AS3701 datasheet(27/110 Pages) AMSOSRAM

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[v1-11] 2016-Dec-14

AS3701 − Detailed Description – Power Management Functions

setting of the bit eoc_current [ChargerCurrentControl]). If the

measured charge current is less than or equal to eoc_current,

the charging cycle is terminated and EOC [ChargerStatus1] is set.

Resume

If EOC is reached and the bit AutoResume [ChargerControl] is set,

the charging will immediately start again, if the battery voltage

falls below the specified resume voltage ChVoltResume

[ChargerConfig1]. This voltage can be set either to 3.33% or

5.56% of ChVoltEOC [ChargerVoltageControl].

Figure 31:

Resume Voltage Levels

Figure 32:

Linear Charger States

Charging States: This figure describes the characteristics of the charging current and the battery voltage for each

different charging state.

ChVoltResume

ChVoltEOC

3.82V

3.84V

…

4.20V

…

4.42V

4.44V

3.33%

127mV

128mV

…

140mV

…

147mV

148mV

5.56%

212mV

213mV

…

233mV

…

246mV

247mV

External Charger

at pin VUSB

5.5V max

VCHDET

Battery Voltage

(VBAT)

Charging

Current

Regulator

Voltages

XRES

after enabling the charger

I2C communication possible

t (not to scale)

11mA – 130mA

44mA – 493mA

2.9V

3.3% or

5.6% of

VEOC

Trickle Current

Constant Current Constant Voltage

EOC

Resume

ICHGOFF

3.82V – 4.44V

5% of CC –

50% of CC

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