Microsemi Adds Radiation-tolerant Source Driver to Space Portfolio

Microsemi Corp. introduced the first in a new 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°C and class S and class B screening levels. The new 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 or 12V logic systems to relays, stepper and servo motors, solenoids and other loads. Each output is capable of sourcing 700mA with a withstand voltage of 50V 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 50V (minimum)

-- Transistor-transistor logic (TTL), 5V and 12V logic compatible

Microsemi’s radiation-tolerant and -hardened solutions portfolio includes: ICs; FPGAs; power supplies; MOSFETs; bipolar transistors and diodes; solar diodes; hybrids; and integrated custom product that include solutions with multiple organizations of memories, gate arrays and processors in various hermetically-sealed ceramic packages.

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