The EV3383-S-00A evaluation board is designed to demonstrate the capabilities of the MP3383, a step-up controller with four LED current channels that is designed to drive WLED arrays for large LCD panel backlighting applications. The MP3383 can expand the number of LED channels with two or more ICs in parallel sharing a single power source.

The MP3383 employs peak current control mode with a fixed switching frequency (f_SW) that can be configured via an external setting resistor. The MP3383 drives an external MOSFET to boost up the output voltage (V_OUT) from a 6V to 33V input voltage (V_IN) supply. It also regulates the current in each LED string to the value set by an external current-setting resistor.

The MP3383 applies four internal current sources for current balancing. The current matching achieves 1.8% regulation accuracy between strings. The low regulation voltage on the LED current sources reduces power loss.

The MP3383 supports direct pulse-width modulation (PWM) dimming as well as analog dimming using a PWM input. Full protection features include over-current protection (OCP), over-temperature protection (OTP), under-voltage protection (UVP), over-voltage protection (OVP), LED short and open protection, and inductor and diode short protection.

The MP3383 is available in SOIC-16 and TSSOP-16EP packages.