ACPL-C78A Datasheet, PDF (13/17 Pages) AVAGO TECHNOLOGIES LIMITED – Miniature Isolation Amplifiers 0.3 mV Input Offset Voltage

HV+
+
GATE DRIVE
CIRCUIT
***
FLOATING
POWER
SUPPLY
–
MOTOR
***
+ ^R1 –
RSENSE
D1
5.1 V
R2
39 Ω
C1
0.1 µF
C2
0.01 µF
ACPL-C78A
ACPL-C780
ACPL-C784
***
HV-
Figure 17. Recommended Supply and Sense Resistor Connections.
POSITIVE
FLOATING
SUPPLY
HV+
C5
150 pF
MOTOR _{+ –}
***
RSENSE
GATE DRIVE
CIRCUIT
***
R3
10.0 K
U1
78L05 _VDD1
IN OUT
V_DD2 (+5 V)
+15 V
C8
0.1 µF
C1
C2
1
8 _C4
0.1
0.1
µF
R5 ^{µ F}
2
0.1 µF
7
R1
GND2
68
C3
U2
0.01
µF
3
6
2.00 K
R2
–
U3
+ _TL032A
VOUT
2.00 K
4
5
C7
GND1
ACPL-C78A
ACPL-C780
C6
150 pF
R4
10.0 K
0.1 µF
-15 V GND2
***
ACPL-C784
GND2
GND2
HV-
Figure 18. Recommended Application Circuit.
TO RSENSE+
R5
TO GND1 TO VDD1
C2
U2
C3
TO VDD2 TO GND2
C4
V_OUT+
VOUT–
TO RSENSE–
Note: Drawing not to scale
ACPL - C78A/C780/C784
Figure 19. Example Printed Circuit Board Layout.
13