Product category:
Power Supply ICs and Controllers
News Release from: Linear Technology Corp | Subject: LTC4075HVX
Edited by the Electronicstalk Editorial
Team on 10 September 2007
Battery manager takes care of two
charging sources
Single-chip charger can deliver up to 950mA of charge current from a wall adapter supply, or up to 850mA of charge current from a USB supply.
Available now from Linear Technology, the LTC4075HVX is a stand-alone dual-input linear battery charger for single-cell Li-ion/polymer batteries that manages separate wall adapter and USB power sources Using a constant-current/constant-voltage algorithm, the charger can deliver up to 950mA of charge current from a wall adapter supply, or up to 850mA of charge current from a USB supply and automatically sense the presence of voltage at each input
This article was originally published on Electronicstalk on 28 Jul 2004 at 8.00am (UK)
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The final float voltage accuracy is +/-0.6% in either case.
The LTC4075HVX provides protection up to 22V on both inputs.
If the selected power source exceeds the overvoltage lockout limit, the LTC4075HVX will stop charging.
The LTC4075HVX disables the trickle charge function, benefiting systems requiring higher charge current during low battery conditions.
Applications include PDAs, MP3 players, lightweight portable medical and test equipment and large colour screen cell phones.
The LTC4075HVX is equipped with a patented thermal regulation scheme that maximises the charging rate without the risk of overheating.
The device is extremely flexible, enabling programmability via a single resistor of wall adapter supply charge current, USB supply charge current and charge termination current.
As a stand-alone charger, the LTC4075HVX simplifies design, as no external microprocessor is required for charge termination.
The IC features undervoltage lockout, automatic recharge, charge status and "power present" status indication.
The LTC4075HVX draws less than 12uA of current from the battery terminal in both standby and shutdown modes, preserving battery energy.
It is offered in a low profile (0.75mm) 10-lead 3 x 3mm DFN package.
The total solution footprint is less than 25mm2 as no external MOSFET, sense resistor or blocking diode is required.
The LTC4075HVX is rated for operation from -40 to +85C.
1000-piece pricing begins at US $2.00 each. Request a free brochure from Linear Technology Corp ...
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