- 您现在的位置：买卖IC网 > PDF目录98065 > PTH05050YAST (TEXAS INSTRUMENTS INC) 1-OUTPUT DC-DC REG PWR SUPPLY MODULE PDF资料下载
参数资料
| 型号： | PTH05050YAST |
| 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： | DIP-6 |
| 文件页数： | 18/18页 |
| 文件大小： | 1004K |
| 代理商： | PTH05050YAST |
www.ti.com
CAPACITOR RECOMMENDATIONS FOR THE PTH12050Y DDR POWER MODULES
Input Capacitor
Output Capacitors
Ceramic Capacitors
Tantalum Capacitors
Capacitor Table
PTH03050Y
PTH05050Y
PTH12050Y
SLTS221A–MARCH 2004–REVISED OCTOBER 2005
PTH12050Y (12-V OPTION)
The recommended input capacitance is determined by the 560 F minimum capacitance and 750 mArms
minimum ripple current rating. A ≥10-F 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.
For applications with load transients (sudden changes in load current), regulator response will benefit from
external output capacitance. The recommended minimum output capacitance of 940 F will allow the module to
meet its transient response specification (see Electrical Specifications table). 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
non-ceramic capacitors, the calculated equivalent ESR should be no lower than 4 m (8 m using the
manufacturer's maximum ESR for a single capacitor)
A list of preferred low-ESR type capacitors are identified in Table 2.
In addition to electrolytic capacitance, adding a 10-F to 22-F 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-F ceramic capacitor.
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 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 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.
Table 2 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.
9
相关PDF资料 |
PDF描述 |
|---|---|
| PTH05060WAS | 1-OUTPUT 36 W DC-DC REG PWR SUPPLY MODULE |
| PTH05060WAD | 1-OUTPUT 36 W DC-DC REG PWR SUPPLY MODULE |
| PTH05060WAST | 1-OUTPUT 36 W DC-DC REG PWR SUPPLY MODULE |
| PTH05060WAH | 1-OUTPUT 36 W DC-DC REG PWR SUPPLY MODULE |
| PTH05T210WAZ | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
相关代理商/技术参数 |
参数描述 |
|---|---|
| PTH05050YAZ | 功能描述:DC/DC转换器 6A 5V-In Bus Term Pwr Mdl for DDR/QDR 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: |
| PTH05050YAZT | 功能描述:DC/DC转换器 6A 5V-In Bus Term Pwr Mdl for DDR/QDR 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: |
| PTH05060 | 制造商:ARTESYN 制造商全称:Artesyn Technologies 功能描述:DC-DC CONVERTERS POLA Non-isolated |
| PTH05060W | 制造商:TI 制造商全称:Texas Instruments 功能描述:10-A, 5-V Input Non-Isolated Wide-Output Adjust Power Module |
| PTH05060WAD | 功能描述:DC/DC转换器 4.5-5.5Vin 3.6V 10A 0.995" x0.620"x0.354 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: |
发布紧急采购，3分钟左右您将得到回复。