HCPL-3120#500 Avago Technologies US Inc., HCPL-3120#500 Datasheet - Page 18

• Manufacturer Part Number: HCPL-3120#500
• Description: OPTOCOUPLER 1CH 2.5A 8-SMD
• Manufacturer: Avago Technologies US Inc.

Specifications of HCPL-3120#500

• Output Type: Gate Driver
• Package / Case: 8-SMD Gull Wing
• Voltage - Isolation: 3750Vrms
• Number Of Channels: 1, Unidirectional
• Current - Output / Channel: 2.5A
• Propagation Delay High - Low @ If: 300ns @ 7mA ~ 16mA
• Current - Dc Forward (if): 25mA
• Input Type: DC
• Mounting Type: Surface Mount, Gull Wing
• Configuration: 1 Channel
• Isolation Voltage: 3750 Vrms
• Maximum Propagation Delay Time: 500 ns
• Maximum Forward Diode Voltage: 1.8 V
• Minimum Forward Diode Voltage: 1.2 V
• Maximum Reverse Diode Voltage: 5 V
• Maximum Forward Diode Current: 16 mA
• Maximum Power Dissipation: 295 mW
• Maximum Operating Temperature: + 100 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Applications Information
Eliminating Negative IGBT Gate Drive (Discussion applies
to HCPL-3120, HCPL-J312, and HCNW3120)
To keep the IGBT firmly off, the HCPL-3120 has a very
low maximum V
realizes this very low V
with 1 Ω (typical) on resistance in its pull down circuit.
When the HCPL-3120 is in the low state, the IGBT gate
is shorted to the emitter by Rg + 1 Ω. Minimizing Rg
and the lead inductance from the HCPL-3120 to the
IGBT gate and emitter (possibly by mounting the HCPL-
CONTROL
Figure 25. Recommended LED drive and application circuit.
18
COLLECTOR
INPUT
+5 V
74XXX
OPEN
270 Ω
OL
specification of 0.5 V . The HCPL-3120
OL
1
2
3
4
by using a DMOS transistor
HCPL-3120
HCPL-3120 fig 25
8
7
6
5
0.1 µF
3120 on a small PC board directly above the IGBT) can
eliminate the need for negative IGBT gate drive in many
applications as shown in Figure 25. Care should be taken
with such a PC board design to avoid routing the IGBT
collector or emitter traces close to the HCPL-3120 input
as this can result in unwanted coupling of transient
signals into the HCPL-3120 and degrade performance. (If
the IGBT drain must be routed near the HCPL-3120 input,
then the LED should be reverse-biased when in the off
state, to prevent the transient signals coupled from the
IGBT drain from turning on the HCPL-3120.)
+
–
V
CC
Rg
= 18 V
Q1
Q2
3-PHASE
+ HVDC
- HVDC
AC