- 您现在的位置：买卖IC网 > PDF目录44997 > LTC4352HMS#TRPBF (LINEAR TECHNOLOGY CORP) 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO12 PDF资料下载
参数资料
| 型号： | LTC4352HMS#TRPBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO12 |
| 封装： | LEAD FREE, PLASTIC, MSOP-12 |
| 文件页数： | 2/16页 |
| 文件大小： | 218K |
| 代理商： | LTC4352HMS#TRPBF |
LTC4352
10
4352fa
applicaTions inForMaTion
Figure 6. Inrush and Ideal Diode Control on a Hot Swap Card
LTC4352
PLUG-IN CARD
CONNECTORS
BACKPLANE
Q2
Si7336ADP
Q1
Si7336ADP
TO LOAD
NC
4352 F06
VIN
UV
CPO
OV
SOURCE GATE OUT
GND
12V
GND
105k
0.1F
CG
10k
R6
10
RG
5.11k
R2
R3
Z1
Z1: DIODES INC. SMAJ12A
Inrush Control
The LTC4352 can be used for inrush control in applications
where the input supply is hot-plugged. See Figure 6. The
CPO capacitor is omitted, since fast turn-on with stored
charge is not desired here. Undervoltage holds the gate
off till the short pin makes contact. 40s after the UV level
is satisfied, the MOSFET gate ramps up due to the CPO
pull-up current. A RC network on the gate further slows
down the output dV/dt, while allowing fast turn-off during
reverse current or overvoltage conditions. Resistor RG
prevents high frequency oscillations in Q2. A dedicated
hot swap controller may be needed if overcurrent protec-
tion is also desired.
Undervoltage and Overvoltage Protection
Unlike a regular diode, the LTC4352 can prevent out of
range input voltages from affecting the load voltage. This
requires back-to-back MOSFETs, and resistive dividers
from the input to the UV and OV pins. For an example,
see Figure 5.
MOSFET Q2 is required to block conduction through the
body diode of Q1 when its gate is held off. The resistive
dividers set up the input voltage range where the ideal
diode control is allowed to operate. Outside this range,
the gate is held off and the FAULT pin pulls low.
When using a CPO capacitor in circuit with back-to-back
MOSFETs, there will be a large inrush current to the load
capacitance due to the fast gate turn-on after UV, OV levels
are met. Without the capacitor, the inrush will depend on
the CPO pull-up current charging up the gate capacitance.
Figure 5. 5V Ideal Diode with UV and OV Protection
UV
LTC4352
FAULT
STATUS
VCC
31.6k
1%
1k
1%
3.09k
1%
C1
TO LOAD
5V
Q2
Si7336ADP
Q1
Si7336ADP
0.1F
4352 F05
CPO
VIN
SOURCE GATE
OUT
0.15F
C2
REV
GND
R2
R1
R3
OV
相关PDF资料 |
PDF描述 |
|---|---|
| LTC4352HDD#PBF | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO12 |
| LTC4352HDD#TRPBF | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO12 |
| LTC4357HMS8#PBF | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| LTC4357HDCB#TRMPBF | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO6 |
| LTC4357HDCB#TRPBF | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO6 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC4352IDD#PBF | 功能描述:IC IDEAL DIODE CNTRL 12-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - O 圈控制器 系列:- 标准包装:1,000 系列:- 应用:电池备份，工业/汽车，大电流开关 FET 型:- 输出数:5 内部开关:是 延迟时间 - 开启:100ns 延迟时间 - 关闭:- 电源电压:3 V ~ 5.5 V 电流 - 电源:250µA 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC N 包装:带卷 (TR) |
| LTC4352IDD#TRPBF | 功能描述:IC IDEAL DIODE CNTRL 12-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - O 圈控制器 系列:- 标准包装:1,000 系列:- 应用:电池备份，工业/汽车，大电流开关 FET 型:- 输出数:5 内部开关:是 延迟时间 - 开启:100ns 延迟时间 - 关闭:- 电源电压:3 V ~ 5.5 V 电流 - 电源:250µA 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC N 包装:带卷 (TR) |
| LTC4352IMS#PBF | 功能描述:IC IDEAL DIODE CNTRL 12-MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - O 圈控制器 系列:- 标准包装:1,000 系列:- 应用:电池备份，工业/汽车，大电流开关 FET 型:- 输出数:5 内部开关:是 延迟时间 - 开启:100ns 延迟时间 - 关闭:- 电源电压:3 V ~ 5.5 V 电流 - 电源:250µA 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC N 包装:带卷 (TR) |
| LTC4352IMS#TRPBF | 功能描述:IC IDEAL DIODE CNTRL 12-MSOP RoHS:是 类别:集成电路 (IC) >> PMIC - O 圈控制器 系列:- 标准包装:1,000 系列:- 应用:电池备份，工业/汽车，大电流开关 FET 型:- 输出数:5 内部开关:是 延迟时间 - 开启:100ns 延迟时间 - 关闭:- 电源电压:3 V ~ 5.5 V 电流 - 电源:250µA 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:16-SOIC（0.154"，3.90mm 宽） 供应商设备封装:16-SOIC N 包装:带卷 (TR) |
| LTC4352IMSPBF | 制造商:Linear Technology 功能描述:Ideal Diode Controller Monitoring MSOP12 |
发布紧急采购，3分钟左右您将得到回复。