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