MSK4231RH_15 Datasheet, PDF (1/8 Pages) M.S. Kennedy Corporation – Total Dose Hardened to 100 Krads(Si) (Method 1019.7 Condition A)

MIL-PRF-38534 AND 38535 CERTIFIED FACILITY
4231RH RAD HARD 10 AMP, 70V,
H-BRIDGE MOSFET
STEPPER MOTOR DRIVE
FEATURES:
Total Dose Hardened to 100 Krads(Si) (Method 1019.7 Condition A)
70V Maximum Operating Motor Supply Voltage
100V Absolute Maximum Output Stage Rating
10Amp Continuous Output Switch Capability
Two Independent H Bridge MOSFET Output Stages Plus Gate Drivers
External High Side Capacitor Connections for Extended High Side Operation
Provisions for Bottom Side Current Sensing
Logic Level Bridge Shutdown
Isolated Package Design for High Voltage Isolation Plus Good Thermal Transfer
Contact MSK for MIL-PRF-38534 Qualification and Radiation Test Status
Non-Rad Hard EDU Version Available (MSK4230)
DESCRIPTION:
The MSK4231RH is a rad hard dual, independent MOSFET H Bridge with gate drivers for dual winding stepper motor
drive capability. It is constructed in a convenient isolated hermetic package. The logic input and bridge output have a common
return; the input is not electrically isolated from the output. Provisions for output stage isolation must be made externally.
Each high side drive has the capability of connecting external capacitance for extended high side ON time before refresh is
necessary. A common shutdown pin will disable both bridges upon activation. The bridge is capable of 10Amp continuous
current output with sufficient heat sinking, and is capable of 70V maximum operating supply voltage. The bridge is con-
structed with 100V absolute maximum voltage rated MOSFET to allow for de-rating to 70V. Any PWM scheme can be used
for any type of microstepping for both high torque and/or high speed motor operation. There is no simultaneous conductive
lockout, so provisions must be made externally for dead time. The MSK4231RH has good thermal conductivity for output
stage power dissipation due to the isolated package design that allows direct heat sinking of the device without insulators.
EQUIVALENT SCHEMATIC
1
8548-152 Rev. A 2/15