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參數(shù)資料
| 型號： | ULQ-1.2/25-D24PL1-C |
| 廠商： | MURATA POWER SOLUTIONS INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
| 封裝： | ROHS COMPLIANT, QUARTER BRICK PACKAGE-8 |
| 文件頁數(shù)： | 15/16頁 |
| 文件大?。?/td> | 391K |
| 代理商： | ULQ-1.2/25-D24PL1-C |
On/Off Control ("P" or "N" sufx)
The input-side, remote On/Off Control function (pin 2) can be ordered to
operate with either polarity:
"P" sufx: Standard models are equipped with Positive-polarity and these
devices are enabled when pin 2 is left open (or is pulled high, applying +3.5V
to +13 with respect to –Input, pin 1) as per Figure 8. Positive-polarity devices
are disabled when pin 2 is pulled low (0 to 0.8V with respect to –Input).
"N" sufx: Optional Negative-polarity devices are off when pin 2 is left open
(or pulled high, applying +3.5V to +13V), and on when pin 2 is pulled low (0 to
0.8V) with respect to –Input as shown in Figure 9.
2
1
3
+INPUT
+VCC
–INPUT
ON/OFF
CONTROL
2
1
3
+INPUT
13V CIRCUIT
5V CIRCUIT
–INPUT
ON/OFF
CONTROL
Figure 8. Driving the Positive Polarity On/Off Control Pin
Figure 9. Driving the Negative Polarity On/Off Control Pin
Surface-Mount Package ("M" sufx)
DATEL's ULQ series SMT DC/DC converters are the only higher-power (to
66W) DC/DC's that can be automatically "pick-and-placed" using standard
vacuum-pickup equipment and subsequently reowed using high-tempera-
ture, lead-free solder.
Virtually all SMT DC/DC's today are unprotected "open-frame" devices
assembled by their vendors with high-temperature solder (usually
Sn96.5/Ag3.5 with a melting point +221°C) so that you may attach them
to your board using low-temperature solder (usually Sn63/Pb37 with a melt-
ing point of +183°C). Conceptually straightforward, this "stepped" solder
approach has its limitations . . . and is clearly out of step with an industry
trending toward the broad use of lead-free solders. No need to experiment
and develop reow proles that ensure the components on their DC/DC never
exceed 215-216°C. If those components get too hot, "double-reow" could
compromise the reliability of their solder joints. Virtually all these devices
demand you "cool down" the Sn63 prole you are likely using today.
Dynamic control of the remote on/off function is best accomplished with
a mechanical relay or an open-collector/open-drain drive circuit (optically iso-
lated if appropriate). The drive circuit should be able to sink appropriate cur-
rent (see Performance Specications) when activated and withstand appro-
priate voltage when deactivated. Applying an external voltage to pin 2 when
no input power is applied to the converter can cause permanent damage
to the converter.
Figure 10. ULQ SMT DC/DC
With Disposable Heat Shield
Figure 11. Recommended Solder Prole
(When The Heat-shield Temperature Exceeds +250°C, The Air Within Is 50°C Cooler)
DATEL is not exempted from the Laws of Physics. And we do not have
magic solders no one else has. Nevertheless, we have a simple and practical,
straightforward approach that works. We assemble our SMT DC/DC's on a
hightemperature, plastic lead-frame (nylon 46, UL94V-0 rated) using a high-
temperature (+216°C), lead-free alloy (Sn96.2%, Ag2.5%, Cu0.8%, Sb0.5%).
The lead-frame ensures coplanarity (to within 0.004 in.) of the unit's tin-plated
(150 microinches) copper leads and also supports a removable heat shield.
The disposable heat shield, which has a cutaway exposing the package
leads, provides thermal insulation to internal components during reow and
also doubles as the vacuum pick-up location. The insulation properties of the
heat shield are so effective that temperature differentials as high as 50°C
develop inside-to-outside the shield. Oven temperature proles with peaks of
250-260°C and dwell times exceeding 2 minutes above 221°C (the melting
point of Sn96.5/Ag3.5) are easily achieved. DATEL's new-generation SMT
units are shipped in stackable, JEDEC-style plastic.
Z1
Z2
Z3
Z4
Z5
Z6
Z7
100
Seconds
Degrees
Celsius
250
200
150
100
50
200
300
400
500
600
Heat Shield
Test Board
Air Under Shield
ULQ Models
Single Output, Low-Prole, Quarter-Brick
8-25 Amp Isolated DC/DC Converters
Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000
www.murata-ps.com
MDC_ULQ-15A.B02 Page 8 of 16
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ULQ-2.5/15-D48N-C | 功能描述:DC/DC轉(zhuǎn)換器 37.5W 48Vto2.5V 15A NEGATIVE POLARITY 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: |
| ULQ-2.5/15-D48NM-C | 功能描述:DC/DC轉(zhuǎn)換器 37.5W 48Vto2.5V 15A NEG SURFACE MOUNT 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: |
| ULQ-2.5/15-D48P-C | 功能描述:DC/DC轉(zhuǎn)換器 37.5W 48Vto2.5V 15A POSITVE POLARITY 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: |
| ULQ-2.5/15-D48PM-C | 功能描述:DC/DC轉(zhuǎn)換器 37.5W 48Vto2.5V 15A POS SURFACE MOUNT 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: |
| ULQ-2.5/20-D24N-C | 功能描述:DC/DC轉(zhuǎn)換器 50W 24V to 2.5V 20A NEGATIVE POLARITY 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: |
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