Abstract: An upgradable SMART (Self-Monitoring Analysis and Reporting Technology) battery pack capable of upgrading a SMART function thereof is provided, including a battery array, a host interface for supplying power to a host and performing a SMART communication therewith, a protection circuit for protecting battery cells in the battery array from overcurrent or overvoltage, a microprocessor for monitoring a current state of the battery array, calculating a battery capacity thereof and controlling the SMART communication with the host via the host interface, a nonvolatile memory for storing an operational program of the microprocessor and battery information, a signal processor for converting a level of a signal to be sent to the host via the host interface into a predetermined level that is desired by the host and processing the level-converted signal, and an input/output port for performing an interfacing operation between the host and the microprocessor to download a control program and data from the host.

Abstract: Herein disclosed is an upgradable SMART (Self-Monitoring Analysis and Reporting Technology) battery pack which is capable of upgrading a SMART function thereof. The upgradable SMART battery pack comprises a battery array, a host interface for supplying power to a host and performing a SMART communication therewith, a protection circuit for protecting battery cells in the battery array from overcurrent or overvoltage, a microprocessor for monitoring a current state of the battery array, calculating a battery capacity thereof and controlling the SMART communication with the host via the host interface, a nonvolatile memory for storing a program necessary to an operation of the microprocessor and unique battery information, and a signal processor for converting a level of a signal to be sent to the host via the host interface into that desired by the host and processing the level-converted signal.

Abstract: A power supply for both alternating current (AC) and direct current (DC) which has an AC/DC converter and DC/DC converter detachably coupled with each other. The AC/DC converter is adapted to convert an AC input voltage into a DC signal, and the DC/DC converter is adapted to convert a DC input voltage into a DC signal. An output voltage selector is provided to obtain a DC output voltage appropriate to an associated device. The present power supply can be conveniently carried, supply power to an associated device regardless of AC and DC input voltages and select a level of an output DC voltage. Therefore, the present power supply can be used universally irrespective of the types of associated devices and manufacturers.

Abstract: A power supply for both alternating current (AC) and direct current (DC) which has an AC/DC converter and DC/DC converter detachably coupled with each other. The AC/DC converter is adapted to convert an AC input voltage into a DC signal, and the DC/DC converter is adapted to convert a DC input voltage into a DC signal. An output voltage selector is provided to obtain a DC output voltage appropriate to an associated device. The present power supply can be conveniently carried, supply power to an associated device regardless of AC and DC input voltages and select a level of an output DC voltage. Therefore, the present power supply can be used universally irrespective of the types of associated devices and manufacturers.