Battery operated power supply with low voltage start circuit

Details Battery operated power supply with low voltage start circuit Battery operated power supply with low voltage start circuit

1989-01-09

1990-10-09

Salce, Patrick R.

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

323349, 323901, 363 49, G05F 144

Patent

active

049623494

ABSTRACT:
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.

REFERENCES:
patent: 3299347 (1967-01-01), Torii
patent: 4246634 (1981-01-01), Purol
patent: 4595873 (1986-06-01), Musil
patent: 4626766 (1986-12-01), Musil
patent: 4695785 (1987-09-01), Mieth et al.
patent: 4740742 (1988-04-01), Gontowski, Jr.

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