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參數(shù)資料
| 型號： | PTH08T240FAS |
| 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 |
| 文件頁數(shù)： | 20/39頁 |
| 文件大?。?/td> | 1345K |
| 代理商： | PTH08T240FAS |
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Auto-Track Function
How Auto-Track Works
www.ti.com ............................................................................................................................................... SLTS277D – DECEMBER 2006 – REVISED MARCH 2009
To achieve the output voltage ripple specified in the electrical characteristics table, the maximum input voltage
for a given output voltage is limited. The input voltage to output voltage ratio limit is 11 to 1 for the PTH08T240F.
However, when using SmartSync, the maximum allowable input voltage varies as a function of output voltage
and switching frequency. Operationally, the maximum input voltage is inversely proportional to switching
frequency. Synchronizing to a higher frequency causes greater restrictions on the input voltage range. For a
given switching frequency, Figure 30 shows how the recommended maximum input voltage varies with output
voltage.
For example, a module operating at 375 kHz and an output voltage of 0.9 V, the maximum input voltage is 8 V.
Exceeding the maximum input voltage may cause in an increase in output ripple voltage and increased output
voltage variation.
As shown in Figure 30, input voltages below 6 V can operate down to the minimum output voltage over the entire
synchronization frequency range. See the Electrical Characteristics table for the synchronization frequency range
and pulse limits.
RECOMMENDED INPUT VOLTAGE
vs
OUTPUT VOLTAGE
Figure 30.
The Auto-Track function is unique to the PTH/PTV family, and is available with all POLA products. Auto-Track
was designed to simplify the amount of circuitry required to make the output voltage from each module power up
and power down in sequence. The sequencing of two or more supply voltages during power up is a common
requirement for complex mixed-signal applications that use dual-voltage VLSI devices such as the TMS320
DSP family, microprocessors, and ASICs.
Auto-Track works by forcing the module output voltage to follow a voltage presented at the Track control pin (1).
This control range is limited to between 0 V and the module set-point voltage. Once the track-pin voltage is
raised above the set-point voltage, the module output remains at its set-point (2). As an example, if the Track pin
of a 1.5-V regulator is at 1 V, the regulated output is 1 V. If the voltage at the Track pin rises to 3 V, the regulated
output does not go higher than 1.5 V.
Copyright 2006–2009, Texas Instruments Incorporated
27
Product Folder Link(s): PTH08T240F
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PTH08T240FAST | 功能描述:DC/DC轉(zhuǎn)換器 10-A 4.5-14V Input 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: |
| PTH08T240FAZ | 功能描述:DC/DC轉(zhuǎn)換器 10-A 4.5-14V Input 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: |
| PTH08T240FAZT | 功能描述:DC/DC轉(zhuǎn)換器 10-A 4.5-14V Input 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: |
| PTH08T240W | 制造商:TI 制造商全稱:Texas Instruments 功能描述:10-A, 4.5-V to 14-V INPUT, NON-ISOLATED, WIDE-OUTPUT, ADJUSTABLE POWER MODULE WITH TURBOTRANS? |
| PTH08T240W_07 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:10-A, 4.5-V to 14-V INPUT, NON-ISOLATED, WIDE-OUTPUT, ADJUSTABLE POWER MODULE WITH TURBOTRANS |
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