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LTC4089EDJC Datasheet(PDF) 1 Page - Linear Technology |
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LTC4089EDJC Datasheet(HTML) 1 Page - Linear Technology |
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1 / 24 page  LTC4089/LTC4089-5 1 40895fb HVIN BOOST HVEN IN SW 4.7 µF 10 µF 4.7 µF 1 µF TIMER CLPROG LTC4089 GND PROG HVOUT HVPR OUT BAT 0.1 µF 100k 2k 5V (NOM) FROM USB CABLE VBUS HIGH (6V-36V) VOLTAGE INPUT Li-Ion BATTERY + 1k TO LDOs REGS, ETC. 4089 TAO1 VOUT (TYP) VBAT +0.3V 5V 5V VBAT AVAILABLE INPUT HV INPUT (LTC4089) HV INPUT (LTC4089-5) USB ONLY BAT ONLY 10 µH 0.1 µF , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Burst Mode is a registered trademark of Linear Technology Corporation. Protected by U.S. Patents including 6522118 and 6700364. TYPICAL APPLICATIO USB Power Manager with High Voltage Switching Charger The LTC®4089/LTC4089-5 are USB power managers plus high voltage Li-Ion battery chargers. These devices control the total current used by the USB peripheral for operation and battery charging. Battery charge current is automati- cally reduced such that the sum of the load current and the charge current does not exceed the programmed input current limit. The LTC4089/LTC4089-5 also accommodate high voltage power supplies, such as 12V AC-DC wall adapters, FireWire, or automotive power. The LTC4089 provides an adaptive output that tracks the battery voltage for high efficiency charging from the high voltage input. The LTC4089-5 provides a fixed 5V output from the high voltage input to charge single cell Li-Ion batteries. The charge current is programmable and an end-of-charge status output (CHRG) indicates full charge. Also featured is programmable total charge time, an NTC thermistor input used to monitor battery temperature while charging and automatic recharging of the battery. ■ Portable USB Devices—GPS Receivers, Cameras, MP3 Players, PDAs ■ Seamless Transition Between Power Sources: Li-Ion Battery, USB, and 6V to 36V External Supply ■ High Efficiency 1.2A Charger from 6V to 36V Input with Adaptive Output Control (LTC4089) ■ Load Dependent Charging from USB Input Guarantees Current Compliance ■ 215m Internal Ideal Diode plus Optional External Ideal Diode Controller Provides Low Loss Power Path When External Supply/USB Not Present ■ Constant-Current/Constant-Voltage Operation with Thermal Feedback to Maximize Charging Rate without Risk of Overheating ■ Selectable 100% or 20% Current Limit (e.g., 500mA/ 100mA) from USB Input ■ Preset 4.2V Charge Voltage with 0.8% Accuracy ■ C/10 Charge Current Detection Output ■ NTC Thermistor Input for Temperature Qualified Charging ■ Tiny (6mm 3mm 0.75mm) 22-Pin DFN Package APPLICATIO S FEATURES DESCRIPTIO LTC4089 High Voltage Battery Charger Efficiency BATTERY VOLTAGE (V) 2.5 40 45 55 60 65 90 75 3 3.5 4089 TA01b 50 80 85 70 4 4.5 HVIN = 8V HVIN = 12V HVIN = 24V HVIN = 36V CC CURRENT = 970mA NO OUTPUT LOAD FIGURE 10 SCHEMATIC WITH RPROG = 52k LTC4089-5 LTC4089 |
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