HCPL-788J 参数 Datasheet PDF下载

Isolation Amplifier with Short

Circuit and Overload Detection

Technical Data

HCPL-788J

Features

• Output Voltage Directly

Compatible with A/D

Converters (0 V to V

REF

)

• Fast (3

µ

s) Short Circuit

Detection with Transient

Fault Rejection

• Absolute Value Signal Out-

put for Overload Detection

• 1

µ

V/

°

C Offset Change vs.

Temperature

• SO-16 Package

• -40

°

C to +85

°

C Operating

Temperature Range

• 25 kV/

µ

s Isolation Transient

Immunity

• Regulatory Approvals

(Pending): UL, CSA, VDE

0884 (891 Vpeak Working

Voltage)

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

ISOLATION BOUNDARY

1

2

3

4

5

6

7

8

+5 V

V

IN+

V

IN-

FAULT

ABSVAL

V

OUT

V

REF

16

15

14

13

12

11

10

R

SENSE1

SHORT CIRCUIT FAULT

MICRO

CONTROLLER

HCPL-788J

9

ISOLATION BOUNDARY

1

2

3

4

5

6

7

A/D

CONVERTER

V

IN+

V

IN-

FAULT

ABSVAL

V

OUT

V

REF

16

15

14

13

12

11

10

R

SENSE2

V

REF

M

3 PHASE

MOTOR

8

HCPL-788J

9

ISOLATION BOUNDARY

1

2

3

4

5

6

7

8

3 PHASE ABSOLUTE

VALUE OUTPUT

V

IN+

V

IN-

FAULT

ABSVAL

V

OUT

V

REF

16

15

14

13

12

11

10

R

SENSE3

+

–

+

–

V

TH

OVERLOAD

FAULT

HCPL-788J

9

Hewlett-Packard’s Isolation Amplifier with Short Circuit and Overload Detection makes

motor phase

current sensing compact, affordable and easy-to-implement

while satisfying worldwide safety and

regulatory requirements.

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.