MP3326

16 Channels, 50mA/Ch, LED Driver

with Separated PWM Analog

Dimming and I2C Interface

MP3326 Rev. 1.0

www.MonolithicPower.com

1

1/4/2021

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© 2021 MPS. All Rights Reserved.

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 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

MP3326

is

available

in

a

QFN-24

(4mmx4mm) package.

FEATURES

 Wide 4V to 16V Input Voltage Range

 16 Channels, 50mA/Ch Maximum (V

IN ≥

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

All MPS parts are lead-free, halogen-free, and adhere to the RoHS directive.

For MPS green status, please visit the MPS website under Quality

Assurance. “MPS”, the MPS logo, and “Simple, Easy Solutions” are

trademarks of Monolithic Power Systems, Inc. or its subsidiaries.