STR-W6750 - Off-Line Quasi-Resonant Switching Regulators

Allegro MicroSystems

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Datasheet Details

Part number	STR-W6750
Manufacturer	Allegro MicroSystems
File Size	385.81 KB
Description	Off-Line Quasi-Resonant Switching Regulators
Datasheet	STR-W6750_AllegroMicroSystems.pdf

STR-W6750 Product details

Description

www.DataSheet4U.net Series STR-W6750 Off-Line Quasi-Resonant Switching Regulators INTRODUCTION TERMINAL FUNCTIONS VCC (Pin 4) Start-up circuit The start-up circuit detects the VCC pin voltage (pin 4), and makes the control IC start and stop operation.The power supply of the control IC (VCC pin input) employs a circuit as shown in Figure 1. At start-up, C3 is charged through a startup resistor R2. The R2 value needs to be set for more than the hold current of the latch circuit (140 µA max.) an

Features

Blocking (or intermittent) oscillation operation by reducing output voltage in the standby mode. In addition to the standard quasi-resonant operation, a bottom-skip function is available for increased efficiency from light to medium load. Soft-start operation at start-up. Reduced switching noise (compared to conventional PWM hard-switching solution) with a step-drive function. Built-in avalanche-energy-guaranteed power MOSFET (to simplify surge-absorption circuit; no VDSS derating is required).

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Published: Jul 14, 2011 |