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LTC4110EUHF-PBF Datasheet(PDF) 10 Page - Linear Technology |
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LTC4110EUHF-PBF Datasheet(HTML) 10 Page - Linear Technology |
10 / 52 page LTC4110 10 4110fa BAT (Pin 31): Battery Voltage Sense Input. This pin is used to monitor the battery and control charging voltage through an internal resistor divider connected to this pin that is disconnected in shutdown mode. Also provides a control input for battery ideal diode functions. Pin should be Kelvin- connected to battery to avoid voltage drop errors. DCHFET (Pin 32): Drives the Gate of an External N-MOSFET. Used to drive energy into the battery side of the high ef- ficiency switch mode converter during low loss calibration discharge of the battery. Provides synchronous rectification during battery charging. CHGFET (Pin 33): Drives the Gate of an External N- MOSFET. Used to drive energy into the supply side of the high efficiency switch mode converter during battery charging. Provides synchronous rectification during low loss calibration mode. VDD (Pin 34): Bypass Capacitor Connection for Internal VDD Regulator. Bypass at pin with 100nF low ESR capaci- tor to GND. BATID (Pin 35): Drives the Gate of the Battery P-MOSFET Ideal Diode. Controls low loss ideal diode between the battery and backup load when in backup mode. When not in backup mode, the P-MOSFET is turned off to prevent battery power from back driving into main power. NC (Pin 36): No Connect. DCOUT (Pin 37): System Power Output Voltage Monitor Input. Provides a control input for supply input ideal diode and battery ideal diode functions. Also supplies power to the IC. Bypass at pin with 100nF low ESR capacitor to GND. INID (Pin 38): Drives the Gate of the Supply Input P-MOSFET Ideal Diode. Controls low loss ideal diode between the sup- ply input and backup load when not in backup mode. Exposed Pad (Pin 39): Ground. The Exposed Pad must be soldered to the PCB. PIN FUNCTIONS |
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