1

November 1996

HIP4081

80V/2.5A Peak, High Frequency

Full Bridge FET Driver

Features

• Independently Drives 4 N-Channel FET in Half Bridge

or Full Bridge Configurations

Rise and Fall Times of Typically 10ns

• User-Programmable Dead Time

• On-Chip Charge-Pump and Bootstrap Upper Bias

Supplies

• DIS (Disable) Overrides Input Control

• Input Logic Thresholds Compatible with 5V to 15V

Logic Levels

• Very Low Power Consumption

Applications

• Medium/Large Voice Coil Motors

• Full Bridge Power Supplies

• Class D Audio Power Amplifiers

• High Performance Motor Controls

• Noise Cancellation Systems

• Battery Powered Vehicles

• Peripherals

• U.P.S.

Description

The HIP4081 is a high frequency, medium voltage Full

Bridge N-Channel FET driver IC, available in 20 lead plastic

SOIC and DIP packages. The HIP4081 can drive every pos-

sible switch combination except those which would cause a

shoot-through condition. The HIP4081 can switch at fre-

quencies up to 1MHz andssssss is well suited to driving

Voice Coil Motors, high-frequency Class D audio amplifiers,

and power supplies.

For example, the HIP4081 can drive medium voltage brush

motors, and two HIP4081s can be used to drive high perfor-

mance stepper motors, since the short minimum “on-time”

can provide fine micro-stepping capability.

Short propagation delays of approximately 55ns maximizes

control loop crossover frequencies and dead-times which

can be adjusted to near zero to minimize distortion, resulting

in rapid, precise control of the driven load.

A similar part, the HIP4080, includes an on-chip input com-

parator to create a PWM signal from an external triangle

wave and to facilitate “hysteresis mode” switching.

See Application Note AN9325 for HIP4081, Intersil Answer-

FAX, (407) 724-7800, document #99325. Intersil web home

page: http://www.semi.intersil.com

Similar part HIP4081A includes undervoltage circuitry which

does not require the circuitry shown in Figure 30 of this data

sheet.

Pinout

HIP4081

(PDIP, SOIC)

TOP VIEW

Ordering Information

PART

NUMBER

TEMP.

PACKAGE

PKG.

NUMBER

HIP4081IP

-40 to 85

20 Lead Plastic DIP

E20.3

HIP4081IB

-40 to 85

20 Lead Plastic SOIC

M20.3

11

12

13

14

15

16

17

18

20

19

10

9

8

7

6

5

4

3

2

1

BHB

BHI

DIS

BLI

ALI

HDEL

AHI

LDEL

AHB

BHO

BLO

BLS

BHS

ALS

ALO

AHS

AHO

File Number

3556.7

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

www.intersil.com or 407-727-9207