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参数资料
型号： LT3517EUF#PBF
厂商： Linear Technology
文件页数： 1/20页
文件大小： 0K
描述： IC LED DRIVER AUTOMOTIVE 16-QFN
标准包装： 91
系列： True Color PWM™
恒定电流： 是
恒定电压： 是
拓扑： PWM，降压（降压），升压（升压）
输出数： 1
内部驱动器： 无
类型 - 主要： 车载，背光
类型 - 次要： 白色 LED
频率： 250kHz ~ 2.5MHz
电源电压： 3 V ~ 30 V
输出电压： 7V
安装类型： 表面贴装
封装/外壳： 16-WQFN 裸露焊盘
供应商设备封装： 16-QFN（4x4）
包装： 管件
工作温度： -40°C ~ 125°C
LT3517
Full-Featured LED Driver
with 1.5A Switch Current
5000:1 True Color PWM ? Dimming Ratio
1.5A, 45V Internal Switch
100mV High Side Current Sense
Open LED Protection
Adjustable Frequency: 250kHz to 2.5MHz
Wide Input Voltage Range:
Operates in Boost, Buck Mode and Buck-Boost Mode
Gate Driver for PMOS LED Disconnect
Constant-Current and Constant-Voltage Regulation
CTRL Pin Provides 10:1 Analog Dimming
Low Shutdown Current: <1μA
Available in (4mm × 4mm) 16-Lead QFN and 16-Pin
FEATURES
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Operation from 3V to 30V
Transient Protection to 40V
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TSSOP Packages
APPLICATIONS
DESCRIPTION
The LT ? 3517 is a current mode DC/DC converter with an
internal 1.5A, 45V switch specifically designed to drive
LEDs. The LT3517 operates as a LED driver in boost,
buck mode and buck-boost mode. It combines a tradi-
tional voltage loop and a unique current loop to operate
as a constant-current source or constant-voltage source.
Programmable switching frequency allows optimization of
the external components for efficiency or component size.
The switching frequency of LT3517 can be synchronized
to an external clock signal. The LED current is externally
programmable with a 100mV sense resistor. The external
PWM input provides up to 5000:1 LED dimming. The CTRL
pin provides further 10:1 dimming ratio.
The LT3517 is available in the tiny footprint 16-lead QFN
(4mm × 4mm) and the 16-pin TSSOP packages. The
LT3517 provides a complete solution for both constant-
voltage and constant-current applications.
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Display Backlighting
Automotive and Avionic Lighting
Illumination
Scanners
L , LT, LTC, LTM, Burst Mode, 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, 7746300.
TYPICAL APPLICATION
1A Buck Mode LED Driver
Efficiency
PV IN
24V
V IN
3.3V
2.2μF
2.2μF
100m
ISP ISN
V IN
SHDN
LT3517
TG
SW
1A
10μF
15μH
100
90
80
70
60
CTRL = V RE F
V REF
CTRL
FB
PWM
PWM
SS
50
SYNC RT
TGEN V REF VC GND
0.1μF
16.9k
1MHz
0.1μF
40
0
20
40 60 80
PWM DUTY CYCLE (%)
100
3517 TA01b
3517 TA01a
3517fg
For more information www.linear.com/LT3517
1
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相关代理商/技术参数
参数描述
LT3517EUF-TRPBF 制造商:LINER 制造商全称:Linear Technology 功能描述:Full-Featured LED Driver with 1.5A Switch Current
LT3517HFE#PBF 功能描述:IC LED DRIVR AUTOMOTIVE 16-TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:True Color PWM™ 标准包装:6,000 系列:- 恒定电流:- 恒定电压:- 拓扑:开路漏极，PWM 输出数:4 内部驱动器:是 类型 - 主要:LED 闪烁器 类型 - 次要:- 频率:400kHz 电源电压:2.3 V ~ 5.5 V 输出电压:- 安装类型:表面贴装 封装/外壳:8-VFDFN 裸露焊盘 供应商设备封装:8-HVSON 包装:带卷 (TR) 工作温度:-40°C ~ 85°C 其它名称:935286881118PCA9553TK/02-TPCA9553TK/02-T-ND
LT3517HFE#TRPBF 功能描述:IC LED DRIVR AUTOMOTIVE 16-TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:True Color PWM™ 标准包装:6,000 系列:- 恒定电流:- 恒定电压:- 拓扑:开路漏极，PWM 输出数:4 内部驱动器:是 类型 - 主要:LED 闪烁器 类型 - 次要:- 频率:400kHz 电源电压:2.3 V ~ 5.5 V 输出电压:- 安装类型:表面贴装 封装/外壳:8-VFDFN 裸露焊盘 供应商设备封装:8-HVSON 包装:带卷 (TR) 工作温度:-40°C ~ 85°C 其它名称:935286881118PCA9553TK/02-TPCA9553TK/02-T-ND
LT3517HFE-PBF 制造商:LINER 制造商全称:Linear Technology 功能描述:Full-Featured LED Driver with 1.5A Switch Current
LT3517HFE-TRPBF 制造商:LINER 制造商全称:Linear Technology 功能描述:Full-Featured LED Driver with 1.5A Switch Current
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