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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LTC4012-1 датащи(PDF) 1 Page - Linear Technology |
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LTC4012-1 датащи(HTML) 1 Page - Linear Technology |
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1 / 28 page  1 4012f LTC4012/ LTC4012-1/LTC4012-2 FEATURES APPLICATIONS DESCRIPTION High Efficiency, Multi-Chemistry Battery Charger with PowerPath Control The LTC4012 is a constant-current/constant-voltage battery charger controller. It uses a synchronous quasi-constant frequency PWM control architecture that will not generate audible noise with ceramic bulk capacitors. Charge current is set by external resistors and can be monitored as an output voltage. With no built-in termination, the LTC4012 family charges a wide range of batteries under external control. The LTC4012 features fully adjustable output voltage, while the LTC4012-1 and LTC4012-2 can be pin-programmed for Lithium-Ion/Polymer battery packs of 1-, 2-, 3- or 4-series cells. The LTC4012-1 provides output voltage of 4.1V/cell and the LTC4012-2 is a 4.2V/cell version. The device includes AC adapter input current limiting, which maximizes charge rate for a fixed input power level. An external sense resistor programs the input current limit, and the ICL status pin indicates reduced charge current as a result of AC adapter current limiting. Ideal diode control at the adaptor input improves charger efficiency. The CHRG status pin is active during all charging modes, including special indication for low charge current. n General Purpose Battery Charger Controller n Efficient 550kHz Synchronous Buck PWM Topology n ±0.5% Output Float Voltage Accuracy n Programmable Charge Current: 4% Accuracy n Programmable AC Adapter Current Limit: 3% Accuracy n No Audible Noise with Ceramic Capacitors n INFET Low Loss Ideal Diode PowerPath™ Control n Wide Input Voltage Range: 6V to 28V n Wide Output Voltage Range: 2V to 28V n Indicator Outputs for AC Adapter Present, Charging, C/10 Current Detection and Input Current Limiting n Analog Charge Current Monitor n Micropower Shutdown n 20-Pin 4mm × 4mm × 0.75mm QFN Package n Notebook Computers n Portable Instruments n Battery Backup Systems Efficiency at DCIN = 20V L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. PowerPath is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents including 5723970. CLP FROM ADAPTER 13V TO 28V 0.1μF 5.1k 25mΩ 3.01k 0.1μF 6.8μH 20μF 33mΩ INFET 0.1μF 2μF 0.1μF 6.04k 26.7k LTC4012 DCIN ACP CHRG ICL SHDN ITH PROG CLN BOOST TGATE SW INTVDD BGATE TO/FROM MCU GND CSP CSN BAT FBDIV VFB 20μF POWER TO SYSTEM 4.7nF 32.8k 4012 TA01 12.3V Li-Ion BATTERY 3.01k 301k + CHARGE CURRENT (A) 0 70 75 80 85 90 100 100 1000 10000 0.5 1 1.5 2 4012 TA02 2.5 3 95 PART LTC4009 LTC4012 INFET X DCDIV X PIN NAME VOUT = 12.3V RSENSE = 33mΩ RIN = 3.01k RPROG = 26.7k EFFICIENCY POWER LOSS TYPICAL APPLICATION |
Аналогичный номер детали - LTC4012-1 |
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Аналогичное описание - LTC4012-1 |
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ссылки URL |
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