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参数资料
| 型号： | LT4356IDE-3 |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO12 |
| 封装： | 4 X 3 MM, PLASTIC, M0-229WGED, DFN-12 |
| 文件页数： | 8/24页 |
| 文件大小： | 231K |
| 代理商： | LT4356IDE-3 |
LT4356-3
16
43563fa
First, calculate the resistive divider value to limit VOUT to
16V during an overvoltage event:
V
REG =
1.25V R1 + R2
()
R2
= 16V
Set the current through R1 and R2 during the overvoltage
condition to 250μA.
R2 =
1.25V
250μA
= 5kΩ
Choose 4.99kΩ for R2.
R1 =
16V – 1.25V
() R2
1.25V
= 58.88kΩ
The closest standard value for R1 is 59kΩ.
Next calculate the sense resistor, RSNS, value:
R
SNS =
50mV
I
LIM
=
50mV
5A
= 10mΩ
CTMR is then chosen for 1ms of early warning time:
C
TMR =
1ms 5μA
100mV
= 50nF
The closest standard value for CTMR is 47nF.
Finally, calculate R4 and R5 for the 6V low battery threshold
detection:
6V =
1.25V R4 + R5
()
R5
Choose 100kΩ for R5.
R4 =
6V – 1.25V
() R5
1.25V
= 380kΩ
Select 383kΩ for R4.
The pass transistor, Q1, should be chosen to withstand
the output short condition with VCC = 14V.
The total overcurrent fault time is:
t
OC =
47nF 0.85V
45.5μA
= 0.878ms
The power dissipation on Q1 equals to:
P =
14V 50mV
10mΩ
= 70W
These conditions are well within the Safe Operating Area
of IRLR2908.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT4356IDE-3#PBF | 功能描述:IC SURGE STOPPER W/LATCH 12-DFN RoHS:是 类别:过电压，电流，温度装置 >> 电涌抑制 IC 系列:- 产品培训模块:LT4356 Surge Stopper 产品目录绘图:LT4356 Output Graph LT4356 Series 10-MSOP 标准包装:2,500 系列:- 电压 - 工作:4 ~ 80V 电压 - 箝位:27V，可调 技术:混合技术 功率（瓦特）:- 电路数:1 应用:自动 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-MSOP 包装:带卷 (TR) 配用:DC1018B-C-ND - DEMO BOARD FOR LT4356-3DC1018B-B-ND - DEMO BOARD FOR LT4356-2DC1018B-A-ND - DEMO BOARD FOR LT4356-1 |
| LT4356IDE-3#PBF | 制造商:Linear Technology 功能描述:Hot Swap Controller IC |
| LT4356IDE-3#TRPBF | 功能描述:IC SURGE STOPPER ADJ 12-DFN RoHS:是 类别:过电压，电流，温度装置 >> 电涌抑制 IC 系列:- 产品培训模块:LT4356 Surge Stopper 产品目录绘图:LT4356 Output Graph LT4356 Series 10-MSOP 标准包装:2,500 系列:- 电压 - 工作:4 ~ 80V 电压 - 箝位:27V，可调 技术:混合技术 功率（瓦特）:- 电路数:1 应用:自动 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-MSOP 包装:带卷 (TR) 配用:DC1018B-C-ND - DEMO BOARD FOR LT4356-3DC1018B-B-ND - DEMO BOARD FOR LT4356-2DC1018B-A-ND - DEMO BOARD FOR LT4356-1 |
| LT4356IDE-3PBF | 制造商:Linear Technology 功能描述:Surge Protection Adj Regulator 4-80V 7uA |
| LT4356IDE-3TR | 制造商:LINER 制造商全称:Linear Technology 功能描述:Surge Stopper with Fault Latchoff |
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