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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： | 14/28页 |
| 文件大小： | 966K |
| 代理商： | TPS2458RHBR |
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Layout Considerations
LOADCURRENT
PATH
LOADCURRENT
PATH
(a)
(b)
*ADDITIONAL DETAILSOMITTEDFORCLARITY.
SENSE
RESISTOR
TPS2458
R
SET
TPS2458
14 13
15
R
SET
14 13
15
www.ti.com ............................................................................................................................................................................................ SLUS916 – FEBRUARY 2009
TPS2458 applications require layout attention to ensure proper performance and minimize susceptibility to
transients and noise. In general, all runs should be as short as possible but the list below deserves first
consideration.
1. Decoupling capacitors on IN12 and IN3 should have minimal length to the pin and to GND.
2. SENM and SENP runs must be short and run side by side to maximize common mode rejection. Kelvin
3. SET runs need to be short on both sides of RSET.
4. These runs should be as short as possible and sized to carry at least 20 A, more if possible.
a.
Runs on both side of RSENSE.
b.
Runs from the drains and sources of the external FETs.
5. Runs from the BLK FETs to OUT12 should be as short as possible.
6. Runs connecting to IN3 and OUT3 should be sized for 1 A or more.
7. Connections to GND and SUM pins should be minimized after the runs above have been placed.
8. The device will dissipate low average power so soldering the powerpad to the board is not a requirement.
However, doing so will improve thermal performance and reduce susceptibility to noise.
Figure 23. Recommended RSENSE Layout
Copyright 2009, Texas Instruments Incorporated
21
Product Folder Link(s): TPS2458
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| 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 |
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| 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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