HCPL788J Datasheet, PDF (1/20 Pages) Agilent(Hewlett-Packard) – Isolation Amplifier with Short Circuit and Overload Detection

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 µs) Short Circuit
Detection with Transient
Fault Rejection
• Absolute Value Signal Out-
put for Overload Detection
• 1 µV/°C Offset Change vs.
Temperature
• SO-16 Package
• -40°C to +85°C Operating
Temperature Range
• 25 kV/µs 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
R_SENSE1
ISOLATION BOUNDARY
1 V_IN+
2 V_IN-
3
4
5
6
16
15
FAULT 14
ABSVAL 13
V_OUT 12
V_REF 11
7
10
8 _HCPL-788J 9
R_SENSE2
M
3 PHASE
MOTOR
R_SENSE3
ISOLATION BOUNDARY
1 V_IN+
2 V_IN-
3
4
5
6
16
15
FAULT 14
ABSVAL 13
V_OUT 12
V_REF 11
7
10
8 _HCPL-788J 9
ISOLATION BOUNDARY
1 V_IN+
2 V_IN-
3
4
5
6
16
15
FAULT 14
ABSVAL 13
V_OUT 12
V_REF 11
7
10
8 _HCPL-788J 9
+5 V
SHORT CIRCUIT FAULT
MICRO
CONTROLLER
A/D
CONVERTER
V_REF
3 PHASE ABSOLUTE
VALUE OUTPUT
+
–
+
–
V_TH
OVERLOAD
FAULT
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.