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TC110303ECTTR Application Field and Working Principle

The TC110303ECTTR is a synchronous buck converter controller designed for power supplies that require a high degree of system integration. This integrated circuit is a member of Texas Instruments\' Power Management System (PMS) family, which offer solutions for all types of power management applications. The TC110303ECTTR has gained wide acceptance due to its high level of integration, low profile package, and ability to regulate a wide range input voltage range.

Features and Benefits

The TC110303ECTTR offers various features and benefits, including:

• Low profile package: The TC110303ECTTR is available in a 4-pin, 0.5mm lead-free DFN package that is specifically designed for space efficient applications.
• Integrated high side and low side switches: The integrated high and low side switches reduce system component count and simplify circuit design.
• Wide input voltage range: The device is capable of operating with a wide input voltage range from 3.3V to 20V.
• Built-in sleep and shutdown modes: The device offers two shutdown modes (low current sleep and high current shutdown) for improved system power management.
• Driving 30V external buck switching MOSFETs: The external MOSFETs are driven by the push-pull outputs for improved system efficiency.
• Frequency compensation filter option: The optional frequency compensation filter reduces ripple current.
• On- chip VTT regulator: The on-chip VTT regulator reduces system component count and simplifies design.

Application Fields

The TC110303ECTTR is suitable for use in applications such as charging systems, battery-backed systems, DC-DC converters, industrial systems, and notebook computers. The device integrates a synchronous buck boost converter that is capable of converting a wide input voltage range into a range up to 25V. This flexibility allows the device to be used in a wide range of systems, including portable applications with wide input voltage range.

Working Principle

The TC110303ECTTR is a synchronous buck converter controller that can be used in various types of applications. The device consists of a high side driver and a low side driver, which are used to control the ON and OFF times of the buck converter. The device also includes a frequency compensation filter, which reduces ripple current.

The high side driver and the low side driver are both active when the Enable pin is asserted (active high). The Enable pin is asserted when an external voltage level is applied. The high and low side drivers turn ON and turn OFF the buck converter, respectively. The ON period of the buck converter is controlled by the duty cycle setting of the low side driver, while the OFF period is determined by the duty cycle setting of the high side driver.

The frequency compensation filter reduces output ripple current and provides improved system stability. The filter is configured by connecting a resistor and capacitor between the FC pin and the ground. The resistor value determines the frequency of the filter, while the capacitor value determines the amount of the output ripple current.

The TC110303ECTTR also includes an on-chip VTT regulator. The VTT regulator reduces system component count and simplifies design. The VTT regulator is connected to the input voltage and provides an output voltage that is regulated to a predetermined value.

Conclusion

The TC110303ECTTR is a synchronous buck converter controller that is suitable for use in applications such as charging systems, battery-backed systems, and DC-DC converters. The device integrates a high side driver and a low side driver and also includes a frequency compensation filter and an on-chip VTT regulator. The device offers a wide input voltage range from 3.3V to 20V and can be used in systems with a wide input voltage range.

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