EVQ3367A-R-00A

EVQ3367A-R-00A 6-Channel, Maximum 150mA/Ch Boost WLED Driver with 15000:1 Dimming Ratio and I2C Evaluation Board, AEC-Q100 Qualified DESCRIPTION FEATURES The EVQ3367A-R-00A is an evaluation board designed to demonstrate the capabilities of the MPQ3367A, a step-up converter with six channel current sources. It is designed to drive white LED arrays as backlighting for small- and mediumsized LCD panels.   The device uses peak current mode as its pulsewidth modulation (PWM) control architecture to regulate the boost converter. Six channel current sources are applied to the LED cathode to adjust the LED brightness. The MPQ3367A regulates the current in each LED string to the value set by an external current-setting resistor, with 2.5% current regulation accuracy between strings.   A low on resistance MOSFET and low headroom voltage improve efficiency. For ease of use, the MPQ3367A features a standard I2C digital interface. The switching frequency (fSW) can be configured via a resistor, the I2C interface, or an external clock. The MPQ3367A features analog, PWM, and mixed dimming modes with a PWM input. The dimming mode can be selected with the I2C interface or the MIX/AD pin. The device also has a phase shift function to eliminate noise during PWM dimming. Protection features include over-current protection (OCP), over-voltage protection (OVP), over-temperature protection (OTP), and LED short and open protection. The LED current also decreases automatically at high temperatures. The MPQ3367A is available in a QFN-24 (4mmx4mm) package. ELECTRICAL SPECIFICATIONS Parameter Symbol Input voltage VIN Output voltage VLED LEDs LED current/string ILED Value 12