October 2013
?2010 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FAN7930C " Rev. 1.0.2
FAN7930C
Critical Conduction Mode PFC Controller
Features
? PFC-Ready Signal
? V
IN
-Absent Detection
? Maximum Switching Frequency Limitation
? Internal Soft-Start and Startup without Overshoot
? Internal Total Harmonic Distortion (THD) Optimizer
? Precise Adjustable Output Over-Voltage Protection
? Open-Feedback Protection and Disable Function
? Zero-Current Detector (ZCD)
? 150 ?/SPAN>s Internal Startup Timer
? MOSFET Over-Current Protection (OCP)
? Under-Voltage Lockout with 3.5 V Hysteresis
? Low Startup and Operating Current
? Totem-Pole Output with High State Clamp
? +500/-800 mA Peak Gate Drive Current
? 8-Pin, Small Outline Package (SOP)
Applications
? Adapter
? Ballast
? LCD TV, CRT TV
? SMPS
Description
The FAN7930C is an active power factor correction
(PFC) controller for boost PFC applications that operate
in critical conduction mode (CRM). It uses a voltage-
mode PWM that compares an internal ramp signal with
the error amplifier output to generate a MOSFET turn-off
signal. Because the voltage-mode CRM PFC controller
does not need rectified AC line voltage information, it
saves the power loss of an input voltage-sensing network
necessary for a current-mode CRM PFC controller.
FAN7930C provides over-voltage protection (OVP),
open-feedback protection, over-current protection
(OCP), input-voltage-absent detection, and under-
voltage lockout protection (UVLO). The PFC-ready pin
can be used to trigger other power stages when PFC
output voltage reaches the proper level with hysteresis.
The FAN7930C can be disabled if the INV pin voltage is
lower than 0.45 V and the operating current decreases
to a very low level. Using a new variable on-time control
method, total harmonic distortion (THD) is lower than in
conventional CRM boost PFC ICs.
Related Resources
AN-8035 Design Consideration for Boundary
Conduction Mode PFC Using FAN7930
Ordering Information
Part Number
Operating
Temperature Range
Top Mark
Package
Packing
Method
FAN7930CMX_G
-40 to +125癈
FAN7930C 8-Lead, Small Outline Package (SOP)
Tape & Reel
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功能描述:功率因数校正 IC Critical Conduction Mode PFC Controller RoHS:否 制造商:Fairchild Semiconductor 开关频率:300 KHz 最大功率耗散: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel
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制造商:Fairchild Semiconductor Corporation 功能描述:IC PFC CTLR CRITICAL CONF 8-SOIC 制造商:Fairchild Semiconductor Corporation 功能描述:Power Factor Correction - PFC Critical Conduction Mode PFC Controller 制造商:Fairchild Semiconductor Corporation 功能描述:Critical Conduction Mode PFC Controller
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