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PDF HCPL-788J Data sheet ( Hoja de datos )
| Número de pieza | HCPL-788J | |
| Descripción | Isolation Amplifier with Short Circuit and Overload Detection | |
| Fabricantes | Agilent(Hewlett-Packard) | |
| Logotipo | .gif "Agilent(Hewlett-Packard)"){kind=logo} |
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Isolation Amplifier with Short
Circuit and Overload Detection
Technical Data
HCPL-788J
Features
• Output Voltage Directly
Compatible with A/D
Converters (0 V to VREF)
• 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
RSENSE1
ISOLATION BOUNDARY
1 VIN+
2 VIN-
3
4
5
6
16
15
FAULT 14
ABSVAL 13
VOUT 12
VREF 11
7 10
8 HCPL-788J 9
RSENSE2
M
3 PHASE
MOTOR
RSENSE3
ISOLATION BOUNDARY
1 VIN+
2 VIN-
3
4
5
6
16
15
FAULT 14
ABSVAL 13
VOUT 12
VREF 11
7 10
8 HCPL-788J 9
ISOLATION BOUNDARY
1 VIN+
2 VIN-
3
4
5
6
16
15
FAULT 14
ABSVAL 13
VOUT 12
VREF 11
7 10
8 HCPL-788J 9
+5 V
SHORT CIRCUIT FAULT
MICRO
CONTROLLER
A/D
CONVERTER
VREF
3 PHASE ABSOLUTE
VALUE OUTPUT
+
–
+
–
VTH
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.
1 page  
5
Insulation and Safety Related Specifications
Parameter
Minimum External Air Gap
(Clearance)
Minimum External Tracking
(Creepage)
Minimum Internal Plastic Gap
(Internal Clearance)
Symbol
L(101)
L(102)
Min.
8.3
8.3
0.5
Max.
mm
mm
mm
Tracking Resistance
(Comparative Tracking Index)
Isolation Group
CTI
>175 Volts
IIIa
Conditions
Measured from input terminals to output
terminals, shortest distance through air.
Measured from input terminals to output
terminals, shortest distance path along body.
Through insulation distance conductor to
conductor, usually the straight line distance
thickness between the emitter and detector.
DIN IEC 112/VDE 0303 Part 1
Material Group (DIN VDE 0110, 1/89, Table 1)
Absolute Maximum Ratings
Parameter
Storage Temperature
Operating Temperature
Supply Voltages
Steady-State Input Voltage
2 Second Transient Input Voltage
Output Voltage
Absolute Value Output Voltage
Reference Input Voltage
Reference Input Current
Output Current
Absolute Value Current
FAULT Output Current
Input IC Power Dissipation
Output IC Power Dissipation
Solder Reflow Temperature Profile
Symbol
Min.
Max.
TS -55 125
TA -40 100
VDD1, VDD2
0.0
5.5
VIN+, VIN-
-2.0 VDD1 + 0.5
-6.0
VOUT
-0.5 VDD2 + 0.5
ABSVAL
VREF
-0.5 VDD2 + 0.5
0 VDD2 + 0.5 V
IREF
IVOUT
IABSVAL
20
20
20
IFAULT
PI
20
200
PO 200
See Package Outline Drawings section
Units
°C
V
mA
mW
Note
4
5
Recommended Operating Conditions
Parameter
Ambient Operating Temperature
Supply Voltages
Input Voltage (accurate and linear)
Input Voltage (functional)
Reference Input Voltage
FAULT Output Current
Symbol
TA
VDD1, VDD2
VIN+, VIN-
VIN+, VIN-
VREF
IFAULT
Min.
-40
4.5
-200
-2
4.0
Max.
85
5.5
200
2
VDD2
4
Units
°C
V
mV
V
mA
Note
5 Page 
11
VIN+
50 Ω
10 Ω 0.01 µF
0.1 µF
VDD1
0.1 µF
1
3
4
6
5, 7
2, 8
HCPL-788J
Figure 20. AC Test Circuit.
5V
4.7 kΩ
14 FAULT
13
ABSVAL
12 VOUT
11
VREF
0.1 µF
10,15
9, 16
VDD2
0.1 µF
1 VIN+
2 VIN-
FAULT
DETECT
Σ∆
MODULATOR
ENCODER
3 CH
4 CL
256 mV
REFERENCE
6 VLED+
5 VDD1
7 VDD1
8 GND1
Figure 21. Internal Block Diagram.
HCPL-788J
DECODER
D/A
LPF
VREF 11
VOUT 12
RECTIFIER
ABSVAL 13
FAULT 14
VDD2 15
VDD2 10
GND2 9
GND2 16
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet HCPL-788J.PDF ] | |
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