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參數(shù)資料
| 型號(hào)： | LSM2-T/6-W3-C |
| 廠商： | CD TECHNOLOGIES INC |
| 元件分類(lèi)： | 電源模塊 |
| 英文描述： | 1-OUTPUT 19.8 W DC-DC REG PWR SUPPLY MODULE |
| 封裝： | ROHS COMPLIANT PACKAGE-7 |
| 文件頁(yè)數(shù)： | 16/17頁(yè) |
| 文件大?。?/td> | 1504K |
| 代理商： | LSM2-T/6-W3-C |
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MDC_LSM2 Series.B01 Page 8 of 17
Technical enquiries email: sales@murata-ps.com, tel: +1 508 339 3000
www.murata-ps.com
LSM2 Series
Single Putput, Non-Isolated
Selectable-Output POL DC/DC Converters
Don’t Use Pre-Biasing and Sequencing Together
Normally, you would use startup sequencing on multiple DC/DC’s to solve the
Pre-Bias problem. By causing all power sources to ramp up together, no one
source can dominate and force the others to fail to start. For most applica-
tions, do not use startup sequencing in a Pre-Bias application, especially with
an external active power source. If you have active source pre-biasing, leave
the Sequence input open so that the output will step up quickly and safely. A
symptom of this condition is repeated failed starts. You can further verify this
by removing the existing load and testing it with a separate passive resistive
load which does not exceed full current. If the resistive load starts successfully,
you may be trying to drive an external pre-biased active source.
It may also be possible to use pre-bias and sequencing together if the Pre-
Bias source is in fact only a small external bypass capacitor slowly charged by
leakage currents. Test your application to be sure.
Output Adjustments
The LSM2 series includes a special output voltage trimming feature which
is fully compatible with competitive units. The output voltage may be varied
using a single trim resistor from the Trim input to Power Common (pin 4) or an
external DC trim voltage applied between the Trim input and Power Common.
The output voltage range for W3 models is 0.75 to 3.3 Volts. For D12 models,
the output range is 0.75 to 5 Volts.
IMPORTANT: On W3 models only, for outputs greater than 3 Volts up to
3.3 Volts maximum, the input supply must be 4.5 Volts minimum. To retain
proper regulation, do not exceed the 3.3V output.
As with other trim adjustments, be sure to use a precision low-tempco
resistor (±100 ppm/°C) mounted close to the converter with short leads. Also
be aware that the output voltage accuracy is ±2% (typical) therefore you may
need to vary this resistance slightly to achieve your desired output setting.
Two different trim equations are used for the W3 and D12 models.
W3 Models Resistor Trim Equation:
The W3 models fixed trim resistors to set the output voltage are:
Vout (Typ.)
0.7525V
1.0V
1.2V
1.5V
1.8V
2.5V
3.3V
Rtrim (kW)
Open
80.021
41.973
23.077
15.004
6.947
3.16
D12 Models Resistor Trim Equation:
Vout (Typ.)
0.7525V
1.0V
1.2V
1.5V
1.8V
2.5V
3.3V
5V
Rtrim (kW)
Open
41.424 22.46
13.05
9.024
5.009
3.122 1.472
Voltage Trim
The LSM2 Series may also be trimmed using an external voltage applied
between the Trim input and Output Common. Be aware that the internal “l(fā)oad”
impedance looking into trim pin is approximately 5 Kilohms. Therefore, you
may have to compensate for this in the source resistance of your external volt-
age reference.
Use a low noise DC reference and short leads. Mount the leads close to the
converter. Consider using a small bypass capacitor (0.1F ceramic) between
trim and output common to avoid instability.
Two different trim equations are used for the W3 and D12 models.
W3 Models Voltage Trim Equation:
VTRIM (in Volts) = 0.7 – (0.1698 x (VO – 0.7525))
The LSM2 W3 fixed trim voltages to set the output voltage are:
Vout (Typ.) 0.7525V
1.0V
1.2V
1.5V
1.8V
2.5V
3.3V
Vtrim
Open
0.6928V 0.624V 0.5731V 0.5221V 0.4033V 0.267V
D12 Models Voltage Trim Equation:
VTRIM (in Volts) = 0.7 – (0.0667 x (VO – 0.7525))
The LSM2 D12 fixed trim voltages to set the output voltage are:
Vout (Typ.) 0.7525V
1.0V
1.2V
1.5V
1.8V
2.5V
3.3V
5V
Vtrim
Open
0.6835 0.670
0.650
0.630
0.583
0.530 0.4166
RTRIM (W) = _____________ – 5110
VO – 0.7525
21070
RTRIM (W) = _____________ –1000
VO – 0.7525
10500
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LSM2U | 功能描述:限位開(kāi)關(guān) LIMIT SWITCH RoHS:否 制造商:Honeywell 觸點(diǎn)形式:SPDT 執(zhí)行器:Non-Contact 電流額定值:30 mA 電壓額定值 AC: 電壓額定值 DC:3.6 V 工作力:10 g IP 等級(jí):IP 67 NEMA 額定值:1, 4, 12, 13 端接類(lèi)型:4-Pin M12 Connector 安裝:SMD/SMT |
| LSM-3.3/10-D12 | 功能描述:DC/DC轉(zhuǎn)換器 33W 12V to 3.3V 10A SMT 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: |
| LSM-3.3/10-D12-C | 功能描述:DC/DC轉(zhuǎn)換器 33W 12V to 3.3V 10A 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: |
| LSM-3.3/10-D12EB | 制造商:MURATA 制造商全稱(chēng):Murata Manufacturing Co., Ltd. 功能描述:10 Amp DC/DC Power Converter Evaluation Boards |
| LSM-3.3/10-D5 | 功能描述:DC/DC轉(zhuǎn)換器 33W 5V to 3.3V 10A SMT 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: |
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