Overview
The BQ24780S, produced by Texas Instruments, is a high-efficiency, synchronous battery charge controller 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 and adapter to provide power to the system together, particularly beneficial for Intel® CPU Turbo Mode. It features ultra-fast transient response and automatic system power source selection, making it ideal for various portable and industrial applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 4.5 - 24 | V |
| Number of Cells Supported | 1 - 4 | - |
| Switching Frequency | 600 kHz, 800 kHz, 1 MHz | - |
| Charge Voltage Accuracy | ±0.4% (16-mV step) | - |
| Input Current Accuracy | ±2% (128-mA/step) | - |
| Charge Current Accuracy | ±2% (64-mA/step) | - |
| Discharge Current Accuracy | ±2% (512-mA/step) | - |
| System Power Monitor Accuracy (PMON) | ±5% | - |
| Package Type | WQFN-28 | - |
| Package Size | 4.00 × 4.00 mm² | - |
| Operating Temperature Range | -40 to 85 °C | - |
Key Features
- Industrial innovative charge controller with hybrid power boost mode for Intel® CPU Turbo Mode.
- Ultra-fast transient response of 150 µs to enter boost mode.
- High accuracy power and current monitoring for CPU throttling with comprehensive PROCHOT profile.
- Automatic NMOS power source selection from adapter or battery with ACFET fast turn-on in 100 µs.
- Programmable input current, charge voltage, charge, and discharge current limits.
- High integration including battery LEARN function, battery present monitor, boost mode indicator, loop compensation, and BTST diode.
- Enhanced safety features for overvoltage protection, overcurrent protection, battery, inductor, and MOSFET short-circuit protection.
- Real-time system control on ILIM pin to limit charge and discharge current.
- Low adapter standby quiescent current of 0.65 mA for Energy Star 2 applications.
Applications
- Notebook, Ultrabook, Detachable, and Tablet PC.
- Handheld Terminal.
- Industrial and Medical Equipment.
- Portable Equipment.
Q & A
- What is the primary function of the BQ24780S?
The BQ24780S is a high-efficiency, synchronous battery charge controller that supports hybrid power boost mode.
- What is hybrid power boost mode?
Hybrid power boost mode allows the battery and adapter to provide power to the system together, particularly useful for Intel® CPU Turbo Mode.
- What is the input voltage range for the BQ24780S?
The input voltage range is from 4.5 to 24 volts.
- How many cells can the BQ24780S charge?
The device can charge 1 to 4 Li+ cells.
- What are the switching frequencies available for the BQ24780S?
The switching frequencies are 600 kHz, 800 kHz, and 1 MHz.
- What is the accuracy of the charge voltage?
The charge voltage accuracy is ±0.4% with a 16-mV step.
- Does the BQ24780S have safety features?
Yes, it includes overvoltage protection, overcurrent protection, battery, inductor, and MOSFET short-circuit protection.
- What is the package type and size of the BQ24780S?
The package type is WQFN-28, and the size is 4.00 × 4.00 mm².
- What are the typical applications of the BQ24780S?
Typical applications include notebooks, handheld terminals, industrial and medical equipment, and portable equipment.
- How does the BQ24780S monitor system power?
The device monitors adapter current, battery discharge current, and system power for CPU throttling and system power reduction.
