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iW1709 Datasheet Off-Line Digital Green-Mode Quasi-Resonant PWM Controller

Manufacturer: Dialog Semiconductor (now Renesas)

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General Description

The iW1709 is a high performance AC/DC power supply controller that uses digital control technology to build peak current mode PWM flyback power supplies.

The device directly drives a power BJT and operates in quasi-resonant mode to provide high efficiency and key built-in protection

Overview

iW1709 Off-Line Digital Green-Mode Quasi-Resonant PWM Controller 1.

Key Features

  • while minimizing the external component count, simplifying EMI design, and lowering the total bill of material cost. The iW1709 features a distinctive soft-start scheme, which allows for fast and yet smooth start-up with both small and large capacitive loads. The iW1709 removes the need for a secondary feedback circuit while achieving excellent line and load regulation. It also eliminates the need for loop compensation components while maintaining stability over all operating conditions. The pu.

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