參數(shù)資料
型號(hào)： PTH08T241WAZT
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 PACKAGE-11
文件頁(yè)數(shù)： 20/39頁(yè)
文件大小： 1366K
代理商： PTH08T241WAZT
Smart Sync Considerations
0.7
1.3
2.1
2.5
1.7
2.3
1.9
1.5
0.9
1.1
5
6
8
9
11
12
14
15
13
10
7
V
I
–
In
p
u
t
V
o
lt
a
g
e
–
V
O – Output Voltage – V
Meets V
O Ripple
Specification
Increased V
O Ripple
f
SW = 300 kHz
0.7
1.3
2.1
2.5
1.7
2.3
1.9
1.5
0.9
1.1
5
6
8
9
11
12
14
15
13
10
7
V
I
–
In
p
u
t
V
o
lt
a
g
e
–
V
O – Output Voltage – V
f
SW = 400 kHz
f
SW = 350 kHz
f
SW = 300 kHz
f
SW = 240 kHz
Auto-Track Function
How Auto-Track Works
www.ti.com ................................................................................................................................................... SLTS264J – NOVEMBER 2005 – REVISED JUNE 2009
Operating the PTH08T240W with a low duty cycle may increase the output voltage ripple due to pulse skipping
of the PWM controller. When operating at the nominal switching frequency, input voltages greater than (VO × 11)
may cause the output voltage ripple to increase (typically 2×).
Synchronizing to a higher frequency and operating with a low duty cycle may impact output voltage ripple. When
operating at 300 kHz, Figure 26 shows the operating region where the output voltage ripple meets the electrical
specifications and the operating region where the output voltage ripple may increase. Figure 27 shows the
operating regions for several switching frequencies. For example, a module operating at 400 kHz and an output
voltage of 1.2 V, the maximum input voltage that meets the output voltage ripple specification is 10 V. Exceeding
10 V may cause in an increase in output voltage ripple. As shown in Figure 27, operating below 6V allows
operation down to the minimum output voltage over the entire synchronization frequency range without affecting
the output voltage ripple. See the Electrical Characteristics table for the synchronization frequency range limits.
Figure 26. VO Ripple Regions at 300 kHz
(1) (2)
Figure 27. VO Ripple Regions
(1) (2)
(1)
Operation above a given curve may cause the output voltage ripple to increase (typically 2×).
(2)
When operating at the nominal switching frequency refer to the 300 kHz plot.
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 ICs 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 2.5-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 2.5 V.
When under Auto-Track control, the regulated output from the module follows the voltage at its Track pin on a
Copyright 2005–2009, Texas Instruments Incorporated
27
Product Folder Link(s): PTH08T240W PTH08T241W
相關(guān)PDF資料
PDF描述
PTH08T240WAD 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
PTH08T241WAZ 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
PTH08T241WAST 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
PTH08T240WAZ 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
PTH08T240WAH 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PTH08T250W 制造商:TI 制造商全稱:Texas Instruments 功能描述:50-A, 4.5-V to 14-V INPUT, NON-ISOLATED, WIDE-OUTPUT, ADJUSTABLE POWER MODULE WITH TurboTrans⑩
PTH08T250WAD 功能描述:DC/DC轉(zhuǎn)換器 50A 4.5V to 14V Inp Non-Isolated 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:
PTH08T250WAS 功能描述:DC/DC轉(zhuǎn)換器 50A 4.5V to 14V Inp Non-Isolated 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:
PTH08T250WAST 功能描述:DC/DC轉(zhuǎn)換器 50A 4.5V to 14V Inp Non-Isolated 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:
PTH08T250WAZ 功能描述:DC/DC轉(zhuǎn)換器 50A 4.5V to 14V Inp Non-Isolated 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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