TPS61220EVM-319

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Introduction:
TPS61220EVM-319 is a high voltage DC to DC synchronous buck regulator evaluation module. It is designed to evaluate and demonstrate the performance of the integrated circuit TPS61220. This evaluation module features a 2.6 A wide input voltage range synchronous buck converter. It is packaged in a 5 by 7 mm QFN package. The regulator offers up to 95% efficiency and can operate in a wide range of input and output voltages from 3.3 V to 28 V.

Application field:
TPS61220EVM-319 is typically used for a variety of applications where energy efficiency, low noise, and high power density are required, such as in telecom applications, including point-of-load (POL) regulators, ultra-low voltage memory and FPGA power supplies. As a synchronous buck regulator, it is also suitable for medical and industrial applications. For example, it can be useful for output regulation of digital supplies for DSPs, MCUs, etc. It is ideal for use in lithium-ion battery charging applications due to its wide input range and high efficiency. The chip is also commonly used for automotive applications, due to its high efficiency, low stand-by power, and range of output current.

Working Principle:
The TPS61220EVM-319 is based on a buck converter topology. A buck regulator is typically used for step-down regulation and power converters. It reduces the input voltage to a lower level at the output. The converter is based on the principle of inductor-capacitor (LC) resonant charging and discharging circuit. The TPS61220EVM-319 utilizes the advantages of a synchronous buck converter, which is a type of buck converter that allows for current biasing to reduce voltage losses across the high-side switch. This also enables the device to have high power density and high efficiency. The synchronous buck converter contains two transistors, i.e., a high-side and low-side switch, which regulate the power transfer from the input to the output. The pulse-width modulation (PWM) signal is used to control the switching of the transistors.

The TPS61220EVM-319 is a synchronous buck for high-voltage applications. It is designed to convert input voltages of 3.3 V to 28 V into output voltages of 0.5 V to 4.2 V with up to 95% efficiency. The operating frequency of the buck regulator can be set from 200 kHz to 1.5 MHz via a clock enable pin. The PWM signal is applied to the high-side switch for regulation of the output current in order to meet the load requirements. If the load current decreases, the output voltage will increase due to the reduction in the switching frequency. The device supports up to a 2.6 A output current.

The device also features a system status monitor and a programmable current limit. The system status monitor allows monitoring of the output voltage, input voltage, and temperature. The current limit is adjustable up to 2.6 A and it initiates a backed-off current-mode control when the set current limit is exceeded. The current limit is also adjustable from 0.34 A to 2.6 A using the I2C interface.

In addition, the TPS61220EVM-319 includes a wide range of protection features such as output overvoltage protection, overcurrent protection, thermally foldback current limit, and undervoltage lockout. These features ensure that the device is well protected against any voltage or current surge in the system.

Conclusion:
The TPS61220EVM-319is a high voltage DC to DC synchronous buck regulator designed for a wide range of applications. It is suitable for use in high efficiency, low noise, and high power density applications. The chip features a wide input voltage range and can operate in a wide range of input and output voltages. It is also especially suitable for battery charging applications due to its wide input and high efficiency. The device includes a system status monitor, programmable current limit, and wide range of protection features, such as output overvoltage protection, overcurrent protection, thermally foldback current limit, and undervoltage lockout.

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