TPS61301YFFT

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LED lighting has become increasingly common in a variety of applications, from residential and commercial lighting to automotive and industrial lighting.

The TPS61301YFFT LED driver is an ideal solution for a wide range of LED lighting applications. This LED driver is a highly integrated, mono-channel LED driver featuring high efficiency, low standby power, and programmable LED current. In addition, the device is provided with several protection features such as output over-voltage protection, output short-circuit protection, and thermal shutdown protection.

Application Field

The TPS61301YFFT is an ideal power solution for dimmable LED lighting applications including indoor lighting, outdoor lighting, stage lighting, and decorative lighting. This driver is specially designed for AC/DC power supplies and displays excellent performance in transformer-less applications. Additionally, the wide supply voltage ranges from 20 V to 35 VDC and adjustable output current allows for easy design flexibility in a wide range of applications.

Working Principle

The TPS61301YFFT is a programmable LED driver with regulated current output. The internal topology consists of an oscillator, a boost power MOSFET, an error amplifier, a voltage-mode control loop, and a current-sense amplifier. The main components of the LED driver are the oscillator, the boost MOSFET, the LED current sense resistor, and the LED cathode voltage feedback loop.

The oscillator frequency is programmed via the external resistor connected to OSCIN pin. Not only does this allow for easy design flexibility in a wide range of applications but also allows for efficient operation with minimal standby power consumption. The boost MOSFET is responsible for delivering the main part of the power to the load (LEDs). The current-sense amplifier is designed to sense the voltage across the current sense resistor and provides feedback to the voltage-mode control loop to maintain a stable output current.

Finally, the LED cathode voltage feedback loop serves as a safeguard to protect the device in the event of an output overvoltage or short-circuit. In these cases, the voltage sense circuit detects the voltage at the terminal end of the LED string and controls the boost MOSFET to reduce the output current and protect the device.

Therefore, the TPS61301YFFT provides an integrated, high efficiency, low standby power, and programmable LED current. It is perfectly suited for a variety of LED lighting applications, ranging from indoor and outdoor lighting to automotive and industrial lighting.

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