International Rectifier IR33x: Current-sensing IPS targets automotive systems

Switching as much as 100A, the IR33xHigh-side IPS (intelligent-power-switch) family features accurate current-sensing and built-in protection circuits suiting 14V automotive applications. In PWM (pulse-width-modulator)-controlled applications, the accurate current-sensing feature provides feedback, allowing a microcontroller or an ASIC to control the load current. Additional features include a ±5% current feedback at maximum load current and a 100-kHz feedback bandwidth, suiting applications with a low-side switch, providing high-frequency PWM and providing protection and load-current sensing for unidirectional dc motor-drive applications. The devices integrate overtemperature and overcurrent shutdown as well as reverse-polarity protection. In the case of a reverse-battery condition, an integrated protection circuit turns on the main MOSFET switch, relieving the intrinsic body diode, reducing thermal problems. The family also provides ESD protection and an active clamp circuit for safer operation and protection in harsh environments. Prices for the IR33x range from $1.44 to $1.95 (10,000).

International Rectifier, www.irf.com