Maxim Integrated MAX256ASA T

Description
The MAX256 is an integrated primary-side controller and H-bridge driver for isolated power-supply circuits. It provides up to 3W of power to the primary winding of a transformer. The device can be operated using an internal programmable oscillator or an external clock for improved EMI performance. It guarantees a fixed 50% duty cycle to prevent DC current flow in the transformer. The MAX256 operates from a single-supply voltage of 5V or 3.3V and includes undervoltage lockout for controlled startup. It prevents cross-conduction of the H-bridge MOSFETs by implementing break-before-make switching. Thermal shutdown circuitry provides additional protection against damage due to overtemperature conditions.

Features
Simple, flexible design provides up to 3W to the transformer in isolated power supplies
Single supply 5V or 3.3V operation
Internal resistor-programmable oscillator mode
External clock mode with watchdog, disable mode
Integrated system protection:
Undervoltage lockout
Thermal shutdown
Saves space on board: 8-pin thermally-enhanced SO package

Applications
Isolated power supplies
Medical equipment
Telecommunications
Industrial process control
Isolated communications links