LM3405AXMYX/NOPB

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LM3405AXMYX/NOPB is a PMIC (Power Management Integrated Circuit) LED driver suitable for applications such as driving high-power LED backlighting, LED signage, and LED illumination. With the maximum output current of 10A, the device can efficiently drive up to 8 LEDs in series with a regulated LED current. Featuring a Flexible LED dimming and bipolar synchronization with the external PWM signal, this device is highly reliable and has remarkable performance.

The working principle of the LM3405AXMYX/NOPB is simple. The circuit consists of three main parts: the voltage regulator, the current regulator, and the control logic. The voltage regulator works as a voltage control oscillator and maintains a constant voltage level in the circuit. The current regulator controls the operating current of the LEDs by sensing the voltage across the LEDs and regulating the current output. The control logic then enables or disables the current regulators based on the required dim level. With the help of the power FETs (field-effect transistors), the device can then switch the load current on or off.

The LM3405AXMYX/NOPB is suitable for driving arrays of LEDs in parallel or in a mixture of parallel and series configurations. With the help of internal compensation, the device is able to regulate the LED current with minimal changes in the voltage drop across the diode. The device also supports Soft-Start and open-loop LED current protection, thus providing protection against over-current and short circuit conditions. In addition, the device supports LED dimming with external PWM signals and can be driven with a wide range of input voltages.

The device also incorporates low-side current sensing to measure the current through the LEDs and provide feedback for the current control loop. This allows the device to adjust the LED current precisely and efficiently. The device also has an integrated thermal shutdown and over-voltage protection to ensure safety. In addition, it has a built-in thermally activated cooling feature that helps maintain a stable temperature level and thus, improve the reliability of the circuit.

By combining a variety of features, the LM3405AXMYX/NOPB is able to provide a unique and efficient solution for LED applications. With its wide range of features, it is a reliable and cost-effective solution for driving high-power LEDs. With its high output current and low input voltage, it is ideal for a variety of applications. Furthermore, the device can easily be integrated into various designs due to its flexibility and reliability.

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