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参数资料
| 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： | 10/28页 |
| 文件大小： | 966K |
| 代理商： | TPS2458RHBR |
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R
SENSE
R
SUM
R
SET
+
SET
SENM
SUM12
IN12
675mV
+
100mV
Fast Trip
Comparator
+
30 mA
PASS
A1
A2
SENP
Fault Timer Programming
F
T
1.35 V
t
C
10 A
=
m
(6)
SLUS916 – FEBRUARY 2009 ............................................................................................................................................................................................ www.ti.com
A system capable of powering an 80-W AdvancedMC module consumes a maximum of 8.25 A according to
MicroTCA specifications. The above equation suggests RSET = 417 . The nearest 1% EIA value equals 422
. The selection of RSET for MicroTCA power modules is described in the Redundant vs. Non-redundant Inrush
Current Limiting section.
Figure 19. 12-V Channel Threshold Circuitry
The fault timer of the two channels in a TPS2458 use identical internal circuitry. Each channel requires an
external capacitor CT connected between the CTx pin and ground. When a channel goes into current limit, the
TPS2458 injects 10
A into the external capacitor. If the channel remains in current limit long enough for the
voltage on the CTx pin to reach 1.35 V, then the TPS2458 shuts the channel down and pulls the FLTx pin low to
declare a fault. If the channel does not remain in current limit long enough to trip the timer, then the CTx
capacitor is discharged through an internal 200-
pulldown resistor. The nominal fault time tF is shown in
The user should select capacitors that provide the shortest fault times sufficient to allow down-stream loads and
bulk capacitors to charge. Shorter fault times reduce the stresses imposed on the pass FETs under fault
conditions. This consideration may allow the use of smaller and less expensive FETs for the 12-V channels.
18
Copyright 2009, Texas Instruments Incorporated
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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