DC1695B

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DC1695B evaluation boards from Texas Instruments are designed to allow users to evaluate the performance of the company’s high-reliability TPS54170 synchronous buck converter. These boards allow designers to rapidly deploy fixed-frequency, high-efficiency designs to production stages. The DC1695B boards also provide the capability to adjust different outputs of the converter, permitting a wide range of current levels over different operating conditions that eliminate the need to re-design a board.

The DC1695B evaluation board is designed to accept a 2.5V to 5.5V input voltage and is capable of delivering up to 3A of continuous current at an adjustable output voltage between 0.9V and 5V. The converter utilizes current-mode PWM control, providing fast transient response and high peak efficiency up to 93%. The efficiency of the board can be adjusted by adjusting the output voltage and enabling or disabling the synchronous rectifier. These features enable an efficient conversion of the incoming voltage to the desired output while minimizing losses.

The DC1695B evaluation board is an easy-to-use platform that enables rapid prototyping with minimal setup and effort. The board has several features that make it suitable for a wide range of applications. These features include an isolated power supply, adjustable output voltage, adjustable switching frequency, and an overtemperature shutdown. These features allow the board to be used in applications such as automotive, industrial, instrumentation, power supply, and telecom.

The DC1695B evaluation board is simple to configure and operate. The board is configured by connecting the incoming voltage to the pins marked “VIn” and connecting the pins marked “VOut” to the desired output voltage level. The board can also be configured using the provided jumper settings for different operating conditions. The board is powered using the provided external power supply.

The DC1695B evaluation board utilizes synchronous buck topology, which combines the output inductor and transistor into a single device. When operating in this mode, the output voltage is set using the output voltage control pin, which is connected to the voltage control module. The voltage controller signals the switching transistor to switch on or off, which in turn causes the output voltage to change. The output voltage is maintained by the feedback loop. The feedback loop is monitored by the voltage control module and an active error amplifier, and the output voltage is adjusted based on the signals received from these components.

The DC1695B evaluation board also features over-temperature protection, which adds an additional layer of safety when operating the board in demanding environments. The TPS54170 has an integrated over-temperature protection circuit, which triggers a circuit shut down if the die temperature is too high; however, the board itself also has a thermal cut-off circuit, which turns off the board when the temperature exceeds a certain threshold. This additional layer of protection ensures a safe and reliable operation of the board.

In conclusion, the DC1695B evaluation board from Texas Instruments is an efficient and easy-to-use platform for evaluating the performance of the TPS54170 synchronous buck converter. The board provides adjustable output voltage and switching frequency, enabling a wide range of applications to be tested and debugged quickly. The board also features over-temperature protection, which provides additional safety when running the board in demanding environments. As such, the DC1695B evaluation board is an ideal platform for rapidly prototyping and deploying fixed-frequency, high-efficiency designs.

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