LM3502SQ-35/NOPB

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

The LM3502SQ-35/NOPB is an integrated PMIC - LED driver device. It is a primary-side controlled buck-boost LED driver optimized for driving multiple high power LEDs at an output current of up to 35mA and an input voltage range of 4.5-42V. The LM3502SQ-35/NOPB contains emulated current sensing and constant-current control, eliminating the need for complex current sensing circuitry and associated external components.

The device integrates a high-side N-Channel MOSFET as a power switch controlled by a primary-side feedback loop. It also includes a shutdown pin input and under-voltage lock-out (UVLO) protection. The LM3502SQ-35/NOPB can be configured for operation in either Buck or Buck-Boost topologies with constant-current control. It also features a programmable soft-start, adjustable frequency, programmable LED current slew rate control and adjustable current foldback.

The LM3502SQ-35/NOPB is suitable for a variety of LED-driving applications, including street lighting, lighting panels, digital signage, architectural lighting, and automotive backlighting. The device has an ultra-wide adjustable input voltage range and supports simple dimming, allowing it to be used in a variety of applications with a single part number.

The features of the LM3502SQ-35/NOPB also make it well suited for applications that require robust lighting control, including those in harsh or extreme environments. The device offers high system efficiency in both Buck and Buck-Boost modes, making it suitable for designs with low power consumption. It also features under-voltage lockout protection and can be triggered from either a logic level shutdown or an analog control signal.

The core of the LM3502SQ-35/NOPB consists of two main blocks: the power-switch and the control logic. The power switch section comprises a high-side N-Channel MOSFET, which acts as a voltage-controlled current source. The control logic block is responsible for regulating the current fed to the load and consists of the shutdown, the under-voltage lockout, the soft-start, the frequency, the current limit, the over-current protection, and the slew rate control.

The device is a constant-current LED driver, so it operates by setting the output voltage to one which will regulate the current flowing through the LEDs. This is achieved by monitoring the current-sense voltage across a current-sense resistor which is connected in series with the LED load. The LM3502SQ-35/NOPB\'s internal comparator then compares the current-sense voltage to a programmable voltage reference, setting the output voltage to the desired level to maintain constant LED current.

The LM3502SQ-35/NOPB provides high system efficiency in both Buck and Buck-Boost operating modes. The device is designed to operate over a wide range of input voltages, and can be used to drive multiple high-power LEDs simultaneously. In addition, the device supports simple dimming, offering designers the flexibility to adjust the LED brightness without the need for complex circuitry.

Overall, the LM3502SQ-35/NOPB is a versatile integrated PMIC - LED driver device, suitable for a range of LED-driving applications. The device is capable of operating efficiently over a wide range of input voltages, and can be configured for Buck or Buck-Boost topologies with constant-current control. In addition, the device features a range of features which offer robust lighting control for applications in extreme or hazardous environments.

The specific data is subject to PDF, and the above content is for reference