June 1996

INT100

Half-Bridge Driver IC

Low-Side and High-side Drive

with Simultaneous Conduction Lockout

Product Highlights

5 V CMOS Compatible Control Inputs

• Combines logic inputs for low and high-side drives

• Schmidt-triggered inputs for noise immunity

Built-in High-voltage Level Shifters

• Can withstand up to 800 V for direct interface to the HV-

referenced high-side switch

• Pulsed internal high-voltage level shifters reduce power

consumption

Gate Drive Outputs for External MOSFETs

• Provides 300 mA sink/150 mA source current

• Can drive MOSFET gates at up to 15 V

• External MOSFET allows flexibility in design for various

motor sizes

Built-in Protection Features

• Simultaneous conduction lockout protection

• Undervoltage lockout

Description

The INT100 half-bridge driver IC provides gate drive for

external low-side and high-side MOSFET switches. The INT100

provides a simple, cost-effective interface between low-voltage

control logic and high-voltage loads. The INT100 is designed

to be used with rectified 110 V or 220 V supplies. Both high-

side and low-side switches can be controlled independently

from ground-referenced 5 V logic inputs.

Built-in protection logic prevents both switches from turning

on at the same time and shorting the high voltage supply. Pulsed

internal level shifting saves power and provides enhanced noise

immunity. The circuit is powered from a nominal 15 V supply

to provide adequate gate drive for external N-channel MOSFETs.

A floating high-side supply is derived from the low-voltage rail

by using a simple bootstrap technique.

Applications for the INT100 include motor drives, electronic

ballasts, and uninterruptible power supplies. Multiple devices

can also be used to implement full-bridge and multi-phase

configurations.

The INT100 is available in a 16-pin plastic SOIC package.

®

Figure 1. Typical Application

ORDERING INFORMATION

N/C

PI-1067-101493

VDDH

HS RTN

HS RTN

HS OUT

N/C

N/C

VDD

HS IN

LS IN

COM

LS RTN

LS OUT

16

15

14

13

12

11

10

9

1

2

3

4

5

6

7

8

HS RTN

COM

N/C

Figure 2. Pin Configuration.

HV

HS IN

LS IN

COM

LS

RTN

HS RTN

HS OUT

LS OUT

INT100

PI-1807-031296

VDD

V

DDH

PART

NUMBER

INT100S

ISOLATION

VOLTAGE

800 V

S16A

PACKAGE

OUTLINE