ISO 9001 CERTIFIED BY DSCC
M.S.KENNEDY CORP.
4707 Dey Road Liverpool, N.Y. 13088
10 AMP, 75V, H-BRIDGE
MOSFET BRUSHED
MOTOR CONTROLLER
4251
(315) 701-6751
FEATURES:
75 Volt Motor Supply Voltage
10 Amp Output Switch Capability
100% Duty Cycle High Side Conduction Capable
Shoot-Through/Cross Conduction Protection
"Real" Four Quadrant Torque Control Capability
Good Accuracy Around the Null Torque Point
DESCRIPTION:
The MSK 4251 is a complete H-bridge MOSFET Brushed Motor Control System in an electrically isolated plastic encap-
sulated package. The hybrid is capable of 10 amps of output current and 75 volts of DC bus voltage. It has the normal
features for protecting the bridge. Included is all the bridge drive circuitry, and all the current sensing and analog circuitry
necessary for closed loop current mode (torque) control. When PWM'ing, the transistors are modulated in locked anti-
phase mode for the tightest control and the most bandwidth. Provisions for applying different compensation schemes are
included. The MSK 4251 has good thermal conductivity of the MOSFET's due to the electrically isolated substrate/package
design that allows direct heat sinking of the hybrid without insulators.
EQUIVALENT SCHEMATIC
TYPICAL APPLICATIONS
Brushed DC Motor Control
Servo Control
Fin Actuator Control
Voice Coil Control
Gimbal Control
AZ-EL Control
1
2
3
4
5
6
7
8
9
10
1
PIN-OUT INFORMATION
GND
DISABLE
CURRENT COMM.+
CURRENT COMM.-
CURRENT MONITOR
NC
E/A-
+15VIN
E/A OUT
-15VIN
20
19
18
17
16
15
14
13
12
11
AV+
AØ
AV-
BV+
NC
BØ
BV-
SENSE RESISTOR +
RTN
RTN
Rev. B 1/05
MSK [ M.S. KENNEDY CORPORATION ]
