HCPL-316J-500E Datasheet, PDF (22/33 Pages) AVAGO TECHNOLOGIES LIMITED – 2.5 Amp Gate Drive Optocoupler with Integrated (VCE) Desaturation Detection and Fault Status Feedback

HCPL-316J
μC
5 V _{+ 0.1}
– μF
3.3
kΩ
1 V_IN+
2 V_IN-
3 V_CC1
4 GND1
5 RESET
V_E 16
0.1 0.1
μF μF
V_LED2+ 15
100 pF
DESAT 14
100 Ω ^DDESAT
+–
V_F
V_CC2 13
V_C 12
V_CC2 = 18 V
Q1
+
–
330 pF
6 FAULT
7 V_LED1+
8 V_LED1-
V_OUT 11
R_g
0.1
V_EE 10
47
kΩ
μF
+
–
Q2
V_EE 9
V_EE = -5 V
+
V_CE
–
3-PHASE
OUTPUT
+
V_CE
–
Figure 62. Recommended application circuit.
Description of Operation/Timing
Figure 63 below illustrates input and output waveforms
under the conditions of normal operation, a desat fault
condition, and normal reset behavior.
Normal Operation
During normal operation, V_OUT of the HCPL-316J is con-
trolled by either V_IN+ or V_IN-, with the IGBT collector-to-
emitter voltage being monitored through D_DESAT. The
FAULT output is high and the RESET input should be held
high. See Figure 63.
Fault Condition
When the voltage on the DESAT pin exceeds 7 V while
the IGBT is on, V_OUT is slowly brought low in order to
“softly”turn-off the IGBT and prevent large di/dt induced
voltages. Also activated is an internal feedback channel
which brings the FAULT output low for the purpose of
notifying the micro-controller of the fault condition. See
Figure 63.
Reset
The FAULT output remains low until RESET is brought
low. See Figure 63. While asserting the RESET pin (LOW),
the input pins must be asserted for an output low state
(V_IN+ is LOW or V_IN- is HIGH). This may be accomplished
either by software control (i.e. of the microcontroller) or
hardware control (see Figures 73 and 74).
NORMAL
OPERATION
NON-INVERTING
CONFIGURED
INPUTS
V_{IN- 0 V}
5V
V_IN+
INVERTING
CONFIGURED
INPUTS
V_{IN- 5 V}
V_{IN+ 5 V}
FAULT
CONDITION
RESET
7V
V_DESAT
V_OUT
FAULT
RESET
Figure 63. Timing diagram.
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