Description
The HCPL-3100/3101 consists of an LED* optically
coupled to an integrated circuit with a power output
stage. These optocouplers are suited for driving
power MOSFETs and IGBTs used in motor control
inverter applications. The high operating voltage range
of the output stage provides the voltage drives required
by gate controlled devices. The voltage and current
supplied by these optocouplers allow for direct
interfacing to the power device without the need for an
intermediate amplifier stage.
The HCPL-3100 switches a 3000 pF load in 2 µs and
the HCPL-3101, using a higher speed LED, switches a
3000 pF load in 0.5 µs. With a CMR rating of 15 kV/µs
typical these opto-couplers readily reject transients
found in inverter applications.
The LED controls the state of the output stage.
Transistor Q2 in the output stage is on with the LED off,
allowing the gate of the power device to be held low.
Turning on the LED turns off transistor Q2 and
switches on transistor Q1 in the output stage which
provides current and voltage to drive the gate of the
power device.
Features
• High output current I
O1
and I
O2
(0.6 A Peak, 0.1 A continuous)
• 15 kV/µs minimum Common Mode Rejection (CMR) at
V
CM
= 1500 V
• Wide operating V
CC
range (15 to 30 volts)
• High speed
–1 µs typical propagation delay (HCPL-3100)
– 0.3 µs typical propagation delay (HCPL-3101)
• Recognized under UL 1577 for dielectric withstand proof
test voltages of 5000 vac, 1 minute
Applications
• Isolated MOSFET/IGBT gate drive
• AC and DC motor drives
• General purpose industrial inverters
• Uninterruptable power supply
CAUTION: It is advised that normal static precautions be taken in handling and assembly of this component to
prevent damage and/or degradation which may be induced by ESD.
Functional Diagram
Q2
Q1
8
7
6
5
V
GND
V
V
1
2
3
4
ANODE
CATHODE
HCPL-3100
O2
O1
CC
Q2
Q1
8
7
6
5
V
GND
V
V
1
2
3
4
ANODE
CATHODE
HCPL-3101
O2
O1
CC
TRUTH TABLE
LED
ON
OFF
OUTPUT
HIGH LEVEL
LOW LEVEL
Q1
ON
OFF
Q2
OFF
ON
THE USE OF A 0.1 µF BYPASS CAPACITOR CONNECTED BETWEEN PINS 8 AND 7
IS RECOMMENDED. ALSO CURRENT LIMITING RESISTOR IS RECOMMENDED
(SEE FIGURE 1, AND NOTE 2 AND NOTE 7).
*HCPL-3100 LED contains Silicon-doped GaAs and HCPL-3101
LED contains AlGaAs.
HCPL-3100, HCPL-3101
Power MOSFET/IGBT Gate Drive Optocouplers
Data Sheet
