- 您現(xiàn)在的位置：買(mǎi)賣(mài)IC網(wǎng) > PDF目錄358526 > UNS-3.3/3-D5 1-OUTPUT 15 W DC-DC REG PWR SUPPLY MODULE PDF資料下載
參數(shù)資料
| 型號(hào)： | UNS-3.3/3-D5 |
| 元件分類(lèi)： | 電源模塊 |
| 英文描述： | 1-OUTPUT 15 W DC-DC REG PWR SUPPLY MODULE |
| 封裝： | 2 X 0.800 INCH, 0.400 INCH HEIGHT, PACKAGE-10 |
| 文件頁(yè)數(shù)： | 4/5頁(yè) |
| 文件大?。?/td> | 107K |
| 代理商： | UNS-3.3/3-D5 |
UNS Series
N O N - I S O L AT E D , 1 0 a n d 1 5 W , S I N G L E O U T P U T D C / D C C O N V E R T E R S
5V Model Trim Values
Note that if you have not installed trim resistors to existing circuits, there is
no change from older models. Also, if you have installed a trim pot (instead of
a fixed external trim resistor), you may only need to recalibrate the trim pot.
The trim pot value normally does not need to change. If you do not install trim
resistors, leave Trim pin 6 unconnected (open).
On the trim circuit diagram, Figure 2, use the following revised table:
UNS-5/3
older models “A” models
UNS-5/3
UNS-3.3/3
Output Voltage Adj. Range
2.7 to 3.3V
3.0 to 5.0V
3.0 to 5.0V
R1 value
68.68k
38k
10k
124.7k
39k
10k
106k
20k
0
(short)
R2 value
R3 value
Voltage Reference, V
REF
1.195 Volts
1.195 Volts
0.8 Volts
5V Model Trim Equation
R
TRIM
= (R1 x R2 (V
OUT
– V
REF
)) / (R1 x V
REF
– R2 (V
OUT
– V
REF
)) – R3
(R3 = 0
for 5V “A” models)
Finally, please note that the trailing “A” suffix in the 5V model number is not
required for ordering these converters. Use the standard model numbers
without the “A” suffix.
UNS 5 Volt Series Specification Revision Notice
In late 2003, all UNS series 5 Volt output DC/DC converters improved
some specifications and changed the trim values. The new converters are
designated with a trailing letter “A” in the model number (Example: UNS-
5/3-D12DA) marked on the unit. This designation is not used in the ordering
model number—t only appears on the device itself. These changes were un-
avoidable because of obsolescence of the PWM controller. Older 5V models
are no longer available. There is no change to 3.3 Volt output models.
All specifications are unchanged except the following:
Specification
Line Regulation
Load Regulation
Internal Reference Voltage, V
REF
Overcurrent protection
5 Volt Suffix “A” models
±0.2% typ., ±1.0% max.
±0.2% typ., ±1.5% max.
0.8 Volts
Foldback current limiting
Output Trimming
5V devices can be trimmed down to 3.0V and 3.3V devices can be trimmed
down to 2.7V using a single external trimpot or fixed resistor. The trimpot
should be connected between +V
OUT
(pins 9 and 10) and Trim (pin 6) as
shown in the figure below. The trimpot can be used to determine the value of
a single fixed resistor which can then be connected between pins 9 and 10
and 6. Fixed resistors should be metal-film types with relatively low absolute
TCR’s to ensure stability.
In order to maximize their efficiency, UNS devices employ high-value resis-
tors in their voltage feedback loop. Consequently, the external trimpots must
also be high-resistance devices (1-2 megohms). If the trimpots are acciden-
tally turned to their 0
stops, it will not damage the converters; however, the
output voltage will be pulled down to an unstable level. Use care not to trim
the output voltage below the levels indicated in the accompanying table.
OUTPUT
RETURN
+OUTPUT
R
LOAD
TRIM
ERROR
AMP
1.195V
R1
R3
R2
R
TRIM
6
7, 8
9, 10
Figure 2. Output Voltage Trimming
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| UP0.4C-100-R | 1 ELEMENT, 10 uH, FERRITE-CORE, GENERAL PURPOSE INDUCTOR, SMD |
| UP0.4C-220-R | 1 ELEMENT, 22 uH, FERRITE-CORE, GENERAL PURPOSE INDUCTOR, SMD |
| UP1B-680-R | 1 ELEMENT, 68 uH, FERRITE-CORE, GENERAL PURPOSE INDUCTOR, SMD |
| UP3B-150-R | 1 ELEMENT, 15 uH, FERRITE-CORE, GENERAL PURPOSE INDUCTOR, SMD |
| UP3B-1R0-R | 1 ELEMENT, 1 uH, FERRITE-CORE, GENERAL PURPOSE INDUCTOR, SMD |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UNS4-T220 | 制造商:WILLOW 制造商全稱(chēng):Willow Technologies Ltd 功能描述:Highest Stability Near Temperature Independent |
| UNS-5/3-D12 | 功能描述:DC/DC轉(zhuǎn)換器 12Vin 5Vout 3A 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(chēng)）: 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: |
| UNS-5/3-D12D | 功能描述:DC/DC轉(zhuǎn)換器 12Vin 5Vout 3A DIP package 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(chēng)）: 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: |
| UNV | 制造商:HONEYWELL-ACC 制造商全稱(chēng):Honeywell Accelerometers 功能描述:TruStability?? Board Mount Pressure Sensors: NSC Seriesa??Uncompensated/Unamplified |
| UNV300/B | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Converter |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。