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LTC4095EDC Datasheet(PDF) 1 Page - Linear Technology |
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LTC4095EDC Datasheet(HTML) 1 Page - Linear Technology |
1 / 16 page LTC4095 1 4095fa TYPICAL APPLICATION FEATURES APPLICATIONS DESCRIPTION Standalone USB Li-Ion/Polymer Battery Charger in 2mm × 2mm DFN The LTC ®4095 is a complete constant-current/constant- voltage linear charger for single-cell lithium-ion/polymer batteries. Its small 2mm × 2mm DFN package and low external component count make the LTC4095 especially well-suited for portable USB power applications. Up to 950mA of charge current may be programmed via a single resistor from the PROG pin to ground. The HPWR pin allows the charge current to be set at 20% or 100% of its full-scale programmed value. An internal safety timer terminates charge current. The final float voltage is preset to 4.2V and held to a tight 0.5% tolerance. Also featured is an NTC thermistor input to monitor battery temperature while charging, a C/10 current detection output, automatic recharge, bad-battery detection and low-battery trickle charge. A thermal feedback loop regulates the charge current to limit the die temperature during high power operation or high ambient thermal conditions. The LTC4095 is available in a tiny, low profile (0.75mm) 8-lead 2mm × 2mm DFN package. ■ Full-Featured Standalone USB Li-Ion/Polymer Battery Charger ■ 100mA to 950mA Programmable Charge Current ■ C/10 Charge Current Detection Output ■ Internal Safety Timer Termination ■ NTC Thermistor Input for Temperature Qualified Charging ■ Preset 4.2V Float Voltage with 0.5% Accuracy ■ Constant-Current/Constant-Voltage Operation with Thermal Feedback ■ Charge Current Monitor Output for Gas Gauging ■ Automatic Recharge ■ Bad-Battery Detection ■ 8.5µA Input Supply Current in Suspend Mode ■ Tiny 8-Lead (2mm × 2mm) DFN Package ■ PDAs ■ Media Players ■ Cellular Phones ■ Other Portable Electronics , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 6522118, 6570372, 6700364. + IN 4095 TA01a Li-Ion BATTERY RPROG 1.74k IN 4.3V TO 5.5V UP TO 7V TRANSIENTS CIN 1 µF LTC4095 CHRG HPWR BAT NTC PROG SUSP GND 500mA Single-Cell Li-Ion Charger |
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