SW6208

Bidirectional Fast Charge Power Bank

Copyright © 2022, ZHUHAI ISMARTWARE TECHNOLOGY CO., LTD.

May, 2022 - DS046_v1.5

15

9.17. NTC Function

The SW6208 integrates NTC function. It monitors battery temperature and protects when battery

temperature is abnormal. NTC Pin will source a current to a NTC thermistor of 103AT, and measure

the voltage to calculate battery temperature. NTC Pin will source 80uA for higher accuracy when NTC

thermistor is in low resistance, and 40uA for wider range in high resistance. It sources 80uA in default

mode. When NTC voltage is higher than 2.712V, it changes to 40uA; When NTC voltage is lower than

0.718V, it changes to 80uA.

While using a typical NTC thermistor of 103AT, protection threshold and NTC voltage in discharge

mode is as below:

Threshold Description

NTC Temperature/℃

NTC Voltage/V

NTC Current/uA

NTC Low Temperature Protection

-20

2.711

40

NTC High Temperature Regulation

55

0.283

80

NTC High Temperature Protection

60

0.242

80

Protection threshold and NTC voltage in Charge mode is as below:

Threshold Description

NTC Temperature/℃

NTC Voltage/V

NTC Current/uA

NTC Low Temperature Protection

0

2.182

80

NTC JEITA Low Temperature for

Reducing Current

5

1.764

80

NTC JEITA Low Temperature for

Returning to Normal

10

1.437

80

NTC JEITA High Temperature for

Returning to Normal

40

0.466

80

NTC JEITA High Temperature for

Reducing Target Voltage

45

0.393

80

NTC High Temperature Protection

50

0.333

80

Resisters can be in series or parallel with the NTC thermistor to change the protection temperature