Power Manager reduces battery charging time.
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Press Release Summary:
Model LTC4410 USB power manager IC comes in ThinSOT(TM) package, which enables simultaneous battery charging and system operation of Li-Ion-powered USB peripheral from USB host. It powers system load directly from USB's 5 V supply. More charging current reduces battery's charging time and ensures full charge while peripheral is connected to host device. LTC4410 ensures that portable device is in compliance with USB overcurrent specifications by keeping current constant from USB port.
Original Press Release:
USB Power Manager Reduces Battery Charging Time
MILPITAS, CA - February 10, 2003 - Linear Technology Corporation introduces the LTC4410, a USB power manager IC in a ThinSOT(TM) package, which enables simultaneous battery charging and system operation of a Li-Ion powered USB peripheral from a USB host. Compared to conventional methods, the LTC4410 powers the system load directly from USB's 5V supply instead of the battery's 3.6V terminal, allowing the battery to charge up to 39% faster. More charging current reduces the battery's charging time and ensures a full charge while the peripheral is connected to the USB host device. By managing the total current consumption, the IC permits a 1-cell Li-Ion battery powered USB peripheral to charge its battery and operate its system circuitry without exceeding a user set current limit. Applications include USB certified Li-Ion powered devices such as portable printers, digital cameras, cell phones, and PDAs.
The LTC4410 ensures that a portable device is in compliance with USB overcurrent specifications by keeping the total current constant from the USB port. This is accomplished by adjusting the charge current relative to the amount of current demanded by the system load. Immediately after the USB cable is detached from the peripheral device, the LTC4410 routes the system load to the battery for seamless and continuous operation of the end-device. The LTC4410's solution uses 15 fewer components than comparable solutions and fits into one fourth the board area. The LTC4410 is offered in a 6-lead ThinSOT package and is used with the LTC4053 Li-Ion battery charger for USB applications or LTC1733 for general purpose Li-Ion battery charging.
Pricing for the LTC4410 starts at $1.20 each in 1,000-piece quantities.
Summary of Features: LTC4410
Manages Total Power between a USB Peripheral and Battery Charger
Reduces Charging Time by Directing More Current to Battery Charger
Minimal Voltage Drop of 100mV at 500mA
Ultra Low Battery Drain of 1uA
Reverse Current Blocking Diode Not Required
Compatible with LTC linear battery chargers: LTC4053 and LTC1733
Overtemperature Protected
ThinSOT 6-lead package
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COMPANY BACKGROUND:
Linear Technology Corporation produces a broad line of high-performance standard linear integrated circuits that support the communications, computing, industrial and automotive markets.
Communication applications include networking and Internet infrastructure, high-speed Digital Subscriber Line and cable modems, cellular telephones and base stations, wireless handheld devices and other emerging communications systems. Computing applications are primarily in notebook PCs, peripherals and portable digital equipment. Industrial applications span from medical and process control to test and measurement. Also provided are ICs for emerging automotive applications in navigation, on-board entertainment and communication systems.
Founded in 1981, the Company went public in May 1986 and has been consistently profitable.
For more information, contact:
Doug Dickinson, Media Relations Manager, ext. 2233
Linear Technology Corporation
1630 McCarthy Boulevard Milpitas, CA 95035-7417
READER SERVICE: Call toll-free 1-800-4-LINEAR (for literature only), or go to the company's web site: www.linear.com
Note: LT, AND LTC are registered trademarks of Linear Technology Corp.
