Datasheet > MP3385A

MP3385A

更新时间： 2024-11-26 01:22:43

品牌	Logo	应用领域
芯源 - MPS		/
页数	文件大小	规格书
25页	688K
描述
4-String, 80V Output, WLED Controller with I2C Interface

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MP3385A 数据手册

MP3385A

4-String, 80V Output,

WLED Controller with I²C Interface

The Future of Analog IC Technology

DESCRIPTION

FEATURES

The MP3385A is a step-up controller with four

regulated current channels designed to drive

WLED arrays for mid- and large-sized LCD

panel backlighting applications.



4-String, Max 300mA/String WLED Driver

4.5V to 33V Input Voltage Range

80V ABS Rating for Each String

1.8% Current Matching Accuracy for Each

String

The MP3385A uses peak-current mode and

PWM control architecture for system loop

regulation. The MP3385A drives an external

MOSFET to boost up the output voltage from a

4.5V-to-33V input supply.

The MP3385A employs an I²C digital interface

that can flexibly set operation and protection

modes, including dimming mode, dimming

current and dimming ratio, OCP, OVP, LED

short protection threshold, and switching

frequency. For easy application use and board

debugging, the MP3385A detects and disables

the unused LED strings automatically during

start-up to avoid charging the output to the OVP

threshold.



Unused Channel Auto-Detection Function

during Start-Up

100kHz-900kHz Programmable Switching

Frequency

Multiple Dimming Modes Selected by I²C

Interface

o Direct PWM Dimming Mode

o Internal Fixed 23kHz PWM Dimming

Mode by I²C

o Analog Dimming Mode by Input Pulse

o Internal Analog Dimming Mode by I²C

o Mixed Dimming Mode by Input Pulse

o Internal Mixed Dimming Mode by I²C

2%-100% Programmable Full Scale Current

with 8-Bit Resolution

0%-100% LED Dimming Range with 10-Bit

Resolution for Internal Dimming Mode

Cascading Capability with a Single Power

Source

18V to 80V Over-Voltage Protection (OVP),

2V/Step



The MP3385A achieves 1.8% current matching

between each string. The low regulation voltage

on the LED current sources improves efficiency

and reduces power loss to achieve a higher

current output.

The MP3385A supports analog, PWM, and

combined analog and PWM dimming modes to

meet different application requirements. Full

0.15V to 0.5V Latch-Off/Recoverable Over-

Current Protection (OCP) Threshold,

50mV/Step

protection

features

include

over-current



Recoverable Thermal Shutdown Protection

protection (OCP), over-temperature protection

(OTP), under-voltage protection (UVP), over-

voltage protection (OVP), LED short/open

protection, and inductor/diode short protection.

APPLICATIONS



Desktop LCD Flat Panel Displays

All-in-One PCs

2D/3D LCD TVs

The MP3385A is available in a QFN-20

(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” and “The Future of Analog IC Technology” are registered

trademarks of Monolithic Power Systems, Inc.

MP3385A Rev. 1.01

8/29/2017

www.MonolithicPower.com

MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.

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与MP3385A相关器件

型号	品牌	获取价格	描述	数据表
MP3385AGR	MPS	获取价格	4-String, 80V Output, WLED Controller with I2C Interface
MP3385B	MPS	获取价格	带 I2C 接口的 4 串、80V 输出、WLED 控制
MP3386DR	MPS	获取价格	LED Driver, 6-Segment, 4 X 4 MM, MO-220VGGD, QFN-24
MP3386DR-LF	MPS	获取价格	LED Driver, 6-Segment, 4 X 4 MM, ROHS COMPLIANT, MO-220VGGD, QFN-24
MP3386DR-Z	MPS	获取价格	LED Driver, 6-Segment, 4 X 4 MM, MO-220VGGD, QFN-24
MP3386EY	MPS	获取价格	LED Driver, 6-Segment, PDSO28, MS-013AE, SOIC-28
MP3386EY-LF	MPS	获取价格	LED Driver, 6-Segment, PDSO28, ROHS COMPLIANT, MS-013AE, SOIC-28
MP3386EY-LF-Z	MPS	获取价格	LED Driver, 6-Segment, PDSO28, ROHS COMPLIANT, MS-013AE, SOIC-28
MP3387A	MPS	获取价格	6-String, Max 80mA/String, Step-Up, White LED Driver with Combined Analog and PWM Dimming
MP3387AGRT	MPS	获取价格	6-String, Max 80mA/String, Step-Up, White LED Driver with Combined Analog and PWM Dimming

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