LM3497MM/NOPB Integrated Circuits (ICs)

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LED Drivers are an integrated circuit designed to power light emitting diodes. This type of integrated circuit is typically used in lighting and automotive applications. One such device is the LM3497MM/NOPB which is an ultra-low voltage, high-brightness LED Driver. It is designed to provide an integrated solution for automotive, general lighting, and appliance lighting applications.

The LM3497MM/NOPB is a highly integrated n-channel flyback LED Driver designed to drive up to 3 LEDs from a single cell Li-Ion or two-cell alkaline battery. The device features two independent large capacitance current sources that are capable of achieving high LED current accuracy. The device also includes a precision-controlled start-up voltage, a low brightness flicker, and an adjustable LED current limit. The LM3497MM/NOPB is an ideal solution for low-cost, high-brightness LED lighting applications.

The LM3497MM/NOPB is a current mode flyback LED Driver. This topology uses the primary side power switch and the transformer to regulate the output current. The device senses the LED current using a dedicated current sensing transistor that is in series with the LED. The primary switch is then turned on and off using the switch control logic. By varying the on/off ratio, the LED current can be regulated to maintain a constant output voltage.

The LM3497MM/NOPB also offers a wide range of operating parameters, including a low output voltage setting of 2.5V, a high output voltage setting of 25V, and a flicker-free start-up voltage of 1.0V. The device enables the user to fine-tune the LED current set-point to optimize the efficiency of the system. Furthermore, the device is capable of providing up to 1.5A peak current per channel, allowing for higher brightness outputs.

The LM3497MM/NOPB also includes a dedicated open/short protection circuit that prevents the flyback transformer from saturating, thereby reducing power draw and improving the system efficiency. Additionally, the device features built-in overtemperature protection and undervoltage lockout protection to ensure reliable operation in extreme operating conditions. Furthermore, the device is able to operate in pulse-width modulation (PWM) and analog dimming modes, providing improved brightness control.

The LM3497MM/NOPB is an ideal choice for applications requiring low voltage, high-brightness LED lighting. The device offers a highly integrated solution that supports a wide range of operating parameters, ensuring reliable and efficient operation in all applications. Furthermore, the device is able to operate in both PWM and analog dimming modes, enabling the user to tailor the lighting system to their specific needs.

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