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U.S. Department of Energy
Office of Scientific and Technical Information

DC stepped up voltage transformerless battery charger

Patent ·
OSTI ID:5277793
A battery charger that takes energy from a battery and steps-up the voltage to charge another battery. The direct current, going into the charger's circuit goes through the voltage regulator and then to a switching voltage regulator (the integrated circuit) and a few external components which generates the energy to charge the output capacitor. The output capacitor voltage is controlled by a resistive voltage divider network, and energy stored in the output capacitor is transferred through a diode and a current limiter to charge the battery.
Assignee:
EDB-85-147403
Patent Number(s):
US 4510431
OSTI ID:
5277793
Country of Publication:
United States
Language:
English