DESCRIPTION
The MP3326 is a 16-channel WLED driver that
can operate from a wide 4V to 16V input voltage
range. The MP3326 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 up to 50mA (VIN ≥ 4.5V).
The device integrates an I2C interface with up to
10 configurable I2C addresses via an external
resistor. This means the MP3326 can support up
to 10 cascaded ICs to drive the LED array. Each
channel can be enabled or disabled through the
I2C.
The MP3326 employs both separated 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 device can output a refresh signal from the
RFSH/FLT pin, and the refresh signal frequency
can be set by the register.
Open-load protection, short protection, and overtemperature
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 MP3326 is available in a QFN-24
(4mmx4mm) package.

FEATURES
 Wide 4V to 16V Input Voltage Range
 16 Channels, 50mA/Ch Maximum (VIN ≥
4.5V)
 LED Current Configured by External
Resistor
 6-Bit Analog Dimming for Each Channel
 12-Bit PWM Dimming for Each Channel
 Selectable 220Hz, 250Hz, 280Hz, or 330Hz
PWM Dimming Frequency
 Refresh Signal Output
 I2C Interface
 10 Addresses Configurable via External
Resistor
 Configurable LED Current Slew Rate
 40μs Phase Shift
 Fault Indicator
 LED Open-Load Protection
 LED Short Protection with Configurable
Threshold
 Under-Voltage Lockout (UVLO)
 Over-Temperature Protection (OTP)
 ELV Directive II Compliance
 Available in a QFN-24 (4mmx4mm)
Package

APPLICATIONS
RGB Drivers
LED Indicators
Instrument Clusters
General Displays
LED Backlighting