Device and methods for supplying instant high power to small...

Details Device and methods for supplying instant high power to small... Device and methods for supplying instant high power to small...

2007-11-26

2010-12-14

Tso, Edward (Department: 2858)

Electricity: battery or capacitor charging or discharging

Capacitor charging or discharging

For large capacitance

C320S166000

Reexamination Certificate

active

07852048

ABSTRACT:
The present invention relates to a power supply device of a small arms fire control system or a similar small arms system. The device includes a first current limit part for limiting a low current when power is supplied from a battery, a second current limit part for limiting a high current when the power is supplied from the battery, a Zener diode and a step-up DC-DC boost converter connected to the first and second current limit parts, and adapted to primarily charge a supercapacitor to a battery voltage level and subsequently charge the supercapacitor up to a final voltage that will be supplied to a load, and a microprocessor for checking a power supply state of the system and a voltage of the supercapacitor in real-time and controlling ON/OFF of the first and second current limit parts used in the system. An instant high power is supplied to the load using a variable current limit and multi-step charging method.

REFERENCES:
patent: 5498951 (1996-03-01), Okamura et al.
patent: 2004/0155631 (2004-08-01), Ishizu
patent: 2007/0001651 (2007-01-01), Harvey
ATmega32L Datasheet, Atmel, 8-bit AVR Microcontroller with 32K Bytes In-System Programmable Flash, 347 pages, revision updated Oct. 2006 (www.atmel.com).
Cap-XX Application Note No. 1001: Current-Limit and Low Voltage Lockout Circuit for Portable Devices, 5 pages, Dec. 2001 (www.cap-xx.com).
Cap-XX Application Note No. 1002: Start-Up Current-Limiters for Supercapacitors in PDAs and Other Portabel Devices, 14 pages, Revision 2.1, Feb. 2002 (www.cap-xx.com).
Cap-XX Application Note No. 1003: The Supercapacitor Solution to GPRS and Other Pulsed Loads on CompactFlash and PC Cards, 27 pages, Revision 1.0, Dec. 2002 (www.cap-xx.com).
Cap-XX Application Note No. 1004: Driving High-Power White LED Flash in Camera Phones, 15 pages, Rev. 1.0, May 2005 (www.cap-xx.com).
Cap-XX, How to Use the Current-Limiter Component Calculator Spreadsheet, Companion Spreadsheet Start-up Current-Limiter Application Note No. 1002, 2 pages, (www.cap-xx.com).

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