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| 型號(hào)： | PTH08T250WAST |
| 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(yè)數(shù)： | 21/39頁(yè) |
| 文件大?。?/td> | 2220K |
| 代理商： | PTH08T250WAST |
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SLTS278G – NOVEMBER 2010 – REVISED MARCH 2009
www.ti.com
Table 7. Required Connections for Current Sharing(1)
TERMINAL
MASTER
SLAVE
NAME
NO.
VI
6,7,14,15
Connect to the Input Bus.
VO
10,11
Connect to the Output Bus.
GND
8,9,12,13
Connect to Common Power GND.
Inhibit and
Use for Inhibit control & UVLO adjustments. If
21
No Connection. Leave open-circuit.
UVLO
unused leave open-circuit.
Use to set the output voltage. Connect RSET
Vo Adjust
18
No Connection. Leave open-circuit.
resistor between this pin and AGND (pin 4).
Connect to the output voltage either at the load or
+Sense
17
No Connection. Leave open-circuit.
at the module (pin 11).
Connect to the output GND either at the load or at
–Sense
16
No Connection. Leave open-circuit.
the module (pin 13).
Track
20
Connect to Track control or to VI (pin 15).
No Connection. Leave open-circuit.
Connect TurboTrans resistor, RTT, between this pin
TurboTrans
19
No Connection. Leave open-circuit.
and +Sense (pin 17).
Connect to an external clock. If unused connect to
SmartSync
22
Connect to Common Power GND.
GND.
CONFIG
1
Connect to GND. (2)
Connect to the Input Bus.
Share
2
Connect to pin 2 of Slave. (2)
Connect to pin 2 of Master.
Comp
3
Connect to pin 3 of Slave. (2)
Connect to pin 3 of Master.
AGND
4
Connect to pin 4 of Slave. (3)
Connect to pin 4 of Master.
CLKIO
5
Connect to pin 5 of Slave. (2)
Connect to pin 5 of Master.
(1)
For more details on the pin descriptions, please refer to the 'Terminal Functions' described in
(2)
See Layer A in Figure 33 for recommended layout
(3)
See Layer B in Figure 33 for recommended layout
Current Sharing and TurboTrans
When using TurboTrans while paralleling two modules, the TurboTrans resistor, RTT, must be connected from the
TurboTrans pin (pin 19) of the Master module to the +Sense pin (pin 17) of the Master module. When paralleling
modules the procedure to calculate the proper value of output capacitance and RTT is similar to that explained in
the TurboTrans Selection section, however the values must be calculated for a single module. Therefore, the
total output current load step must be halved before determining the required output capacitance and the RTT
value as explained in the TurboTrans Selection section. The value of output capacitance calculated is the
minimum required output capacitance per module and the value of RTT must be calculated using this value of
output capacitance. The TurboTrans pin of the Slave module must be left open.
As an example, let's look at a 12-V application requiring a 60 mV deviation during an 30 A load transient. A
majority of 470 mF, 10 m output capacitors are used. Use the 12 V, Type B capacitor chart, Figure 12. First,
halving the load transient gives 15 A. Dividing 60 mV by 15 A gives 4 mV/A transient voltage deviation per amp
of transient load step. Select 4 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 1500 mF. This is the
minimum required output capacitance per module. Hence, the total minimum output capacitance would be
2x1500 mF = 3000 mF. The required RTT resistor value for 1500 mF can then be calculated or selected from
Current Sharing Thermal Derating Curves
The temperature derating curves in Figure 29 through Figure 32 represent the conditions at which internal
components are at or below the manufacturer's maximum operating temperatures. Derating limits apply to two
PTH08T250W modules soldered directly to a 100 mm x 200 mm double-sided PCB with 2 oz. copper and the
direction of airflow from pins 10 to pins 22. For surface mount packages (AS and AZ suffix), multiple vias must
be utilized. Please refer to the mechanical specification for more information.
28
Copyright 2010–2009, Texas Instruments Incorporated
Product Folder Link(s): PTH08T250W
相關(guān)PDF資料 |
PDF描述 |
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| PTH08T250WAD | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| PTH08T250WAS | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| PTH08T250WAZ | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| PTH08T255WAS | DC-DC REG PWR SUPPLY MODULE |
| PTH08T255WAZ | DC-DC REG PWR SUPPLY MODULE |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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: |
| PTH08T250WAZT | 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: |
| PTH08T250WBD | 制造商:Texas Instruments 功能描述: |
| PTH08T255WAD | 功能描述:DC/DC轉(zhuǎn)換器 40A,8-14V In,3-5.25V Out,Non-Iso Pwr Mod 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: |
| PTH08T255WAS | 功能描述:DC/DC轉(zhuǎn)換器 40A,8-14V In,3-5.25V Out,Non-Iso Pwr Mod 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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