Datasheet > MP3385B

MP3385B

更新时间： 2024-11-22 17:01:31

品牌	Logo	应用领域
芯源 - MPS		/
页数	文件大小	规格书
27页	890K
描述
带 I2C 接口的 4 串、80V 输出、WLED 控制

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MP3385B 数据手册

MP3385B

4-String, 80V Output

WLED Controller with I²C Interface

DESCRIPTION

FEATURES

The MP3385B is a step-up controller with four

regulated LED current (I_LED) channels, designed

to drive WLED arrays for mid-sized and large-

sized LCD panel backlighting applications.

•

4-String, Max 300mA/String WLED Driver

4.5V to 33V Input Voltage (V_IN) Range

80V Absolute Maximum Rating for Each

String

•

1.8% Current Matching Accuracy between

Each String

Unused Channel Auto-Detection during

Start-Up

100kHz to 900kHz Configurable Switching

Frequency (f_SW)

The MP3385B employs peak current control

mode and pulse-width modulation (PWM)

control architecture for system loop regulation.

The MP3385B drives an external MOSFET to

boost the output voltage (V_OUT) from a 4.5V to

33V input voltage (V_IN) supply.

Multiple Dimming Modes Selectable via the

The MP3385B provides an I²C digital interface

to flexibly set the operation and protection

modes, including dimming mode, the dimming

current and dimming ratio, over-current

protection (OCP), over-voltage protection

(OVP), the LED short protection threshold, and

the switching frequency (f_SW).

I²C Interface:

o Direct Pulse-Width Modulation (PWM)

Dimming Mode

o Internal, Fixed 23kHz PWM Dimming

Mode via I²C

o Analog Dimming Mode via Input Pulse

o Internal Analog Dimming Mode via I²C

o Mixed Dimming Mode via Input Pulse

o Internal Mixed Dimming Mode via I²C

2% to 100% Configurable Full-Scale

Current with 8-Bit Resolution

0% to 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

0.15V to 0.5V Latch-Off and Recoverable

Over-Current Protection (OCP) Threshold,

50mV/Step

For ease of use and board debugging, the

MP3385B automatically detects and disables

the unused LED strings during start-up to avoid

charging the output to the OVP threshold.

•

The MP3385B achieves 1.8% current matching

between each string. The low regulation voltage

on the LED current sources improves efficiency

and reduces power loss, which can result in a

higher current output.

The MP3385B supports analog, PWM, and

combined analog and PWM dimming modes to

meet different application requirements. Full

protection features include OCP, over-

temperature protection (OTP), under-voltage

protection (UVP), OVP, LED short and open

protection, and inductor and diode short

protection.

•

Recoverable Thermal Shutdown Protection

Available in a QFN-20 (4mmx4mm)

Package

APPLICATIONS

The MP3385B is available in a QFN-20

(4mmx4mm) package.

•

Desktop LCD Flat-Panel Displays

All-in-One PCs

2D and 3D LCD TVs

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.

MP3385B Rev. 1.0

7/20/2022

MonolithicPower.com

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

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与MP3385B相关器件

型号	品牌	获取价格	描述	数据表
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
MP3387L	MPS	获取价格	Step-up, 6 strings, Max.45mA/string, Combined Analog and PWM dimming, White LED Driver
MP3387LGRT	MPS	获取价格	Step-up, 6 strings, Max.45mA/string, Combined Analog and PWM dimming, White LED Driver

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