NPM1100-CAAA-R datasheet(19/58 Pages) NORDIC

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Core components

Figure 8: VSYS voltage vs. VBUS voltage, ILIM=100 mA

6.2 CHARGER — Battery charger

The battery charger is suitable for any general purpose applications with lithium-ion/lithium-polymer

battery types.

The main features of the battery charger are the following:

• Linear charger for Li-ion/Li-poly battery chemistries

• Configurable charge current with a resistor connected to the

ICHG pin (from 20 mA to 400 mA)

• Bidirectional power FET for dynamic power-path management

• Active current limitation when

VBAT supplies VINT

• Selectable termination voltage of 4.1 V or 4.2 V through the

VTERMSET pin

• Automatic trickle, constant current, constant voltage, and end-of-charge/recharge cycle

• JEITA compliant battery thermal protection (NTC) with standard and extended temperature range

6.2.1 Charging cycle

Battery charging starts after a

VBUS connection and battery detection, see Battery detection and UVLO on

page 20.

If a battery is found, trickle charging begins. Fast charging starts when the battery voltage is above

VTRICKLE_FAST. After the battery voltage reaches VTERM, the charger enters constant voltage charging. The

battery voltage is maintained while monitoring current flow into the battery. When the current into the

battery drops below ITERM, charging is complete. The charger waits until the battery voltage is below

VRECHARGE before starting a new charging cycle.

4445_367 v1.0

NPM1100-CAAA-R Datasheet(PDF) 19 Page - Nordic Semiconductor