Avago Technologies has added three new isolation optocouplers to its R2Coupler family. The new parts provide safe isolation for electric vehicle (EV) and hybrid/electric vehicle (HEV) applications such as onboard charging systems and powertrain inverters, while extending the working voltage range of existing R2Couplers.
The ACPL-34JT is an isolated gate drive with many smart functions and features incorporated to improve integration; The ACPL-C87AT/C87BT isolation amplifier provides instrumentation amplifier performance with integrated isolation; and the ACPL-K7xT provides single and dual channels to enhance configurability and manage space savings.
These new devices provide high integration of functions in modules, isolated smart gate drives, analog sensing and digital communications. Powertrain inverters, onboard chargers and DC-DC converters draw on gate drives for driving power devices like MOSFETs and IGBTs. They need isolation amplifiers to sense high voltage bus levels and digital isolation to communicate status and feedback information from the high-voltage side of the optocoupler to the microprocessor on the low-voltage side.
Current automotive systems operate at approximately 400 V with future systems moving towards 700 V to 800 V. These new optocouplers are rated for continuous working voltages of 1140 V or higher, more than sufficient to meet future needs.
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