NPM1100-CAAA-R7 datasheet(23/58 Pages) NORDIC

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Core components

6.2.9 Charging indication (CHG) and charging error indication (ERR)

The charging indication pin

CHG and charging error indication pin ERR sink 5 mA of current when active.

They are high impedance when disabled. This is suitable for driving LEDs or connecting to host GPIOs in a

weak pull-up configuration.

ERR

CHG

VSYS

Figure 11: Configuration for connecting to LEDs

ERR

CHG

VOUTB

HOST

Figure 12: Configuration for connecting to a host

Note: To configure both LED indication and connection to a host, the GPIO input voltage range

tolerance must be met, or an external circuit may be required. See Reference circuitry on page

44.

The charging indication pin,

CHG, is active while the battery is charging.

The charging error indication pin,

ERR, is activated when an error occurs, see Charger error conditions on

page 22.

6.2.10 DPPM — Dynamic power-path management

CHARGER manages battery current flow to maintain VINT voltage.

The system load requirements are prioritized over battery charge current when

VBUS is connected and

the battery is charging. The battery is isolated when

VBUS is connected and the battery is fully charged.

SYSREG supplies the load unless the load exceeds SYSREG limits. When

VBUS is disconnected, CHARGER

switches to battery supply.

During charging, if the combined current load (ILOAD) on VINT (including BUCK input current) and

VBAT

(ICHG) exceeds the current provided by SYSREG (ILIM), the battery charge current decreases to maintain the

VINT voltage. The battery charger reduces the current to maintain the internal voltage: VINT = V(

VBAT )+

4445_367 v1.0

NPM1100-CAAA-R7 Datasheet(PDF) 23 Page - Nordic Semiconductor