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| 型号： | LANC4805UW12 |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT 12 W DC-DC REG PWR SUPPLY MODULE |
| 封装： | ROHS COMPLIANT, DIP-24 |
| 文件页数： | 9/14页 |
| 文件大小： | 918K |
| 代理商： | LANC4805UW12 |
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LANC4805UW12
(888) 597-WALL
www.wallindustries.com
Page 4 of 14
Output Over Voltage Protection
The output over-voltage protection consists of an output Zener diode that monitors the voltage on the output
terminals. If the voltage on the output terminals exceeds the over-voltage protection threshold, then the Zener
diode clamps the output voltage.
Input Source Impedance
The power module should be connected to a low impedance input source. Highly inductive source impedance
can affect the stability of the power module. Input external L-C filter is recommended to minimize input
reflected ripple current. The inductor is simulated source impedance of 12H and capacitor is Nippon chemi-con
KZE series 47F/100V. The capacitor must as close as possible to the input terminals of the power module for
lower impedance.
DESIGN CONSIDERATIONS:
Output Over Current Protection
When excessive output currents occur in the system, circuit protection is required on all power supplies.
Normally, overload current is maintained at approximately 150% of rated current for the LANCUW12 single
output series.
Fold back-mode is a method of operation in a power supply whose purpose is to protect the power supply from
being damaged during an over-current fault condition. It also enables the power supply to operate normally when
the fault is removed.
One of the problems resulting from over current is that excessive heat may be generated in power devices;
especially MOSFET and Schottky diodes and the temperature of those devices may exceed their specified limits.
A protection mechanism has to be used to prevent those power devices from being damaged.
The operation of fold back is as follows. When the current sense circuit sees an over-current event, the output
voltage of the module will be decreased for low power dissipation and decrease the heat of the module.
Figure 2
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LANC4805UW12-S | 制造商:WALL 制造商全称:Wall Industries,Inc. 功能描述:DC/DC Converter 18-75 VDC Input 5.1 VDC Output at 2.4A |
| LANC4805UW3 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog IC |
| LANC4805UW5 | 制造商:Wall Industries 功能描述:WIDE INPUT DUAL INLINE DC/DC , 5 WATT |
| LANC4805UW8 | 制造商:WALL 制造商全称:Wall Industries,Inc. 功能描述:Single and Dual Output 8 Watt DC/DC Converter 4:1 Ultra Wide Input Voltage |
| LANC4805W | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Analog IC |
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