- 您现在的位置：买卖IC网 > PDF目录69252 > PTH03030WAZT (TEXAS INSTRUMENTS INC) 1-OUTPUT DC-DC REG PWR SUPPLY MODULE PDF资料下载
参数资料
| 型号： | PTH03030WAZT |
| 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： | ROHS COMPLIANT, DIP-13 |
| 文件页数： | 18/22页 |
| 文件大小： | 587K |
| 代理商： | PTH03030WAZT |
Application Notes
For technical support and further information, visit http://power.ti.com
PTH03030W & PTH05030W
Capacitor Recommendations for
the PTH03030 &
PTH05030 Series of Power Modules
Input Capacitor
The recommended input capacitor(s) is determined by
the 1,500 F (1) minimum capacitance and 900 mArms
minimum ripple current rating.
Ripple current and <100 m
equivalent series resistance
(ESR) values are the major considerations, along with
temperature, when designing with different types of
capacitors. Unlike polymer tantalum, conventional tan-
talum capacitors have a recommended minimum voltage
rating of 2
× (maximum DC voltage + AC ripple). This
is standard practice to ensure reliability.
For improved ripple reduction on the input bus, ceramic
capacitors may be used to complement electrolytic types
and achieve the minimum required capacitance.
Output Capacitors (Optional)
For applications with load transients (sudden changes in
load current), regulator response will benefit from an
external output capacitance. The recommended output
capacitance of 330 F will allow the module to meet
its transient response specification (see product data sheet).
For most applications, a high quality computer-grade
aluminum electrolytic capacitor is most suitable. These
capacitors provide adequate 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 recom-
mended. When using one or more non-ceramic 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 1-1.
Ceramic Capacitors
Above 150 kHz the performance of aluminum electrolytic
capacitors becomes less effective. To further improve the
reflected input ripple current or the output transient
response, multilayer ceramic capacitors can also be added.
Ceramic capacitors have very low ESR and their resonant
frequency is higher than the bandwidth of the regulator.
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 ce-
ramic capacitors in parallel with values of 10 F or greater.
Tantalum Capacitors
Tantalum type capacitors can be used at both the input
and output, 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 consider-
ably higher ESR, reduced power dissipation and lower
ripple current capability. These capacitors are also less
reliable when determining their power dissipation and
surge current capability. 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 will be encoun-
tered well before the maximum capacitance value is
reached.
Capacitor Table
Table 1-1 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.
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 100kHz) are critical parameters necessary to insure
both optimum regulator performance and long capacitor life.
Designing for Very Fast Load Transients
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
optional value of output capacitance. As the di/dt of a
transient is increased, the response of a converter’s regu-
lation 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.
If the transient performance requirements exceed that
specified in the data sheet, or the total amount of load
capacitance is above 3,000 F, the selection of output
capacitors becomes more important. For further guidance
consult the separate application note, “Selecting Capaci-
tors for PTH Products in High-Performance Applications.”
相关PDF资料 |
PDF描述 |
|---|---|
| PTH03030WAD | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| PTH03060WAD | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| PTH03060WAS | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| PTH03060WAZ | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| PTH03060WAZT | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
相关代理商/技术参数 |
参数描述 |
|---|---|
| PTH03050 | 制造商:EMERSON-NETWORKPOWER 制造商全称:Emerson Network Power 功能描述:DC-DC CONVERTERS POLA Non-isolated |
| PTH03050W | 制造商:TI 制造商全称:Texas Instruments 功能描述:6-A, 5-V Input Non-Isolated Wide-Output Adjust Power Module |
| PTH03050WAD | 功能描述:DC/DC转换器 6A 3.3V-In Wide Adj Module w/ Auto-Track 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: |
| PTH03050WADT | 制造商:ARTESYN 制造商全称:Artesyn Technologies 功能描述:DC-DC CONVERTERS POLA Non-isolated |
| PTH03050WAH | 功能描述:DC/DC转换器 6A 3.3V-In Wide Adj Module w/ Auto-Track 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。