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参数资料
| 型号： | LSN2-T/30-D12-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-13 |
| 文件页数： | 2/16页 |
| 文件大小： | 452K |
| 代理商： | LSN2-T/30-D12-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 10 of 16
Figure 11. Self-Ramping Power Up
If the power up/down timing needs to be closely controlled, each POL must
be characterized for start-up and down times. These often vary—one POL may
stabilize in 15 milliseconds whereas another takes 50 mS. Another problem is
that the sequencing controller itself must be “already running” and stabilized
before starting up other circuits. If there is a glitch in the system, the power
up/down sequencer could get out of step with possible disastrous results.
Lastly, changing the timing may require reprogramming the logic sequencer or
rewriting software.
Sequence/Track Input
A different power sequencing solution is employed on the LSN2-T/30-D12 DC/DC
converter. After external input power is applied and the converter stabilizes, a
high impedance Sequence/Track input pin accepts an external analog voltage.
The output power voltage will then track this Sequence/Track input at a one-to-
one ratio up to the nominal set point voltage for that converter. This Sequenc-
ing input may be ramped, delayed, stepped or otherwise phased as needed for
the output power, all fully controlled by the user’s simple external circuits. As a
direct input to the converter’s feedback loop, response to the Sequence/Track
input is very fast (milliseconds).
By properly controlling this Sequence pin, most operations of the discrete
On/Off logic sequencer may be duplicated. The Sequence pin system does not
use the converter’s Enable On/Off control (unless it is a master emergency shut
down system).
Power Phasing Architectures
Observe the simplied timing diagrams in this section. There are many pos-
sible power phasing architectures and these are just some examples to help
you analyze your system. Each application will be different. Multiple output
voltages may require more complex timing than that shown here.
These diagrams illustrate the time and slew rate relationship between two
typical power output voltages. Generally the Master will be a primary power
voltage in the system which must be present rst or coincident with any
Slave power voltages. The Master output voltage is connected to the Slave’s
Sequence input, either by a voltage divider, divider-plus-capacitor or some
other method.
Several standard sequencing architectures are prevalent. They are con-
cerned with three factors:
■ The time relationship between the Master and Slave voltages
■ The voltage difference relationship between the Master and Slave.
■ The voltage slew rate (ramp slope) of each converter’s output.
For most systems, the time relationship is the dominant factor. The voltage
difference relationship is important for systems very concerned about possible
latchup of programmable devices or overdriving ESD diodes. Lower slew rates
avoid overcurrent shutdown during bypass cap charge-up.
Figure 12. Proportional Phasing
Figure 13. Sequence/Track Simplied Equivalent Schematic
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LSN2-T30-D12-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 |
| 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: |
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