Switching archives - Page 4 of 44

Description

The STR-W6753 is a quasi-resonant regulator specifically designed to satisfy the requirements for increased integration and reliability in switch-mode power supplies. It incorporates a primary control and drive circuit with an avalanche-rated power MOSFET. The regulator exhibits only low-level high-frequency EMI noise because of soft switching of the MOSFET close to ground (bottom point). A bottom-skip function minimizes an increase of operational frequency during light loads to improve system efficiency over the entire load range.

Block Diagram

Part Number: DMS-78XXSR

Function: Outputs High-Efficiency Switching Regulators with LM78XX Pinouts

Package: 3 Pin PCB Type

Manufacturer: DATEL Data Acquisition products

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DMS-78XXSR datasheet

Description

DATEL’s 7805SR (5V output), 7812SR (12V output) and 7803SR (3.3V output) step-down switching regulators are modern drop-in replacements for older, ineffi cient, LM7805 and LM7812 linear regulators. The 78XXSR’s are pin- and size compatible with industry-standard TO-220 SIP packages.

A 260kHz switching frequency provides for effi ciencies as high as 95%. Full-load (up to 0.5A) operation from 9V, 12V, 24V, or 36V supplies at ambient temperatures up to +70°C requires no heat sinks, no temperature derating, no forced-air cooling, and no external capacitors.

Pinout

DMS-78XXSR regulator

Features

1. 3.3V/0.5A, 5V/0.5A or 12V/0.4A outputs; Pin and size-compatible
with LM7805 & LM7812 regulators
2. Up to 95% effi ciency – no heat sinks or thermal derating required
3. Built-in filter capacitors – no external components required
4. Can be used with unregulated dc supplies

Other data sheets are available within the file: 7803SR, 7803SRH, 7805SR, 7805SRH, 7812SR

Switching

STR-W6753 Datasheet – Quasi-Resonant Switching Regulator

Description

STR-W6753 Datasheet PDF Download

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DMS-78XXSR Datasheet – High-Efficiency Switching Regulator

Description

DMS-78XXSR Datasheet PDF