Optocoupler operates over industrial temperatures

Avago's ACPL-312U, which is a member of the R2Coupler range, incorporates an alloy lead frame to offer superior heat dissipation, which allows it to operate over an extended industrial temperature range from -40 to 125C.

These extended temperature optocouplers from Avago target designers of isolated IGBT/power Mosfet gate drives, industrial inverters, AC and brushless DC motor drives, plus uninterruptable power supplies.

The ACPL-312U provides reinforced insulation and reliability that delivers safe signal isolation critical in automotive and high-temperature industrial applications.

The low-power ACPL-312U optocoupler series has been designed with under voltage lock-out protection (UVLO), high common-mode rejection (CMR) performance and high-speed response to improve efficiency.

Moreover, it is developed with a double-wire bonding process to provide added redundancy and reduce wire breakage during high-temperature operation.

Additionally, the low 5mA maximum supply current of this series of optocouplers allows bootstrap operation and reduces IC power consumption.

As a result, the cost of isolated power supplies or DC-DC converters can be reduced.

The 2.5A gate drive optocouplers contain an AIGaAs LED, which is optically coupled to an integrated circuit with a power output stage.

The high operating voltage range of the output stage provides the drive voltages required by gate-controlled devices.

The voltage and current supplied by these optocouplers are suitable for directly driving IGBTs with ratings up to 1,200V/100A.

For IGBTs with higher ratings, this series of optocouplers can be used to drive a discrete power stage that drives the IGBT gate.

The ACPL-312U series of optocouplers come in a standard DIP-8 package with a creepage of 7.4mm and clearance of 7.1mm.

These DIP-8 packages are compliant to most industrial safety standards such as IEC/EN/DIN EN 60747-5-5, UL 1577 and CSA.