GENERAL DESCRIPTION

The SGM46000 is an integrated primary-side controller

and H-bridge driver for isolated power-supply circuits.

The device contains an on-board oscillator, protection

circuitry and internal FET drivers to provide up to 3W of

power to the primary winding of a transformer from +5V

power supply. The SGM46000 can be operated using

the internal programmable oscillator or can be driven

by an external clock for improved EMI performance.

Regardless of the clock source being used, an internal

flip-flop stage guarantees a fixed 50% duty cycle to

prevent DC current flow in the transformer.

The SGM46000 operates from a single-supply voltage

of 2.5V to 5.5V, and includes under-voltage lockout for

controlled startup. The device prevents crossconduction of the H-bridge MOSFETs by implementing

break-before-make switching. Thermal shutdown

circuitry provides additional protection against damage

due to over-temperature conditions.

The SGM46000 is available in Green SOIC-8 (Exposed

Pad) package. It operates over an ambient temperature

range of -40℃ to +125℃.

FEATURES

 Provides Up to 3W to the Transformer in Isolated

Power Supplies

 Single Supply 2.5V to 5.5V Wide Operation Range

 Internal Resistor-Programmable Oscillator Mode

 External Clock Mode with Watchdog

 Disable Mode

 Under-Voltage Lockout Function

 Thermal Shutdown

 -40℃ to +125℃ Operating Temperature Range

 Available in Green SOIC-8 (Exposed Pad) Package

APPLICATIONS

Isolated Power Supplies

Industrial Process Control

Isolated Communications Links

Medical Equipment

Telecommunications