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參數(shù)資料
| 型號： | PTH12040WAST |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| 封裝： | DIP-20 |
| 文件頁數(shù)： | 27/27頁 |
| 文件大?。?/td> | 633K |
| 代理商： | PTH12040WAST |
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Tantalum Capacitors
Capacitor Table
Designing for Very Fast Load Transients
www.ti.com............................................................................................................................................... SLTS237G – DECEMBER 2004 – REVISED MARCH 2009
Tantalum type capacitors are only used on the output bus, and are recommended for applications where the
ambient operating temperature is less than 0°C. The AVX TPS, Sprague 593D/594/595 and Kemet T495/T510
capacitor series are suggested over many other tantalum types due to their higher rated surge, power
dissipation, and ripple current capability. As a caution, many general purpose tantalum capacitors have higher
ESR, reduced power dissipation, and lower ripple current capability. These capacitors are also less reliable due
to their reduced power dissipation and surge current ratings. Tantalum capacitors that have no stated ESR or
surge current rating are not recommended for power applications.
When specifying OS-CON and polymer-tantalum capacitors for the output, the minimum ESR limit is encountered
well before the maximum capacitance value is reached.
Table 1 identifies the characteristics of capacitors from a number of vendors with acceptable ESR and ripple
current (rms) ratings. The recommended number of capacitors required at both the input and output buses is
identified for each capacitor type.
Note: This is not an extensive capacitor list. Capacitors from other vendors are available with comparable
specifications. Those listed are for guidance. The RMS ripple current rating and ESR (at 100 kHz) are critical
parameters necessary to insure both optimum regulator performance and long capacitor life.
The transient response of the dc/dc converter has been characterized using a load transient with a di/dt of
1 A/s. The typical voltage deviation for this load transient is given in the data sheet specification table using the
mnimum required value of output capacitance. As the di/dt of a transient is increased, the response of a
converter’s regulation circuit ultimately depends on its output capacitor decoupling network. This is an inherent
limitation with any dc/dc converter once the speed of the transient exceeds its bandwidth capability. If the target
application specifies a higher di/dt or lower voltage deviation, the requirement can only be met with additional
output capacitor decoupling. In these cases special attention must be paid to the type, value and ESR of the
capacitors selected.
Copyright 2004–2009, Texas Instruments Incorporated
9
Product Folder Link(s): PTH12040W
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| PTH12040WAZ | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PTH12040WAZ | 功能描述:DC/DC轉(zhuǎn)換器 8.0-14Vin 5.5V 50A 2.045" x1.045"x0.357 RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸: |
| PTH12040WAZT | 功能描述:DC/DC轉(zhuǎn)換器 8.0-14Vin 5.5V 50A 2.045" x1.045"x0.357 RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸: |
| PTH12045WAD | 制造商:Texas Instruments 功能描述: |
| PTH12045WAZ | 制造商:Texas Instruments 功能描述:- Rail/Tube |
| PTH12050 | 制造商:EMERSON-NETWORKPOWER 制造商全稱:Emerson Network Power 功能描述:DC-DC CONVERTERS |
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