- 您现在的位置：买卖IC网 > PDF目录98066 > PTV08T250WAD (TEXAS INSTRUMENTS INC) 1-OUTPUT DC-DC REG PWR SUPPLY MODULE PDF资料下载
参数资料
| 型号： | PTV08T250WAD |
| 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 |
| 文件页数： | 4/30页 |
| 文件大小： | 795K |
| 代理商： | PTV08T250WAD |
第1页第2页第3页当前第4页第5页第6页第7页第8页第9页第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
TurboTrans Technology
TurboTrans Selection
SLTS260E – OCTOBER 2005 – REVISED NOVEMBER 2008 .......................................................................................................................................... www.ti.com
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. The 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 is 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 is reduced. Applications requiring tight transient voltage tolerances
and minimized capacitor footprint area benefit from this technology.
Using TurboTrans requires connecting a resistor, RTT, between the +Sense pin (pin 1) and the TurboTrans pin
(pin 9). The value of the resistor directly corresponds to the amount of output capacitance added. All T2 products
require a minimum value of output capacitance whether or not TurboTrans is used. For the PTV08T250W, the
minimum required capacitance is 660
F. When using TurboTrans, capacitors with a capacitance X ESR product
below 10,000
Fxm are required. (Multiply the capacitance (in F) by the ESR (in m) to determine the
capacitance X ESR product.) See the Capacitor Selection section of the data sheet for a variety of capacitors
that meet this criteria.
Figure 9 through Figure 14 show the amount of output capacitance required to meet a desired transient voltage
deviation
with
and
without
TurboTrans
for
several
capacitor
types;
TypeA
(e.g.ceramic),
TypeB
(e.g.polymer-tantalum), and TypeC (e.g.OS-CON). To calculate the proper value of RTT, first determine the
required transient voltage deviation limits and magnitude of the transient load step. Next, determine the type of
output capacitors to be used. (If more than one type of output capacitor is used, select the capacitor type that
makes up the majority of the total output capacitance.) Knowing this information, use the chart in Figure 9,
through Figure 14, 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 the 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 the transient
voltage deviation. The required RTT resistor value can then be calculated using Equation 1 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% (12.5 A), 50% (25 A), and 75% (37.5 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 Equation 1 or selected from the TurboTrans table.
As an example, look at a 12-V input application requiring a 75 mV deviation during a 25 A, 50% load transient. A
majority of 330
F, 10m (C X ESR=3300Fxm) output capacitors are used. Use the 12 V, Type B capacitor
chart, Figure 11. Dividing 75mV by 25A gives 3mV/A transient voltage deviation per amp of transient load step.
Select 3 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 2000
F. The required R
TT resistor value for
2000
F can then be calculated or selected from Table 3. The required R
TT resistor is approximately 7.5k.
To see the benefit of TurboTrans, follow the 3 mV/A marking across to the Without TurboTrans plot. Following
that point down shows that a minimum of 5800
F of output capacitance is required to meet the same deviation
limit. This is the benefit of TurboTrans. A typical TurboTrans application schematic and TurboTrans waveforms
12
Copyright 2005–2008, Texas Instruments Incorporated
Product Folder Link(s): PTV08T250W
相关PDF资料 |
PDF描述 |
|---|---|
| PTV12010WAD | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| PTV12010WAH | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| PVX003A0X43-SRZ | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| PVX006A0X43-SRZ | DC-DC REG PWR SUPPLY MODULE |
| PVX006A0X3-SRZ | DC-DC REG PWR SUPPLY MODULE |
相关代理商/技术参数 |
参数描述 |
|---|---|
| PTV08T250WAH | 功能描述:DC/DC转换器 50A 8-14V-Inp/Wide Out Adj Vert Pwr Mdl 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: |
| PTV09 | 制造商:BOURNS 制造商全称:Bourns Electronic Solutions 功能描述:9 mm Potentiometer |
| PTV09A-2015F-A102 | 制造商:BOURNS 制造商全称:Bourns Electronic Solutions 功能描述:9 mm Potentiometer |
| PTV09A-2015F-A202 | 制造商:BOURNS 制造商全称:Bourns Electronic Solutions 功能描述:9 mm Potentiometer |
| PTV09A-2015F-A502 | 制造商:BOURNS 制造商全称:Bourns Electronic Solutions 功能描述:9 mm Potentiometer |
发布紧急采购，3分钟左右您将得到回复。