Datasheet > AAT3680

AAT3680

更新时间： 2022-12-26 18:52:05

品牌	Logo	应用领域
AAT		电池控制器
页数	文件大小	规格书
18页	213K
描述
Lithium-Ion/Polymer Linear Battery Charge Controller

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AAT3680 数据手册

AAT3680

Lithium-Ion/Polymer

Linear Battery Charge Controller

Constant Voltage Charging

Charge Cycle Termination, Recharge

Sequence

When the battery voltage reaches V_CHduring con-

stant current mode, the AAT3680 transitions to con-

stant voltage mode. The regulation voltage is fac-

tory programmed: 4.1V and 4.2V are available to

support different anode materials in lithium-ion/poly-

mer cells. In constant voltage operation, the

AAT3680 monitors the cell voltage and terminates

the charging cycle when the voltage across R_SENSE

decreases 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

Shutdown

Shut Down

Mode

V_P> V_UVLO

Mode

Yes

Temperature Test

TS > V_TS1

Temperature

Fault

TS < V_TS2

Yes

Low Current

Yes

Conditioning

Low Current

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

< I_BAT

Mode

R_SENSE

< V_RCH

Charge Complete

Latch Off

Figure 1: AAT3680 Operational Flow Chart.

3680.2006.03.1.6

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

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