MIC2287CBD5

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The MIC2287CBD5 field effect transistor (FET) driver has gained widespread popularity for its simple and efficient operation. This application note discusses the applications and working principle of the MIC2287CBD5.

The MIC2287CBD5 is a high-speed, full-bridge LED driver. It has an operating temperature range from -40 to +125 Celsius, with an integrated thermal shutdown and thermal warning function. The MIC2287CBD5 has a low quiescent current and can operate in overcurrent, overtemperature and reverse-voltage conditions.

The MIC2287CBD5 is ideal for high efficiency, low-power LED lighting applications. It can drive up to 8 LEDs per bridge in a simple series connection when operated at maximum supply voltages of 18V. In more complex configurations, it is possible to combine up to 4 full-bridge drivers in a series to drive up to 32 LEDs. The MIC2287CBD5 has an adjustable switching frequency that ranges from 50kHz to 1MHz, providing users with greater flexibility when designing lighting applications.

The working principle of the MIC2287CBD5 is based on pulse width modulation (PWM) control. A digital PWM signal is applied to the bridge driver inputs, which vary the drive current to the LEDs. By controlling the average current, the cumulative energy output of the LEDs can be precisely regulated. The MIC2287CBD5 also has an internal high-voltage start-up circuit that ensures safe operation of the LEDs.

The MIC2287CBD5 uses a charge pump voltage regulator in order to boost the available power supply voltage to the desired level. This allows it to deliver a consistent level of current to the LEDs. In addition, the MIC2287CBD5 utilizes a DRMOS MOSFET technology to provide higher control current and higher output power compared to conventional drivers.

The MIC2287CBD5 is an ideal choice for LED driver applications that require high efficiency and low power. It has an adjustable switching frequency, a wide temperature range, and can be used to drive up to 32 LEDs per system. With its simple working principle, the MIC2287CBD5 can easily be integrated into almost any LED lighting design.

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