BQ25120F3A Series

300-mA linear battery charger with Power Path, integrated LDO and buck converter 1.8V default output

Catalog

300-mA linear battery charger with Power Path, integrated LDO and buck converter 1.8V default output

Part	Interface	Charge Current - Max [Max]	Operating Temperature [Min]	Operating Temperature [Max]	Package / Case	Battery Pack Voltage	Programmable Features	Number of Cells	Battery Chemistry	Voltage - Supply (Max)	Fault Protection	Current - Charging	Supplier Device Package	Mounting Type	Voltage - Supply (Max) [Max]	Supplier Device Package [y]	Supplier Device Package [x]	Utilized IC / Part	Secondary Attributes	Function	Type	Primary Attributes	Supplied Contents
Texas Instruments BQ25120YFPR	I2C	300 mA	-40 °C	125 ¯C	25-XFBGA DSBGA	4.2 V	Current	1	Lithium Ion/Polymer	5.5 V	Over Temperature Over Voltage Short Circuit	Constant - Programmable	25-DSBGA	Surface Mount
Texas Instruments BQ25120F3AYFPR	I2C	300 mA	-40 °C	85 °C	25-XFBGA DSBGA	4.35 V	Current Timer Voltage	1	Lithium Ion/Polymer		Over Current Over Temperature Over Voltage Short Circuit	Constant - Programmable	25-DSBGA	Surface Mount	20 V	2.47	2.53
Texas Instruments BQ25120YFPT	I2C	300 mA	-40 °C	125 ¯C	25-XFBGA DSBGA	4.2 V	Current	1	Lithium Ion/Polymer	5.5 V	Over Temperature Over Voltage Short Circuit	Constant - Programmable	25-DSBGA	Surface Mount
Texas Instruments BQ25120AEVM																		BQ25120A	Graphical User Interface (GUI) I2C Interface(s)	Battery Charger	Power Management	Li-Ion / Li-Pol (1 Cell)	Board(s) Cable(s)
Texas Instruments BQ25120F3AYFPT	I2C	300 mA	-40 °C	85 °C	25-XFBGA DSBGA	4.35 V	Current Timer Voltage	1	Lithium Ion/Polymer		Over Current Over Temperature Over Voltage Short Circuit	Constant - Programmable	25-DSBGA	Surface Mount	20 V	2.47	2.53
Texas Instruments BQ25120AYFPR	I2C	300 mA	-40 °C	125 ¯C	25-XFBGA DSBGA	4.2 V	Current	1	Lithium Ion/Polymer	5.5 V	Over Temperature Over Voltage Short Circuit	Constant - Programmable	25-DSBGA	Surface Mount
Texas Instruments BQ25120AYFPT	I2C	300 mA	-40 °C	125 ¯C	25-XFBGA DSBGA	4.2 V	Current	1	Lithium Ion/Polymer	5.5 V	Over Temperature Over Voltage Short Circuit	Constant - Programmable	25-DSBGA	Surface Mount

Catalog

300-mA linear battery charger with Power Path, integrated LDO and buck converter 1.8V default output

