TPS92074DDCT

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PMIC - LED Drivers are widely used industrial sectors. In particular, the TPS92074DDCT is designed to meet the need for highly efficient and accurate LED drivers. It is a high-efficiency, low power LED driver that is optimized for LED backlighting applications.

Features of TPS92074DDCT LED Driver

TPS92074DDCT is available in 3-pin SOT-23 package and includes a set of features that make it ideal for applications in energy-efficient LED backlighting. It offers a wide voltage range of 2.5V to 18V, low quiescent current of 20 µA, and programmable current accuracy of ±2%. Additionally, the device features programmable PWM frequency with data memory, an operating temperature range from −40°C to 85°C, and low EMI compliance.

Applications

The applications of TPS92074DDCT include LED backlighting for LCDs, general purpose, and high intensity lighting. It is ideal for applications in consumer electronics such as TVs, monitors, and laptops. The versatile device is also used in industrial and automotive lighting applications, including home lighting, automotive headlamps, and smart lighting.

Working Principle

TPS92074DDCT is a single stage, high efficiency DC-DC Buck-Boost converter. It has an internal oscillator frequency of 1.5MHz and employs a four layer ouput inductor to regulate the output current. Maximizing the efficiency of the device is by enabling PWM operation of the converter. Furthermore, the current limit can be programmed with external resistors.

The external MOSFET serves the purpose of the ON/OFF switch in the converter. In steady state condition, the control circuit will regulate the output voltage by modulating the swithcing frequency and peak current using the Pulse-Width Modulation (PWM) technique. The PWM frequency is programmable from 1kHz to 200kHz and can be optimized to reduce system noise and maintain a flicker-free dimming.

The adaptive on-time current control of the TPS92074DDCT ensures that the load current is accurate and regulated. It is achieved by providing a constant ON time in order to maintain a regulated output voltage. The device features programmable soft start and over current protection with hystersis.

Advantages

The TPS92074DDCT is an excellent solution for optimizing efficiency and accuracy of LED drivers. It has been designed to achieve high efficiency (more than 90% efficiency) and accuracy (±2% current accuracy) for LED backlighting applications. Additionally, the device offers programmable PWM frequency, fast transient response, and low EMI compliance.

By integration of the TPS92074DDCT into LED backlighting applications, manufacturers can achieve considerable energy savings. This can be up to 30% compared to similar LED drivers. Furthermore, the fast response time, low quiescent current, and low EMI compliance offer advanced LED dimming capabilities.

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