04962349 is referenced by 11 patents and cites 7 patents.

A circuit arrangement for feeding a load (3) from a low voltage energy source (1) via a direct-voltage conversion circuit (2). The direct-voltage conversion circuit periodically takes energy from the energy source by means of a main switching element (10) and supplies this energy as an increased supply voltage (at 12) to the load via an inductive element (9) and a rectifier (11). A starting switching element (15) takes energy for generating the supply voltage (at 12) from the energy source during a starting phase. The circuit arrangement is simple and compact and the energy losses produced are so low that it is economic to use it for energizing a small appliance particularly a small domestic appliance, from a battery or a rechargeable accumulator. A main control circuit (13) is supplied with energy directly from the supply voltage (at 12) and periodically controls the main switching element. A starting control circuit (16) is fed directly and exclusively from the energy source and periodically controls the starting switching element (15) so that is switching periods are shorter than those of the main switching. The starting control circuit, and thus the starting switching element, are switched off when the supply voltage reaches a predetermined value.

Title
Battery operated power supply with low voltage start circuit
Application Number
7/296268
Publication Number
4962349
Application Date
January 9, 1989
Publication Date
October 9, 1990
Inventor
Hubert C Raets
Nieuwenhagen
NL
Manfred Albach
Aachen
DE
Agent
Bernard Franzblau
Assignee
U S Philips Corporation
NY, US
IPC
G05F 1/44
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