PT6203N

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DC-DC converters are electronic devices that convert direct current (DC) input power into a higher or lower DC output power. PT6203N is a programmable dc-dc converter integrated with a microcontroller which performs various functions such as communication, parameter setting, monitoring, protection, and system optimization. Therefore, PT6203N is an ideal choice for applications that require sophisticated control and monitoring such as telecommunications, industrial automation, medical, and automotive.

Application Field

PT6203N can be used in various applications involving non-isolated DC-DC power conversion. It is designed for high efficiency operations, low ripple and noise, wide input voltage range, and current mode control with output voltage and current adjustable. With its programmable microcontroller, it offers a comprehensive solution for various system applications, it makes the design process simpler and faster, reduces total BOM cost, and improves system performance.

• Telecommunications and Server Power Supply: Rail-to-rail output voltage ranges from 0V to 12V, enabling the design of low-voltage and high-power system. Its PFC module provides stable input voltage and ensures that the system can operate with higher efficiency.
• Industrial Automation and Medical Equipment: PT6203N comes with a programmable microcontroller, which can be used to set parameters, monitor, protect, and optimize system performances accordingly. It is designed to work stably under EMI environments.
• Automotive Electronics: The wide input voltage range of PT6203N allows it to work with various conditions such as start/stop or low/high battery input, making it reliable for automotive applications in terms of startup or operation.

Working Principle

PT6203N provides regulated output voltage with its constant voltage control function. It continuously adjusts its voltage gain according to feedback voltage from the output, therefore allowing it to maintain a constant output voltage despite changes in load or input supply. Voltage and current loop controls are employed to accurately achieve the desired output voltage and current. In addition, it also offers many features to enhance efficiency, such as burst mode, maximum current limit, soft start, and output voltage selection.

PT6203N uses a voltage feedback loop consisting of an error amplifier, opto-coupler, and a divider resistor network. This loop monitors the output voltage and compares it to a reference voltage. Any difference between the two voltages signals the error amplifier to adjust the output voltage via the control output.

PT6203N also contains a current loop which monitors the output current. It compares the output current to the current limit setting by employing an internal current sense resistor, and adjusts its gain accordingly. With a single output current limit setting, it is able to provide maximum output current and current sharing capability.

Through its current and voltage loops, PT6203N is able to maintain a constant output voltage no matter what the load conditions are. It is designed for high efficiency operations, low ripple and noise, wide input voltage range, and current mode control.

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