Power MOSFET/IGBT Gate Drive Optocouplers
Description
H
Power MOSFET/IGBT Gate Drive Optocouplers
Technical Data
HCPL-3100 HCPL-3101
Features
• High Output Current IO1 and IO2 (0.
4 A Peak, 0.
1 A Continuous)
• 1.
5 kV/µs Minimum Common Mode Rejection (CMR) at VCM = 600 V
• Wide Operating VCC 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
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.
Functional Diagram
HCPL-3100
ANODE 1
8 VCC
The HCPL-3100 switches a 3000 pF load in 2 µs and the HCPL3101, using a higher speed LED, switches a 3000 pF load in 0.
5 µs.
With a CMR rating of 5 kV/µs typical these optocouplers 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.
HCPL-3101 1
8 VCC
CATHODE 2 3 4
7 GND
ANODE
Q2
6 VO2 CATHODE
Q1 5 VO1
2 3 4
7 GND Q2
6 VO2 Q1
5 VO1
TRUTH TABLE LED OUTPUT ON HIGH LEVEL OFF 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.
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