초록 ▼

A power distribution system is provided for distributing power in a portable device being coupable to a charging system and including a main battery power and a bridge battery power. The charging system is coupled to a power bus through a diode. The main battery power system and the bridge battery s

A power distribution system is provided for distributing power in a portable device being coupable to a charging system and including a main battery power and a bridge battery power. The charging system is coupled to a power bus through a diode. The main battery power system and the bridge battery system are also both coupled to the power bus through diodes. The predetermined voltage level is set with respect to the charging system, the main battery and the bridge battery, such that if all three are coupled to the bus, the recharging system both powers the unit and recharges the main battery. If the recharging system is removed, the main battery power system powers the portable device, and if the main battery power system is removed the bridge battery will provide power to the portable device. The distribution system also includes a monitoring system for measuring the predetermined charge level on the battery and disabling a FET switch, so that the main battery stops charging to protect the main battery against overcharging. A monitoring system is also provided for monitoring the voltage level of the main battery utilizing a comparator system.

대표청구항 ▼

[ What is claimed is:] [35.] A power distribution system for a providing power to functional and power circuitry on a portable device, comprising;a main battery system coupled to a power bus through a main battery diode;a charging system coupled to the power bus through a charger diode; anda bridge

[ What is claimed is:] [35.] A power distribution system for a providing power to functional and power circuitry on a portable device, comprising;a main battery system coupled to a power bus through a main battery diode;a charging system coupled to the power bus through a charger diode; anda bridge battery system coupled to the power bus through a bridge battery diode;wherein the charging system has a voltage level that is at a predetermined level above a voltage level of the main battery system and the voltage level of the bridge battery system is lower than the voltage level of the main battery system, such that if the charging system is present the charger diode is forward biased and the charging system provides power to the power bus, if the charging system is not present the main battery diode becomes forward biased and the main battery system provides power to the power bus and if the charging system and the main battery system are not present the bridge battery diode becomes forward biased and the bridge battery system provides power to the power bus.