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| 型号： | TPS2390EVM |
| 厂商： | Texas Instruments |
| 文件页数： | 15/16页 |
| 文件大小： | 0K |
| 描述： | EVAL MOD FOR TPS2390 |
| 标准包装： | 1 |
| 主要目的： | 电源管理，热交换控制器 |
| 已用 IC / 零件： | TPS2390 |
| 已供物品： | 板 |
| 产品目录页面： | 1011 (CN2011-ZH PDF) |
| 相关产品： | TPS2390DGKRG4-ND - IC HOT SWAP PWR MGR 8-MSOP TPS2390DGKR-ND - IC HOT SWAP PWR MGR 8-MSOP TPS2390DGKG4-ND - IC HOT SWAP PWR MGR 8-MSOP 296-13511-5-ND - IC HOT SWAP PWR MGR 8-MSOP |
| 其它名称： | 296-20591 TPS2390EVM-ND |
SLUU150 – February 2003
If the target application requires fault timing other than that provided by the default EVM setup, a
new value of timing capacitor can be calculated from equation (3). When selecting from the
readily available capacitor values for the result of equation (3), default to a slightly larger, rather
than smaller, capacitor.
C FLT +
55
t FLT
3.75
(3)
where
?
?
C FLT is the calculated value in microfarads,
t FLT is the desired timeout period in seconds
4.6
Using the EN Pin to Adjust Undervoltage Lockout (UVLO)
The TPS2390 and TPS2391 devices have an internal UVLO circuit, which keeps the load
disabled when the input supply voltage is low. The internal threshold is set to a nominal 30 V, at
the RTN input with respect to – VIN, with a maximum specification value of 36 V. This setting is
targeted at general telecom applications. However, it is possible to raise the minimum start-up
threshold, and potentially tighten the tolerance window of the UVLO function, by using the
enable input comparator.
Where the desired UVLO voltage is greater (more negative) than the internal threshold, a
resistor divider on the input supply can be used to enable the load at this minimum voltage level.
The divided down input voltage then drives the EN pin. Resistor patterns R1 and R2 are
provided on the EVM to implement this function. The nominal enable comparator threshold is
1.4 V. Assuming the default R1 value of 200 k ? is used, the value of R2 is determined from
Equation 4.
R2 +
1.4 V
V UV * 1.4V
200 k W
(4)
where V UV is the desired UVLO threshold.
For example, to adjust the nominal UVLO to 40 V, the value of R2 required is 7.25 k ? , per
equation (4). Using the standard value of 7.32 k ? , the expected threshold is 39.65 V.
Evaluation Modules for Simple – 48-V Hot Swap Controllers
15
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS2391DGK | 功能描述:热插拔功率分布 Simple-48V Hot Swap Controller 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 |
| TPS2391DGKG4 | 功能描述:热插拔功率分布 Simple-48V Hot Swap Controller 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 |
| TPS2391DGKR | 功能描述:热插拔功率分布 Simple-48V Hot Swap Controller 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 |
| TPS2391DGKRG4 | 功能描述:热插拔功率分布 Simple-48V Hot Swap Controller 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 |
| TPS2391EVM | 功能描述:电源管理IC开发工具 Simple -48V Hot Swap Contr EVM 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 |
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