LM3500TL-16/NOPB

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Introduction

The LM3500TL-16/NOPB is a Buck Step-Down Switching Regulator featuring excellent control and performance with high power efficiency. It is a type of PMIC (Power Management Integrated Circuit) specifically for LED drivers, specifically a power LCD driver. It provides adjustable output Current and provides integrated protection features. The LM3500TL-16/NOPB is a buck step-down regulator configured to act as an open-drain or closed-loop driver. In both cases, it can be used in either polarity (positive or negative output currents). It is commonly used in applications such as lamp current limiting, buck-boost current controlling, and high/low voltage protection.

Applications

The LM3500TL-16/NOPB is designed specifically with LED drivers in mind, including TV and monitor back lighting, automotive interior lighting, and architectural lighting such as street lamps. It can support high and low voltage protection, current limiting and dimming control. It is typically integrated with either a PWM (pulse width modulation) or an analog control. The LM3500TL-16/NOPB can be used in automotive applications, particularly for headlights and indicators, as it has a built-in thermal protection feature. It can also be used in outdoor and industrial lighting, such as street lights and parking lot lighting.

Features

The LM3500TL-16/NOPB is an adjustable current regulator with high efficiency. It is able to step-down the voltage up to 16 V and provide current up to 5 A. Thanks to its thermal protection, it can be used safely in harsh environments and high temperature areas. Its features include a wide input voltage range of 4 to 35 V, a wide output voltage range of 0.8 V to 16 V, and process independent current limit. It also provides over-temperature and overvoltage protection. Moreover, it has a very low operating current (typically 1 mA) and built-in reverse current blocking diode for low EMI applications.

Working Principle

The principle behind the LM3500TL-16/NOPB is that when the input voltage is applied, it is switched by an internal switch between the 2 terminals, resulting in a current through the output load. The output voltage is controlled by the on- resistance of the switch. By controlling the gate of the internal switch, a fixed output voltage can be maintained, while the maximum current is controlled by the load. The LM3500TL-16/NOPB contains a circuit which senses the current of the external series load and controls the switching of the internal switch accordingly in order to maintain the desired output voltage.

Conclusion

The LM3500TL-16/NOPB is a buck step-down LED driver featuring an adjustable current regulator and high power efficiency. It is regularly used for applications such as TV and monitor backlighting, automotive interior lighting, and architectural lighting. Its features include a wide input voltage range of 4 to 35 V, a wide output voltage range of 0.8 V to 16 V, and process independent current limit. It also provides a thermal protection, over-temperature, overvoltage protection, and a reverse current blocking diode for low EMI applications. The working principle behind the LM3500TL-16/NOPB is that when the input voltage is applied, it is switched by an internal switch between 2 terminals, resulting in a current through the output load, the output voltage being controlled by the on- resistance of the switch.

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