The MPQ3326-AEC1 is a 16-channel WLED driver that operates across a wide 4V to 16V input voltage range. The MPQ3326 applies 16 internal current sources in each LED string terminal. The LED current of each channel is set by an external current-setting resistor. The maximum current of each channel is 50mA (V_IN ≥ 4.5V).

The device integrates an I²C interface with up to 10 configurable I²C addresses via an external resistor. This means the MPQ3326 can support up to 10 cascaded ICs to drive the LED array. Each channel can be enabled or disabled through the I²C.

The part employs separate PWM dimming and analog dimming for each LED channel, as well as 12-bit resolution PWM dimming and 6-bit analog dimming for each channel. To optimize EMI/EMC performance, the LED current ramp rate and phase shift can be configured.

The MPQ3326 can output a refresh signal from the RFSH/FLT pin, and the refresh signal frequency can be set by the register. LED open and short protection, and over-temperature protection (OTP) are integrated into the device. The fault indicator pulls low if a protection is triggered, and then the corresponding fault register is set.

The MPQ3326 is AEC-Q100 qualified, and is available in QFN-24 (4mmx4mm) package.

Advantages include:

• Separate Pulse-Width Modulation (PWM) Dimming and Analog Dimming per Channel
• Deep Dimming Mode, 12-Bit for PWM Dimming
• Phase Shift and Slew Rate to Reduce EMI
• Up to 10 Configurable Addresses