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参数资料
| 型号： | TPS2400DBVR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO5 |
| 封装： | GREEN, PLASTIC, SOT-23, 5 PIN |
| 文件页数： | 14/18页 |
| 文件大小： | 536K |
| 代理商： | TPS2400DBVR |
TPS2400
SLUS599A JUNE 2004 REVISED AUGUST 2008
5
www.ti.com
APPLICATION INFORMATION
Overvoltage Protection
An overvoltage condition is commonly created in these situations.
D Unplugging a wall adapter from an AC outlet. Energy stored in the transformer magnetizing inductance is
released and spikes the output voltage.
D Powering an appliance with the wrong voltage adapter (user error)
D Automotive load dump due to ignition, power windows, or starter motor (for example)
D An AC power-line transient
D Power switch contact bounce (causes power supply/distribution inductive kick), (See Figure 2)
Many electronic appliances use a transient voltage suppressor (TVS) for overvoltage protection as shown in
Figure 2. The TVS is typically a metal-oxide varister (MOV) or Transzorb. The former is a non-linear resistor
with a soft turn-on characteristic whereas the latter is a large junction zener diode with a very sharp turn-on
characteristic. These devices have high pulse-power capability and pico-second response time. A TVS clamps
the load voltage to a safe level so the load operates uninterrupted in the presence of power supply
output-voltage spikes. But in the event of a voltage surge, fuse F2 blows and must be replaced to restore
operation.
UDG04057
VS
LS
RS
F1
Appliance
Power Supply
+
TVS
LOAD
F2
S1
Figure 2. Load Protection Using Transient Voltage Suppressor Clamps
The TPS2400 circuit in Figure 3 protects the load from an overvoltage, not by clamping the load voltage like
a TVS, but by disconnecting the load from the power supply. The circuit responds to an overvoltage in less than
1
s and rides out a voltage surge without blowing fuse F2. Note that the voltage surge can be of indefinite
duration.
The load can see a voltage spike of up to 1
s, the amount of time it takes the TPS2400 to disconnect the load
from the power supply. A low-power zener diode D2 can be used to clamp the load voltage to a safe level. In
most cases, diode D2 is not necessary since the load bypass capacitor (not shown) forms a low-pass filter with
resistor RS and inductor LS to significantly attenuate the spike.
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| TPS2400DBVRG4 | 功能描述:热插拔功率分布 Overvltg/Undervltg Protection IC RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| TPS2400DBVT | 功能描述:热插拔功率分布 Overvltg/Undervltg Protection IC RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| TPS2400DBVTG4 | 功能描述:热插拔功率分布 Overvltg/Undervltg Protection IC RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
| TPS2410EVM | 功能描述:电源管理IC开发工具 TPS2410 Eval Mod RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| TPS2410PW | 功能描述:热插拔功率分布 N+1 OR-ing Pwr Rail Cntrlr RoHS:否 制造商:Texas Instruments 产品:Controllers & Switches 电流限制: 电源电压-最大:7 V 电源电压-最小:- 0.3 V 工作温度范围: 功率耗散: 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Tube |
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