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AAT3680IKS-4.1-T1 Datasheet(PDF) 6 Page - Advanced Analogic Technologies |
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AAT3680IKS-4.1-T1 Datasheet(HTML) 6 Page - Advanced Analogic Technologies |
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6 / 18 page  AAT3680 Lithium-Ion Linear Battery Charge Controller 6 3680.2003.4.0.91 Constant Voltage Charging When the battery's voltage reaches VCH during constant-current mode, the AAT3680 transitions to constant-voltage mode. The regulation voltage is factory programmed: 4.1V and 4.2V (or 8.2V and 8.4V for two-cell applications) are available to sup- port different anode materials in Lithium Ion cells. In constant-voltage operation, the AAT3680 moni- tors the cell voltage and terminates the charging cycle when the voltage across RSENSE decreases to approximately 10mV. Charge Cycle Termination, Recharge Sequence After the charge cycle is complete, the AAT3680 latches off the pass device and automatically enters power-saving sleep mode. Either of two possible conditions will bring the IC out of sleep mode: the battery voltage at the BAT pin drops below VRCH (recharge threshold voltage) or the AAT3680 is reset by cycling the input supply through the power-on sequence. Falling below VRCH signals the IC that it is time to initiate a new charge cycle. Figure 1: AAT3680 Operational Flow Chart UVLO Temperature Test TS > V TS1 TS < V TS2 Power On Reset Power On Reset Preconditioning Test Current Phase Test V CH >VBAT V MIN >VBAT V TERM R SENSE <V RCH Voltage Phase Test V P > VUVLO Shut Down Mode Shut Down Mode Yes No Yes Yes Low Current Conditioning Charge Low Current Conditioning Charge (Trickle Charge) Temperature Fault Temperature Fault No No Current Charging Mode Current Charging Mode Yes Voltage Charging Mode Voltage Charging Mode < I BAT No Yes No Charge Complete Latch Off Charge Complete Latch Off |
Similar Part No. - AAT3680IKS-4.1-T1 |
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