- 您现在的位置：买卖IC网 > PDF目录98066 > PTV03020WAH (TEXAS INSTRUMENTS INC) 1-OUTPUT DC-DC REG PWR SUPPLY MODULE PDF资料下载
参数资料
| 型号： | PTV03020WAH |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| 封装： | SIP-12 |
| 文件页数： | 16/19页 |
| 文件大小： | 434K |
| 代理商： | PTV03020WAH |
www.ti.com
APPLICATION INFORMATION
Capacitor Recommendations for the PTV03020W Power Module
Input Capacitors
Output Capacitor (Optional)
Ceramic Capacitors
Tantalum Capacitors
SLTS243A – FEBRUARY 2005 – REVISED OCTOBER 2007
The required input capacitors are a 22-F ceramic and a minimum of 680-F electrolytic type. For VO > 1 V and
IO > 11 A , the 680-F capacitance must be rated for 750 mArms ripple current capability. For all other
conditions, the ripple current rating must be at least 500 mArms. Where applicable, Table 1 gives the maximum
output voltage and current limits for a capacitor's rms ripple current rating.
The above ripple current requirements are conditional that the 22-F ceramic capacitor is present. The 22-F
X5R/X7R ceramic capacitor is necessary to reduce both the magnitude of ripple current through the electroytic
capacitor and the amount of ripple current reflected back to the input source. Ceramic capacitors should be
located within 0.5 inch. (1,3 cm) of the module's input pins. Additional ceramic capacitors can be added to reduce
the RMS ripple current requirement for the electrolytic capacitor.
Ripple current (rms) rating, less than 100-m
equivalent series resistance (ESR), and temperature are the 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). This is standard practice to
ensure reliability. Only a few tantalum capacitors were found to have 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.
For applications with load transients (sudden changes in load current), regulator response benefits from external
output capacitance. The recommended output capacitance of 330 F allows the module to meet its 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
when ambient temperatures are above 0
°C. For operation 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.
Above 150 kHz, the performance of aluminum electrolytic capacitors is less effective. Multilayer ceramic
capacitors have 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 as well as 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 approximately 300 F. Also, to prevent the formation of local resonances, do not place more
than five identical ceramic capacitors in parallel with values of 10 F or greater.
Tantalum-type capacitors can only be used 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 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
considerably higher ESR, reduced power dissipation, and lower ripple current capability. These capacitors are
also less reliable as they have 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
before the maximum capacitance value is reached.
6
Copyright 2005–2007, Texas Instruments Incorporated
Product Folder Link(s) :PTV03020W
相关PDF资料 |
PDF描述 |
|---|---|
| PTV05010WAH | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| PTV08T250WAH | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| PTV08T250WAD | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| PTV12010WAD | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| PTV12010WAH | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
相关代理商/技术参数 |
参数描述 |
|---|---|
| PTV05010 | 制造商:ARTESYN 制造商全称:Artesyn Technologies 功能描述:DC-DC CONVERTERS POLA Non-isolated |
| PTV05010W | 制造商:TI 制造商全称:Texas Instruments 功能描述:8-A, 5-V INPUT NONISOLATED WIDE-OUTPUT ADJUST SIP MODULE |
| PTV05010WAD | 功能描述:DC/DC转换器 28.8W 0.8-3.6V 8A RoHS:否 制造商:Murata 产品: 输出功率: 输入电压范围:3.6 V to 5.5 V 输入电压（标称）: 输出端数量:1 输出电压（通道 1）:3.3 V 输出电流（通道 1）:600 mA 输出电压（通道 2）: 输出电流（通道 2）: 安装风格:SMD/SMT 封装 / 箱体尺寸: |
| PTV05010WAH | 功能描述:DC/DC转换器 8A 5V-In Wide-Out Adj SIP Module RoHS:否 制造商:Murata 产品: 输出功率: 输入电压范围:3.6 V to 5.5 V 输入电压（标称）: 输出端数量:1 输出电压（通道 1）:3.3 V 输出电流（通道 1）:600 mA 输出电压（通道 2）: 输出电流（通道 2）: 安装风格:SMD/SMT 封装 / 箱体尺寸: |
| PTV05020 | 制造商:EMERSON-NETWORKPOWER 制造商全称:Emerson Network Power 功能描述:DC-DC CONVERTERS |
发布紧急采购，3分钟左右您将得到回复。