BQ25890RTWR

The bq25890 and bq25892 are highly integrated 5A switch-mode battery charging management and system power path management devices suitable for lithium-ion and lithium-polymer batteries. These devices support high-input-voltage fast charging. Their low-impedance power paths optimize the efficiency of switch-mode operation, reduce battery charging time, and extend battery life during the discharge phase. The I²C serial interface with charging and system settings makes these devices a truly flexible solution.

Applications

• Smartphones
• Tablets
• Portable networking devices

Key features

• Up to 93% charging efficiency at 2A charge current; up to 91% at 3A charge current
• Optimized for high-voltage input (9V/12V)
• Low-power PFM mode for light-load operation
• USB On-the-Go (OTG) with adjustable output voltage range of 4.5V to 5.5V
• Selectable 500KHz/1.5MHz boost converter with up to 2.4A output current
• 93% boost efficiency at 5V/1A output
• Accurate discontinuous-mode overcurrent protection
• Single input supporting USB input and adjustable high-voltage adapter
• Input voltage range: 3.9V to 14V
• Input current limit (100mA to 3.25A, 50mA resolution) supporting USB2.0, USB3.0 standards and high-voltage adapters
• Maximum power tracking via input voltage limit (up to 14V) for various adapters
• Auto-detection of USB SDP, CDP, DCP, and non-standard adapters (bq25890)
• Input Current Optimizer (ICO) for maximum input power without overloading the adapter
• IR compensation (IRCOMP) between charger output and battery terminal
• Maximum battery discharge efficiency via 11mΩ battery discharge MOSFET with up to 9A discharge current
• Integrated ADC for system monitoring (voltage, temperature, and charge current)
• Instant-on operation with no battery or deeply discharged battery
• Ideal diode operation in battery management mode
• BATFET control supporting transport mode, wake-up, and full system reset
• Flexible autonomous and I²C modes for optimal system performance
• High integration including all MOSFETs, current sensing, and loop compensation
• ±5% charge current regulation
• ±7.5% input current regulation
• Battery temperature sensing for charge mode and boost mode
• Thermal regulation and thermal shutdown