 English |
|
|
|
|
|
|
|
| HCPL-316J-500E Datasheet, PDF (28/33 Pages) AVAGO TECHNOLOGIES LIMITED – 2.5 Amp Gate Drive Optocoupler with Integrated (VCE) Desaturation Detection and Fault Status Feedback | |||
| |||
| ◁ |
User-Configuration of the HCPL-316J Output Side RG
and Optional Resistor RC:
The value of the gate resistor RG (along with VCC2 and VEE)
determines the maximum amount of gate-charging/dis-
charging current (ION,PEAK and IOFF,PEAK) and thus should
be carefully chosen to match the size of the IGBT being
driven. Often it is desirable to have the peak gate charge
current be somewhat less than the peak discharge cur-
rent (ION,PEAK < IOFF,PEAK). For this condition, an optional
resistor (RC) can be used along with RG to independently
determine ION,PEAK and IOFF,PEAK without using a steering
diode. As an example, refer to Figure 74. Assuming that
RG is already determined and that the design IOH,PEAK =
0.5 A, the value of RC can be estimated in the following
way:
RC + RG = [VCC2 â VOH â (VEE)]
IOH,PEAK
= [4 V â (-5 V)]
0.5 A
= 18 Ω
RC = 8 Ω
See âPower and Layout Considerationsâ section for more
information on calculating value of RG.
VIN-
μC
RESET
FAULT
VCC
1 VIN+
2 VIN-
VCC
3 VCC1
4 GND1
HCPL-316J
5 RESET
6 FAULT
7 VLED1+
8 VLED1-
Figure 73c. Safe hardware reset for inverting input configuration.
HCPL-316J
VE 16
VLED2+ 15
DESAT 14
100 pF
VCC2 13
VC 12
VOUT 11
VEE 10
RC 8 Ω
10 Ω
10 nF
VEE 9
15 V
-5 V
Figure 74. Use of RC to further limit ION,PEAK.
VIN-
μC
RESET
FAULT
VCC
1 VIN+
2 VIN-
VCC
3 VCC1
4 GND1
HCPL-316J
5 RESET
6 FAULT
7 VLED1+
8 VLED1-
Figure 73d. Safe hardware reset for inverting input configuration
(automatically resets for every VIN- input).
28
|
▷ |
German
Russian
Spanish
Italian
Polish
Chinese
Japanese
Korean
French
Portuguese