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| 型号： | PTH04T240FAD |
| 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-11 |
| 文件页数： | 7/35页 |
| 文件大小： | 3835K |
| 代理商： | PTH04T240FAD |
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TurboTrans Technology
TurboTrans Selection
www.ti.com ............................................................................................................................................... SLTS293A – DECEMBER 2008 – REVISED MARCH 2009
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 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 will be reduced. Applications requiring tight transient voltage
tolerances and minimized capacitor footprint area will benefit greatly from this technology.
Utilizing TurboTrans requires connecting a resistor, RTT, between the +Sense pin (pin6) and the TurboTrans pin
(pin9). The value of the resistor directly corresponds to the amount of output capacitance required. All T2
products require a minimum value of output capacitance. For the PTH04T240F, the minimum required
capacitance is 1000
F. When using TurboTrans, capacitors with a capacitance × ESR product below 10,000 F
× m
are required. (Multiply the capacitance (in
F) 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 thru Figure 13 show the amount of output capacitance required to meet a desired transient voltage
deviation with and without TurboTrans for two capacitor types; 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 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 13 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 amperes). 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%(2.5A), 50%(5A), and 75%(7.5A) output load steps.
The chart can also be used to determine the achievable transient voltage deviation for a given amount of output
capacitance. By selecting the amount of output capacitance along the X-axis, reading up to the desired '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, consider a 5-V application requiring a 15 mV deviation during an 3A load transient. A majority of
330
F, 10 mΩ ouput capacitors will be used. Use the 5-V, Type B capacitor chart, Figure 10. Dividing 15mV by
3A gives 5mV/A transient voltage deviation per ampere of transient load step. Select 5mV/A on the Y-axis and
read across to the 'With TurboTrans'' plot. Following this point down to the X-axis gives a minimum required
output capacitance of approximately 1900
F. The required R
TT resistor value for 1900F can then be calculated
Copyright 2008–2009, Texas Instruments Incorporated
15
Product Folder Link(s): PTH04T240F
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| PTH04T240FAS | 功能描述:DC/DC转换器 10A,2.2V-5.5V Inp Pwr Mod 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: |
| PTH04T240FAST | 功能描述:DC/DC转换器 10A,2.2V-5.5V Inp Pwr Mod 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: |
| PTH04T240FAZ | 功能描述:DC/DC转换器 10A,2.2V-5.5V Inp Pwr Mod 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: |
| PTH04T240FAZT | 功能描述:DC/DC转换器 10A,2.2V-5.5V Inp Pwr Mod 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: |
| PTH04T240W | 制造商:TI 制造商全称:Texas Instruments 功能描述:10-A, 2.2-V to 5.5-V INPUT, NON-ISOLATED, WIDE-OUTPUT, ADJUSTABLE POWER MODULE WITH TURBOTRANS⑩ |
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