Method and apparatus for programmably adjusting output voltage o

Details Method and apparatus for programmably adjusting output voltage o Method and apparatus for programmably adjusting output voltage o

1996-08-29

1998-06-30

Tso, Edward

Electricity: battery or capacitor charging or discharging

Battery or cell charging

Pulsed

320164, H02J 704, H02J 716

Patent

active

057739633

ABSTRACT:
An apparatus for programmably adjusting output voltage of a constant-voltage battery charger is disclosed. The present invention includes a power circuit for generating an output voltage for charging batteries. This power circuit generates this output voltage as a function of an incoming power source and an incoming error signal. The invention further includes a controller for providing a pulse width modulated (PWM) signal operating at a pre-determined frequency. This PWM signal controls the effective divider ratio of a voltage divider network which is implemented, among other things, for generating the error signal to be fed to the power circuit. The present invention varies the effective divider ratio by programmably applying the pulse width modulated signal from the controller. As a result, the output voltage from the power circuit can be varied to optimally charge batteries of differing types and technologies.

REFERENCES:
patent: 4924169 (1990-05-01), Shifflet et al.
patent: 5477132 (1995-12-01), Canter et al.
patent: 5554921 (1996-09-01), Li et al.
patent: 5557192 (1996-09-01), Tamai
patent: 5561361 (1996-10-01), Sangupta et al.
patent: 5617007 (1997-04-01), Keidl et al.

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