Patent ID: 7791322
Filing Date: 2010-09-07
Classification: G05F

Abstract:
1. A direct current-direct current (DC-DC) converting circuit, comprising: an input terminal; a regulating circuit; a bleeder circuit configured to supply a stable divided voltage for the DC-DC converting circuit; an output terminal; a voltage-controlling terminal; and a load; wherein the regulating circuit comprises a transistor, the transistor comprises a base, an emitter, and a collector, the emitter is connected to the input terminal, the base is connected to the voltage-controlling terminal, the collector is connected to the output terminal via the bleeder circuit, and the output terminal is grounded via the load, the bleeder circuit comprises two diodes connected in parallel, each of the two diodes comprises an anode connected to the collector of the transistor, and a cathode connected to the output terminal.