Key Features

• Increases system operation time between chargesConfigurable 300-mA buck regulator (1.8-V default)700-nA (typical) Iq with buck converter enabled (no load)Configurable load switch or 100-mA LDO output ( LDO by default. VLDO 1.8-V)Up to 300-mA charge current for fast charging. I2C programmable up to 200 mA, external resistor setting for 200 mA to 300 mA.0.5% Accurate battery voltage regulation (configurable from 3.6 V to 4.65 V in 10-mV steps) 4.35-V defaultConfigurable termination current down to 500 µASimple voltage based battery monitorWatchdog timer disabledTS WARM fault disabled (no reduction in battery regulation voltage)Highly integrated solution with small footprint2.5-mm x 2.5-mm WCSP Package and six external components for minimal solutionPush-button wake-up and reset with adjustable timersPower path management for powering the system and charging the batteryPower path management enables < 50 nA Ship Mode battery quiescent current for longest shelf lifeBattery charger operates from 3.4 V – 5.5 VIN(5.5-V OVP / 20-V tolerant)Dedicated pins for input current limit, charge current, termination current, and status outputI2C communication controlCharge voltage and currentTermination thresholdInput current limitVINDPM ThresholdTimer optionsLoad switch controlSystem output voltage adjustmentLDO output voltage adjustmentIncreases system operation time between chargesConfigurable 300-mA buck regulator (1.8-V default)700-nA (typical) Iq with buck converter enabled (no load)Configurable load switch or 100-mA LDO output ( LDO by default. VLDO 1.8-V)Up to 300-mA charge current for fast charging. I2C programmable up to 200 mA, external resistor setting for 200 mA to 300 mA.0.5% Accurate battery voltage regulation (configurable from 3.6 V to 4.65 V in 10-mV steps) 4.35-V defaultConfigurable termination current down to 500 µASimple voltage based battery monitorWatchdog timer disabledTS WARM fault disabled (no reduction in battery regulation voltage)Highly integrated solution with small footprint2.5-mm x 2.5-mm WCSP Package and six external components for minimal solutionPush-button wake-up and reset with adjustable timersPower path management for powering the system and charging the batteryPower path management enables < 50 nA Ship Mode battery quiescent current for longest shelf lifeBattery charger operates from 3.4 V – 5.5 VIN(5.5-V OVP / 20-V tolerant)Dedicated pins for input current limit, charge current, termination current, and status outputI2C communication controlCharge voltage and currentTermination thresholdInput current limitVINDPM ThresholdTimer optionsLoad switch controlSystem output voltage adjustmentLDO output voltage adjustment

Description

The bq2512x is a highly integrated battery charge management IC that integrates the most common functions for wearable devices: Linear charger, regulated output, load switch, manual reset with timer, and battery voltage monitor. The integrated buck converter is a high efficiency, low IQswitcher using DCS control that extends light load efficiency down to 10-µA load currents. The low quiescent current during operation and shutdown enables maximum battery life. The device supports charge currents from 5 mA to 300 mA. The input current limit, charge current, buck converter output voltage, LDO output voltage, and other parameters are programmable through the I2C interface. The battery is charged using a standard Li-Ion charge profile with three phases: precharge, constant current and constant voltage. A voltage-based JEITA compatible 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 charger is optimized for 5-V USB input, with 20-V tolerance to withstand line transients. The buck converter is run from the input or battery. When in battery only mode, the device can run from a battery up to 4.65 V. A configurable load switch allows system optimization by disconnecting infrequently used devices. The manual reset with timer allows mutliple different configuration options for wake are reset optimization. A simple voltage based monitor provides battery level information to the host in 2% increments from 60% to 100% of the programmed V(BATREG). The bq2512x is a highly integrated battery charge management IC that integrates the most common functions for wearable devices: Linear charger, regulated output, load switch, manual reset with timer, and battery voltage monitor. The integrated buck converter is a high efficiency, low IQswitcher using DCS control that extends light load efficiency down to 10-µA load currents. The low quiescent current during operation and shutdown enables maximum battery life. The device supports charge currents from 5 mA to 300 mA. The input current limit, charge current, buck converter output voltage, LDO output voltage, and other parameters are programmable through the I2C interface. The battery is charged using a standard Li-Ion charge profile with three phases: precharge, constant current and constant voltage. A voltage-based JEITA compatible 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 charger is optimized for 5-V USB input, with 20-V tolerance to withstand line transients. The buck converter is run from the input or battery. When in battery only mode, the device can run from a battery up to 4.65 V. A configurable load switch allows system optimization by disconnecting infrequently used devices. The manual reset with timer allows mutliple different configuration options for wake are reset optimization. A simple voltage based monitor provides battery level information to the host in 2% increments from 60% to 100% of the programmed V(BATREG).