Title:
MULTIOUTPUT SWITCHING REGULATOR
Document Type and Number:
Japanese Patent JPS57211618
Kind Code:
A
Abstract:
PURPOSE:To obtain plural high-precision output voltages with economical constitution, by selecting outputs of a transformer having plural secondary windings in time division and controlling a common switching element synchronously with this selection by different pulse widths. CONSTITUTION:An input voltage is inputted to a transformer 21 through a rectifying and smoothing circuit 1 and a switching element 5. The transformer 21 has plural windings in the secondary side, and the outputs of the trnsformer 21 are selected by selecting switches 16A-16C and are rectified by rectifiers 3A- 3C and are smoothed by smoothing circuits 4A-4C to output DC voltages V01- V03 to terminals 12A-12C, respectively. These output voltages are compared with a reference voltage from a reference voltage generator 13 in differential amplifiers 10A-10C, and their differences are amplified and are inputted to a multiplexer MX17. Switches 16A-16C select the outputs of the transformer 21 in time division by selecting signals S1-S3 from a selection output controlling circuit, and the MX 17 selects outputs of amplifiers 10A-10C synchronously with this selection and inputs them to a pulse width converting circuit 7. Signals different in pulse width are outputted in time division from the circuit 7 by the output of an integrating network 8, thus controlling the element 5.
Inventors:
OOMORI SHIGERU
Application Number:
JP9716581A
Publication Date:
December 25, 1982
Filing Date:
June 23, 1981
Export Citation:
Assignee:
FUJI ELECTRIC CO LTD
FUJI FACOM SEIGIYO
FUJI FACOM SEIGIYO
International Classes:
G05F1/56; H02M5/27; (IPC1-7): G05F1/64