MSK4200 datasheet(3/5 Pages) MSK

3 / 5 page

APPLICATION NOTES

MSK 4200 PIN DESCRIPTION

VCC - Is the low voltage supply for powering internal

logic and drivers for the lowside and highside MOSFETS.

The supplies for the highside drivers are derived from

this voltage.

MOTOR A - Is the output pin for one half of the bridge.

Increasing the input voltage causes increased duty cycles

at this output.

V+ - Is the higher voltage H-bridge supply. The MOSFETS

obtain the drive current from this supply pin. The voltage

on this pin is limited by the drive IC. The MOSFETS are

rated at 100 volts. Proper bypassing to GND with suffi-

cient capacitance to suppress any voltage transients, and

to ensure removing any drooping during switching, should

be done as close to the pins on the hybrid as possible.

MOTOR B - Is the output pin for the other half of the

bridge. Decreasing the input voltage causes increased

duty cycles at this output.

RSENSE A - This is the connection for the bottom of the A

half bridge. This can have a sense resistor connected to

the V+ return ground for current limit sensing, or can be

connected directly to ground. The maximum voltage on

this pin is ±2 volts with respect to GND.

GND - Is the return connection for the input logic and

Vcc.

RSENSE B - This is the connection for the bottom of the B

half bridge. This can have a sense resistor connected to

the V+ return ground for current limit sensing, or can be

connected directly to ground. The maximum voltage on

this pin is ±2 volts with respect to GND.

INPUT - Is an analog input for controlling the PWM pulse

width of the bridge. A voltage higher than Vcc/2 will

produce greater than 50% duty cycle pulses out of

MOTOR A. A voltage lower than Vcc/2 will produce

greater than 50% duty cycle pulses out of MOTOR B.

Rev. B 7/02

MSK4200 Datasheet(PDF) 3 Page - M.S. Kennedy Corporation