NPM1100-CAAA-R datasheet(9/58 Pages) NORDIC

9 / 58 page

Product overview

Function

Input type

Usage reference

VTERMSET

Sets termination voltage

Battery dependent

Static (H/L)

Termination voltage

(VTERMSET) on page

ICHG

Charge current limit

Static (resistor)

Charge current limit

(ICHG) on page 21

ISET

VBUS current limit

Dynamic (H/L)

USB port detection and

VBUS current limiting on

page 15

MODE

BUCK PWM mode

override

Dynamic (H/L)

BUCK mode selection

(MODE) on page 29

VOUTBSETx

Two pin

VOUTB voltage

configuration

Static (H/L)

Output voltage

selection (VOUTBSET0,

VOUTBSET1) on page

SHPACT

Enables Ship mode

Dynamic (H/L)1

Using Ship mode on

page 10

SHPHLD

Disables Ship mode

Dynamic (H/L)1

Using Ship mode on

page 10

Table 2: In circuit configurations

1These pins are level and hold-time controlled.

3.2 System description

The device has the following core components that are described in detail in the respective chapters.

• SYSREG — System regulator on page 15

• CHARGER — Battery charger on page 19

• BUCK — Buck regulator on page 28

The system regulator (SYSREG) is a 5 V LDO supplied by

VBUS. It generates VINT when enabled. VINT is the

internal supply for the device and available on an external pin,

VSYS. SYSREG supports a wide operating

voltage range on

VBUS, tolerates transient voltages up to 20 V, and implements overvoltage protection.

SYSREG also implements configurable current limiting from

VBUS, and USB port detection. When VBUS

is disconnected, SYSREG ensures the device enters Ultra-Low Power mode to minimize quiescent current.

Reverse current protection is enabled when VBUS<VBAT. See SYSREG — System regulator on page 15

for more information and electrical parameters.

The battery charger (CHARGER) is a JEITA compatible linear battery charger for Li-ion/Li-poly batteries.

CHARGER controls the charge cycle using a standard Li-ion charge profile. CHARGER implements dynamic

power-path management regulating current in and out of the battery, depending on system requirements.

Charge current and charge termination voltage can be set via the

ICHG and VTERMSET pins respectively.

LED drivers for charging indication and charging error indication are implemented in CHARGER. See

CHARGER — Battery charger on page 19 for more information and electrical parameters.

The buck regulator (BUCK) is a step-down DC/DC regulator with PWM and hysteretic modes with

automatic control for optimum efficiency and manual enable of PWM mode to reduce voltage ripple

and inductive interference if needed. The output voltage is pin configurable (through

VOUTSET0 and

4445_367 v1.0

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