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
®
HV
VDDH
HS OUT
VDD
HS IN
LS IN
HS RTN
LS OUT
COM
LS
RTN
INT100
PI-1807-031296
Figure 1. Typical Application
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.
VDD
HS IN
LS IN
COM
COM
N/C
LS RTN
LS OUT
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
N/C
VDDH
HS RTN
HS RTN
HS RTN
HS OUT
N/C
N/C
PI-1067-101493
Figure 2. Pin Configuration.
ORDERING INFORMATION
PART
NUMBER
INT100S
PACKAGE
OUTLINE
S16A
ISOLATION
VOLTAGE
800 V
June 1996
POWERINT [ POWER INTEGRATIONS, INC. ]
