FAN7930B datasheet(1/22 Pages) ONSEMI

Part #	FAN7930B

Description	Critical Conduction Mode PFC Controller

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Publication Order Number:

September-2017, Rev. 2

FAN7930BMX-G/D

FAN7930B

Critical Conduction Mode PFC Controller

Features

 Additional OVP Detection Pin

 V

IN-Absent Detection

 Maximum Sw itching Frequency Limitation

 Internal Soft-Start and Startup w ithout Overshoot

 Internal Total Harmonic Distortion (THD) Optimizer

 Precise Adjustable Output Over-Voltage Protection

 Open-Feedback Protection and Disable Function

 Zero Current Detector (ZCD)

 150 μs Internal Startup Timer

 MOSFET Over-Current Protection (OCP)

 Under-Voltage Lockout w ith 3.5 V Hysteresis

 Low Startup and Operating Current

 Totem-Pole Output w ith High State Clamp

 +500/-800 mA Peak Gate Drive Current

 8-Pin, Small-Outline Package (SOP)

Applications

 Adapter

 Ballast

 LCD TV, CRT TV

 SMPS

Ordering Information

Part Number

Operating

Temperature Range

Top Mark

Package

Packing

Method

FAN7930BMX-G

-40 to +125°C

FAN7930BG

8-Lead, Small-Outline Package (SOP)

Tape & Reel

Description

The FA N7930 B is an active pow er factor correction

( PFC)

controller

for

boost

PFC

applications

that

operate in critical conduction mode ( CRM). It uses a

voltage- mode PWM that c ompares an internal ramp

signal w ith the error amplifier output to gener ate a

MOSFET turn-off signal. Because the voltage- mode

CRM PFC controller does not need rectified A C line

voltage infor mation, it saves the pow er loss of an input

voltage sensing netw ork necessary for a current- mode

CRM PFC controller.

FA N7930B provides

over-voltage

protection

(OV P),

open-feedback

protection,

over-current

protection

(OCP),

input-voltage-absent

detection,

and

under-

voltage lockout protection ( UVLO). The additional OV

P pin can be used to shut dow n the boost pow er

stage w hen output voltage exceeds OV P level due

to the resistors that are connected at INV pin are

damaged. The FAN7930B can be disabled if the INV

pin voltage is low er than 0.45 V and the operating

current decreases to a very low level. Us ing a new

variable

on-time

control

method,

total

har monic

distortion (THD) is low er than in conventional CRM

boost PFC ICs.

Related Resources

http://www.onsemi.com/pub/Collateral/AN-8035.pdf.pdf

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