參數(shù)資料
型號： PTH12060LAHT
廠商： Texas Instruments, Inc.
英文描述： 10-A, 12-V INPUT NON-ISOLATED WIDE-OUTPUT ADJUST POWER MODULE
中文描述： 10甲，12 V輸入非隔離寬輸出調(diào)節(jié)電源模塊
文件頁數(shù)： 9/29頁
文件大?。?/td> 1028K
代理商： PTH12060LAHT
www.ti.com
APPLICATION INFORMATION
CAPACITOR RECOMMENDATIONS FOR THE PTH12060 SERIES OF POWER MODULES
Input Capacitor
The recommended input capacitance is determined by the 560 μF minimum capacitance and 1050 mArms
minimum ripple current rating. A 10 μF X5R/X7R ceramic capacitor can be added to reduce the reflected input
ripple current. The ceramic capacitor should be located between the input electrolytic and the module.
Ripple current, less than 100 m
equivalent series resistance (ESR) and temperature, are major considerations
when selecting input capacitors. Unlike polymer-tantalum capacitors, regular tantalum capacitors have a
recommended minimum voltage rating of 2
×
(max. dc voltage + ac ripple). No tantalum capacitors were found
with sufficient voltage rating to meet this requirement. At temperatures below 0
°
C, the ESR of aluminum
electrolytic capacitors increases. For these applications, Os-Con, polymer-tantalum, and polymer-aluminum types
should be considered.
Output Capacitors (Optional)
For applications with load transients (sudden changes in load current), regulator response benefits from external
output capacitance. The value of 330 μF is used to define the transient response specification. For most
applications, a high quality, computer-grade aluminum electrolytic capacitor is adequate. These capacitors
provide decoupling over the frequency range, 2 kHz to 150 kHz, and are suitable for ambient temperatures
above 0
°
C. Below 0
°
C, tantalum, ceramic, or Os-Con type capacitors are recommended. When using one or
more nonceramic capacitors, the calculated equivalent ESR should be no lower than 4 m
(7 m
using the
manufacturer's maximum ESR for a single capacitor). A list of preferred low-ESR type capacitors are identified in
Table 1
.
In addition to electrolytic capacitance, adding a 10 μF X5R/X7R ceramic capacitor to the output reduces the
output ripple voltage and improves the regulator's transient response. The measurement of both the output ripple
and transient response is also best achieved across a 10 μF ceramic capacitor.
Ceramic Capacitors
Above 150 kHz, the performance of aluminum electrolytic capacitors is less effective. Multilayer ceramic
capacitors have a low ESR and a resonant frequency higher than the bandwidth of the regulator. They can be
used to reduce the reflected ripple current at the input, and improve the transient response of the output. When
used on the output, their combined ESR is not critical as long as the total value of ceramic capacitance does not
exceed 300 μF. Also, to prevent the formation of local resonances, do not place more than five identical ceramic
capacitors in parallel with values of 10 μF or greater.
Tantalum Capacitors
Tantalum type capacitors are most suited for use on the output bus, and are recommended for applications
where the ambient operating temperature can be less than 0
°
C. The AVX TPS, Sprague 593D/594/595, and
Kemet T495/T510 capacitor series are suggested over other tantalum types due to their higher rated surge,
power dissipation, and ripple current capability. As a caution, many general-purpose tantalum capacitors have
considerably higher ESR, reduced power dissipation, and lower ripple current capability. These capacitors are
also less reliable as they have lower power dissipation and surge current ratings. Tantalum capacitors that do not
have a 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.
Capacitor Table
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.
PTH12060W/L
SLTS217D–MAY 2003–REVISED OCTOBER 2005
9
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相關代理商/技術參數(shù)
參數(shù)描述
PTH12060LAS 功能描述:DC/DC轉換器 0.8 to 1.8V 10A 12V Input WideAdj Module 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）: 安裝風格:SMD/SMT 封裝 / 箱體尺寸:
PTH12060LAST 功能描述:DC/DC轉換器 0.8 to 1.8V 10A 12V Input WideAdj Module 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）: 安裝風格:SMD/SMT 封裝 / 箱體尺寸:
PTH12060LAZ 功能描述:DC/DC轉換器 0.8 to 1.8V 10A 12V Input WideAdj Module 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）: 安裝風格:SMD/SMT 封裝 / 箱體尺寸:
PTH12060LAZT 功能描述:DC/DC轉換器 10.8-13.2Vin 1.8V10A 0.995" x0.620"x0.354 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）: 安裝風格:SMD/SMT 封裝 / 箱體尺寸:
PTH12060W 制造商:ARTESYN 制造商全稱:Artesyn Technologies 功能描述:DC/DC CONVERTERS POLA Non-isolated
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