參數(shù)資料
型號(hào)： PTH04T240WAZT
廠商： TEXAS INSTRUMENTS INC
元件分類： 電源模塊
英文描述： 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
封裝： ROHS COMPLIANT, PLASTIC, DIP-11
文件頁(yè)數(shù)： 10/38頁(yè)
文件大小： 964K
代理商： PTH04T240WAZT
TurboTrans Technology
TurboTrans Selection
SLTS276D – OCTOBER 2006 – REVISED JULY 2009 ...................................................................................................................................................... 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. 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.
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 whether or not TurboTrans is utilized. For the
PTH04T240W, the minimum required capacitance is 220
F. The minimum required capacitance for the
PTH04T241W is 300
F of ceramic type. 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 15 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 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 thru
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%(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, let's look at a 5-V application requiring a 50 mV deviation during an 5A, 50% load transient. A
majority of 330
F, 10 mΩ ouput capacitors will be used. Use the 5-V, Type B capacitor chart, Figure 12. Dividing
50mV by 5A gives 10mV/A transient voltage deviation per amp of transient load step. Select 10mV/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 760
F. The required R
TT resistor value for 760F can then be
calculated or selected from Table 5. The required RTT resistor is approximately 4.99k.
To see the benefit of TurboTrans, follow the 10mV/A marking across to the 'Without TurboTrans' plot. Following
that point down shows that you would need a minimum of 2700
F of output capacitance to meet the same
transient deviation limit. This is the benefit of TurboTrans.
18
Copyright 2006–2009, Texas Instruments Incorporated
Product Folder Link(s): PTH04T240W PTH04T241W
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PTH04T241W 制造商:TI 制造商全稱: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
PTH04T241WAD 功能描述:DC/DC轉(zhuǎn)換器 10A 2.2V-5.5Vin Adj Pwr Module RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸:
PTH04T241WAS 功能描述:DC/DC轉(zhuǎn)換器 10A 2.2V-5.5Vin Adj Pwr Module RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸:
PTH04T241WAST 功能描述:DC/DC轉(zhuǎn)換器 10A 2.2V-5.5Vin Adj Pwr Module RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸:
PTH04T241WAZ 功能描述:DC/DC轉(zhuǎn)換器 10A 2.2V-5.5Vin Adj Pwr Module RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸:
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