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Optocouplers boast 50% smaller package size

Posted: 20 May 2011     Print Version  Bookmark and Share

Keywords:gate drive  optocoupler  small footprint package 

Avago Technologies debuts the ACPL-P34x and ACPL-W34x gate drive optocouplers that enable higher output current drive with rail-to-rail capability aimed at high-voltage insulation and protection for industrial drive, inverter and power supply applications.

The optocouplers are available in a stretched SO6 package that is 40–50 per cent smaller than industry-standard Dual-inline package (DIP). With output current up to 4A—the market's highest in this package—the family provides reliable, fast and efficient system performance.

Traditionally, Avago gate drive optocouplers have used bipolar transistors for the output stage to deliver high output current. With process technology improvements, the output stage can now be replaced with bipolar CMOS/DMOS technology, which combines the high component density and low power consumption of CMOS with the high current drive and speed of bipolar process. The switching speed is also now twice as fast as the previous generation, reducing the dead time when both the high-side and low-side transistors are off from 700ns–200ns for improved system efficiency.

The ACPL-P343/W343, ACPL-P341/W341 and ACPL-P340/W340 optocouplers come in 4A, 3A and 1A maximum peak output current, respectively. The wide range of output current allows the optocoupler family to address systems with different power ratings, including Insulated Gate Bipolar Transistor (IGBT) and MOSFET gate drive, industrial inverters, renewable energy inverters, AC and brushless DC motor drives, switching power supplies, induction cookers and inverters for home appliances. The high common mode rejection (CMR) of the optocouplers, at 35kV/µs prevents erroneous driving of an IGBT and ensures reliable operation in noisy environments. The optocouplers' stretched SO6 packages are compliant to many industrial safety standards, including IEC/EN/DIN EN 60747-5-2, UL 1577 and CSA.

Additional features of the ACPL-P34x and ACPL-W34x products include: 1) Industrial temperature range of -40°C–105°C; 2) Low ICC supply current for bootstrap operation and low power consumption; 3) Under Voltage Lock-Out (UVLO) with hysteresis for IGBT protection; 4) UL 1577 compliance with 5000VRMS/1 minute rating; and 5) 8mm creepage and clearance.

Samples and production quantities of the ACPL-P34x and ACPL-W34x optocoupler are now available.

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