MAX20078ATE/V+T

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MAX20078ATE/V+T is a PMIC - LED Drivers designed to provide a single-stage current limit, constant voltage and constant thermal effect, enabling the smooth operation of automotive and off-road LED lighting solutions. It provides the designer with the ability to design a high-efficiency, low-cost, reliable and efficient LED lighting system.

The MAX20078ATE/V+T is a step-down, low-dropout, high-side gate driver IC with a built-in thermal shutdown function. It provides a wide range of output current from 0.25A up to 4.0A, with a programmable PWM duty cycle control. The output voltage is adjustable from 1.4V to 4.2V, with the maximum operating frequency adjustable from 10MHz to 210MHz. The device also includes an active current limit circuit, with an adjustable over-current detection limit that can be set to as low as 100mA.

The main benefit of the MAX20078ATE/V+T LED driver is that it eliminates the need for an external current limit device, hence reducing the component count and cost. Additionally, the device has a built-in fault protection circuit which can detect and react to any short or over-current situation, providing enhanced system reliability.

The MAX20078ATE/V+T is designed to be used in automotive and off-road LED lighting applications. It can be used to drive automotive and off-road lamps, such as fog lights, daytime running lights, headlamps, and tail lights. Additionally, the device can be used to drive high power LED cluster or matrix lighting solutions.

The working principle of the MAX20078ATE/V+T is based on a dual-stage current limiting technique. The first stage detects for a current that is higher than the preset limit and limits the output current accordingly. The second stage control the voltage of the output with a fixed loop such that the output voltage is maintained constant at the input voltage. The combination of these two stages enable the LED to be driven without any excessive current that can cause LED damage.

In addition to the current and voltage limit, the device also includes a built-in thermal shutdown protection feature. This allows for proper thermal protection of the LEDs, ensuring longer LED lifetime and better system reliability. The device also features a wide operating temperature range of -40°C to +125°C, making it an ideal solution for automotive and off-road LED lighting applications.

In conclusion, the MAX20078ATE/V+T is a high-efficiency, low-cost LED driver designed specifically for automotive and off-road LED lighting applications. It provides current and voltage limit protection, along with a built-in thermal shutdown function, allowing the LED to be safely and reliably driven while ensuring a long LED lifetime.

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