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| 型号： | TPS2458RHBR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC32 |
| 封装： | PLASTIC, QFP-32 |
| 文件页数： | 11/28页 |
| 文件大小： | 966K |
| 代理商： | TPS2458RHBR |
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Multiswap Operation in Redundant Systems
TPS2458
Backplane
SUM3
SUM12
R
S
U
M
3
R
S
U
M
1
2
PowerSource1
TPS2458
SUM3
SUM12
PowerSource2
TPS2458
SUM3
SUM12
PowerSource1
TPS2458
SUM3
SUM12
PowerSource2
MicroTCA TM Redundancy
MultiswapRedundancy
Backplane
R
S
U
M
1
2
R
S
U
M
3
m C
R
S
U
M
3
R
S
U
M
1
2
m C
www.ti.com ............................................................................................................................................................................................ SLUS916 – FEBRUARY 2009
TheTPS2458 features an additional mode of operation called Multiswap redundancy. This technique does not
require a microcontroller, making it simpler and faster than the redundancy schemes described in the
MicroTCAstandard. Multiswap is especially attractive for AdvancedMC applications that require redundancy
but need not comply with the MicroTCA power module standard.
In order to implement Multiswap redundancy, connect the SUM pins of the redundant channels together and tie a
single RSUM resistor from this node to ground. The current limit thresholds now apply to the sum of the currents
delivered by the redundant supplies. When implementing Multiswap redundancy on 12-V channels, all of the
channels must use the same values of resistors for RSENSE and RSET.
Figure 20 compares the redundancy technique advocated by the MicroTCA specification with Multiswap
redundancy. MicroTCA redundancy independently limits the current delivered by each power source. The
current drawn by the load cannot exceed the sum of the current limits of the individual power sources. Multiswap
redundancy limits the current drawn by the load to a fixed value regardless of the number of operational power
sources. Removing or inserting power sources within a Multiswap system does not affect the current limit seen
by the load.
Figure 20. MicroTCA Redundancy vs. Multiswap Redundancy
Copyright 2009, Texas Instruments Incorporated
19
Product Folder Link(s): TPS2458
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TPS2458RHBT | 功能描述:热插拔功率分布 12V/3.3V Hot Swap & ORing 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 |
| TPS2458RHBT | 制造商:Texas Instruments 功能描述:Hot Swap Controllers TI |
| TPS2459EVM | 功能描述:电源管理IC开发工具 Full-Ftd AdvMC Slot Controller 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 |
| TPS2459RHBR | 功能描述:热插拔功率分布 3V/12V Hot Swap & ORing 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 |
| TPS2459RHBT | 功能描述:热插拔功率分布 3V/12V Hot Swap & ORing 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 |
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