BATTERY CHARGER, VOLTAGE MONITORING DEVICE AND SELF-DIAGNOSIS METHOD OF REFERENCE VOLTAGE CIRCUIT

摘要

Disclosed is a battery charger including a battery cell, a reference voltage generating section, an A/D converting section including an A/D converter and a control section. The reference voltage generating section includes a first reference voltage circuit generating a first reference voltage and a second reference voltage circuit generating a second reference voltage equal to the first reference voltage. To diagnose the A/D converter, the first reference voltage circuit is used. To diagnose the first reference voltage circuit, a second A/D conversion value obtained by A/D converting a second divided voltage of the second reference voltage via the A/D converter using the first reference voltage is compared with a first reference value obtained by A/D converting a first divided voltage of the first reference voltage via the A/D converter using the first reference voltage when the first reference voltage circuit is normal.