The EVQ3359-LE-00A is an evaluation board designed to demonstrate the capabilities of the MPQ3359-AEC1, a 4-channel step-up converter that drives white LED (WLED) arrays as backlighting for small- or medium-sized LCD panels.

Peak current mode is used as the pulse-width modulation (PWM) control architecture to regulate the boost converter. Four channel current sources are applied to the LED cathode to adjust LED brightness. This regulates the current in each LED string to the value set by an external current-setting resistor, with a 2.5% current regulation accuracy between strings.

The MPQ3359-AEC1’s low on resistance (R_DS(ON)) MOSFET and headroom voltage improve efficiency. The switching frequency (f_SW) can be configured via a resistor or an external clock.

The MPQ3359-AEC1 provides analog and PWM dimming via the EN/ADIM and PDIM pins. The device also has a fixed delay time between LED current channels to eliminate 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 EVQ3359-LE-00A is a fully assembled evaluation board. The MPQ3359-AEC1 is available in a QFN-20 (3mmx4mm) package, and it is AEC-Q100 Grade 1 qualified.