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Product details

Parameters

Number of series cells 1 Charge current (Max) (A) 0.5 Operating Vin (Max) (V) 5.5 Cell chemistry Li-Ion/Li-Polymer, Lithium Phosphate/LiFePO4 Battery charge voltage (Min) (V) 3.6 Battery charge voltage (Max) (V) 4.6 Absolute Vin (safety rating) (Max) ((V)) 20 Control topology Linear Control interface I2C Features BAT temp thermistor monitoring (JEITA profile), BAT temp thermistor monitoring (hot/cold profile), IC thermal regulation, Input OVP, Integrated ADC, Integrated LDO, Power Path Operating Vin (Min) (V) 3.4 Rating Catalog open-in-new Find other Battery charger ICs

Package | Pins | Size

DSBGA (YFP) 20 4 mm² 1.655 x 2.055 open-in-new Find other Battery charger ICs

Features

  • Linear battery charger with 1.25-mA to 500-mA fast charge current range
    • 0.5% Accurate I2C programmable battery regulation voltage ranging from 3.6 V to 4.6 V in 10-mV steps
    • Configurable termination current supporting down to 0.5 mA
    • 20-V Tolerant input with typical 3.4-V to 5.5-V input voltage operating range
    • Programmable thermal charging profile, fully configurable hot, warm, cool and cold thresholds
  • PowerPath management for powering system and charging battery
    • I2C Programmable regulated system voltage (PMID) ranging from 4.4V to 4.9V in addition to battery voltage tracking and Input pass-though options
    • Dynamic power path management optimizes charging from weak adapters
    • Advanced I2C control allows host to disconnect the battery or adapter as needed
  • I2C Configurable load switch or up to 150-mA LDO output
    • Programmable range from 0.6 V to 3.7 V in 100-mV steps
  • Ultra low Iddq for extended battery life
    • 10-nA Ship mode battery Iq
    • 400-nA Iq While powering the system (PMID and VDD on)
  • One push-button wake-up and reset input with adjustable timers
    • Supports system power cycle and HW reset
  • 16-Bit ADC
    • Monitoring of charge current, battery thermistor and battery, input and system (PMID) voltages
    • General purpose ADC input
  • Always on 1.8-V VDD LDO supporting loads up to 10 mA
  • 20-Pin 2-mm x 1.6-mm CSP package
  • 12-mm2 Total solution size

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Description

The BQ25155 is a highly integrated battery charge management IC that integrates the most common functions for wearable and portable devices, namely a charger, a regulated output voltage rail for system power, ADC for battery and system monitoring, a LDO, and push-button controller.

The BQ25155 IC integrates a linear charger with PowerPath that enables quick and accurate charging for small batteries while providing a regulated voltage to the system. The regulated system voltage (PMID) output may be configured through I2C based on the recommended operating condition of downstream IC’s and system loads for optimal system operation.

The device supports charge current up to 500 mA and supports termination current down to 0.5 mA for maximum charge. The battery is charged using a standard Li-Ion charge profile with three phases: pre-charge, constant current and constant voltage regulation.

The device integrates advanced power path management and control that allows the device to provide power to the system while charging the battery even with poor adapters. The host may also control the power path through I2C allowing it to disconnect the input adapter and/or battery without physically removing them. The single push-button input eliminates the need of a separate button controller IC reducing the total solution footprint. The push-button input can be used for wake functions or to reset the system.A 16-bit ADC enables accurate battery voltage monitoring and can be used to enable a low Iq gauging to monitor battery health. It can also be used to measure the battery temperature using a thermistor connected to the TS pin as well as external system signals through a pin. The low quiescent current during operation and shutdown enables maximum battery life. The input current limit, charge current, LDO output voltage, and other parameters are programmable through the I2C interface making the BQ25155 a very flexible charging solution. A voltage-based JEITA compatible (or standard HOT/COLD) battery pack thermistor monitoring input (TS) is included that monitors battery temperature and automatically changes charge parameters to prevent the battery from charging outside of its safe temperature range. The temperature thresholds are also programable through I2C allowing the host to customize the thermal charging profile. The charger is optimized for 5-V USB input, with 20-V absolute maximum tolerance to withstand line transients. The device also integrates a linear regulator to provide a quiet rail for radios or processors and can be independently sourced and controlled through I2C.

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Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 10
Type Title Date
* Datasheet BQ25155 I2C Controlled 1-Cell 500-mA Linear Battery Charger With 10-nA Ship Mode, PowerPath With Regulated System (PMID) Voltage, ADC, and LDO datasheet (Rev. A) Jul. 01, 2019
Technical articles Benefits of rechargeable batteries in real-time location system trackers Aug. 10, 2020
Application notes High-Efficiency Charging for TWS Using a 2-Pin Interface Application Report Jun. 18, 2020
Technical articles When to use rechargeable batteries in small battery applications Oct. 01, 2019
Technical articles Overcoming design challenges for low quiescent current in small, battery-powered devices Aug. 29, 2019
Application notes Battery Discharge Implementation in Warm or Hot Temperatures Jul. 02, 2019
Application notes BQ2515x Setup Guide Jun. 18, 2019
User guides BQ2515xEVM User's Guide (Rev. A) Jun. 13, 2019
User guides Small Form Factor Design for BQ25150 Jul. 24, 2018
Technical articles Should I use a linear charger or a switching charger? Oct. 30, 2015

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS Download
document-generic User guide
99
Description
The bq25150EVM evaluation module is an integrated battery charge management IC that integrates the most common functions for wearables devices: Linear charger, regulated output, load switch, manual reset with timer, ADC, ship mode and advanced power path. The low quiescent current during operation (...)
Features
  • Configurable battery charger
  • Multi Point ADC to measure 7 channels
  • Advanced power path to power system through either battery or adapter
  • Programmable hard and soft reset
  • 0.5% accurate battery voltage regulation
  • Wake timers for push button
EVALUATION BOARDS Download
document-generic User guide
99
Description
The BQ25155 evaluation module (EVM) is an integrated battery charge management IC that integrates the most common functions for wearable devices: linear charger, regulated output, load switch, manual reset with timer, ADC, ship mode and advanced powerpath. The low quiescent current during operation (...)
Features
  • Configurable battery charger
  • Multi point ADC to measure 7 channels
  • Advanced powerpath to power system through either battery or adapter
  • Programmable hard and soft reset
  • 0.5% accurate battery voltage regulation
  • Wake timers for push button
INTERFACE ADAPTERS Download
document-generic User guide
199
Description

The EV2400 EVM interface board enables an IBM-compatible or other type PC (with the required driver for its particular platform) to communicate with the Texas Instruments SMBus or I2C interface gas gauges via a Universal Serial Bus (USB) port. In addition to this board, PC software is required to (...)

Features
  • Fully powered from the USB port
  • Optional 5-V port for powering high power voltage drivers (future upgrade)
  • Complete interface between the USB and SMBus, I2C (8/16) interfaces
  • Expansion port for future upgrades

Design tools & simulation

GERBER FILES Download
SLUC670.ZIP (350 KB)
GERBER FILES Download
SLUC680A.ZIP (599 KB)

CAD/CAE symbols

Package Pins Download
DSBGA (YFP) 20 View options

Ordering & quality

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