MPQ3369
6-Channel, Maximum 100mA/Ch
Boost WLED Driver
with 15000:1 Dim Ratio and I2C
DESCRIPTION
FEATURES
The MPQ3369 is a step-up converter with six
channel current sources. It is designed to drive
white LED arrays as backlighting for small- or
medium-sized LCD panels.
3.5V to 36V Input Voltage Range
6 Channels with Max 100mA per Channel
Internal 100mΩ, 50V MOSFET
Configurable Switching Frequency Up to
2.2MHz
External Sync SW Function
Multi-Dimming Operation Mode through
PWM Input, Including:
o Direct PWM Dimming
o Analog Dimming
o Mix Dimming with 25% or 12.5%
Transfer Point
The device uses peak current mode as its PWM
control architecture to regulate the boost
converter. Six channel current sources are
applied into the LED cathode to adjust the LED
brightness. The MPQ3369 regulates the current
in each LED string to the value set via an
external current-setting resistor, with 2.5%
current regulation accuracy between strings.
15000:1 Dimming Ratio in PWM Dimming
at fPWM ≤ 200Hz
A low on resistor MOSFET and a low headroom
voltage are provided to improve efficiency. The
MPQ3669 has a standard I2C digital interface for
easy use. The switching frequency can be
configured via a resistor, I2C interface, or
external clock.
200:1 Dimming Ratio at Analog Dimming
through PWM Dimming Signal Input
Excellent EMI Performance, Frequency
Spread Spectrum
I2C Interface
Phase Shift Function for PWM Dimming
2.5% Current Matching
Cycle-by-Cycle Current Limit
Disconnect VOUT from VIN
Optional LED Current Auto-Decrement at
High Temperatures
The MPQ3369 provides analog, PWM, and mix
dimming modes with a PWM input. The dimming
mode can be selected with the I2C interface or
the MIX/AD pin. The device also has a phase
shift function to eliminate noise during PWM
dimming.
Robust protections guarantee safe operation of
the device, and include over-current protection
(OCP), over-voltage protection (OVP), over-
temperature protection (OTP), and LED short
and open protection. The MPQ3669 can also be
configured to automatically decrease the LED
current at high temperatures.
LED Short/Open, OTP, OCP, Inductor
Short Protection
Configurable LED Short Threshold
Configurable OVP Threshold
Fault Indicator Signal Output
Allow to Connect Multiple LEDx Pins for
One LED String
Available in a QFN-24 (4mmx4mm)
Package
The MPQ3369 is available in a QFN-24
(4mmx4mm) package.
APPLICATIONS
Tablets/Notebooks
Automotive Displays
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.
MPQ3369 Rev. 1.0
4/17/2020
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2020 MPS. All Rights Reserved.
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