MY9183SS [MY-SEMI]

8-Channel High Accuracy Constant Current LED Driver With Error Diagnostics & Power Saving & Global Current Control;


型号：	MY9183SS
厂家：	MY-SEMI INC.
描述：	8-Channel High Accuracy Constant Current LED Driver With Error Diagnostics & Power Saving & Global Current Control
文件：	总1页 (文件大小：75K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

MY9183

8-Channel High Accuracy Constant Current LED Driver

With Error Diagnostics & Power Saving & Global Current Control

MY-Semi

General Description

Features

✦ 3.0V ~ 5.5V Operating supply voltage

✦ 3~120mA/5V Constant current output range

✦ 3~115mA/3.3V Constant current output range

✦ 17V Rated output channels for long LED strings

✦ ±1.5% (typ.) LED Current accuracy between channels

✦ ±3% (typ.) LED Current accuracy between chips

✦ ±0.1% Output current regulation capability

✦ Compulsory error detection includes LED Open, LED

Short, Output port leakage, Output short to GND,

Output short to Power

The MY9183, 8-channel constant current LED driver

operates over a 3.0V ~ 5.5V input voltage range, supports

error diagnostics, power saving function and current gain

control. The device provides 8 open-drain constant

current sinking outputs that are rated to 17V and delivers

up to 120mA of high accuracy current to each string of

LED. The current at each output is programmable by

means of an external current-sensing resistor and can be

adjusted by 256 steps. The MY9183 features a fast

30MHz DCK input, allowing large amount data transfer

and

a wide LED dimming (on/off) range to be

implemented. The MY9183 offers a 4-wire serial interface,

a 8-bit shift register, and a 8-bit transparent latch. The

serial interface allows a microcontroller to configure the

output channels using four inputs (DI, DCK, LAT, and

ENB) and a data output (DO). DO allows multiple drivers

to be cascaded and operated together.

✦ Real time error detection includes LED Open, LED Short

✦ Compulsory error detection with 0.1mA

✦ Fast error detection: 80ns (min.)

✦ Short detection threshold voltage selection

(2 / 3 / 4 / 4.5 Volt)

✦ Power saving mode: sleep mode and 0-data mode

✦ Sleep mode to lower down the supply current to 0.1uA

✦ 0-data mode to lower down the supply current to 0.1uA

✦ Over-temperature warning

The MY9183 provides compulsory error detection. Under

compulsory error detection, the display image will not be

affected since the interval and current are small. Differing

from error mode selections; the specified diagnostic can be

performed. The error will be stored back to the shift

the threshold voltage for LED short detection can be

selected to comply with different LED string configuration.

✦ 8bits global current control: ranges from 8% to 100%

✦ 50ns fast current transient response

✦ Output current setting by one external resister

✦ Schmitt trigger input

The MY9183 is available in a 16-pin SOP / SSOP

package and specified over the -40°C to +85°C ambient

temperature range.

✦ Power on reset

✦ Stagger output delay for EMI reduction

✦ -40°C to +85°C Ambient temperature range

Applications

❑ Traffic Signals/Signs

Order information

PART

PACKAGE INFORMATION

❑ Variable Message Sign (VMS)

❑ Public Transportation (Train, Bus, Underground)

❑ Indoor and Outdoor Video Display

MY9183SB

SOP16-300mil-1.27mm

SSOP16-150mil-0.635mm

1000 pcs/Reel

2500 pcs/Reel

MY9183SS

❑

LCD Display Backlighting

Typical Operating Circuits

Pin Configuration

Power

System

Controller

DCK

LAT

ENB

Nov. 2010 Ver. 0.5

MY-Semi Inc.

For pricing, delivery, and ordering information, pleases contact MY-Semi Inc. at +886-3-658-5656,

or email to INFO@MY-Semi.com.tw or visit MY-Semi’s website at www.MY-Semi.com or www.MY-Semi.com.tw