BQ25970 Series

I2C 1cell 8A switched cap battery charger for Parallel Charging Application and external OVP support

Link to Manufacturer Page: https://www.ti.com/

Catalog

I2C 1cell 8A switched cap battery charger for Parallel Charging Application and external OVP support

Part	Mounting Type	Number of Cells	Supplier Device Package [y]	Supplier Device Package [x]	Supplier Device Package	Charge Current - Max [Max]	Interface	Fault Protection	Battery Chemistry	Battery Pack Voltage [Max]	Voltage - Supply (Max) [Max]	Operating Temperature [Max]	Operating Temperature [Min]	Package / Case
Texas Instruments BQ25970YFFT	Surface Mount	1	2.93	3.33	56-DSBGA	8 A	I2C	Over Current, Over Voltage	Multi-Chemistry	4.65 V	12 V	85 °C	-40 °C	56-UFBGA, DSBGA
Texas Instruments BQ25970YFFR	Surface Mount	1	2.93	3.33	56-DSBGA	8 A	I2C	Over Current, Over Voltage	Multi-Chemistry	4.65 V	12 V	85 °C	-40 °C	56-UFBGA, DSBGA

Key Features

• 97% Efficient power stage for 8-A fast chargePatent pending switched cap charger architecture optimized for 50% duty cycleInput voltage is 2x battery voltage (3.5 V to 4.65 V)Output current is 2x of input current (up to4.5 A)Reduces power loss across the cableIntegrated programmable protection features for safe operationInput over-voltage protection (BUS_OVP)Input over-current protection (BUS_OCP) with adjustable alarmInput over-voltage with external OVP FET (VAC_OVP up to 17 V, BQ25970 only)Battery over-voltage protection (BAT_OVP) with adjustable alarmOutput over-voltage (VOUT_OVP)Input over-current protection (BUS_OCP) with adjustable alarmIBAT over-current protection (BAT_OCP) with adjustable alarmSwitching MOSFET cycle by cycle current limitBattery temperature monitoringConnector Temperature MonitoringProgrammable settings for system optimizationOptional VBATREG and IBATREG regulation for system load and wall adapter transients (BQ25970 only with External OVP FET)STAT, FLAG, and MASK options for interruptsADC Readings and configurationIntegrated 12-bit effective analog-to digital converter (ADC)±0.5% BUS Voltage±0.5% VOUT Voltage–0.4% to 0.2% BAT Voltage with differential sensing±1.5% BAT Current at 6 A with external RSENSE±1% BAT Temperature±1% BUS Temperature±4°C Die temperature97% Efficient power stage for 8-A fast chargePatent pending switched cap charger architecture optimized for 50% duty cycleInput voltage is 2x battery voltage (3.5 V to 4.65 V)Output current is 2x of input current (up to4.5 A)Reduces power loss across the cableIntegrated programmable protection features for safe operationInput over-voltage protection (BUS_OVP)Input over-current protection (BUS_OCP) with adjustable alarmInput over-voltage with external OVP FET (VAC_OVP up to 17 V, BQ25970 only)Battery over-voltage protection (BAT_OVP) with adjustable alarmOutput over-voltage (VOUT_OVP)Input over-current protection (BUS_OCP) with adjustable alarmIBAT over-current protection (BAT_OCP) with adjustable alarmSwitching MOSFET cycle by cycle current limitBattery temperature monitoringConnector Temperature MonitoringProgrammable settings for system optimizationOptional VBATREG and IBATREG regulation for system load and wall adapter transients (BQ25970 only with External OVP FET)STAT, FLAG, and MASK options for interruptsADC Readings and configurationIntegrated 12-bit effective analog-to digital converter (ADC)±0.5% BUS Voltage±0.5% VOUT Voltage–0.4% to 0.2% BAT Voltage with differential sensing±1.5% BAT Current at 6 A with external RSENSE±1% BAT Temperature±1% BUS Temperature±4°C Die temperature

Description

The BQ2597x is a 97% efficient, 8-A battery charging solution using a switched cap architecture. This architecture and the integrated FETs are optimized to enable a 50% duty cycle, allowing the cable current to be half the current delivered to the battery, reducing the losses over the charging cable as well as limiting the temperature rise in the application. The dual-phase architecture reduces the input cap requirements as well as reducing the output voltage ripple. When used with a standard charger such as the BQ2589x, the system enables the fastest charging at the lowest power loss from pre-charge through CC, CV, and termination. The device integrates all the necessary protection features to ensure safe charging, including input over-voltage and over-current protection, output over-voltage and over-current protection, temperature sensing for the battery and cable, and monitoring the die temperature. The device includes a 12-bit effective analog-to-digital converter (ADC) to provide bus voltage, bus current, output voltage, battery voltage, battery current, bus temperature, bat temperature, die temperature, and other calculated measurements needed to manage the charging of the battery from the smart wall adapter or power bank. The BQ2597x is a 97% efficient, 8-A battery charging solution using a switched cap architecture. This architecture and the integrated FETs are optimized to enable a 50% duty cycle, allowing the cable current to be half the current delivered to the battery, reducing the losses over the charging cable as well as limiting the temperature rise in the application. The dual-phase architecture reduces the input cap requirements as well as reducing the output voltage ripple. When used with a standard charger such as the BQ2589x, the system enables the fastest charging at the lowest power loss from pre-charge through CC, CV, and termination. The device integrates all the necessary protection features to ensure safe charging, including input over-voltage and over-current protection, output over-voltage and over-current protection, temperature sensing for the battery and cable, and monitoring the die temperature. The device includes a 12-bit effective analog-to-digital converter (ADC) to provide bus voltage, bus current, output voltage, battery voltage, battery current, bus temperature, bat temperature, die temperature, and other calculated measurements needed to manage the charging of the battery from the smart wall adapter or power bank.