LD Drivers Based on Other Topologies

doi:10.1117/3.2268619.ch10

Book: Powering Laser Diode Systems

Author(s): Grigoriy A. Trestman

Published: 2017

https://doi.org/10.1117/3.2268619.ch10

Author Affiliations +

Abstract

At first glance, the buck converter (Fig. 10.1) looks like a very attractive topology for creating a LDD. Compared to other topologies, it contains a minimal number of parts: just one power switch Q1, one filter inductor Lf, and one freewheeling diode D1. It can work in a continuous conduction mode with PWM and regulate the average current within a wide range. By using a corresponding inductor Lf, the current ripple in the LD could be minuscule. Moreover, the converter has a high dynamic output impedance due to this inductor.