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LTC4096 Datasheet(PDF) 7 Page - Linear Technology |
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LTC4096 Datasheet(HTML) 7 Page - Linear Technology |
7 / 16 page LTC4096/LTC4096X 7 4096xf TEMPERATURE ( °C) –50 –25 050 25 75 100 DCIN UVLO USBIN UVLO 4096 G29 4.10 3.95 3.90 3.85 3.80 3.75 4.05 4.00 3.70 PIN FUNCTIONS DCIN (Pin 1): Wall Adapter Input Supply Pin. Provides power to the battery charger. The maximum supply current is 1.2A. This pin should be bypassed with a 1µF capacitor. USBIN (Pin 2): USB Input Supply Pin. Provides power to the battery charger. The maximum supply current is 1A. This pin should be bypassed with a 1µF capacitor. PWR (Pin 3): Power Present Output. When the DCIN or USBIN pin voltage is sufficient to begin charging (i.e. when the DCIN or USBIN supply is greater than the undervoltage lockout thresholds and at least 100mV or 150mV, re- spectively, above the battery terminal), the PWR pin is connected to the appropriate input through an internal P-channel MOSFET. If sufficient voltage to charge is not present on DCIN or USBIN the PWR pin is high impedance. This output is able to source up to 120mA. ⎯C⎯H⎯R⎯G (Pin 4): Open-Drain Charge Status Output. When the LTC4096 is charging, the ⎯C⎯H⎯R⎯G pin is pulled low by an internal N-channel MOSFET. When the charge cycle is completed, ⎯C⎯H⎯R⎯G becomes high impedance. This output is capable of sinking up to 10mA, making it suitable for driving an LED. SUSP (Pin 5): Charge Enable Input. A logic low on this pin enables the charger. If left floating, an internal 3.4M Ω pull-down resistor defaults the LTC4096 to charge mode. Pull this pin high for shutdown. ITERM (Pin 6): Charge Termination Current Threshold Program. The termination current threshold, ITERMINATE, is set by connecting a resistor, RITERM, to ground. ITERMINATE is set by the following formula: I V R TERMINATE ITERM = 100 When the battery current, IBAT, falls below the termination threshold, charging stops and the ⎯C⎯H⎯R⎯G output becomes high impedance. IUSB (Pin 7): Charge Current Program for USB Power. The charge current is set by connecting a resistor, RIUSB, to ground. When charging in constant-current mode, this pin servos to 1V. The voltage on this pin can be used to measure the battery current delivered from the USBIN input using the following formula: I V R BAT IUSB IUSB = • 1000 TYPICAL PERFORMANCE CHARACTERISTICS Shutdown Supply Current vs Temperature and VUSBIN Undervoltage Lockout Voltage (Falling) vs Temperature TA = 25°C, unless otherwise noted. 4096 G28 60 50 30 40 20 10 0 SUSP = VUSBIN VDCIN = 0V VUSBIN = 4.25V VUSBIN = 5.5V TEMPERATURE ( °C) –50 –25 0 50 25 75 100 |
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Similar Description - LTC4096_15 |
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