AXP209 datasheet(35/45 Pages) ETC2

35 / 45 page

AXP209

Enhanced single Cell Li-Battery and Power System Management IC

Charge termination current settings

0:End when charging current is less than 10% of the set value

1:End when charging current is less than 15% of the set value

3-0

Charge current setting

Icharge= [300+ (Bit3-0) * 100] mA

10.15 REG 34H:Charge Control 2

The default value: 45H

Bit

Description

R / W

Default

value

Pre-charge timeout setting Bit 1

00: 40 min; 01: 50min;

Pre-charge timeout setting Bit 0

10: 60min; 11: 70min

Reserved, can not be changed

CHGLED Mode Selection

0:Constant on when Charging

1:Flashes when charging

3-2

Reserved, can not be changed

1-0

Constant current mode timeout

setting Bit 1-0

00: 6Hours;

01: 8Hours;

10: 10Hours;

11: 12Hours

10.16 REG 35H:Backup battery charge control

The default value: 22H

Bit

Description

R / W

Default

value

Backup battery charge enable control

0:Disable; 1:Enable

6-5

Backup battery voltage target setting

00: 3.1V; 01: 3.0V; 10: 3.6V; 11: 2.5V

4-2

Reserved, can not be changed

1-0

Spare battery charging current is set 00: 50uA; 01: 100uA; 10: 200uA;

11: 400uA

10.17 REG 36H: PEK Key parameter settings

The default value: 9DH

Bit

Description

R / W

Default

value

Confidential

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