Description

The highly integrated FAN6747 PWM controller provides several features to enhance the performance of flyback converters. To minimize standby power consumption, a proprietary green-mode function provides off-time modulation to decrease the switching frequency with load condition.

Features

High-Voltage Startup

AC-Line Brownout Protection by HV Pin

Constant Output Power Limit by HV Pin (Full AC-Line Range)

Built-in 8ms Soft-Start Function

Two-Level Over-Current Protection (OCP) with 220ms Debounce

Short-Circuit Protection (SCP) with 15ms Debounce as Output Short

Peak-Current Mode Operation with Cycle-by-Cycle Current Limiting

Low Startup Current: 30µA

Low Operating Current: 1.7mA

Over-Temperature Protection (OTP) with an External Negative-Temperature-Coefficient (NTC)

Thermistor

PWM Frequency Decreasing at Green-Mode

VDDOver-Voltage Protection (OVP)

Internal Latch Circuit for OVP, OTP, SCP, and OCP

Applications

General-purpose switch-mode power supplies and flyback power converters, including:

Power Adapters

SMPS with Peak-Current Output, such as for

Printers, Scanners, Motor Drivers

AC/DC NB Adapters

Open-Frame SMPS