| 摘要 |
PROBLEM TO BE SOLVED: To maintain reliability and to reduce cost with a comparatively simple structure in a battery charging apparatus charging a trickle. SOLUTION: The battery charging apparatus rectifies secondary induced voltage of a transformer T, sets it as charging voltage of a battery BAT, detects charging voltage and has a switching control part CONT1 which on/off-controls a switching element SW such as a field effect transistor connected to a primary side of the transformer T. The apparatus is provided with a thermistor TH of a thermosensitive resistance element detecting a temperature of the battery BAT and a plurality of resistors R1 to R3 connected in series so that charging voltage of the battery BAT is applied. The thermistor TH is connected in parallel to at least one resistor in partial pressure resistors, the third resistor R3, for example. Voltage of a connecting point of the first resistor R1 and the second resistor R2 in the partial pressure resistors is inputted to the switching control part CONT1. COPYRIGHT: (C)2009,JPO&INPIT
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