低成本，绿色模式PWM控制器，用于反激式转换器 Low-Cost, Green-Mode PWM Controller for Flyback Converters
Description
This highly integrated PWM controller provides several enhancements designed to meet the low standby-power
needs of low-power SMPS. To minimize standby power consumption, a proprietary green-mode function
provides off-time modulation to linearly decrease the switching frequency under light-load conditions. This
green-mode function enables the power supply to meet even strict power conservation requirements.
Features
Green-Mode PWM
Supports the “Blue Angel” Eco Standard
Low Start-up Current: 9µA
Low Operating Current: 3mA
Leading-Edge Blanking
Constant Output Power Limit
Universal Input
Built-in Synchronized Slope Compensation
Current Mode Operation
Cycle-by-cycle Current Limiting
Under-Voltage Lockout UVLO
Programmable PWM Frequency with Frequency Hopping
VDDOver-Voltage Protection Latch off
Gate Output Voltage Clamped at 17V
Low Cost
Few External Components Required
Small SOT-26 Package
Applications
Power Adaptors
Open-Frame SMPS