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LTC4095 - Standalone USB Li-Ion/Polymer Battery Charger in 2mm x 2mm DFN

 

特點(diǎn)

• 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

 

典型應(yīng)用

 

描述

The LTC4095 is a complete constant-current/constantvoltage linear charger for single-cell lithium-ion/polymer batteries. Its small 2mm x 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.

 

應(yīng)用

• PDAs
• Media Players
• Cellular Phones
• Other Portable Electronics

 


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