MSK4201B datasheet(3/7 Pages) MSK

3 / 7 page

APPLICATION NOTES

MSK 4201 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.

When the PWM input is high, this output will be pulled

up to V+.

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 by-passing to

GND with sufficient capacitance to suppress any volt-

age 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. When the PWM input is low, this output will be

pulled up to V+.

RSENSE - This is the common connection for the bot-

tom of the bridge. This can have a sense resistor con-

nection to the V+ return ground for current limit sens-

ing, or can be connected directly to ground. The maxi-

mum voltage on this pin is ±2 volts with respect to

GND.

GND - Is the return connection for the input logic and

Vcc.

PWM INPUT - Is a TTL compatible input pin for provid-

ing the PWM signal to modulate the output switches.

The duty cycle can be between 0% (DC Low) and 100%

(DC High). See typical system operation notes.

DISABLE INPUT - Is a TTL compatible input for provid-

ing a shutdown signal to the hybrid for disabling all

four switches in the bridge regardless of the PWM in-

put level. A digital 1 disables, a digital 0 enables.

Rev. B 6/00

MSK4201B датащи(PDF) 3 Page - M.S. Kennedy Corporation