Power Electronics / Power Management


Dual-output DC-DC converters

17 September 2008 Power Electronics / Power Management

Maxim has introduced the MAX5098A/MAX5099 dual-output DC-DC converters capable of delivering 2 A and 1 A of output current from the respective output channels. Designed to operate directly from a car battery, these converters integrate load-dump protection circuitry to handle transients up to 80 V, and they operate down to 4,5 V to withstand cold-crank conditions. Additionally, they feature a 200 kHz to 2,2 MHz programmable switching-frequency range, allowing them to operate outside of the AM radio band. These features make the devices suitable for automotive applications such as head units, instrument-cluster displays and car radios. The converters utilise voltage-mode control for stable operation and external compensation so that the loop gain is tailored to optimise component selection and transient response. Integrating an n-channel MOSFET that can be used in a high-side or low-side configuration, they can be configured either as boost or buck converters.

CST Electronics, +27 (0)11 608 0070, lgordon@cstelectronics.co.za, www.cstelectronics.co.za



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