16

15

14

13

12

11

10

9

1

2

3

4

5

6

7

8

FAULT

ABSVAL

SHORT CIRCUIT FAULT

ISOLATION BOUNDARY

A/D

CONVERTER

MICRO

CONTROLLER

HCPL-788J

16

15

14

13

12

11

10

9

1

2

3

4

5

6

7

8

FAULT

ABSVAL

ISOLATION BOUNDARY

HCPL-788J

16

15

14

13

12

11

10

9

1

2

3

4

5

6

7

8

FAULT

ABSVAL

ISOLATION BOUNDARY

HCPL-788J

M

+5 V

OVERLOAD

FAULT

+

–

+

–

3 PHASE ABSOLUTE

VALUE OUTPUT

3 PHASE

MOTOR

Low Cost Three Phase Current Sensing with Short Circuit and Overload Detection

HCPL-788J

Isolation Amplifier with Short Circuit and Overload Detection

Data Sheet

Description

Avago’s Isolation Amplifier with Short Circuit and Over-

load Detection makes motor phase current sensing com-

pact, affordable and easy-to-implement while satisfying

worldwide safety and regulatory requirements.

Applications

x Motor phase and rail current sensing

x Power inverter current and voltage sensing

x Industrial process control

x Data acquisition systems

x General purpose current and voltage sensing

x Traditional current transducer replacements

CAUTION: It is advised that normal static precautions be taken in handling and assembly of

this component to prevent damage and/or degradation which may be induced by ESD.

Features

x Output Voltage Directly Compatible with A/D

Converters (0 V to V

REF

)

x Fast (3 μs) Short Circuit Detection with Transient Fault

Rejection

x Absolute Value Signal Output for Overload Detection

x 1 μV/°C Offset Change vs. Temperature

x SO-16 Package

x -40°C to +85°C Operating Temperature Range

x 25 kV/μs Isolation Transient Immunity

x Regulatory Approvals: UL, CSA, IEC/EN/DIN EN 60747-

5-2 (1230 Vpeak Working Voltage)

Lead (Pb) Free

RoHS 6 fully

compliant

RoHS 6 fully compliant options available;

-xxxE denotes a lead-free product