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参数资料
| 型号： | LT3519IMS-1#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 10/20页 |
| 文件大小： | 0K |
| 描述： | IC LED DRV HP CONST CURR 16MSOP |
| 标准包装： | 37 |
| 恒定电流： | 是 |
| 恒定电压： | 是 |
| 拓扑： | PWM，SEPIC，降压（降压），升压（升压） |
| 输出数： | 1 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 车载 |
| 频率： | 800kHz ~ 1.1MHz |
| 电源电压： | 3 V ~ 30 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TFSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 16-MSOP |
| 包装： | 管件 |
| 工作温度： | -40°C ~ 125°C |
LT3519/LT3519-1/LT3519-2
APPLICATIONS INFORMATION
V OUT = V BE(Q1) +
? 1.22V
V IN(FALLING) =
? 1.22V
For open LED protection of a boost type LED driver, set
the resistor from the output to the FB pin such that the
expected V FB during normal operation will not exceed
1.1V. For a buck mode or buck-boost mode LED driver,
the output voltage is typically level-shifted to a signal with
respect to GND as illustrated in Figure 2. The open LED
voltage level can be expressed as:
R1
R2
Programming the Turn-On and Turn-Off Thresholds
with the SHDN /UVLO Pin
The falling SHDN /UVLO value can be accurately set by
the resistor divider. A small 2.2μA pull-down current is
active when SHDN /UVLO is below the 1.22V threshold.
The purpose of this current is to allow the user to program
the rising hysteresis. The following equations should be
used to determine the values of the resistors:
R1 + R2
R2
V IN(RISING) = 2.2μA ? R1 + V IN(FALLING)
+
R SENSE(EXT)
R1 V
–
OUT
100k
LED
ARRAY
V IN
LT3519/
Q1
LT3519/
R1
LT3519-1/ FB
LT3519-2
R2
3519 F02
Figure 2. Open LED Protection FB Resistor Connector
LT3519-1/ SHDN /UVLO
LT3519-2
R2
3519 F03
Figure 3. SHDN /UVLO Threshold Programming
for Buck Mode or Buck-Boost Mode LED Driver
3519fa
10
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3519IMS-2#PBF | 功能描述:IC LED DVR W/SCHOTTKY DIO 16MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 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 |
| LT3519IMS-2#TRPBF | 功能描述:IC LED DVR W/DIO 2.2MHZ 16MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - LED 驱动器 系列:- 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 |
| LT3519IMSPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:LED Driver with Integrated Schottky Diode |
| LT3519IMSTRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:LED Driver with Integrated Schottky Diode |
| LT3524 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Regulating Pulse Width Modulator |
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