MIC2870YFT-TR

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The MIC2870YFT-TR is a current-mode step-up LED driver. It is a member of the Power Management and Integrated Circuits (PMIC) family and is classified under LED Drivers. The device is designed to boost key parameters of an LED such as current, voltage, and pulse width modulation.

The MIC2870YFT-TR device is provided in a six-pin surface mount package and is well suited for applications such as indoor lighting fixtures, portable gaming devices, mobile phones, and tablet computers. With high current accuracy and ultra-low shutdown current, the device is an ideal choice for high efficiency operation. Additionally, the device features a low-noise operation, wide operation temperature range, and internal compensation.

The MIC2870YFT-TR working principle is based on current-mode control and Pulse Width Modulation (PWM) dimming. It integrates a single switch current-mode boost converter and a 400V integrated MOSFET. It also has a low-noise control oscillator, an internal compensator, an internal voltage reference, and over voltage protection circuitry.

The oscillator frequency of the device is typically set at 500KHz, but can be adjusted by an external resistor to achieve higher frequency. Furthermore, it has an integrated Low-Battery Detection interface that allows it to detect the input voltage and adjust the output current accordingly. Additionally, the integrated current sense amplifier allows for precise current sense and over current protection.

The MIC2870YFT-TR is equipped with a dedicated dimming control interface that is compatible with PWM dimming signals from microcontrollers, enabling precise control over LED brightness. The device has an enable pin that can be used to turn off the output even when the dimming signal remains high. Additionally, it provides a run and enable status flag to indicate the state of the output.

Overall, the MIC2870YFT-TR is a highly integrated, current-mode step-up LED driver designed to boost key LED parameters while delivering high efficiency, low-noise operation, and wide operational temperature range. With its precise dimming control and integrated current sense amplifier and low-battery detection interface, it is an ideal choice for many portable devices, including indoor lighting fixtures, mobile phones and tablets.

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