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參數(shù)資料
| 型號： | PT4662C |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 2-OUTPUT 25 W DC-DC REG PWR SUPPLY MODULE |
| 文件頁數(shù)： | 5/16頁 |
| 文件大?。?/td> | 321K |
| 代理商： | PT4662C |
Application Notes
For technical support and further information, visit http://power.ti.com
Adjusting the Output Voltage of the PT4660
& PT4680 Series of Dual-Output Converters
The dual output voltages from the PT4660 (48-V Bus),
and PT4680 (24-V Bus) series of DC/DC converters can
be independently adjusted by up to 10 %, higher or lower
than the factory trimmed pre-set voltage. The adjustment
method requires the addition of a single external resistor 1.
Table 3-1 gives the adjustment range of Vo1 and Vo2 for
each model in the series as Va(min) and Va(max).
Vo1 Adjust Down:
Add a resistor (R1), between pin 13
(Vo1 Adj) and pin 12 (Vo1) 2.
Vo1 Adjust Up:
To increase the output, add a resistor R2
between pin 13 (Vo1 Adj) and pin 14 (COM) 2, 4.
Vo2 Adjust Down:
Add a resistor (R3) between pin 20
(Vo2 Adj) and pin 21 (Vo2) 2.
Vo2 Adjust Up:
Add a resistor R4 between pin 20
(Vo2 Adj) and pin 19 (COM) 2, 4.
Refer to Figure 3-1 and Table 3-2 for both the placement and
value of the required resistor.
Notes:
1. Adjust resistors are not required if Vo1 and Vo2 are to
remain at their respective nominal set-point voltage.
In this case, Vo1 Adj (pin 13) and Vo2 Adj (pin 20) are
left open-circuit
2. Use only a single 1% resistor in either the (R1) or R2
location to adjust Vo1, and in the (R3) or R4 location
to adjust Vo2. Place the resistor as close to the converter
as possible.
Figure 3-1; Placement of Output Adjust Resistors
3. Vo2 must always be at least 0.3 V lower than Vo1.
4. The over-voltage protection threshold is fixed, and is set
nominally 25 % above the set-point output voltage.
Adjusting Vo1 or Vo2 higher will reduce the voltage
margin between the respective steady-state output
voltage and its over-voltage (OV) protection threshold.
This could make the module sensitive to OV fault
detection, as a result of random noise and load tran-
sients.
Note: An OV fault is a latched condition that shuts down
both outputs of the converter. The fault can only be cleared
by cycling one of the Enable control pins (EN1* / EN2), or
by momentarily removing the input power to the module.
5. Never connect capacitors to either the Vo1 Adj or
Vo2 Adj pins. Any capacitance added to these control
pins will affect the stability of the respective regulated
output.
The adjust up and adjust down resistor values can also be
calculated using the following formulas. Be sure to select
the correct formula parameter from Table 3-1 for the
output and model being adjusted.
(R1) or (R3)
=
Ro (Va – Vr )
– Rs
k
(Vo – Va)
R2 or R4
=
Ro
Vr
– Rs
k
Va – Vo
Where: Vo = Original output voltage, (Vo1 or Vo2)
Va = Adjusted output voltage
Vr = The reference voltage from Table 3-1
Ro = The resistance constant in Table 3-1
Rs = The series resistance from Table 3-1
PT4660 & PT4680 Series
PT4660
+Vin
EN 1*
EN 2
–Vin
Vo
1 adj
Vo
2 adj
Vo
1
Vo
2
COM
9–12
21–24
14–19
L
O
A
D
L
O
A
D
Vo
1
Vo
2
+V
IN
–V
IN
20
13
1
4
3
2
COM
* Inverted logic
R2
(R1)
(R3)
R4
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PT4663C | 2-OUTPUT 25 W DC-DC REG PWR SUPPLY MODULE |
| PT4662N | 2-OUTPUT 25 W DC-DC REG PWR SUPPLY MODULE |
| PT4662A | 2-OUTPUT 25 W DC-DC REG PWR SUPPLY MODULE |
| PT4663N | 2-OUTPUT 25 W DC-DC REG PWR SUPPLY MODULE |
| PT4681A | 2-OUTPUT DC-DC REG PWR SUPPLY MODULE |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PT4662N | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 3.3/2.5V 30A/2-Out 48V Inp Iso DC/DC RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| PT4663 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:20-A 24-V Input Dual Output Isolated DC/DC Converter |
| PT4663A | 功能描述:DC/DC轉(zhuǎn)換器 30A 3.3/1.8V DC/DC 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: |
| PT4663C | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 30A Dual Out 48V-Inp Isolated DC-DC RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| PT4663N | 制造商:TI 制造商全稱:Texas Instruments 功能描述:30-A Dual Output Isolated DC/DC Converter |
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