The EV3317-C-00A evaluation board is designed to demonstrate the capabilities of the MP3317. The MP3317 is a boost converter that features six-channel current sources to drive WLED arrays for LCD panels in virtual reality (VR) backlighting applications.

The MP3317 uses peak current mode and pulse-width modulation (PWM) control to maintain boost converter regulation. The integrated 6-channel LED current (I_LEDx, where x = 1–6) source supports a maximum of 160mA per channel with 2.5% I_LEDx accuracy and 1.5% matching accuracy. The device supports direct PWM dimming for left and right LCD panels via two PWM dimming signals: the PWML and PWMR input pins. 

The MP3317 achieves high efficiency with its low headroom voltage for LED regulation and a low on-resistance (R_DS(ON)) switching MOSFET.

The MP3317 features a standard I²C digital interface to set the operation mode, switching frequency (f_SW), channel enable, and ILED amplitude. The MP3317 features rich protections, including LED open protection, LED short protection, short LEDx-to-GND protection, cycle-by-cycle current limit, input over-current protection (OCP_IN), latch-off over-current protection (OCLATCH), ISET short protection, ISET open protection, over-voltage protection (OVP), and over-temperature protection (OTP).

The MP3317 is available in a WLCSP-20 (1.75mmx2.45mm) package.