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PDF MSK4231RH Data sheet ( Hoja de datos )
| Número de pieza | MSK4231RH | |
| Descripción | H-BRIDGE MOSFET STEPPER MOTOR DRIVE | |
| Fabricantes | MSK | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de MSK4231RH (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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MIL-PRF-38534 AND 38535 CERTIFIED FACILITY
RAD HARD 10 AMP, 70V,
H-BRIDGE MOSFET
4231RHSTEPPER 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
1 page  
TYPICAL APPLICATION LAYOUT
Shown is a typical application with the output stage PC board layout using sense resistors for the 4 half bridge legs. There are 2 planes,
one for the V+ power input, and one for the Ground return. They are to be on separate layers. The typical placement of the 2 types of
capacitors are also shown. V+ power and Ground return should connect to the same end of the PC board assembly, such that output
currents between the V+ and the Ground will cancel if they are flowing in the opposite direction, minimizing inductance.
The 2 planes shall be as wide as possible to minimize stray inductance. With the 2 types of capacitors split with the module in the middle,
it tends to again minimize stray inductance between it and the capacitances. It may be desirable to split both the bulk capacitance and
the poly capacitance and place one of each on each end of the module to further spread the capacitance out and minimize the effect of
stray inductance.
With the sense resistors and their connections shown, it is important to minimize trace length and keep the widths as wide as possible
for inductance reasons. The sense resistors shall be non-inductive, and have heatsinking appropriate to the value of resistor selected.
The sense traces do not carry significant current, so they can be routed back to the sensing and amplification circuitry elsewhere. It is
important to keep the sense and return traces for each resistor routed in close proximity to minimize noise pickup and capitalize on the
common mode rejection of a typical differential amplifier input.
This example of a layout is a typical one only. It is not intended to conform to any layout standards, but to show the concept of the layout,
current flow, and the use of planes for power and return.
5 8548-152 Rev. A 2/15
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet MSK4231RH.PDF ] | |
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