®
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
HV
Built-in High-voltage Level Shifters
• Can withstand up to 800 V for direct interface to the HV-
referenced high-side switch
V
DDH
HS OUT
• Pulsed internal high-voltage level shifters reduce power
consumption
HS RTN
V
DD
HS IN
LS IN
COM
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
LS OUT
LS
RTN
INT100
Built-in Protection Features
• Simultaneous conduction lockout protection
• Undervoltage lockout
PI-1807-031296
Figure 1. Typical Application
Description
The INT100 half-bridge driver IC provides gate drive for
externallow-sideandhigh-sideMOSFETswitches. TheINT100
providesasimple,cost-effectiveinterfacebetweenlow-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.
V
HS IN
LS IN
COM
COM
N/C
LS RTN
LS OUT
N/C
V
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
DD
DDH
HS RTN
HS RTN
HS RTN
HS OUT
N/C
N/C
Built-in protection logic prevents both switches from turning
onatthesametimeandshortingthehighvoltagesupply. Pulsed
internallevelshiftingsavespowerandprovidesenhancednoise
immunity. The circuit is powered from a nominal 15 V supply
toprovideadequategatedriveforexternalN-channelMOSFETs.
A floating high-side supply is derived from the low-voltage rail
by using a simple bootstrap technique.
PI-1067-101493
Figure 2. Pin Configuration.
ORDERING INFORMATION
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.
PART
ISOLATION
PACKAGE
OUTLINE
NUMBER
VOLTAGE
INT100S
S16A
800 V
The INT100 is available in a 16-pin plastic SOIC package.
June 1996