NPM1100-CAAA-R7 datasheet(21/58 Pages) NORDIC

21 / 58 page

Core components

6.2.3 Termination voltage (VTERMSET)

The termination voltage, VTERM, is set using

VTERMSET to support two values of battery charging

termination voltage.

VTERMSET

VTERM threshold

LOW

4.1 V

HIGH

4.2 V

Table 10: VTERMSET

6.2.4 Termination and trickle charge current

Termination current and trickle charge current are set to a percentage of the charge current limit (ICHGLIM).

See Electrical parameters on page 24 for the limits.

6.2.5 Charge current limit (ICHG)

The charge current limit is set between 20 mA and 400 mA by connecting the RICHG resistor to the

ICHG

and

AVSS pins.

The following equation gives the resistance to be connected based on the ICHGLIM.

The following apply when the RICHG resistor is between 0 Ω and 30 kΩ.

• ICHGLIM is the fast charge current limit in Amps

• RICHG is the resistance to be connected between the

ICHG and AVSS pins in Ω

Common values are provided in the following table.

RICHG resistor value

Nominal charge current limit,

ICHGLIM

Error

0 (short to

AVSS)

400 mA

± ICHGACC%

1.5 kΩ

200 mA

± (ICHGACC + RICHGACC)%

4.7 kΩ

100 mA

± (ICHGACC + RICHGACC)%

11 kΩ

50 mA

± (ICHGACC + RICHGACC)%

30 kΩ

20 mA

± (ICHGACC + RICHGACC)%

Table 11: Common charge current values

Note: ICHGLIM must be set at or below the safe charge current limit of the battery according to the

battery specification.

6.2.6 Battery thermal protection using NTC thermistor (NTC)

Battery thermal protection is implemented in the following two ways.

4445_367 v1.0

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