STMicroelectronics has introduced a clamping circuit to protect fly-back converters and switchmode power supplies against overvoltage spikes.
The PKC-136 Peakclamp combines a 700 V blocking diode and a transil clamping diode with a breakdown voltage of 160 V, in a DO-15 axial package.
The device allows a continuous dissipation of 1.5 W and a peak power dissipation of 600 W for a 10/1000 µs pulse.
The device is claimed to outperform an RCD circuit by offering a neart-constant clamping voltage, whatever the load. Standby power loss is also reduced compared with an RCD, as is the conducted EMI emission.
By integrating the transil and diode functions, the Peakclamp cuts component counts, speeding assembly in production and providing greater relability.
Phone: 02 9550 6600
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