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MP3378E Datasheet Preview

MP3378E Datasheet

4-Channel WLED Controller

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MP3378E
4-Channel WLED Controller
with High-Efficiency Buck Converter
DESCRIPTION
The MP3378E is a one-chip solution specially
designed for monitor applications. The
MP3378E includes a step-up WLED controller
with four current channels for backlighting, and
a high-efficiency buck converter for internal bus
voltage or standby power.
The 4-string WLED controller drives an external
MOSFET to boost up the output voltage from
the input supply. It regulates the current in each
LED string to the programmed value set by an
external current setting resistor. It supports both
analog and PWM dimming independently to
meet special dimming mode requests. Full
protection features for the WLED controller
include OCP, OTP, UVP, OVP, LED short/open
protection, and inductor/diode short protection.
The high-efficiency buck converter operates in
the current mode operation with a built-in
MOSFET and a built-in synchronous rectifier. It
offers a very compact solution to achieve
excellent load and line regulation. Full
protection features for the buck converter
include OCP and thermal shutdown.
The MP3378E is available in a TSSOP-28 EP
package.
FEATURES
WLED Controller:
4-String, Max 350mA/String, WLED
Controller
Up to 24V Input Voltage Range
2.5% Current Matching Accuracy
Programmable Switching Frequency
PWM and Analog Dimming Mode
LED Open and Short Protection
Programmable Over-Voltage Protection
Recoverable Thermal Shutdown Protection
Over-Current Protection
Over-Temperature Protection
Inductor/Diode Short Protection
Buck Converter:
144mΩ/80mΩ Low RDS(ON) Internal Power
MOSFETs
Low Quiescent Current
Fixed 235kHz Switching Frequency
Frequency Sync from 250kHz to 2MHz
External Clock
Internal Soft Start
OCP and Hiccup Mode
Over-Temperature Protection
Output Adjustable from 0.8V
APPLICATIONS
Desktop LCD Flat Panel Displays
Flat Panel Video Displays
2D/3D LCD TVs and Monitors
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” and “The Future of Analog IC Technology” are registered trademarks of
Monolithic Power Systems, Inc.
MP3378E Rev. 1.02
www.MonolithicPower.com
1
5/26/2017
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2017 MPS. All Rights Reserved.




MPS

MP3378E Datasheet Preview

MP3378E Datasheet

4-Channel WLED Controller

No Preview Available !

MP3378E 4-CHANNEL WLED CONTROLLER WITH BUCK CONVERTER
TYPICAL APPLICATION
VIN
C1
L1
D1
C2
R3
C4
VIN
C4
22µF
24
VIN1
C3
25
VCC1
26
COMP
27
EN1
R2
2
OSC
4
ADIM
28 PWM
R4 3
ISET
15
VIN2
SYNC
21
SYNC
14
C6
0.1µF
13
VCC2
EN2
23
GATE
22
ISENSE
GND1 1
M1
R1
9
OVP
MP3378
E
8
LED1
7
LED2
6
LED3
LED4
BST
SW
5
20 R5
47Ω
16
C7
0.1µF
12
R6
FB
51k
GND2
19
AGND
17, 18
R10
R9
L2 10µH
R7
40.2k
R8
7.5k
5V
C5
66µF
MP3378E Rev. 1.02
www.MonolithicPower.com
2
5/26/2017
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2017 MPS. All Rights Reserved.


Part Number MP3378E
Description 4-Channel WLED Controller
Maker MPS
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MP3378E Datasheet PDF






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