LYT1402D-TL

LED drivers, also known as power management integrated circuit (PMIC) products, are essential components of any Lighting system. They are designed to limit the current supplied to an LED while simultaneously providing the necessary voltage needed to light the diode. The LYT1402D-TL is an example of such a product, and is specifically designed to reduce the flickering and glitches often associated with inexpensive low-power LED lighting systems. In this article, we will explore the application field and working principle of the LYT1402D-TL PMIC - LED driver.

The LYT1402D-TL LED driver is designed for applications such as residential lighting, retail lighting and office lighting, where dimming control is needed. The driver is suitable for LED types such as LEDstrip, LED spot light and LED panel, and can maintain a constant current output up to 25W. The driver also features high true accuracy (up to 3%) and low flicker ratio (<30%) at a 20kHz dimming frequency, as well as a wide range dimming frequency (8-20kHZ). It has a built-in thermal protection circuit, which can protect the device from damaging in the case of over temperature. Additionally, the driver has excellent surge immunity to reduce interference from external sources and ensure reliable operation.

The working principle of the LYT1402D-TL is based on the use of a Pulse Width Modulation (PWM) waveform to vertically chop the LED current waveform, resulting in a smooth and consistent uniform brightness. The PWM waveform is generated by an integrated power control unit that is triggered by a control signal from the dimming source (such as a wall switch or LED dimmer). The waveform is then amplified by an output power stage, where the current is extracted from the input to the LEDs and the voltage is regulated to the optimal voltage for optimal LED brightness. Finally, the generated PWM waveform is filtered by EMI/EMC components and sent to the LEDs for lighting.

In summary, the LYT1402D-TL is a PMIC - LED driver designed for a wide range of applications, including residential, retail and office lighting. It is capable of maintaining a constant current output up to 25W, while offering excellent flicker suppression, surge immunity, and thermal protection. Its working principle relies on the use of a PWM waveform generated by an integrated power control unit, which results in a smooth and uniform LED brightness. This driver has revolutionized the LED lighting industry, making it more safe, reliable, and cost-effective than ever before.