Patent
Peak current sharing in a multi-phase buck converter power system
Stuart Pullen,Terry J. Groom +1 more
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TLDR
In this article, a plurality of constant ON-time buck converters are coupled to a common load via a series sense resistor to generate a start signal, which is alternately coupled to the controller on each buck converter.Abstract:
A plurality of constant ON-time buck converters are coupled to a common load. The output of each buck converter is coupled to a common load via a series sense resistor. The regulated output voltage across the common load is compared to a reference voltage to generate a start signal. The start signal is alternately coupled to the controller on each buck converter. The ON-time of a master buck converter is terminated when a ramp signal generated from the regulator input voltage exceeds the reference voltage. All other slave converters have an ON-time pulse started by the start signal and stopped by comparing a sense voltage corresponding to their output current during their ON-time pulse to the peak current in the master converter during its ON-time. A counting circuit with an output corresponding to each of the plurality of buck converters is used to select which buck converter receives the start signal.read more
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Patent
DC/DC converter having a bootstrapped high side driver
John P. Bazinet,John A. O'Connor +1 more
TL;DR: In this article, a synchronous stepdown DC to DC converter includes a bootstrap capacitor monitored by a controller for maintaining a desired bootstrap voltage to drive a high side NMOS switch.
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A voltage step down type dc-dc converter having a coupled inductor
TL;DR: In this paper, an intermediate tap is provided in the free-wheel inductor; the freewheeling current goes out through the tap, and the switch at the main switch side is driven by an N-channel FET (NPN transistor) and a pulse transformer, so that the driving circuit at the rectifying side can be made simple.