Datasheet > AAT3680ITP-4.1-T1

AAT3680ITP-4.1-T1

更新时间： 2022-11-25 10:05:25

品牌	Logo	应用领域
ANALOGICTECH		电池控制器
页数	文件大小	规格书
18页	266K
描述
Lithium-Ion Linear Battery Charge Controller

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AAT3680

Lithium-Ion Linear Battery Charge Controller

Constant Voltage Charging

Charge Cycle Termination, Recharge

Sequence

When the battery's voltage reaches V_CHduring

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 R_SENSEdecreases to

approximately 10mV.

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 V_RCH

(recharge threshold voltage) or the AAT3680 is reset

by cycling the input supply through the power-on

sequence. Falling below V_RCHsignals the IC that it

is time to initiate a new charge cycle.

Power On Reset

UVLO

Shut Down

Mode

V_P> V_UVLO

Mode

Yes

Temperature Test

TS > V_TS1

Temperature

Fault

TS < V_TS2

Yes

Low Current

Yes

CoLnodwitiConuirnregnt

Preconditioning Test

V_MIN> V_BAT

Charge

Conditioning

(TrickleChCahragrege)

Current

Charging

Mode

Current Phase Test

V_CH> V_BAT

Mode

Voltage

Phase Test

V_TERM

Voltage

Charging

Mode

< I_BAT

R_SENSE

Mode

< V_RCH

Charge Complete

Latch Off

Figure 1: AAT3680 Operational Flow Chart

3680.2003.4.0.91

1...3 4 567 8 9...18

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