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參數(shù)資料
| 型號： | UQQ-3.3/25-Q48NB9-C |
| 廠商： | CD TECHNOLOGIES INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT 82.5 W DC-DC REG PWR SUPPLY MODULE |
| 封裝： | ROHS COMPLIANT PACKAGE-9 |
| 文件頁數(shù)： | 15/17頁 |
| 文件大?。?/td> | 1988K |
| 代理商： | UQQ-3.3/25-Q48NB9-C |
MDC_UQQ_A03 Page 7 of 7
UQQ Series
Wide Input Range Single Output DC/DC Converters
D C / D C C O N V E R T E R S
Technical enquiries email: sales@murata-ps.com, tel: + 508 339 3000
www.murata-ps.com
Absolute Maximum Ratings
Input Voltage
12V models
48V models
Continuous
0 to +36V
0 to +75V
Transient (00msec)
+50V
+00V
On/Off Control
0V min to +3.5V max.
Input Reverse Polarity Protection
See Fuse section
Output Overvoltage
VOUT +20% max.
Output Current (7)
Current-limited. Devices can
withstand sustained short circuit
without damage.
Storage Temperature
–55 to +25°C
Lead Temperature (soldering 0 sec. max.) +280°C
Absolute maximums are stress ratings. Exposure of devices to any of these
conditions may adversely affect long-term reliability. Proper operation under
conditions other than those listed in the Performance/Functional Specifications
Table is not implied nor recommended.
Removal of Soldered UQQ’s from Printed Circuit Boards
Should removal of the UQQ from its soldered connection be needed, thor-
oughly de-solder the pins using solder wicks or de-soldering tools. At no time
should any prying or leverage be used to remove boards that have not been
properly de-soldered first.
Input Source Impedance
UQQ converters must be driven from a low ac-impedance input source. The
DC/DC’s performance and stability can be compromised by the use of highly
inductive source impedances. The input circuit shown in Figure 2 is a practical
solution that can be used to minimize the effects of inductance in the input
traces. For optimum performance, components should be mounted close to the
DC/DC converter.
I/O Filtering, Input Ripple Current, and Output Noise
All models in the UQQ Series are tested/specified for input ripple current (also
called input reflected ripple current) and output noise using the circuits and
layout shown in Figures 2 and 3. External input capacitors (CIN in Figure 2)
serve primarily as energy-storage elements.
Figure 2. Measuring Input Ripple Current
CIN
VIN
CBUS
LBUS
CIN = 33F, ESR < 700m
@ 100kHz
CBUS = 220F, ESR < 100m
@ 100kHz
LBUS = 12H
3
1
+INPUT
–INPUT
CURRENT
PROBE
TO
OSCILLOSCOPE
+
–
Technical Notes
They should be selected for bulk capacitance (at appropriate frequencies),
low ESR, and high rms-ripple-current ratings. The switching nature of
DC/DC converters requires that dc voltage sources have low ac impedance as
highly inductive source impedance can affect system stability. In Figure 2,
CBUS and LBUS simulate a typical dc voltage bus. Your specific system con-
figuration may necessitate additional considerations.
In critical applications, output ripple/noise (also referred to as periodic
and random deviations or PARD) can be reduced below specified limits
using filtering techniques, the simplest of which is the installation of
additional external output capacitors. Output capacitors function as true
filter elements and should be selected for bulk capacitance, low ESR, and
appropriate frequency response. In Figure 3, the two copper strips simulate
real-world pcb impedances between the power supply and its load. Scope
measurements should be made using BNC connectors or the probe ground
should be less than inch and soldered directly to the fixture.
All external capacitors should have appropriate voltage ratings and be
located as close to the converter as possible. Temperature variations for all
relevant parameters should be taken into consideration. OS-CONTM organic
semiconductor capacitors (www.sanyo.com) can be especially effective for
further reduction of ripple/noise.
The most effective combination of external I/O capacitors will be a function
of line voltage and source impedance, as well as particular load and layout
conditions. Our Applications Engineers can recommend potential solutions
and discuss the possibility of our modifying a given device’s internal filtering
to meet your specific requirements. Contact our Applications Engineering
Group for additional details.
Figure 3. Measuring Output Ripple/Noise (PARD)
C1
C1 = 1F CERAMIC
C2 = 10F TANTALUM
LOAD 2-3 INCHES (51-76mm) FROM MODULE
C2
RLOAD
7
8
COPPER STRIP
4
5
COPPER STRIP
SCOPE
+OUTPUT
–OUTPUT
+SENSE
–SENSE
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UQQ-5/17-Q12NB-C | 功能描述:DC/DC轉(zhuǎn)換器 12Vin 5Vout 17A neg TH baseplate 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: |
| UQQ-5/17-Q12N-C | 功能描述:DC/DC轉(zhuǎn)換器 12Vin 5Vout 17A neg polarity TH 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: |
| UQQ-5/17-Q12PB9-C | 制造商:Murata Power Solutions 功能描述: |
| UQQ-5/17-Q12PB-C | 功能描述:DC/DC轉(zhuǎn)換器 12Vin 5Vout 17A pos TH baseplate 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: |
| UQQ-5/17-Q12PB-C | 制造商:Murata Power Solutions 功能描述:DC/DC Converter |
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