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Description
2.0 Amp Output Current IGBT Gate Drive Optocoupler
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Description
Optocoupler also called Photocoupler are electronic circuits which are used to isolate two circuits electrically, since the two circuits remain connected via light hence term Optocoupler is used for such devices. A very common type of Optocoupler is LED and photo transistor pair, where LED act as transmitter and phot transistor act as receiver. Generally, Optocoupler do not provide enough output to drive power loads.
HCNW3120 contains AlGaAs LED, optically coupled to an integrated circuit with a power output stage. These Optocoupler are suitable for driving high power IGBTs and MOSFETs. The high output voltage operating range make it ideal for directly driving IGBTs with rating up to 1200V/ 100A.
Pin Description
IC Electrical Characteristics/ Specifications
This device can be mounted on printed circuit boards in through hole orientation, other electrical parameters of the device are given below
Working Principle
An Optocoupler contains a source of light which in most cases is Near Infrared Light Emitting Diode which converts the incoming signal into light, sometimes also called transmitter. On the other side there will be a photo sensitive device which may be a photo diode, photo transistor or photo resistor. This photo sensitive device translates the incoming light signal form the LED into an electrical signal. in IC HCNW3120 output is provide via power amplifier stage which enables this IC to drive the gates of high power devices like IGBT. A truth table explaining the operation of the HCNW3120 is shown below
Applications
HCNW3120 is found in following applications
● IGBT/MOSFET gate drive
● AC/Brushless DC motor drives
● Industrial inverter
● Switch mode power supplies
IGBT Gate Drive
IGBT driving circuit using HCNW3120 is shown in figure below. This circuit eliminates the need for negative gate drive for IGBTs
Electrical Isolation using HCNW3120
A typical circuit for isolating the input of out via HCNW3120 is shown in figure below. Input and output are electrically isolated but optically coupled
Preview of the first 3 pages of the data sheet
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HCNW3120
HCNW3120 has several brands around the world that may have alternate names for HCNW3120 due to regional differences or acquisition. HCNW3120 may also be known as the following names:
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