MPQ3323B Datasheet | Monolithic Power Systems

DESCRIPTION The MPQ3323B is a 4-channel LED driver that can operate from a wide 4.5V to 16V input voltage (VIN) range. The MPQ3323B applies four internal current sources in each LED string terminal. The LED current (ILED) of each channel is set by an external current-setting resistor. The maximum current for each channel is 320m A. The MPQ3323B integrates an I2C interface with up to 10 configurable I2C addresses via an external resistor. This means the MPQ3323B can support up to 10 ICs cascaded ICs to drive the LED array. Each channel can be enabled or disabled via the I2C. The MPQ3323B employs both separated pulsewidth modulation (PWM) dimming and analog dimming for each LED channel, as well as 12-bit PWM dimming and 6-bit analog dimming for each channel. The ILED ramping rate and phase shift can be configured to reduce EMI. The MPQ3323B can output a refresh signal from the RFSH/FLT pin. The refresh signal frequency (f REFRESH) can be set via the I2C. Full protections features include LED open protection, LED short protection, and overtemperature protection (OTP). The device also features a fault indicator. If a protection is triggered, then the RFSH/FLT pin is pulled low, and the corresponding fault register is set. The MPQ3323B is AEC-Q100 qualified, and is available in a QFN-24 (4mmx4mm) package. FEATURES - Wide 4.5V to 16V Input Voltage (VIN) Range - 4 Channels, Max 320m A/Ch - LED Current (ILED) Configured via External Resistor - 6-Bit Analog Dimming for Each Channel - 12-Bit Pulse-Width Modulation (PWM) Dimming for Each Channel - Selectable 220Hz, 250Hz, 280Hz, or 330Hz PWM Dimming Frequency (f PWM) - Refresh Signal Output - I2C Interface - 10 Addresses Configurable via External Resistor - Configurable ILED Slew Rate - Fault Indicator - LED Open Protection - LED Short Protection with Configurable Threshold - Under-Voltage Lockout (UVLO) Protection - Over-Temperature Protection (OTP) - Available in a QFN-24 (4mmx4mm) Package - Available in a Wettable Flank...