MSK4203ED datasheet(3/5 Pages) MSK

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APPLICATION NOTES

MSK 4203 PIN DESCRIPTIONS

Rev. A 10/02

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. The +5V regulator also gets its supply voltage

from this pin. Optimum operation occurs with VCC set at

12V.

V+ - Is the high 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

ensure removal of any drooping during switching, should

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

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

Increasing the input voltage causes increased duty cycles

at this output.

OUTPUT 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 - 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 con-

nected directly to ground. The maximum voltage on this

pin is ±2 volts with respect to GND.

RSENSE B - 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 con-

nected directly to ground. The maximum voltage on this

pin is ±2 volts with respect to GND.

HEN - Is the connection for enabling the high side output

switches. When taken low, HEN overrides other inputs

and the high side switches remain off. When HEN is high,

everything functions normally. An internal pullup to Vcc

will keep HEN high if left unconnected.

INPUT - Is an analog input for controlling the PWM pulse

width of the bridge. A voltage higher than 6V will pro-

duce greater than 50% duty cycle pulses out of OUTPUT

A. A voltage lower than 6V will produce greater than

50% duty cycle pulses out of OUTPUT B.

DIS - Is the connection for disabling all 4 output switches.

DIS high overrides all other inputs. When taken low, ev-

erything functions normally. An internal pullup to Vcc will

keep DIS high if left unconnected. This pin should be

grounded if not used.

GND - Is the return connection for the input logic and

Vcc.

+5V OUT- Is the output of the internal linear regulator.

This pin should be bypassed to GND using a 4.7µF tanta-

lum capacitor and a 0.1µF ceramic capacitor . This pin

can supply up to 500mA of output current for powering

other external circuitry, depending on case temperature

and input voltage.

ABSOLUTE MAXIMUM RATINGS

75V

16V

10A

23A

GND-2V min. to V+ max.

500mA

VCC

OV to VCC

V+

VCC

IOUT

IPK

VOUT

IOUT

VIN

-65°C to +150°C

300°C

-55°C to +125°C

-40°C to +125°C

+175°C

3.9°C/W

18°C/W

TST

TLD

θJc

High Voltage Supply

Logic Supply

Continuous Output Current

Peak Output Current

Output Voltage Range

(+5V Regulator)

Input Voltage

Logic Input Voltage (HEN,DIS)

Storage Temperature Range

Lead Temperature Range

(10 Seconds)

Case Operating Temperature

MSK4203H/E

MSK4203

Junction Temperature

Thermal Resistance

(Output FETS @ 125°C)

(+5Vout Regulator @ 125°C)

MSK4203ED Datasheet(PDF) 3 Page - M.S. Kennedy Corporation

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