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参数资料
| 型号： | LSN2-T/30-D12G-C |
| 厂商： | MURATA POWER SOLUTIONS INC |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT 150 W DC-DC REG PWR SUPPLY MODULE |
| 封装： | ROHS COMPLIANT, SIP-14 |
| 文件页数： | 14/16页 |
| 文件大小： | 452K |
| 代理商： | LSN2-T/30-D12G-C |
LSN2-T/30-D12 Series
DOSA-SIP, 30A POL DC/DC Converters
www.murata-ps.com
email: sales@murata-ps.com
25 Jun 2010
MDC_LSN2-T/30-D12 Series.B20Δ Page 7 of 16
Power-up Sequencing
If a controlled start-up of one or more LSN2-T/30-D12 Series DC/DC converters
is required, or if several output voltages need to be powered-up in a given
sequence, the On/Off control pin can be driven with an external device as per
Figure 4.
Output Overvoltage Protection
LSN2-T/30-D12 SIP Series DC/DC converters do not incorporate output
overvoltage protection. In the extremely rare situation in which the device’s
feedback loop is broken, the output voltage may run to excessively high levels
(VOUT = VIN). If it is absolutely imperative that you protect your load against
any and all possible overvoltage situations, voltage limiting circuitry must be
provided external to the power converter.
Output Reverse Conduction
Many DC/DCs 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.
LSN2-T/30-D12 SIP DC/DC converters do not suffer from Output Reverse
Conduction. They employ proprietary gate drive circuitry that makes them
immune to moderate applied output overvoltages.
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 LSN2-T/30-D12 SIPs 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.
The highest temperatures in LSN2-T/30-D12 SIPs 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, LSN2-T/30-D12 SIPs maintain virtually constant
efciency from half to full load, and consequently deliver very impressive
temperature performance even if operating at full load.
Lastly, when LSN2-T/30-D12 SIPs are installed in system boards, they are
obviously 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 Overcurrent Detection
Overloading the power converter’s output for an extended time will invariably
cause internal component temperatures to exceed their maximum ratings
and eventually lead to component failure. High-current-carrying components
such as inductors, FET’s and diodes are at the highest risk. LSN2-T/30-D12
SIP Series DC/DC converters incorporate an output overcurrent detection and
shutdown function that serves to protect both the power converter and its load.
If the output current exceeds it maximum rating by typically 50% or if the
output voltage drops to less than 98% of it original value, the LSN2-T/30-D12’s
internal overcurrent-detection circuitry immediately turns off the converter,
which then goes into a “hiccup” mode. While hiccupping, the converter will
continuously attempt to restart itself, go into overcurrent, and then shut down.
Once the output short is removed, the converter will automatically restart itself.
+INPUT
PWM
Enable
4.75KΩ
1KΩ
10KΩ
COMMON
ON/OFF
Figure 4. On/Off Control Using An External Driver
(Typical circuit)
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LSN2-T30-D12G-C | 制造商:MURATA 制造商全称:Murata Manufacturing Co., Ltd. 功能描述:DOSA-SIP, 30A POL DC/DC Converters |
| LSN-3.3/10-D12 | 功能描述:DC/DC转换器 33W 12V to 3.3V 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: |
| LSN-3.3/10-D12B | 功能描述:DC/DC转换器 33W 12V to 3.3V 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: |
| LSN-3.3/10-D12B-C | 功能描述:DC/DC转换器 33W 12V to 3.3V 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: |
| LSN-3.3/10-D12BH | 功能描述:DC/DC转换器 33W 12V to 3.3V 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: |
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