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MP3387LGRT Datasheet Preview

MP3387LGRT Datasheet

White LED Driver

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The Future of Analog IC Technology
MP3387L
Step-up, 6 strings, Max.45mA/string,
Combined Analog
and PWM dimming, White LED Driver
DESCRIPTION
The MP3387L is a step-up converter with 6-
channel current sources. It is designed for
driving the white LED arrays as backlighting of
middle or large size LCD panel.
The MP3387L uses peak-current mode as its
PWM control architecture. The switching
frequency can be programmed by a resistor. It
generates an output voltage up to 45V from a
3V to 26V input supply. The MP3387L
independently regulates the current in each
LED string to the value set by an external
current-setting resistor.
The MP3387L applies 6 internal current
sources in each LED string terminal to achieve
a current balance with 3% current regulation
accuracy between strings. Its low 500mV
regulation voltage on LED current sources
reduces power loss.
The MP3387L features external digital PWM
dimming and analog dimming, both of which
sharing a single input with 25% PWM duty cycle
as a transfer point. The mix-dimming strategy
helps to improve the dimming ratio. Also,
MP3387L automatically transfers the PWM
input signal 100Hz to 20kHz frequency to
24kHz to 27.5kHz to eliminate the audible noise.
MP3387L has rich protection modes to
guarantee safety operation. The protection
modes include recoverable OCP (over-current
protection), OVP (over-voltage protection), OTP
(over-temperature protection), any string of LED
short and open protection.
The MP3387L is available in TQFN24-
4mmX4mm package.
FEATURES
6-String, Max 45mA/String
3V to 26V Input Voltage Range
3% Current Matching Accuracy Between
Strings
Programmable Switching Frequency
Selectable Combined Analog and PWM
Dimming Mode or Pure PWM Dimming
Mode
Combined Analog and PWM Dimming Mode
with 25% Dimming Transfer Point
24kHz to 27.5kHz Output Dimming
Frequency to eliminate audible noise
Programmable Over-Voltage Protection
Recoverable Thermal Shutdown Protection
Cycle by Cycle Over Current Protection
Under-Voltage Lockout
TQFN24 (4X4mm) Package
APPLICATIONS
Notebook PC
Small LCD TV
Handy Terminals Display
Automotive System and Tablet Computer
All MPS parts are lead-free, halogen free, and adhere to the RoHS directive. For
MPS green status, please visit MPS website under Quality Assurance.
“MPS” and “The Future of Analog IC Technology” are Registered Trademarks
of Monolithic Power Systems, Inc.
MP3387L Rev. 1.11
www.MonolithicPower.com
1
3/29/2016
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2016 MPS. All Rights Reserved.




MPS

MP3387LGRT Datasheet Preview

MP3387LGRT Datasheet

White LED Driver

No Preview Available !

MP3387L STEP UP, 6STRINGS,WHITE LED DRIVER
TYPICAL APPLICATION
VIN
C1
GND
L1
C2
R1
C3
R2
C4 24 23 22 21 20 19
EN
PWM
1
2 EN
FREQ
PGND 18
PGND 17
R4
3
NC MP3387L
16
OVP
4
15
Mix
LED1
5
14
AGND
LED2
6 PWMI
13
LED3
7 8 9 10 11 12
R3
VOUT
MP3387L Rev. 1.11
www.MonolithicPower.com
2
3/29/2016
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2016 MPS. All Rights Reserved.


Part Number MP3387LGRT
Description White LED Driver
Maker MPS
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