AL5802LPL-7

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The AL5802LPL-7 is an LED Driver belonging to the PMIC (Power Management Integrated Circuits) family. It is a so-called "Buck LED Driver", meaning it produces a constant current output when a variable input voltage is applied. This can be useful in regulating the light output of LEDs which are used in a range of end products, from TVs to kitchen appliances.

The AL5802LPL-7 is a low cost and efficient, single-stage LED driver. It is highly integrated and requires only 3 external components to operate. This, and its high efficiency, make it well suited for portable designs, such as in smartphones or wearable devices.

The AL5802LPL-7 operates from as low as 2.5V to as high as 60V in and provides constant current range from 20 mA to 1000 mA for up to 12 channels when operating from a single supply. The operating temperature range is -40°C to +105°C, with an operating frequency of 1 MHz.

The AL5802LPL-7 is a DC/DC converter that implements a Pulse Width Modulation (PWM) control loop to regulate the output current. The input voltage is applied and compared to the feedback voltage at half of the output current, and the PWM signal is modulated accordingly. The output current is then adjusted in fixed increments or decrements by a factor of 2 to maintain the correct output current. This feedback loop is relatively insensitive to changes in load and input voltage. The feedback voltage is also regulated to maintain stability of the output current even as the input voltage changes.

The AL5802LPL-7 provides very low ripple and output voltage noise, reducing power dissipation while assuring accuracy of the output current. It is also highly efficient – up to 96%. This makes it well suited for applications where power savings are important.

In summary, the AL5802LPL-7 is a low cost and efficient, single-stage buck LED Driver that is suited for use in portable designs where power savings are important. It is highly integrated and operates over a wide input voltage and output current range, with very low ripple and output voltage noise.

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