Radiation-tolerant source driver operates over -55 to 125°C

July 10, 2012 // By Jean-Pierre Joosting
Microsemi Corporation has introduced the first product in a family of octal source driver integrated circuits for aerospace and other high-reliability power electronics control applications including motor control.

The AAHS298B is radiation-tolerant to 100kRad (Si) total dose and screened to meet operating temperatures ranging from -55 to 125 degrees Celsius and class S and class B screening levels. The driver can be used in conjunction with Microsemi's radiation-hardened and -tolerant programmable logic products and diodes to easily implement redundant power management solutions.

The AAHS298B includes eight non-inverting channels and can be used to provide an interface from TTL level, 5 V or 12 V logic systems to relays, stepper and servo motors, solenoids and other loads. Each output is capable of sourcing 700 mA with a withstand voltage of 50 V across the full military operating range, allowing manufacturers to develop more compact solutions. It includes an internal thermal shutdown feature to protect against over-current and soft-start occurrences. Additional features include: single event latch-up (SEL) immune, low quiescent current consumption, internal ground clamp diodes, output breakdown voltage of 50 V (minimum), and transistor-transistor logic (TTL), 5 V and 12 V logic compatiblity.

The AAHS298B source driver is available in production now and is packaged in a 20-pin ceramic small-outline integrated circuit (SOIC) package.

www.microsemi.com