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LTC4090EDJC-TRPBF Datasheet(PDF) 1 Page - Linear Technology |
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LTC4090EDJC-TRPBF Datasheet(HTML) 1 Page - Linear Technology |
1 / 28 page LTC4090/LTC4090-5 1 4090fa TYPICAL APPLICATION FEATURES APPLICATIONS DESCRIPTION USB Power Manager with 2A High Voltage Bat-Track Buck Regulator The LTC®4090/LTC4090-5 are USB power managers plus high voltage Li-Ion/Polymer battery chargers. The devices control the total current used by the USB peripheral for operation and battery charging. Battery charge current is automatically reduced such that the sum of the load current and the charge current does not exceed the programmed input current limit. The LTC4090/LTC4090-5 also accom- modate high voltage power supplies, such as 12V AC/DC wall adapters, FireWire, or automotive power. The LTC4090 provides a Bat-Track adaptive output that tracks the battery voltage for high efficiency charging from the high voltage input. The LTC4090-5 provides a fixed 5V output from the high voltage input to charge single cell Li-Ion bateries. The charge current is programmable and an end-of-charge status output ( ⎯C⎯H⎯R⎯G) indicates full charge. Also featured are programmable total charge time, an NTC thermistor input used to monitor battery temperature while charging and automatic recharging of the battery. ■ Seamless Transition Between Power Sources: Li- Ion Battery, USB, and 6V to 36V Supply (60V Max) ■ 2A Output High Voltage Buck Regulator with Bat- TrackTM Adaptive Output Control (LTC4090) ■ Internal 215m Ω Ideal Diode Plus Optional External Ideal Diode Controller Provides Low Loss Power Path When External Supply / USB Not Present ■ Load Dependent Charging from USB Input Guaran- tees Current Compliance ■ Full Featured Li-Ion Battery Charger ■ 1.5A Maximum Charge Current with Thermal Limiting ■ NTC Thermistor Input for Temperature Qualified Charging ■ Tiny (3mm × 6mm × 0.75mm) 22-Pin DFN Package ■ HDD-Based Media Players ■ Personal Navigation Devices ■ Other USB-Based Handheld Products ■ Automotive Accessories , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. Bat-Track is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. HVIN BOOST IN SW 4.7 μF 22 μF 4.7 μF 1 μF TIMER CLPROG LTC4090 GND PROG HVOUT HVPR OUT BAT 0.1 μF 270pF 100k 2k 5V WALL ADAPTER USB HIGH (6V-36V) VOLTAGE INPUT VC 59k RT 40.2k Li-Ion BATTERY + 1k LOAD 4090 TAO1 VOUT (TYP) VBAT + 0.3V 5V 5V VBAT AVAILABLE INPUT HV INPUT (LTC4090) HV INPUT (LTC4090-5) USB ONLY BAT ONLY 6.8 μH 0.47 μF LTC4090/LTC4090-5 High Voltage Battery Charger Efficiency VBAT (V) 2.0 70 80 90 4.0 4090 TA01b 60 50 20 40 30 2.5 3.0 3.5 4.5 FIGURE 12 SCHEMATIC WITH RPROG = 52k NO OUTPUT LOAD HVIN = 8V HVIN = 12V HVIN = 24V HVIN = 36V LTC4090 LTC4090-5 |
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