- 您现在的位置：买卖IC网 > PDF目录69254 > PTH08T261WAD (TEXAS INSTRUMENTS INC) 1-OUTPUT DC-DC REG PWR SUPPLY MODULE PDF资料下载
参数资料
| 型号： | PTH08T261WAD |
| 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 COMPLIAT PACKAGE-10 |
| 文件页数： | 10/38页 |
| 文件大小： | 1206K |
| 代理商： | PTH08T261WAD |
第1页第2页第3页第4页第5页第6页第7页第8页第9页当前第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页
SLTS272F
– DECEMBER 2006 – REVISED APRIL 2011
TURBOTRANS
TurboTrans
Technology
TurboTrans technology is a feature introduced in the T2 generation of the PTH/PTV family of power modules.
TurboTrans optimizes the transient response of the regulator with added external capacitance using a single
external resistor. Benefits of this technology include reduced output capacitance, minimized output voltage
deviation following a load transient, and enhanced stability when using ultra-low ESR output capacitors. The
amount of output capacitance required to meet a target output voltage deviation will be reduced with TurboTrans
activated. Likewise, for a given amount of output capacitance, with TurboTrans engaged, the amplitude of the
voltage deviation following a load transient will be reduced. Applications requiring tight transient voltage
tolerances and minimized capacitor footprint area will benefit greatly from this technology.
TurboTrans
Selection
Using TurboTrans requires connecting a resistor, RTT, between the +Sense pin (pin 5) and the TurboTrans pin
(pin 8). The value of the resistor directly corresponds to the amount of output capacitance required. All T2
products require a minimum value of output capacitance whether or not TurboTrans is used. For the
PTH08T260W, the minimum required capacitance is 200
μF. When using TurboTrans, capacitors with a
capacitance
× ESR product below 10,000 μF×m are required. (Multiply the capacitance (in μF) by the ESR (in
m
) to determine the capacitance × ESR product.) See the Capacitor Selection section of the datasheet for a
variety of capacitors that meet this criteria.
Figure 10 through Figure 15 show the amount of output capacitance required to meet a desired transient voltage
deviation with and without TurboTrans for several capacitor types; Type A (e.g. ceramic), Type B (e.g.
polymer-tantalum), and Type C (e.g. OS-CON). To calculate the proper value of RTT, first determine your
required transient voltage deviation limits and magnitude of your transient load step. Next, determine what type
of output capacitors will be used. (If more than one type of output capacitor is used, select the capacitor type that
makes up the majority of your total output capacitance). Knowing this information, use the chart in Figure 10
through Figure 15 that corresponds to the capacitor type selected. To use the chart, begin by dividing the
maximum voltage deviation limit (in mV) by the magnitude of your load step (in Amps). This gives a mV/A value.
Find this value on the Y-axis of the appropriate chart. Read across the graph to the 'With TurboTrans' plot. From
this point, read down to the X-axis which lists the minimum required capacitance, CO, to meet that transient
voltage deviation. The required RTT resistor value can then be calculated using the equation or selected from the
TurboTrans table. The TurboTrans tables include both the required output capacitance and the corresponding
RTT values to meet several values of transient voltage deviation for 25% (0.75 A), 50% (1.5 A), and 75% (2.25 A)
output load steps.
The chart can also be used to determine the achievable transient voltage deviation for a given amount of output
capacitance. Selecting the amount of output capacitance along the X-axis, reading up to the 'With TurboTrans'
curve, and then over to the Y-axis, gives the transient voltage deviation limit for that value of output capacitance.
The required RTT resistor value can be calculated using the equation or selected from the TurboTrans table.
As an example, let's look at a 12-V application requiring a 24 mV deviation during an 1.5 A, 50% load transient.
A majority of 330
μF, 10 m ouput capacitors are used. Use the 12 V, Type B capacitor chart, Figure 12.
Dividing 24 mV by 1.5 A gives 16 mV/A transient voltage deviation per amp of transient load step. Select
16 mV/A on the Y-axis and read across to the 'With TurboTrans' plot. Following this point down to the X-axis
gives us a minimum required output capacitance of approximately 600
μF. The required RTT resistor value for
600
To see the benefit of TurboTrans, follow the 16 mV/A marking across to the 'Without TurboTrans' plot. Following
that point down shows that you would need 3000
μF of output capacitance to meet the same transient deviation
limit. This is the benefit of TurboTrans. A typical TurboTrans schematic is shown in Figure 16.
18
Copyright
2006–2011, Texas Instruments Incorporated
相关PDF资料 |
PDF描述 |
|---|---|
| PTH08T260WAST | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| PTH08T261WAST | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| PTH08T260WAD | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| PTH08T260WAZ | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| PTH08T261WAZ | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
相关代理商/技术参数 |
参数描述 |
|---|---|
| PTH08T261WAS | 功能描述:DC/DC转换器 3A 4.5V-14Vin Cer Cap Adj Pwr 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: |
| PTH08T261WAST | 功能描述:DC/DC转换器 3A 4.5V-14Vin Cer Cap Adj Pwr 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: |
| PTH08T261WAZ | 功能描述:DC/DC转换器 3-A 4.5V-14V Input Cer Cap Vers Non-Iso 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: |
| PTH08T261WAZT | 功能描述:DC/DC转换器 3A 4.5V-14Vin Cer Cap Adj Pwr 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: |
| PTH-11810-B | 功能描述:罩类、盒类及壳类产品 3.58"x 3.11"x 1.77" 1-way, black RoHS:否 制造商:Bud Industries 产品:Boxes 外部深度:6.35 mm 外部宽度:6.35 mm 外部高度:2.56 mm NEMA 额定值: IP 等级: 材料:Acrylonitrile Butadiene Styrene (ABS) 颜色:Red |
发布紧急采购，3分钟左右您将得到回复。