Patent ID: 9331576
Filing Date: 2016-05-03
CPC Classification: H02M

Claim Text:
1. A dual-polarity multiple-output boost converter comprising: a high-side switch having an input and an output, the input to receive an input voltage; an inductor having a first terminal and a second terminal, the first terminal being coupled to the output of the high side switch; a low-side switch having an input and an output, the input of the low-side switch being coupled to the second terminal of the inductor and the output of the low-side switch to be coupled to a reference terminal; a plurality of outputs to provide a plurality of output voltages, the plurality of outputs including a first plurality of outputs to provide a first plurality of different output voltages having a first polarity and at least one second output to provide at least one second output voltage having a second polarity opposite the first polarity; a first plurality of MOSFETs each having an input terminal connected to the second terminal of the inductor and an output terminal connected to a respective one of the first plurality of outputs, the first plurality of MOSFETs including a first MOSFET having a first diode connected between the input terminal and the output terminal of the first MOSFET, each respective MOSFET of the first plurality of MOSFETs other than the first MOSFET being free of any diode between the input terminal and the output terminal of the respective MOSFET; at least one second MOSFET having an input terminal connected to the first terminal of the inductor and an output terminal connected to the at least one second output; and a control circuit, coupled to the high-side switch and the low-side switch, to control an on-time of the high-side switch and the low-side switch.