TI BQ24780SRUYR

The bq24780S device is a high - efficiency synchronous battery charger with a small number of components, suitable for multi - chemistry battery charging applications with limited space. The bq24780S device supports the hybrid boost mode (previously known as the “turbo boost mode”). When the system power demand suddenly exceeds the maximum power level of the adapter, this mode can be used to discharge the system, so that the adapter will not be damaged. The bq24780S device uses two charge pumps to drive N - channel MOSFETs (ACFET, RBFET, and BATFET) respectively to automatically select the system power supply. The system power management microcontroller can program the input current, charging current, discharging current, and charging voltage DAC with high regulation accuracy through the SMBus. The bq24780S device can monitor the adapter current (IADP), battery discharge current (IDCHG), and system power (PMON) so that the host can control the CPU speed reduction or reduce the system power as needed. The bq24780S device can charge 1, 2, 3, or 4 series - connected lithium - ion batteries.

• Industrial innovative charge controller with hybrid boost mode support
• Adapter and battery simultaneously power the system, supporting Intel CPU Turbo mode
• Ultra-fast transient response time of 150μs to enter boost mode
• Hybrid boost mode powered by 4.5V to 24V system supply
• 1 to 4 cells charged by 4.5V to 24V adapter
• High-accuracy power and current monitoring for CPU power saving
• Comprehensive PROCHOT functionality
• ±2% current monitoring accuracy
• ±5% system power monitoring accuracy (PMON)
• Auto-selection of adapter or battery as NMOS power source
• ACFET fast turn-on within 100μs
• Programmable input current, charge voltage, charge and discharge current limits
• ±0.4% charge voltage (16mV step)
• ±2% input current (128mA/step)
• ±2% charge current (64mA/step)
• ±2% discharge current (512mA/step)
• High integration
• Battery LEARN function
• Battery status monitor
• Boost mode indicator
• Loop compensation
• BTST diode
• Enhanced safety features for OVP, OCP, battery, inductor, and MOSFET short-circuit protection
• Real-time system control via ILIM pin for charge and discharge current limiting
• 0.65mA adapter standby quiescent current for Energy Star compliance

• Laptops, ultrabooks, detachable and conventional tablets
• Handheld terminals
• Industrial and medical equipment
• Portable devices