Part Number: STR-A6252
Function: Universal-Input/15 W 50 kHz Flyback Switching Regulators
Package: DIP 8 type
Manufacturer: Allegro, Sanken
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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
Features
- 50 kHz PWM with ±5% Frequency Jittering Cost Reduction of EMI Noise Filtering
- Rugged 650 V Avalanche-Rated MOSFET, Simplified Surge Absorption, No VDSSDerating Required
- Choice of rDS(on)(2.8 Ωor 3.95 Ωmaximum)
- Auto-Burst Mode for Stand-By Operation or Light Loads Less Transformer Audible Noise
- Built-In Leading Edge Blanking
- Soft Start and Low Start-Up Current
- Start-Up Circuit Disabled in Operation
