Feb.1999

MITSUBISHI HYBRID ICs

M57955L

HYBRID IC FOR DRIVING HIGH BETA TRANSISTOR MODULES

CIRCUIT DIAGRAM

DESCRIPTION

M57955L is a Hybrid Integrated Circuit designed for driving High

Beta Transistor Modules QM50DY-HB, etc., in an Inverter application.

This device operates as an isolation amplifier Transistor Modules

due to the electrical isolation between the input and output circuits

with a opto-coupler, as well as its driving capability which only re-

quires single power supply.

FEATURES

q Electrical isolation between input and output with integrated opto-

q Applicable with single power supply (7 ~ 9V)

q Applicable with TTL input

APPLICATION

To drive High Beta Transistor Modules for Inverter applications

OUTLINE DRAWING

Dimensions in mm

BLOCK DIAGRAM

2.54

0.55±0.1

2.54!7=17.78

0.35±0.2

2

1

5

6

7

8

4MAX.

3MAX.

1.8MAX.

8.5MAX.

10.0MAX.

26MAX.

390

Ω

2

1

Tr1

Tr2

5

6

7

8

INTER-

FACE

CIRCUIT

OPTO-COUPLER

PC