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LTC4096 Datasheet(PDF) 11 Page - Linear Technology |
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LTC4096 Datasheet(HTML) 11 Page - Linear Technology |
11 / 16 page LTC4096/LTC4096X 11 4096xf TRICKLE CHARGE* MODE 1/10th FULL CURRENT CHRG STATE: PULLDOWN PWR STATE: DCIN SHUTDOWN MODE IUSBIN DROPS TO 20µA CHRG STATE: Hi-Z PWR STATE: USBIN CHARGE MODE FULL CURRENT CHRG STATE: PULLDOWN PWR STATE: DCIN CHARGE MODE FULL CURRENT CHRG STATE: PULLDOWN PWR STATE: USBIN STANDBY MODE NO CHARGE CURRENT CHRG STATE: Hi-Z PWR STATE: DCIN SHUTDOWN MODE IDCIN DROPS TO 20µA CHRG STATE: Hi-Z PWR STATE: DCIN BAT > 2.9V BAT < 2.9V BAT < 2.9V 2.9V < BAT 2.9V < BAT BAT > 2.9V BAT < 4.15V BAT < 4.15V IBAT < ITERMINATE IN VOLTAGE MODE IBAT < ITERMINATE IN VOLTAGE MODE POWER SELECTION STANDBY MODE NO CHARGE CURRENT CHRG STATE: Hi-Z PWR STATE: USBIN TRICKLE CHARGE* MODE 1/10th FULL CURRENT CHRG STATE: PULLDOWN PWR STATE: USBIN SUSP DRIVEN HIGH SUSP DRIVEN LOW *NOT PRESENT IN THE "X" VERSION SUSP DRIVEN HIGH DCIN POWER REMOVED DCIN POWER REMOVED USBIN POWER REMOVED OR DCIN POWER APPLIED USBIN POWER REMOVED OR DCIN POWER APPLIED DCIN POWER APPLIED ONLY USB POWER APPLIED STARTUP 4096 F01 SUSP DRIVEN LOW Manual Shutdown The SUSP pin has a 3.4M Ω pulldown resistor to GND. A logic low enables the charger and logic high disables it (the pulldown defaults the charger to the charging state). The DCIN input draws 20µA when the charger is in shut- down. The USBIN input draws 20µA during shutdown if no power is applied to DCIN, but draws only 10µA when VDCIN > VUSBIN. Thermal Limiting An internal thermal feedback loop reduces the programmed charge current if the die temperature attempts to rise above a preset value of approximately 115°C. This feature protects the LTC4096 from excessive temperature and allows the user to push the limits of the power handling capability of a given circuit board without risk of damag- ing the device. The charge current can be set according to typical (not worst case) ambient temperature with the assurance that the charger will automatically reduce the current in worst case conditions. A safety thermal shut down circuit will turn off the charger if the die temperature rises above a value of approximately 150°C. DFN power considerations are discussed further in the Applications Information section. APPLICATIONS INFORMATION Figure 1. LTC4096 State Diagram of a Charge Cycle |
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Similar Description - LTC4096 |
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