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SC657ULTRT

更新时间： 2024-09-19 06:10:19
品牌 Logo 应用领域
商升特 - SEMTECH 驱动器
页数 文件大小 规格书
22页 463K
描述
Backlight Driver for 5 LEDs with SemPulseTM Interface

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中文翻译

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SC657ULTRT 技术参数

是否Rohs认证： 符合生命周期：Obsolete
零件包装代码：QFN包装说明：MLPQ-14
针数：14Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.84数据输入模式：SERIAL
接口集成电路类型：LED DISPLAY DRIVERJESD-30 代码：S-XQCC-N14
长度：2 mm复用显示功能：NO
功能数量：1区段数：5
端子数量：14最高工作温度：85 °C
最低工作温度：-40 °C封装主体材料：UNSPECIFIED
封装代码：VQCCN封装等效代码：LCC14,.08SQ,16
封装形状：SQUARE封装形式：CHIP CARRIER, VERY THIN PROFILE
峰值回流温度（摄氏度）：NOT SPECIFIED电源：3.7 V
认证状态：Not Qualified座面最大高度：0.6 mm
子类别：Display Drivers最大供电电压：5.5 V
最小供电电压：2.9 V标称供电电压：3.7 V
表面贴装：YES温度等级：INDUSTRIAL
端子形式：NO LEAD端子节距：0.4 mm
端子位置：QUAD处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：2 mmBase Number Matches：1

SC657ULTRT 数据手册

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SC657  
Backlight Driver for 5 LEDs  
with SemPulseTM Interface  
POWER MANAGEMENT  
Features  
Description  
Input supply voltage range — 2.9V to 5.5V  
Very high efficiency charge pump driver system with  
three modes — ꢀx, ꢀ.5x and 2x  
Five programmable current sinks — 0mA to 25mA  
Up to three LED grouping options  
Fade-in/fade-out feature for main LED bank  
Charge pump frequency — 250kHz  
SemPulse single wire interface  
Backlight current accuracy — ꢀ.5% typical  
Backlight current matching — 0.5% typical  
LED float detection  
The SC657 is a high efficiency charge pump LED driver  
using Semtech’s proprietary charge pump technology.  
Performance is optimized for use in single-cell Li-ion  
battery applications.  
The charge pump provides backlight current utilizing five  
matched current sinks. The load and supply conditions  
determine whether the charge pump operates in ꢀx, ꢀ.5x,  
or 2x mode. An optional fading feature that gradually  
adjusts the backlight current is provided to simplify  
control software.  
Automatic sleep mode (LEDs off) — IQ = 60µA (typ.)  
Shutdown current — 0.ꢀµA (typical)  
Ultra-thin package — 2 x 2 x 0.6 (mm)  
Fully WEEE and RoHS compliant  
The SC657 uses the proprietary SemPulseTM single wire  
interface to control all functions of the device, including  
backlight currents. The single wire interface minimizes  
microcontroller and interface pin counts. The five LEDs  
can be grouped in up to three separate banks that can be  
independently controlled.  
Applications  
Cellular phones, smart phones, and PDAs  
LCD modules  
Portable media players  
Digital cameras  
Personal navigation devices  
Display/keypad backlighting and LED indicators  
The SC657 enters sleep mode when all the LED drivers are  
disabled. In this mode, the quiescent current is reduced  
while the device continues to monitor the SemPulse  
interface.  
With a 2 x 2 (mm) package and four small capacitors, the  
SC657 provides a complete LED driver solution with a  
minimal PCB footprint.  
Typical Application Circuit  
VBAT = 2.9 to 5.5V  
IN  
OUT  
COUT  
CIN  
2.2µF  
2.2µF  
SC657  
BL1  
BL2  
BL3  
BL4  
BL5  
SemPulse  
Interface  
SPIF  
GND  
C1+ C1- C2+ C2-  
C1  
2.2µF  
C2  
2.2µF  
US Patents: 6,504,422; 6,794,926  
ꢀ
April 3, 2009  
© 2009 Semtech Corporation  
1234567...22

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