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LTC4150 Datasheet(PDF) 1 Page - Linear Technology |
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LTC4150 Datasheet(HTML) 1 Page - Linear Technology |
1 / 12 page LTC4150 1 4150fa APPLICATIO S FEATURES TYPICAL APPLICATIO DESCRIPTIO CURRENT SENSE VOLTAGE (mV) –50 –25 0 25 50 4150 TA01b 0.5 0.4 0.3 0.2 0.1 –0.5 –0.4 –0.3 –0.2 –0.1 0 The LTC ®4150 measures battery depletion and charging in handheld PC and portable product applications. The de- vice monitors current through an external sense resistor between the battery’s positive terminal and the battery’s load or charger. A voltage-to-frequency converter trans- forms the current sense voltage into a series of output pulses at the interrupt pin. These pulses correspond to a fixed quantity of charge flowing into or out of the battery. The part also indicates charge polarity as the battery is depleted or charged. The LTC4150 is intended for 1-cell or 2-cell Li-Ion and 3-cell to 6-cell NiCd or NiMH applications. ■ Battery Chargers ■ Palmtop Computers and PDAs ■ Cellular Telephones and Wireless Modems , LTC and LT are registered trademarks of Linear Technology Corporation. CF – CF + INT 4.7µF CLR CHG DISCHG RL RSENSE POL SHDN 4.7µF CHARGER LOAD SENSE – SENSE + GND LTC4150 µP 4150 TA01a VDD + RL Integral Nonlinearity, % of Full Scale ■ Indicates Charge Quantity and Polarity ■ ±50mV Sense Voltage Range ■ Precision Timer Capacitor or Crystal Not Required ■ 2.7V to 8.5V Operation ■ High Side Sense ■ 32.55Hz/V Charge Count Frequency ■ 1.5µA Shutdown Current ■ 10-Pin MSOP Package Coulomb Counter/ Battery Gas Gauge |
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