TNY286DG

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The TNY286DG is a low quiescent current AC/DC step-down switching regulator, which includes an efficient internal switch mode power supply. This affordable and reliable power management integrated circuit (PMIC) is designed for applications such as computer, consumer, and industrial equipment, including motor control, LED lighting, robotics, and metering. It is also suitable for powering low power microcontrollers and sensors.

This power system is designed to deliver high efficiency and higher load current than traditional linear converters, while providing better thermal and electrical performance. It counts with a wide input voltage range of up to 540V, and is capable of delivering a peak output current of up to 3A while maintaining a high efficiency of up to 90%. The TNY286DG integrates a synchronous rectifier topology that eliminates the need for an external Schottky diode, reducing the size and complexity of the overall circuit.

The TNY286DG includes a number of features such as undervoltage lockout for both the main input and standby input, thermal shutdown with hysteresis, and an adjustable asynchronous soft-start that ramp the device’s output voltage from 0V up to the nominal value. It also offers an adjustable frequency from 740 kHz down to 510 kHz, allowing users to tailor their design to the desired efficiency profile.

The working principle of the TNY286DG is based on a pulse width modulation (PWM) controller that drives an integrated power switch (MOSFET) to generate an output voltage. It works similarly to a traditional buck switch-mode power supply; it is controlled by a feedback loop that regulates the output voltage. The duty cycle of the output voltage is adjusted by the PWM controller, based on the error signal of the regulated output.

The TNY286DG features an asynchronous rectifier topology, which allows the output voltage to be converted from its DC source without needing an external rectifier. This reduces the component count, size, and cost of the power conversion system. The integrated synchronous rectifier’s switch will follow the PWM cycle and turns on/off based on the ramp signals generated by the controller, creating an efficient power conversion circuit.

The TNY286DG offers a wide range of protection features; it protects against thermal, over voltage, and short-circuit conditions. It also provides a programmable over temperature protection feature, and a soft-start feature to reduce the inrush current during power up. Additionally, the device can be protected by external components such as an N-Channel MOSFET, and a current sense resistor.

The TNY286DG is a reliable and cost-effective solution for powering low power microcontrollers and sensors, as well as for providing consistent and efficient power to other application areas such as motor control, LED lighting, robotics, and metering. It is an ideal choice for circuitry that requires a low quiescent current, high efficiency, and wide input voltage range, such as that found in computer, consumer, and industrial equipment.

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