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参数资料
| 型号： | LSM-0.8/10-D3 |
| 厂商： | CD TECHNOLOGIES INC |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT 8 W DC-DC REG PWR SUPPLY MODULE |
| 封装： | SMT-6 |
| 文件页数： | 9/12页 |
| 文件大小： | 619K |
| 代理商： | LSM-0.8/10-D3 |
LSM-10A D3 Series
N O N - I S O L A T E D , 8 - 2 5 W S M T D C / D C C O N V E R T E R S
6
The highest temperatures in LSM D3 SMT's occur at their output inductor,
whose heat is generated primarily by I2R losses. The derating curves were
developed using thermocouples to monitor the inductor temperature and
varying the load to keep that temperature below +110°C under the assorted
conditions of air ow and air temperature. Once the temperature exceeds
+115°C (approx.), the thermal protection will disable the converter. Automatic
restart occurs after the temperature has dropped below +110°C.
As you may deduce from the derating curves and observe in the efciency
curves on the following pages, LSM D3 SMT's are more efcient at lower
current levels. Also I2R losses in the output inductor are signicantly less at
lower current levels. Consequently, LSN-D3 SMT's deliver very impressive
temperature performance if operating at less than full load.
Lastly, when LSM D3 SMT's are installed in system boards, they are obvi-
ously subject to numerous factors and tolerances not taken into account here.
If you are attempting to extract the most current out of these units under
demanding temperature conditions, we advise you to monitor the output-
inductor temperature to ensure it remains below +110°C at all times.
Output Reverse Conduction
Many DC/DC's using synchronous rectication suffer from Output Reverse
Conduction. If those devices have a voltage applied across their output before
a voltage is applied to their input (this typically occurs when another power
supply starts before them in a power-sequenced application), they will either
fail to start or self destruct. In both cases, the cause is the "freewheeling" or
"catch" FET biasing itself on and effectively becoming a short circuit.
LSM D3 SMT DC/DC converters do not suffer from Output Reverse Conduc-
tion. They employ proprietary gate drive circuitry that makes them immune
to applied output voltages.
Thermal Considerations and Thermal Protection
The typical output-current thermal-derating curves shown below enable
designers to determine how much current they can reliably derive from each
model of the LSM D3 SMT's under known ambient-temperature and air-ow
conditions. Similarly, the curves indicate how much air ow is required to
reliably deliver a specic output current at known temperatures.
Figure 7.Trim Connections Using Fixed Resistors
Figure 6.Trim Connections Using a Trimpot
Trim Equations
Note: Resistor values are in k
. Accuracy of adjustment is subject to
tolerances of resistors and factory-adjusted, initial output accuracy.
VO = desired output voltage. VO
NOM = nominal output voltage.
Note: LSM-0.8/10-D3 is not trimmable.
UP
VO – 1
RT (k
) =
1.296
DOWN
1 – VO
RT
(k
) =
– 1
1.62(VO 0.8)
UP
VO – 1.2
RT (k
) =
1.992
DOWN
1.2 – VO
RT
(k
) =
– 2.37
2.49(VO 0.8)
UP
VO – VO NOM
RT (k
) =
1.896
DOWN
VO NOM – VO
RT
(k
) =
– 4.99
2.37(VO – 0.8)
LSM-1/10-D3
Model
LSM-1.2/10-D3
LSM-1.5/10-D3
LSM-1.8/10-D3
LSM-2/10-D3
LSM-2.5/10-D3
Trim Equations
Note:
Install either a xed
trim-up resistor
or a xed trim-down
resistor depending upon
desired output voltage.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LSM-1 | 制造商:MURATA 制造商全称:Murata Manufacturing Co., Ltd. 功能描述:Single Output, Non-Isolated, 3.3VIN, 0.8-2.5VOUT 10 Amp DC/DC’s in SMT Packages |
| LSM-1.2 | 制造商:MURATA 制造商全称:Murata Manufacturing Co., Ltd. 功能描述:Single Output, Non-Isolated, 3.3VIN, 0.8-2.5VOUT 10 Amp DC/DC’s in SMT Packages |
| LSM-1.2/10-D12 | 制造商:Murata Power Solutions 功能描述:DC/DC SM 10A 10-14V IN,1.2V OUT, NON-ISO - Tape and Reel 制造商:Murata Power Solutions 功能描述:Module DC-DC 1-OUT 1.2V 10A 6-Pin SMT |
| LSM-1.2/10-D12-C | 功能描述:DC/DC转换器 12W 12V to 1.2V 10A RoHS:否 制造商:Murata 产品: 输出功率: 输入电压范围:3.6 V to 5.5 V 输入电压（标称）: 输出端数量:1 输出电压（通道 1）:3.3 V 输出电流（通道 1）:600 mA 输出电压（通道 2）: 输出电流（通道 2）: 安装风格:SMD/SMT 封装 / 箱体尺寸: |
| LSM-1.2/10-D12EB | 制造商:MURATA 制造商全称:Murata Manufacturing Co., Ltd. 功能描述:10 Amp DC/DC Power Converter Evaluation Boards |
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