EV3376-R-00A
8-Channel, Synchronous,
Boost, WLED Driver with I
2
C Interface
EV3376-R-00A Rev.1.0 www.MonolithicPower.com 1
9/5/2016 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2016 MPS. All Rights Reserved.
The Future of Analog IC Technology
DESCRIPTION
The MP3376 is a synchronous boost converter
with 8 current channels designed to drive
WLED arrays for LCD-panel in tablet and
notebook backlighting applications.
The MP3376 uses peak-current mode and
PWM control to maintain boost converter
regulation. The MP3376 employs a standard
I
2
C digital interface to set operation mode,
switching frequency, full-scale current for each
channel, sync or non-sync mode, dimming
mode and duty, and various protection
thresholds.
MP3376 features high efficiency with small on
resistance of switching MOSFET. In addition,
the synchronous rectifier saves PCB size and
total BOM cost.
The MP3376 is available in QFN24 (4mmX4mm)
package.
ELECTRICAL SPECIFICATIONS
Parameter Symbol Value Units
Input Voltage V
IN
3 – 30 V
Output Voltage VLED <=34.5 V
LEDs # 8 string
LED Current I
LED
MAX:50/string mA
FEATURES
8-Channel with Max. 50mA/Channel
Synchronous Converter with LS-FET/HS–
FET 160m/260mΩ on Resistance
3V to 30V Input Voltage Range
Up to 36V Output Voltage
Max 2.5% Current Matching
350k / 500k / 650k / 800k / 950k / 1.2M /
1.8M / 2.4MHz Selectable Switching
Frequency
A0, A1 Pins for 4 PCS IC Selection
0mA to 50mA Full Scale Current Set, 8-bit,
0.196mA/step
Selectable Sync or Non-Sync Mode
Multi-Dimming Operation Mode Including:
1. Analog Dimming Mode through External
PWM Input
2. Analog Dimming Mode through I
2
C
interface
3. Mix dimming Mode through External
PWM Input with 6.25% / 12.5% / 25% /
50% Transfer Point
4. Mix Dimming Mode through I
2
C Interface
with 6.25% / 12.5% / 25% / 50%
Transfer Point
Customizable Default Register Values
Linear smooth dimming with 2 / 4 / 8 / 16 / 32
/ 64 / 128us for per step-slope set
Unused LED string auto disable during
Startup
LED short/open, OTP, OCP, Inductor or
Diode Short Protection
o 2.5 / 5 / 7.5 / 10V LED Short Threshold
o 24 / 31 / 36V OVP Threshold
o 1.8 / 2.5A Cycle by Cycle Current Limit
Free for Adjacent Pin Short Test
Available in QFN24 (4mmX4mm) package
APPLICATIONS
Tablet/Notebook
Auto-motive Display
ll MPS parts are lead-free, halogen free, and adhere to the RoHS directive. Fo
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and “The Future of Analog IC Technology” are Registered Trademarks o
Monolithic Power Systems, Inc.
