Aeroflex Plainview in Plainview, N.Y., is offering a radiation-hardened pulse-width-modulation (PWM) controller. The PWM5032 high-speed, low-power controller, developed in partnership with Johns Hopkins University/Applied Physics Lab and the Technology Applications Group for the Mars Technology program, is for at the military and commercial satellites. The PWMs were designed using radiation-hardness techniques to ensure the product can withstand more than one megarad of total-dose radiation, provides features to implement DC-DC fixed frequency current, or voltage-mode control schemes with a minimal external parts count. Internally implemented low-power dissipation circuits include under-voltage lockout, a precision voltage reference for accuracy at the error amp input, sleep and enable control pins, a “power good” indicator, logic to ensure latched operation, selectable duty-cycle control, and a dual-totem-pole output stage designed to the source of sink high peak current. Its feature set and drive capability can be applied to PWM-implemented motor drive control designs. The PWM5032 is available in a 24-pin hermetic ceramic Gull lead package, MIL-PRF-38534 screening up to Class K. A Standard Microcircuit Drawing (SMD) number will be available at the end of this year. Prototypes are available now with production units in first quarter of 2007. For more information contact Aeroflex Plainview online at www.aeroflex.com/RadHard.
