BQ24738-BQ738

BQ24738-BQ738

The BQ738 is a 2- to 4-cell Li+ battery SMBus charge controller from Texas Instruments. It is designed to support Intel® CPU Turbo Boost Mode and features a number of advanced features, including:

• Automatic N-Channel MOSFET selection of system power source from adapter or battery driven by I2C interface
• SMBus-controlled NMOS-NMOS synchronous buck converter with programmable 615-, 750-, and 885-kHz switching frequencies
• Power management features such as input current limiting, output voltage regulation, and thermal protection
• Battery safety features such as overcharge protection, overdischarge protection, and short-circuit protection

The BQ738 is a popular choice for battery charge controllers in laptops and other portable devices because of its high integration, advanced features, and small size.

Here are some of the benefits of using the BQ738:

• Improved system performance: The BQ738’s support for Intel® CPU Turbo Boost Mode allows laptops to deliver higher performance when needed.
• Increased power efficiency: The BQ738’s synchronous buck converter helps to improve power efficiency by reducing the power loss associated with switching external switches.
• Enhanced system reliability: The BQ738’s power management and battery safety features help to improve system reliability by protecting the laptop and its battery from damage due to overcharging, overdischarging, or overheating.
• Reduced cost: The BQ738’s high integration helps to reduce the cost of laptops by reducing the number of components needed on the motherboard.

Overall, the BQ738 is a highly integrated, feature-rich battery charge controller that is well-suited for use in laptops and other portable devices.

BQ738 vs BQ735

The BQ738 is very similar to the BQ735, but it has a few additional features:

• It supports a wider range of battery voltages (2.8 V to 4.5 V vs 3.0 V to 4.5 V for the BQ735).
• It has a higher programmable charging current (3 A vs 2.5 A for the BQ735).
• It has a lower power consumption.

In general, the BQ738 is a better choice for laptops and other portable devices that require a high-performance, power-efficient battery charger controller.