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Monolithic Power Systems (MPS) MPQ3369-AEC1 6-Channel Boost WLED Driver is a step-up converter with six-channel current sources, designed to drive white LED arrays as backlighting in small-to-mid-size LCD panels. The MPQ3369-AEC1 uses peak current mode as its PWM control architecture to regulate the boost converter. Six-channel current sources are applied to the LED cathode to adjust the LED brightness. It regulates the current in each LED string to the value set via an external current-setting resistor, with 2.5% current regulation accuracy between strings.
The MPQ3369-AEC1 employs a low on-resistor MOSFET and a low headroom voltage, designed for higher efficiency. It has a standard I2C digital interface for ease of use. The switching frequency can be programmed by a resistor, I2C interface, or external clock. The device provides analog, PWM, and mix dimming mode with a PWM input. The dimming mode can be selected with the I2C interface or the MIX/AD pin. It also has a phase shift function to eliminate noise during PWM dimming.
The MPQ3369-AEC1 incorporates robust protections are to guarantee the safe operation of the device. Protection modes include over-current protection (OCP), overvoltage protection (OVP), over-temperature protection (OTP), LED short, and open protection. There is also an option that
decreases the LED current automatically at higher temperatures.
The Monolithic Power Systems (MPS) MPQ3369-AEC1 6-Channel Boost WLED Driver is available in QFN-24 and TSSOP28-EP packages. The MPQ3369-AEC1 is AEC-Q100 qualified for use in automotive applications.
