LM3502SQX-35/NOPB

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The LM3502SQX-35/NOPB is a high performance, low quiescent current, and low noise, high efficiency boost led driver adopted topology design and with I2C dimming interfaces. It can be used to drive a single string of LEDs with a maximum of 35V at the best efficiency. All set up can be changed by using I2C interfaces in order to customize the output voltage and current. It includes functionalities such as over-voltage protection and auto-restart when over-voltage is over the limit, built-in soft-start function, current limit protection, LED open, LED short protection and over-temperature protection as well to keep the system safety.

The LM3502SQX-35/NOPB is a great complement for long battery-life applications including ambient light sensing (ALS), proximity sensing (PS) and Time of Flight (ToF). It is an ideal backlight driver for consumer electronics like LCD and LED displays, ultra-high bright LED backlights on cell phones, PDAs and notebook PCs as well. The driver also works with multi-strings LED displays, including LED TV and display systems.

The working principle of the LM3502SQX-35/NOPB is based on an isolated charge pump topology circuit. It has two integrated power switches, a power MOSFET and a low RDS(ON) PMOS switch. The charge pump voltage is set by resistor dividers and the boosted voltage is regulated by the feedback loop. The LM3502SQX-35/NOPB is able to deliver up to 350mA of regulated conversion current when the voltage output is driven up to 35V.

The LM3502SQX-35/NOPB also has a high precision analog dimming interface that enables precise control of output currents up to ±1.5%. It also has high-efficiency, low RDS(ON) gate drive current limit control, soft start and low quiescent current to extend battery life. The driver also features a typical power efficiency of about 95%.

In conclusion, the LM3502SQX-35/NOPB is a high performance, low quiescent current, low noise and high efficiency boost LED driver with I2C dimming interfaces. It is ideal for applications such as ambient light sensing, proximity sensing and Time of Flight. It is a great complement for long battery-life applications and works well with LCD and LED displays, ultra-high bright LED backlights, LED TV and display systems. The working principle is based on an isolated charge pump topology circuit with two integrated power switches, a power MOSFET and a low RDS(ON) PMOS switch. It has high precision analog dimming interface, high-efficiency, low RDS(ON) gate drive, current limit control, soft start and low quiescent current, and delivers up to 350mA of regulated current with a typical power efficiency of 95%.

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