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BQ25970

Texas Instruments
Part Number BQ25970
Manufacturer Texas Instruments
Description 8-A Switched Cap Fast Chargers
Published Dec 9, 2021
Detailed Description Product Folder Order Now Technical Documents Tools & Software Support & Community BQ25970, BQ25971 SLUSD72B – NOVEM...
Datasheet PDF File BQ25970 PDF File

BQ25970
BQ25970

Overview
Product Folder Order Now Technical Documents Tools & Software Support & Community BQ25970, BQ25971 SLUSD72B – NOVEMBER 2017 – REVISED APRIL 2020 BQ25970, BQ25971 I2C Controlled Single Cell High Efficiency 8-A Switched Cap Fast Chargers With ADC 1 Features •1 97% Efficient power stage for 8-A fast charge • Patent pending switched cap charger architecture optimized for 50% duty cycle – Input voltage is 2x battery voltage (3.
5 V to 4.
65 V) – Output current is 2x of input current (up to 4.
5 A) – Reduces power loss across the cable • Integrated programmable protection features for safe operation – Input over-voltage protection (BUS_OVP) – Input over-current protection (BUS_OCP) with adjustable alarm – Input over-voltage with external OVP FET (VAC_OVP up to 17 V, BQ25970 only) – Battery over-voltage protection (BAT_OVP) with adjustable alarm – Output over-voltage (VOUT_OVP) – Input over-current protection (BUS_OCP) with adjustable alarm – IBAT over-current protection (BAT_OCP) with adjustable alarm – Switching MOSFET cycle by cycle current limit – Battery temperature monitoring – Connector Temperature Monitoring • Programmable settings for system optimization – Optional VBATREG and IBATREG regulation for system load and wall adapter transients (BQ25970 only with External OVP FET) – STAT, FLAG, and MASK options for interrupts – ADC Readings and configuration • Integrated 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 2 Applications • Smartphone • Tablet PC 3 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 cha...


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