5秒后页面跳转
捷配首页

Datasheet > LT3955
LT3955 PDF预览

LT3955

更新时间： 2024-11-24 14:58:03
品牌 Logo 应用领域
亚德诺 - ADI 转换器
页数 文件大小 规格书
30页 419K
描述
具内部 PWM 发生器的 60VIN LED 转换器

阅读下载

中文翻译

获取价格

LT3955 数据手册

 浏览型号LT3955的Datasheet PDF文件第2页浏览型号LT3955的Datasheet PDF文件第3页浏览型号LT3955的Datasheet PDF文件第4页浏览型号LT3955的Datasheet PDF文件第5页浏览型号LT3955的Datasheet PDF文件第6页浏览型号LT3955的Datasheet PDF文件第7页 
LT3955  
60V LED Converter with  
IN  
Internal PWM Generator  
FeaTures  
DescripTion  
n
3000:1 True Color PWM™ Dimming for LEDs  
The LT®3955 is a DC/DC converter designed to operate as  
a constant-current source and constant-voltage regula-  
tor. It features an internal low side N-channel MOSFET  
rated for 80V/3.5A. The LT3955 is ideally suited for driv-  
ing high current LEDs, but also has features to make it  
suitable for charging batteries and supercapacitors. The  
fixed frequency, current mode architecture results in  
stable operation over a wide range of supply and output  
voltages. A voltage feedback pin serves as the input for  
severalLEDprotectionfeatures,andalsomakesitpossible  
for the converter to operate as a constant-voltage source.  
A frequency adjust pin allows the user to program the  
frequency from 100kHz to 1MHz to optimize efficiency,  
performance or external component size.  
n
Wide V Range: 4.5V to 60V  
IN  
n
n
n
n
Rail-to-Rail Current Sense Range: 0V to 80V  
Internal 80V/3.5A Switch  
Programmable PWM Dimming Signal Generator  
Constant Current ( 3%ꢀ and Constant-Voltage  
( 2%ꢀ Regulation  
n
n
Accurate Analog Dimming  
Drives LEDs in Boost, SEPIC, CUK, Buck Mode,  
Buck-Boost Mode, or Flyback Configuration  
Output Short-Circuit Protected Boost  
Open LED Protection and Reporting  
Adjustable Switching Frequency: 100kHz to 1MHz  
n
n
n
n
n
n
n
Programmable V UVLO with Hysteresis  
IN  
C/10 Indication for Battery Chargers  
Low Shutdown Current: <1µA  
Thermally Enhanced 5mm × 6mm QFN Package  
The LT3955 senses output current at the high side or at  
the low side of the load. The PWM input can be configured  
to self-oscillate at fixed frequency with duty ratio pro-  
grammable from 4% to 96%. When driven by an external  
signal, the PWM input provides LED dimming ratios of  
up to 3000:1. The CTRL input provides additional analog  
dimming capability.  
applicaTions  
n
High Power LEDs  
n
Output Short-Circuit Protected Boost  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and  
True Color PWM is a trademark of Linear Technology Corporation. All other trademarks are the  
property of their respective owners. Protected by U.S. Patents including 7199560, 7321203.  
n
Battery and SuperCap Chargers  
Accurate Current Limited Voltage Regulators  
n
Typical applicaTion  
94% Efficiency 20W Boost LED Driver with Internal PWM Dimming  
22µH  
V
IN  
5V TO 60V  
PWM Dimming Waveforms at  
Various DIM Voltage Settings  
4.7µF  
×2  
2.2µF  
×5  
499k  
147k  
V
SW  
IN  
EN/UVLO  
PGND  
V
= 8V  
PWM  
DIM  
DC  
= 97.2%  
V
ISP  
ISN  
REF  
1M  
V
= 3.87V  
PWM  
DIM  
DC  
LT3955  
0.82Ω  
300mA  
I
= 50%  
LED  
0.3A/DIV  
CTRL  
INTV  
CC  
V
= 1.47V  
DIM  
165k  
DC  
= 10%  
PWM  
PWM  
1M  
100k  
V
DC  
= 0V  
DIM  
FB  
= 2.8%  
VMODE  
DIM/SS  
PWM  
RT  
20W LED STRING  
124k  
3955 TA01b  
0.5ms/DIV  
16.9k  
DIM  
(CURRENT DERATED  
V
V
= 24V  
LED  
IN  
FOR V < 9V)  
SYNC  
PWMOUT  
IN  
= 65V  
V
C
GND GNDK INTV  
CC  
28.7k  
10nF  
350kHz  
INTV  
5.1k  
4.7nF  
CC  
47nF  
300Hz  
1µF  
3955 TA01a  
NOTE: GND, GNDK AND SIGNAL LEVEL COMPONENTS MUST BE CONNECTED EXTERNALLY AS SHOWN.  
AN INTERNAL CONNECTION BETWEEN GNDK AND PGND PINS PROVIDES GROUNDING TO THE SUPPLY.  
3955fb  
1
For more information www.linear.com/LT3955  
1234567...30

中文翻译

下载PDF

与LT3955相关器件

型号 品牌 获取价格 描述 数据表
LT3956 Linear

获取价格

 		80VIN, 80VOUT Constant-Current, Constant-Voltage Converter
LT3956 ADI

获取价格

 		80VIN、80VOUT 恒定电流、恒定电压转换器
LT3956EUHE#TRPBF Linear

获取价格

 		LT3956 - 80VIN, 80VOUT Constant-Current, Constant-Voltage Converter; Package: QFN; Pins: 3
LT3956EUHE-PBF Linear

获取价格

 		80VIN, 80VOUT Constant-Current, Constant-Voltage Converter
LT3956EUHE-TRPBF Linear

获取价格

 		80VIN, 80VOUT Constant-Current, Constant-Voltage Converter
LT3956IUHE#PBF Linear

获取价格

 		LT3956 - 80VIN, 80VOUT Constant-Current, Constant-Voltage Converter; Package: QFN; Pins: 3
LT3956IUHE-PBF Linear

获取价格

 		80VIN, 80VOUT Constant-Current, Constant-Voltage Converter
LT3956IUHE-TRPBF Linear

获取价格

 		80VIN, 80VOUT Constant-Current, Constant-Voltage Converter
LT3957 Linear

获取价格

 		Boost, Flyback, SEPIC and Inverting Converter with 5A, 40V Switch
LT3957A Linear

获取价格

 		Boost, Flyback, SEPIC and Inverting Converter

与LT3955相关文章

您还可以找


热门产品
PCB打样/小批量
铝基板
BOM智能配单
PCBA制造
钣金
精密CNC
模具注塑
薄膜开关
精选活动
PCBA打样特惠
四六层板品质升级
铝基板品质升级
一体化电子制造
DFM下载
服务支持
企业认证
产品展示
工厂展示
工艺能力
积分商城
关于捷配
捷配简介
企业文化
公司动态
人才招聘
联系我们
帮助中心
下单流程
付款流程
开票流程
常见问题
全球PCB制造服务专线 400-613-0088

工作时间：9:00-21:00

CEO邮箱：ceo@jiepei.com

投诉邮箱：tousu@jiepei.com

捷配网-微信公众号 微信公众号
捷配网-微信公众号 抖音公众号
资质认证：
合作快递：
支付方式：
Copyright © 2024 Jiepei.com Inc. All Rights Reserved. 版权所有:杭州捷配信息科技有限公司 浙公网安备 33010502006866号 浙ICP备10014259号-119 营业执照ICP证