Title:
DC/DC CONVERTER
Document Type and Number:
Japanese Patent JPS6013469
Kind Code:
A
Abstract:
A DC-DC converter comprises: an inductance (102) for connection at one terminal to a source of DC voltage (VBAT) to be converted; switch means (106) connected to another terminal of the inductance for controlling the passage of current through the inductance; a rectifier (110) having an input connected to the other terminal of the inductance and having an output connected to the output of the converter; a capacitance (112) having a first electrode connected to the output of the rectifier and a second electrode connected to a side of the switch means remote from the inductance; and control means connected to the switch means of controlling the operation thereof in dependence on the voltage at the capacitance to produce a desired converter output voltage, the control means comprising a comparator (116) having a first input connected to a source of reference potential, a second input connected to the second electrode of the capacitance and an output connected to a control input of the switch means.The converter requires no timebase oscillator.The converter may further comprise error feedback means (118) having an input connected to thefirst electrode of the capacitance, and an output connected to the second input of the comparator, the feedback means producing at its output a feedback signal in dependence on an error in the voltage at the first electrode of the capacitance exceeding a predetermined level.
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Inventors:
UORUTAA SHIYUUO
Application Number:
JP12286984A
Publication Date:
January 23, 1985
Filing Date:
June 14, 1984
Export Citation:
Assignee:
MOTOROLA INC
International Classes:
H02M3/156; H02M3/155; (IPC1-7): H02M3/10
Attorney, Agent or Firm:
Kugoro Tamamushi