MP3326A
16-Channel, 80mA/Channel, LED Driver
with Separate PWM/Analog Dimming
and Digital Interface
DSESCRIPTION
FEATURES
The MP3326A is a 16-channel LED driver that
can operate from a wide 4.5V to 16V input
voltage (VIN) range. The MP3326A applies 16
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 80mA.
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Wide 4.5V to 16V Input Voltage (VIN) Range
16 Channels, Max 80mA/Channel
LED Current (ILED) Configured via an
External Resistor
6-Bit Analog Dimming for Each Channel
12-Bit Pulse-Width Modulation (PWM)
Dimming for Each Channel
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Selectable 220Hz, 250Hz, 280Hz, or 330Hz
The MP3326A integrates a digital interface with
up to 10 configurable digital interface addresses
via an external resistor. This means that the
MP3326A can support up to 10 cascaded ICs to
drive the LED array. Each channel can be
enabled or disabled via the digital interface.
PWM Dimming Frequency (fPWM
Refresh Signal Output
Digital Interface
)
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10 Addresses Configurable via an External
Resistor
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Configurable ILED Slew Rate
40μs Phase Shift
Fault Indicator
LED Open Protection
LED Short Protection with Configurable
Threshold
The MP3326A employs both separate pulse-
width 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 ramp rate and phase shift
can be configured to reduce EMI.
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Under-Voltage Lockout (UVLO) Protection
Over-Temperature Protection (OTP)
Available in a QFN-24 (4mmx4mm)
Package
The MP3326A can output a refresh signal from
the RFSH/FLT pin, where the refresh signal
frequency (fREFRESH) can be set via the digital
interface.
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Available in a Wettable Flank Package
Full protection features include LED open
protection, LED short protection, and over-
temperature 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.
APPLICATIONS
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RGB Drivers
LED Indicators
Instruments Clusters
General Displays
LED Backlighting
The MP3326A is available in a QFN-24
(4mmx4mm) package.
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.
MP3326A Rev. 1.0
6/8/2023
MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2023 MPS. All Rights Reserved.
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