nPM1100-EK: Linear Lithium-ion/Lithium-Polymer Battery Charger with Power Management

Summary

The nPM1100 is a dedicated power management IC (PMIC) with a highly efficient dual-mode configurable buck regulator and integrated battery charger. It is designed as a complementary component to Nordic’s nRF52® Series and nRF53® Series System-on-Chips (SoCs) to ensure reliable power delivery and stable operation, whilst maximizing battery life through high efficiency and low quiescent currents. It can also be used as a generic PMIC device for any other suitable application. Its extremely compact form factor makes it ideal for advanced wearables, connected medical devices, and other size constrained applications. PCB area usage can be as low as 23 mm².

The integrated battery charger is designed to charge lithium-ion and lithium-polymer batteries on a termination voltage selectable to 4.1 or 4.2 V supporting cell chemistries with a nominal voltage of 3.6 and 3.7 V, respectively. It includes battery thermal protection and automatic selection of three charging modes: automatic trickle, constant current and constant voltage. The maximum charge current is resistor selectable from 20 mA up to 400 mA. The charger also features a discharge current limitation and is JEITA compliant. The PMIC is USB compatible and allow for charging batteries through USB, with automatic port detection.

The highly efficient step-down buck regulator can deliver up to 150 mA of current at a selectable output voltage of 1.8, 2.1, 2.7 or 3.0 V. It features soft startup and automatic transition between hysteretic and PWM modes. It also allows for forced PWM mode to ensure clean power operation. The power conversion efficiency goes up as far as to 92 % while maintaining a small footprint of only 27 mm², including passive components.

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The nPM1100 Evaluation Kit (EK) is a tool for evaluating the nPM1100 PMIC and evaluate its features for your application. The kit features switches for all selectable settings, buttons to enter and exit ship mode and connectors for batteries, USB and headers for all pins on the PMIC.

The EK allows for testing of the nPM1100 PMICs capabilities with existing applications without the need for creating custom hardware. The board supports charging batteries and powering applications with the included headers and battery connectors.

Features:

  • 400 mA battery charger

  • Highly efficient buck regulator

  • Input regulator that supports USB charging

  • Low quiescent currents

  • Requires no software to operate

  • I/O- Pin headers to all pins on nPM1100

  • I/O- USB connector & battery connectors

  • LEDs for charge and error indication

  • Switches for ICHRG, VTERM, ISET, VOUTB and MODE

  • Buttons to enter and exit ship mode

  • JEITA compliant

  • Automatic USB port detection

Specifications

Manufacturer
Category Power Management
Sub-Category Battery Chargers
Eval Board Normally In Stock
Cell Type Lithium Ion, Li-Ion
Lithium Polymer, Li-Pol
Configuration 1 Cell
Voltage In 4.1 ~ 6.7 V
5 V
Voltage Out 4.1 V
4.2 V
Current Out 20 ~ 400 mA
Features Cell Temperature Monitoring
Current Limit (Adj. or Fixed)
DC/DC Converter(s), On-Chip
ESD Protection
Fault Indication
Soft Start
Quiescent Current [Typical] 800 nA
Sleep Mode Current [Typical] 460 nA
Component Count + Extras 37 + 14
Application / Target Market Battery Chargers
Medical
Portable Devices
RF: Internet of Things (IoT) Sensor Node
Wearable Devices
White Goods
Design Author Nordic Semiconductor
Main I.C. Base Part nPM1100
Quiescent Current [Maximum] - Not Given
Sleep Mode Current [Maximum] - Not Given
Date Created By Author 2021-09
Date Added To Library 2021-12