This is one of the switching regulator types.
Part Number: STRW6251
Function: PWM Switching Regulator
Package: TO-220 type
Manufacturer: Sanken, Allegro
See the preview image and the PDF file for more information.
Images:
General specification
The STRW6251 series are current-mode PWM ICs that incorporate controller chips. These devices are manufactured using a proprietary high-voltage BCD process, and avalancheguaranteed MOSFETs. These elements allow power supply systems designs that are highly reliable and simple, with fewer peripheral components. These ICs also provide Auto-Burst mode operation, which lowers input power requirements at light loads, and improves efficiency over the entire load range and universal-input range.
STRW6251 Pinout
Features
1. Overcurrent protection (OCP) with ac input voltage compensation function; no additional peripheral circuits required—minimizes dependency of OCP on ac input
2. Overload protection (OLP) with integrated timer reduces power stress (temperature rise) at overload condition, requires no peripheral components
Applicatons include:
1. TV set top box
2. LCD PC monitor, LCD TV
3. Printer, scanner
4. General consumer, PC, and industrial applications requiring SMPS power supply with standby mode
Official Homepage: https://www.semicon.sanken-ele.co.jp/ctrl/en/product/detail/STR-W6251D/