MIC2282YMM

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The MIC2282YMM is a triple output, fixed-frequency non-synchronous, buck switching regulator PMIC - LED driver device. This buck regulator can deliver up to 450mA in 3.3V output, while simultaneously offering a 1.8V output of up to 600mA and an adjustable voltage output of between 2.5 and 5.5V with up to 200mA current. These outputs are provided with dual-stage switching and accurate LED current controls via an integrated constant-current LED driver and a linear LED driver.

The MIC2282YMM is equipped with two integrated gate drivers for driving external FETs which provide the desired voltage output. The gate drivers can drive up to both low-side and high-side FETs. In order to achieve high power conversion efficiency, the MIC2282YMM also contains an onboard low-loss switch formed by two parallel MOSFETs that are shorted together. This feature greatly reduces the power losses and helps to increase the efficiency.

The MIC2282YMM is particularly useful for powering high-power LEDs due to its unique protection features, integrated current sensing and adjustable output voltage. The device includes several built-in safety features, such as UVLO (Under-Voltage Lock Out), OVP (Over Voltage Precharge), OCP (Over-Current Protection), and ZCD (Zero-Current Detection). All of these features make the MIC2282YMM suitable for applications in health care, automotive lighting, portable lighting, and other applications that require safety-critical systems.

The MIC2282YMM’s working principle is based on DC to DC conversion using the buck topology. This buck topology is based on a MOSFET switching circuit, which uses power from a high-voltage (HV) rail to charge an inductor. As the MOSFETs are turned off, the current in the inductor flows through the ground and the output diode, thus delivering the desired output voltage. The operating frequency is internally fixed at a frequency of up to 750 kHz, which enables a high efficiency and compact size.

The MIC2282YMM’s LED driver module provides an ultra-fast response to LED current signals, which is necessary for dimming/blinking applications. The LED driver also allows for a wide range of input voltage (2.2 to 5.5V) and constant current control with adjustable current setting. This enables the MIC2282YMM to meet the requirements of different LED applications, such as automotive lighting and portable lighting.

The MIC2282YMM also integrates a high-side current sensing circuit, which provides a regulated current control in the range of 0.95A to 3A. The regulated current supplied to the LEDs can be regulated and accurately monitored through the current sense pin. This feature can help to prolong the life of the LEDs and ensure a long-lasting and efficient light output.

In conclusion, the MIC2282YMM is a feature-rich, non-synchronous, buck switching regulator PMIC - LED driver device that is suitable for use in various applications. It is equipped with features such as dual-stage switching and current sensing circuit, as well as safety features such as UVLO, OVP, and OCP. These features allow it to deliver high power output with low power consumption while providing reliable and safe operation.

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