FAN4800IMX

低启动电流PFC / PWM控制器套装 Low Start-Up Current PFC/PWM Controller Combos

Description

The FAN4800 is a controller for power-factor-corrected, switched-mode power supplies. Power Factor Correction PFC allows the use of smaller, lower-cost bulk capacitors, reduces power line loading and stress on the switching FETs, and results in a power supply that fully complies with IEC-1000-3-2 specifications. Intended as a BiCMOS version of the industry-standard ML4800, the

FAN4800 includes circuits for the implementation of leading edge, average current, boost-type power factor correction, and a trailing-edge Pulse Width Modulator PWM. A gate driver with 1A capabilities minimizes the need for external driver circuits. Low-power require ments improve efficiency and reduce component costs. 

Features

„Low start-up current 100µA typical

„Low operating current 2.5mA typical

„Low total harmonic distortion, high power factor

„Pin-compatible upgrade for the ML4800

„Average current, continuousor discontinuous boost, leading-edge PFC

„Slew rate enhanced transconductance error amplifier for ultra-fast PFC response

„Internally synchronized leading edge PFC and trailing edge PWM

„Reduction of ripple current in the storage capacitor between the PFC and PWM sections

„PWM configurable for current-mode or voltage-mode operation

„Additional folded-back current limit for PWM section

„20V BiCMOS process

„VINOK guaranteed turn-on PWM at 2.25V

„VCCOVP comparator, low-power detect comparator

„Current-fed gain modulator for improved noise immunity

„Brownout control, over-voltage protection, UVLO, soft-start, and reference OK

„Available in 16-DIP, 16-SOIC wide packages

Applications

„Desktop PC Power Supply

„Internet Server Power Supply

„Uninterruptible Power Supply UPS

„Battery Charger

„DC Motor Power Supply

„Monitor Power Supply

„Telecom System Power Supply

„Distributed Power