Overview
The Texas Instruments BQ24780SRUYT is a high-efficiency, synchronous battery charger designed for space-constrained, multi-chemistry battery charging applications. This device supports a hybrid power boost mode, previously known as 'turbo boost mode,' which allows the battery to discharge energy to the system when the system's power demand exceeds the adapter's maximum power level. This feature prevents the adapter from crashing and ensures continuous system operation. The BQ24780SRUYT is particularly suited for applications requiring high accuracy power and current monitoring, such as in Intel® CPU turbo mode scenarios.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Operating Voltage (VCC) | 4.5 - 24 | V |
| Battery Voltage Range | 1.024 - 19.2 | V |
| Charge Voltage Regulation Accuracy | ±0.4% (10°C - 85°C), ±0.5% (-40°C - 125°C) | % |
| Current Monitor Accuracy | ±2% | % |
| System Power Monitor Accuracy (PMON) | ±5% | % |
| Switching Frequency | 600 kHz, 800 kHz, 1 MHz | kHz, MHz |
| Adapter Standby Quiescent Current | 0.65 mA | mA |
| Package Type | 28-WQFN Exposed Pad | |
| Number of Pins | 28 | |
| Operating Temperature Range | -40°C to 85°C | °C |
Key Features
- Hybrid Power Boost Mode: Allows the adapter and battery to provide power to the system together, supporting Intel® CPU turbo mode.
- Ultra-Fast Transient Response: Enters boost mode in 150 µs.
- High Accuracy Power and Current Monitoring: Comprehensive PROCHOT profile with ±2% current monitor accuracy and ±5% system power monitor accuracy.
- Automatic NMOS Power Source Selection: Fast turn-on of ACFET in 100 µs.
- Programmable Input Current, Charge Voltage, Charge and Discharge Current Limit: High regulation accuracies through SMBus.
- High Integration: Includes battery LEARN function, battery present monitor, boost mode indicator, loop compensation, and BTST diode.
- Enhanced Safety Features: Overvoltage protection, overcurrent protection, battery, inductor, and MOSFET short-circuit protection.
- Realtime System Control: Limits charge and discharge current through the ILIM pin.
Applications
- Notebook, Ultrabook, Detachable, and Tablet PC.
- Handheld Terminal.
- Industrial and Medical Equipment.
- Portable Equipment.
- Smart Phones.
- Portable Navigation Devices.
- Low-Power Handheld Devices.
- Portable Media Players.
Q & A
- What is the primary function of the BQ24780SRUYT?
The BQ24780SRUYT is a high-efficiency, synchronous battery charger that supports hybrid power boost mode for multi-chemistry battery charging applications. - What is the hybrid power boost mode?
The hybrid power boost mode allows the battery to discharge energy to the system when the system's power demand exceeds the adapter's maximum power level, preventing the adapter from crashing. - What is the accuracy of the current and system power monitoring?
The device offers ±2% current monitor accuracy and ±5% system power monitor accuracy. - What are the switching frequencies supported by the BQ24780SRUYT?
The device supports switching frequencies of 600 kHz, 800 kHz, and 1 MHz. - What safety features does the BQ24780SRUYT include?
The device includes overvoltage protection, overcurrent protection, battery, inductor, and MOSFET short-circuit protection. - What is the operating temperature range of the BQ24780SRUYT?
The operating temperature range is -40°C to 85°C. - How many cells can the BQ24780SRUYT charge?
The device can charge 1 to 4 Li+ cells. - What is the package type of the BQ24780SRUYT?
The package type is 28-WQFN Exposed Pad. - What is the adapter standby quiescent current?
The adapter standby quiescent current is 0.65 mA. - What communication interface does the BQ24780SRUYT use?
The device uses the SMBus interface for communication.
