STR-A6252 Datasheet – Flyback Switching Regulator – Allegro

Part Number : STR-A6252

Function : Universal-Input/15 W 50 kHz Flyback Switching Regulators

Package : DIP 8 type

Manufacturers : Allegro, Sanken

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STR-A6252 image

Description

The STR-A6251 and STR-A6252 are 50 kHz PWM topology (with ±5% frequency jittering for minimum EMI) regulators specifically designed to satisfy the requirements for increased integration and reliability in flyback converters. They incorporate a primary control and drive circuit with avalanche-rated power MOSFETs. The STR-A6252 features higher allowable switching current and lower on-resistance. The STR-A6251 is also available for 67 kHz operation.

Block Diagram

STR-A6252 datasheet pinout
Features

  1. 50 kHz PWM with ±5% Frequency Jittering Cost Reduction of EMI Noise Filtering
  2. Rugged 650 V Avalanche-Rated MOSFET, Simplified Surge Absorption, No VDSSDerating Required
  3. Choice of rDS(on)(2.8 Ωor 3.95 Ωmaximum)
  4. Auto-Burst Mode for Stand-By Operation or Light Loads Less Transformer Audible Noise
  5. Built-In Leading Edge Blanking
  6. Soft Start and Low Start-Up Current
  7. Start-Up Circuit Disabled in Operation

STR-A6252 Datasheet PDF Download