BQ25970, BQ25971 I2C Controlled Single Cell High Efficiency 8-A Switched Cap Fast Chargers With ADC

1 Features

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 R_SENSE
- ±1% BAT Temperature
- ±1% BUS Temperature
- ±4°C Die temperature