VI-2NY-IX-F4

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DC DC Converters are voltage-controlled and current-limited power regulators that can convert any DC voltage into a stable and adjustable output. The VI-2NY-IX-F4 is a typical DC DC converter, and its application field and working principle are analyzed in this article.

Feature and Application Field

This device provides 0-2V DC output and uses a MOSFET as its main switch. It has a maximum current rating of 200mA and a maximum power rating of 250mW. Its input voltage source can range from 2.5V up to 20V. This device can be used in a variety of applications, such as power management for embedded circuits, battery-powered applications, and step-down voltage regulation.

The VI-2NY-IX-F4 also has a built-in current sensing circuit which ensures the load current is always within safe operation range even with greatly varying input voltage. It also has an over voltage protection function, which prevents the input voltage to exceed the rated input range and possibly damage the circuit. The device also offers short-circuit protection, which protect the load and attached components from being damaged when the output is short-circuited. Additionally, the device also has an internal temperature sensing circuit to protect the device from high temperature.

Output Characteristics

The output voltage can be adjusted between 0V and 2V. The output voltage is determined by a voltage divider RC network and can be programmed within the above voltage range by a programming voltage. The Output voltage is further regulated by the current sense control loop, which provides higher output voltage stability and operation. It also ensures that the output current always stays within the safe range

Working Principle

The VI-2NY-IX-F4 utilizes the hysteretic control method, in which the output voltage is regulated through a feedback loop. The working principle of the VI-2NY-IX-F4 is based on the "duty cycle control", in which the switch transistor is under PWM (pulse wave modulation) control and the output voltage is regulated through pulse width modulation.

The working principle of the VI-2NY-IX-F4 is composed of three stages, which are the PWM comparator, the current sensing for over- load protection, and the built-in over voltage protection circuit. The PWM comparator is the main part of the control circuit, which compare the reference voltage set by the voltage divider RC network with the output voltage feedback voltage. The comparison result determine the duty cycle of the PWM signal, which is applied to the gates of the switch transistor. The internal current sensing circuit senses the load current changes and adjusts the output voltage accordingly to keep the device within the safe working range.

Additionally, the built-in over voltage protection circuit will shut down the switch transistor and prevent the input voltage from being higher than the rated input range, which may damage the circuit.

Conclusion

The VI-2NY-IX-F4 is a DC DC converter with 0-2V output voltage, 200mA maximum current rating, and 250mW maximum power rating. Its application field includes power management of embedded circuits, battery-powered applications, and step-down voltage regulation. It uses the hysteretic control method and its working principle is base on the duty cycle control. It is protected from over current, overvoltage, and high temperature through its built-in protection features.

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