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參數(shù)資料
| 型號： | UWR-3.3/8-D48A |
| 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)： | 7/10頁 |
| 文件大小： | 472K |
| 代理商： | UWR-3.3/8-D48A |
A Series
26-40W , SINGLE OUTPUT DC/DC CONVER TERS
Trimming Output Voltage
UWR 26-40W converters have a trim capability (pin 8) that allows users to
adjust the output voltages ±5%. Adjustments to the output voltages can be
accomplished via a trim pot (Figure 5) or a single xed resistor as shown in
Figures 6 and 7. A single xed resistor can increase or decrease the output
voltage depending on its connection. Resistors should be located close to
the converter and have TCR's less than 100ppm/°C to minimize sensitivity
to changes in temperature. If the trim function is not used, leave the trim
pin oating.
A single resistor connected from the Trim (pin 8) to the +Output (pin 6), will
decrease the output voltage. A resistor connected from the Trim (pin 8) to the
–Output (pin 7) , –Sense where applicable, will increase the output voltage.
Trim adjustments greater than the specied ±5% can have an adverse
affect on the converter’s performance and are not recommended. Excessive
trim adjustment of the output voltage can cause the overvoltage protection
circuitry to activate (see Performance Specications for overvoltage limits).
Power derating is based on maximum output current and voltage at the
converter's output pins. Use of trim can cause output voltages to increase
thereby increasing output power beyond the UWR's specied rating or cause
output voltages to climb into the output overvoltage region. Therefore:
(VOUT at pins) x (IOUT) <= rated output power
LOAD
+OUTPUT
–INPUT
+INPUT
ON/OFF
CONTROL
TRIM
–OUTPUT
7
2
1
8
6
4
20k
5-22
TURNS
LOAD
RTRIM DOWN
+OUTPUT
–INPUT
+INPUT
ON/OFF
CONTROL
TRIM
–OUTPUT
7
2
1
8
6
4
LOAD
RTRIM UP
+OUTPUT
–INPUT
+INPUT
ON/OFF
CONTROL
TRIM
+SENSE
–OUTPUT
–SENSE
7
2
1
8
6
4
Figure 5. Trim Connections Using A Trimpot
Figure 6. Trim Connections To Decrease Output Voltages Using Fixed Resistors
Figure 7. Trim Connections To Increase Output Voltages Using Fixed Resistors
Note: Resistor values are in k
. Accuracy of adjustment is subject
to the tolerances of resistors and factory-adjusted output accuracy.
VO = desired output voltage.
Trim Equations For 3.3 Volt Models
6
UP
VO – 3.3
RT (k
) =
–13
3.06
DOWN
3.3 – VO
RT
(k
) =
–13
2.49(VO – 1.23)
UP
VO – 5
RT (k
) =
–16.9
6.25
DOWN
5 – VO
RT
(k
) =
–16.9
2.49(VO – 2.51)
Trim Equations For 5 Volt Models
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| UWR-5.2/1500-D5A | 功能描述:DC/DC轉(zhuǎn)換器 8W 5V to 5.2V 1500mA 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: |
| UWR-5.2/1500-D5A-C | 功能描述:DC/DC轉(zhuǎn)換器 8W 5V to 5.2V 1500mA 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: |
| UWR-5.2/3000-D5A | 制造商:Murata Power Solutions 功能描述:Module DC-DC 1-OUT 5.2V 3A 20W |
| UWR-5.2/3000-D5A-C | 功能描述:DC/DC轉(zhuǎn)換器 16W 5Vto5.2V 3000mA 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: |
| UWR-5/1000-D24 | 功能描述:DC/DC轉(zhuǎn)換器 5W 24V to 5V 1000mA 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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