UC2950

Half-Bridge Bipolar Switch

CONNECTION DIAGRAM

SIMPLIFIED SCHEMATIC

TRUTH TABLE

Source

Drive

Pin 2

Sink Drive

Pin 5

Output

Pin 4

Low

Low

High

High

Low

High

Low

High

Low

Off

High

High

Note: With no load, output voltage will be

HIGH in the OFF state.

ABSOLUTE MAXIMUM RATINGS (Note 1)

Supply Voltage Range, VC . . . . . . . . . . . . . . . . . . . . . 8V to 35V

Output Voltage Range, VO . . . . . . . . . . . . . . . . –3.0V to VC+3V

Input Voltage Range, VIN . . . . . . . . . . . . . . . . . . –0.3V to +7.0V

Peak Output Current (100 ms, 10% DC) . . . . . . . . . . . . .

± 4.0A

Continuous Output Current . . . . . . . . . . . . . . . . . . . . . . .

± 2.0A

Power Dissipation with Heat Sink . . . . . . . . . . . . . . . . . . . . 15W

Power Dissipation in Free Air . . . . . . . . . . . . . . . . . . . . . . . . 2W

Operating Temperature Range, TA. . . . . . . . . –20°C to +100°C

Storage Temperature Range, TS . . . . . . . . . . –55°C to +125°C

Note 1: Consult Packaging section of databook for thermal

limitations and considerations of package.

5-PIN TO-220 (TOP VIEW)

T Package

FEATURES

• Source or Sink 4.0A

• Supply Voltage to 35V

• High-Current Output Diodes

• Tri-State Operation

• TTL and CMOS Input Compatibility

• Thermal Shutdown Protection

• 300kHz Operation

• Low-Cost TO-220 Package

DESCRIPTION

This device is a monolithic integrated circuit designed to provide

high-current switching with low saturation voltages when activated by

low-level logic signals. Source and sink switches may be independently acti-

vated without regard to timing as a built-in interlock will keep the sink off if

the source is on.

This driver has the high current capability to drive large capacitive loads

with fast rise and fall times; but with high-speed internal flyback diodes, it is

also ideal for inductive loads. Two UC2950s can be used together to form a

full bridge, bipolar motor driver compatible with high frequency chopper cur-

rent control.

SLUS280A - MAY 1993 - REVISED JULY 2003