ACPL-332J-000E Avago Technologies US Inc., ACPL-332J-000E Datasheet - Page 20

• Manufacturer Part Number: ACPL-332J-000E
• Description: Amplifier-Output Optocoupler,2-CHANNEL,3.75kV ISOLATION,SO
• Manufacturer: Avago Technologies US Inc.

Specifications of ACPL-332J-000E

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Figure 36. Recommended application circuit (Single Supply) with desaturation detection and active Miller Clamp
Description of Operation
Normal Operation
During normal operation, V
trolled by input LED current IF (pins 5, 6, 7 and 8), with
the IGBT collector-to-emitter voltage being monitored
through DDESAT. The FAULT output is high. See Figure 37.
Fault Condition
The DESAT pin monitors the IGBT V
voltage on the DESAT pin exceeds 6.5 V while the IGBT is
on, V
the IGBT and prevent large di/dt induced voltages. Also
Figure 37. Fault Timing diagram
20
V
V
V
V
+ _
FAULT
FAULT
FAULT
DESAT
DESAT
I
I
OUT
OUT
F
F
0.1µF
OUT
+ _
is slowly brought low in order to “softly” turn-off
6.5V
6.5V
R
C
R
F
F
1
2
3
4
5
6
7
7
8
t
t
DESAT(LOW)
DESAT(LOW)
V
V
FAULT
V
CATHODE
ANODE
ANODE
CATHODE
t
t
S
CC1
S
t
t
DESAT(90%)
DESAT(90%)
DESAT(FAULT)
DESAT(FAULT)
OUT
t
t
DESAT(10%)
DESAT(10%)
of the ACPL-332J is con-
t
t
DESAT(MUTE))
DESAT(MUTE))
90%
90%
50%
50%
ce
voltage. When the
50%
50%
10%
10%
DESAT
V
CLAMP
V
V
V
V
V
OUT
LED
CC2
V
EE
EE
E
16
15
14
13
12
11
10
9
0.1µF 0.1µF
activated is an internal feedback channel which brings
the FAULT output low for the purpose of notifying the
micro-controller of the fault condition.
Fault Reset
Once fault is detected, the output will be muted for 5 µs
(minimum). All input LED signals will be ignored during
the mute period to allow the driver to completely soft
shut-down the IGBT. The fault mechanism can be reset by
the next LED turn-on after the 5us (minimum) mute time.
See Figure 37.
R
C
PULL -DOWN
BLANK
100 Ω
R
-
t
t
G
RESET(FAULT)
RESET(FAULT)
Reset done
Reset done
during the
during the
next LED
next LED
turn-on
turn-on
D
DESAT
50%
50%
+ _
+ _
Q1
Q2
V
V
+
+
CE
-
CE
-
3-PHASE
+ HVDC
- HVDC
AC