EV3398H-S-00A

The EV3398H-S-00A is an evaluation board designed to demonstrate the capabilities of the MP3398H, a step-up controller with four LED current channels, designed to drive white LED (WLED) arrays for large-sized LCD panel backlighting applications.

The MP3398H can expand the number of LED current channels with two or more ICs in parallel sharing a single power source.

The MP3398H employs peak current control mode with a fixed switching frequency (f_SW) that is configurable via an external setting resistor. The MP3398H drives an external MOSFET to boost the output voltage (V_OUT) from a 4.5V to 33V input voltage (V_IN) supply. The device also regulates the current in each LED string to the value set by an external current-setting resistor.

The MP3398H applies four internal current sources for current balancing. It achieves 1.5% current matching regulation accuracy between the strings. The low regulation voltage on the LED current sources reduces power loss.

The MP3398H supports direct pulse-width modulation (PWM) dimming mode with a PWM input and analog dimming mode with a PWM input or DC 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 MP3398H is available in an SOIC-16 package. The EV3398H-S-00A is a fully assembled evaluation board.