MOSFET
by a resistor in the source lead. An internal RC low pass filter has been
included to reject any high frequency noise present on the current waveform.
The zero current detector senses the inductor current by monitoring when the
boost inductor auxiliary winding voltage falls below 1.8V.
The ground potential of all the pins.
Gate driver output. A push pull output stage is able to drive the Power
MOSFET.
Supply voltage of driver and control circuits.
Ver 2.1
Description
Specification
4