L6738

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The Texas Instruments L6738 is a monolithic integrated circuit featuring voltage regulators, DC-DC switching controllers, and current-mode pulse width modulators. It has been specifically designed for automotive applications. The chip can be used to design Buck converters with up to 1.5A output current, regulated voltage or current sources, or pre-drivers for H-bridges.

The chip consists of three functional blocks: voltage regulator, DC-DC switching controller and a current-mode PWM. All three of these blocks can operate asynchronously and are independent of each other. The voltage regulator takes a reference voltage from the external source, which is then regulated to an output voltage by the internal voltage reference. The DC-DC switching controller operates by switching the output voltage to match the input voltage. This allows for greater power efficiency and stability when operating at higher voltages. Finally, the current-mode PWM takes in the reference voltage and controls the output switch activation.

The chip can be used to design DC-DC switching controllers with up to 1.5A output current. It is capable of supporting both voltage or current sources, as well as pre-drivers for H-Bridges. The chip also provides overvoltage, undervoltage, overcurrent and overtemperature protection. This ensures the stability and reliability of the system.

The chip has several features that make it suitable for automotive applications. These include an adjustable output undervoltage protection (UVLO) threshold and a programmable shutdown delay. The UVLO threshold can be used to ensure that the chip does not output high voltages and the delay can be used to prevent sudden shut-downs from occurring during start-up. Other features include a programmable soft-start, adjustable dead time, and configurable phase shifting for better regulation.

The L6738 can be used in many different automotive applications. It is suitable for engine control units (ECU), such as those found in modern cars, as well as automotive controllers, power distribution systems, and alternators. This chip can also be used in compute, gaming, and embedded applications. Its low power consumption and high accuracy make it a reliable choice for many different applications.

In conclusion, the Texas Instruments L6738 chip is a feature-packed solution for DC-DC voltage regulation and current-mode pulse width modulation. It has been specifically designed for automotive applications, and its features make it suitable for a variety of other applications as well. With its overvoltage protection, adjustable soft-start and adjustable dead time, it is an excellent choice for a variety of power management needs.

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