FAN6921MLMY Ver la hoja de datos (PDF) - Fairchild Semiconductor

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Fabricante

FAN6921MLMY

Integrated Critical Mode PFC/Quasi-Resonant Current Mode PWM Controller

Fairchild Semiconductor 

Marking Information

16

ZXYTT

FAN6921FO

TPM

1

- Fairchild Logo

Z - Plant Code

X - Year Code (1 Digit for SOP, 2 Digits for DIP)

Y - Week Code (1 Digit for SOP, 2 Digits for DIP)

TT – DIe-Run Code

F - Frequency (M=Low, H=High Level)

O - OLP Mode (L=Latch, R=Recovery)

T - Package Type (N=DIP, M=SOP)

P – Y=Green Package

M - Manufacture Flow Code

Figure 3. Marking Diagram

Pin Configuration

Figure 4. Pin Configuration

Pin Definitions

Pin # Name Description

RANGE pin’s impedance changes according to VIN pin voltage level. When the input voltage

1 RANGE detected by the VIN pin is lower than a threshold voltage, it sets to high impedance; whereas it

sets to low impedance if input voltage is high level.

Output pin of the error amplifier. It is a transconductance type error amplifier for PFC output

2

COMP

voltage feedback. Proprietary multi-vector current is built-in to this amplifier; therefore, the

compensation for the PFC voltage feedback loop allows a simple compensation circuit between

this pin and GND.

3

INV

Inverting input of the error amplifier. This pin is used to receive PFC voltage level by a voltage

divider and provides PFC output over- and under-voltage protections.

Input to the PFC over-current protection comparator that provides cycle-by-cycle current limiting

4 CSPFC protection. When the sensed voltage across the PFC current-sensing resistor reaches the internal

threshold (0.6 typical), the PFC switch is turned off to activate cycle-by-cycle current limiting.

© 2010 Fairchild Semiconductor Corporation

FAN6921ML • Rev. 1.0.1

4

www.fairchildsemi.com

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