Sprinter 950mA lithium battery charger automatically selects USB or AC adapter

Sprinter 950mA lithium battery charger automatically selects USB or adapter notebook :Linear Technology Corporation (Linear Technology) introduced two standalone dual-input linear battery charger - LTC4075 and LTC4075X. The device is able to efficiently manage power from two separate ( ie, AC adapter and USB) conducted by a single lithium -ion batteries. The charger uses a constant current / constant voltage algorithm , can deliver up to 950mA of charge current from an AC power adapter or from a USB power supply up to 500mA of charge current , voltage and automatically detects whether access on each input . Both the final float voltage accuracy of charging methods are ± 0.6%.
Which LTC4075X no trickle charge function, which benefits those systems under low battery conditions require more charging current. Applications include PDA, MP3 player, lightweight portable medical and test equipment , and large color screen cell phones.
LTC4075 / X is equipped with a patented thermal regulation circuit which can in no danger of overheating , the charging rate is maximized . The device has a high degree of flexibility , the following parameters can be set by a single resistor : wall adapter supply charge current , USB supply charge current and charge termination current. As a standalone charger , it has a trickle charge function for battery pre-conditioning , and undervoltage lockout, automatic recharge , a charge status indicator , and an indication AC adapter or USB power access and one for the " power access " status output .
LTC4075 / X uses low profile ( 0.75mm) 10 -pin 3 × 3mm DFN package. Since no external MOSFET, sense resistor or blocking diode , so that the total solution footprint is less than 25mm2. To save battery energy storage , LTC4075 in standby and shutdown modes are less than 6uA and 2uA the current drawn from the battery terminals .