150A LiDAR development board uses GaN for 5ns pulses

December 01, 2017 // By Nick Flaherty
Efficient Power Conversion Corporation (EPC) has launched a 100 V, 150A high current pulsed laser diode driver evaluation board that can be used for high speed pulses in a LiDAR laser sensor system.

When used in a LiDAR system for creating 3D maps for autonomous vehicle applications, the EPC9126HC provides power pulses to drive the laser up to ten times faster than an equivalent MOSFET.

The EPC9126HC development board is primarily intended to drive laser diodes and features an EPC2001C ground-referenced eGaN FET driven by a Texas Instruments UCC27611 gate driver. The EPC2001C is a 100 V maximum voltage device capable of current pulses up to 150 A. The EPC9126HC can drive 75 A pulses into a high power triple junction laser diode with a pulse width as low as 5 ns.

The board includes multiple ultra-low inductance connection options for mounting laser diodes and can drive these via a discharging a capacitor (as shipped) or directly from a power bus. The board does not include a laser diode, which must be supplied by the user to evaluate specific applications.

The printed circuit board is designed to minimize the power loop inductance while maintaining mounting flexibility for the laser diode. It includes multiple on-board passive probes for voltages and discharge capacitor current measurement, and comes equipped with SMA connections for input and sensing designed for 50 Ω measurement systems. In addition, the user can enable an optional precision narrow pulse generator.

The board can also be used for other applications requiring a ground-referenced eGaN FET, for example in Class E or similar circuits.

The EPC9126HC 150 A high current pulsed laser diode driver evaluation board is priced at $231.25 and is available from Digi-Key.


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