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参数资料
| 型号： | LT3474IFE-1#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 14/20页 |
| 文件大小： | 0K |
| 描述： | IC LED DRVR HP CONS CURR 16TSSOP |
| 标准包装： | 2,500 |
| 恒定电流： | 是 |
| 拓扑： | PWM，降压（降压） |
| 输出数： | 1 |
| 内部驱动器： | 是 |
| 类型 - 主要： | 车载，背光 |
| 类型 - 次要： | 颜色，白色 LED |
| 频率： | 200kHz ~ 2MHz |
| 电源电压： | 3.5 V ~ 36 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm）裸露焊盘 |
| 供应商设备封装： | 16-TSSOP-EP |
| 包装： | 带卷 (TR) |
| 工作温度： | -40°C ~ 125°C |
LT3474/LT3474-1
APPLICATIONS INFORMATION
Diode Selection
The catch diode (D1 from Figure 1) conducts current only
during switch off time. Average forward current in normal
Table 4 lists several Schottky diodes and their
manufacturers.
Table 4. Schottky Diodes
operation can be calculated from:
V R
I AVE
V F at 0.5A
V F at 1A
I D ( AVG ) =
I OUT ( V IN – V OUT )
V IN
PART NUMBER
On Semiconductor
MBR0520L
(V)
20
(A)
0.5
(mV)
385
(mV)
The only reason to consider a diode with a larger current
rating than necessary for nominal operation is for the
worst-case condition of shorted output. The diode cur-
rent will then increase to one half the typical peak switch
current.
Peak reverse voltage is equal to the regulator input voltage.
Use a diode with a reverse voltage rating greater than the
MBR0540
MBRM120E
MBRM140
Diodes Inc.
B0530W
B120
B130
B140 HB
40
20
40
30
20
30
40
0.5
1
1
0.5
1
1
1
510
430
620
530
550
500
500
530
input voltage.
International Recti?er
If using the PWM mode of the LT3474, select a diode with
10BQ030
30
1
420
low reverse leakage.
3474fd
14
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3474IFE-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Step-Down 1A LED Driver |
| LT3474IFE-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:Step-Down 1A LED Driver |
| LT3475 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Step-Down l 1.5A LED Driver |
| LT3475-1 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Dual Step-Down l 1.5A LED Driver |
| LT3475EFE | 制造商:Linear Technology 功能描述:LED DRVR 2Segment 5V/9V/12V/15V/18V/24V 20-Pin TSSOP EP |
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