NASA NTRS · 19940000321
Discrete/PWM Ballast-Resistor Controller
Abstract
Circuit offers low switching loss and automatic compensation for failure of ballast resistor. Discrete/PWM ballast-resistor controller improved shunt voltage-regulator circuit designed to supply power from high-resistance source to low-impedance bus. Provides both coarse discrete voltage levels (by switching of ballast resistors) and continuous fine control of voltage via pulse-width modulation.
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King, Roger J.. 1994-06-01. Discrete/PWM Ballast-Resistor Controller. https://ntrs.nasa.gov/citations/19940000321
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