STOD13CTPUR

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With the popularity of portable electronic products, the STOD13CTPUR is a highly popular special purpose voltage regulator in the power electronic market. It is a three-terminal voltage regulator integrated with a patented constant on-time pulse width modulation (PWM) controller topology and a high current output MOSFET. It provides a high-efficiency, low-noise and simple-to-use voltage regulation solution.

Application Field of STOD13CTPUR

The STOD13CTPUR is widely used in many applications, such as distributed power systems, motor drives, railway systems, battery powered systems, portable medical applications, dimmable LED controllers, and industrial instrumentation. Its on-time controlled PWM topology can be used for synchronous or asynchronous buck and boost converters, where a constant frequency is needed, and where low-noise, high-efficiency, and high-current regulation is required. Moreover, with its high current output and low noise, the STOD13CTPUR enables the most demanding loads to be served, such as inductive and capacitive.

Working Principle of STOD13CTPUR

The STOD13CTPUR provides a regulated output voltage regardless of load, line, or ambient temperature variations. Its working principle can be understood when we look in details at how its controller topology works. It uses two independent comparators and an edge detector to sense the input voltage, a breakthrough compound charge pump to reduce the necessary input voltage and provide a higher output voltage, and a reference voltage generator. The output voltage is controlled by the combination of these parts and a specific characteristic of the reference voltage generator which acts as an amplifier holds a constant output voltage. At the same time, an on-time generator is used to control the output current, and thus extends its regulation range. Finally, the output transistor is switched ON and OFF by the pulse-width modulated signal, taking the output voltage to its desired value.

The STOD13CTPUR is a very specialized voltage regulator, providing features that are very useful in industrial applications where constant voltage and current is needed. It has a variety of applications and its working principle makes it suitable for distributed power systems and motor drives, as well as other high current applications.

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