EVQ3364-R-00A

EVQ3364-R-00A 36V, 150mA, 4-Channel, Boost WLED Driver with 15000:1 Dimming Ratio and I2C Evaluation Board, AEC-Q100 Qualified END OF LIFE, REFER TO EVQ3364-R-01A DESCRIPTION FEATURES The EVQ3364-R-00A is an evaluation board designed to demonstrate the capabilities of the MPQ3364, a four-channel step-up converter designed to drive white LED (WLED) arrays as backlighting for small or mid-sized liquid-crystal display (LCD) panels. • • • • Peak-current control is used as the pulse-width modulation (PWM) control architecture for regulating the boost converter. Four channelcurrent sources are applied to the LED cathode to adjust the LED brightness. This 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. The maximum current per channel is 150mA. The MPQ3364’s low on resistance MOSFET and low headroom voltage design improves efficiency. The device also has a standard digital I2C interface for easy flexibility. The switching frequency (fSW) can be configured via a resistor, I2C interface, or external clock. The MPQ3364 features three dimming modes: analog dimming, PWM dimming, and mixed dimming via the PWM input. The dimming mode can be selected via the I2C interface or MIX/AD pin. The IC also has a phase shift function that eliminates noise during PWM dimming. Protection features include over-current protection (OCP), over-voltage protection (OVP), over-temperature protection (OTP), LED short protection, and LED open protection. The LED current automatically decreases at high temperatures. The MPQ3364 is available in a QFN-24 (4mmx4mm) package. ELECTRICAL SPECIFICATIONS Parameter Input voltage Output voltage LEDs LED current (per string) Symbol VIN VLED ILED Value 12