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DC DC Converters

DC to DC converters convert DC power from one voltage level to another. Generally, the output voltage is adjustable, allowing for voltage scaling to meet the specific requirements of each application. Because the power is converted rather than passed through, it eliminates the energy losses associated with a Pass-Through or Performance power supply, which is used to achieve the same result.

PT6708A is a DC/DC converter specifically designed to provide a wide input voltage range with a programmable output voltage. It is widely used in industrial, medical, automotive, military and other applications. It can operate from a 3V to 35V DC input, and can produce an output voltage from 0.8V to 24V with an output current of 20A.

The PT6708A is highly integrated, making it both cost-effective and easy to use. It features a wide input voltage range, high efficiency, short turn-on/off time, and a low standby power consumption. It is capable of controlling the voltage and current of the output by using a microcontroller or an external control signal.

Working Principle

The PT6708A works on the principle of pulse width modulation (PWM) to convert a direct current (DC) input voltage into a precise output voltage. A PWM signal varies the duty cycle, or the ratio of the pulse width to the total period, to control the voltage and current of an output. The signal is generated by the application specific control circuit (ASIC) inside the PT6708A.

The ASIC uses a single-stage, synchronous-rectified buck topology to both convert and regulate the output voltage and current. This topology allows the PT6708A to maintain a precise output voltage despite variations in input voltage, load current and temperature. It also helps the PT6708A to minimize output ripple and EMI noise.

The PT6708A also provides an enable/disable feature and thermal protection against overload. The enable/disable feature allows the PT6708A to be turned on or off remotely, while the thermal protection prevents the converter from entering a fault condition if it becomes overheated.

Application Field

The PT6708A is a very versatile DC/DC converter, and is used in a wide variety of applications. The output voltage and current of the PT6708A are programmable, allowing it to be used in applications that require a precise voltage and current. It is often used in industrial and medical applications, such as medical imaging, scientific instrumentation, laboratory automation, industrial process control, and point-of-sale systems.

The higher input voltage range of the PT6708A also makes it suitable for automotive, military, and other ruggedized applications. Its high efficiency and low standby power consumption make it an ideal solution for power-sensitive applications.

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