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APC08K03-J 参数 Datasheet PDF下载

APC08K03-J图片预览
型号: APC08K03-J
PDF下载: 下载PDF文件 查看货源
内容描述: 非隔离式DC / DC电源模块 [Non-Isolated DC/DC Power Module]
分类和应用: 电源电路
文件页数/大小: 23 页 / 2655 K
品牌: ASTEC [ Astec America, Inc ]
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Technical Reference Note (APC08)  
Typical Application Circuit (Standard Pinout)  
Recommended C1 is a low ESR (<100 mohms) 100 µF tantalum and C2 is a 1 µF ceramic or equivalent. Recommended  
output decoupling capacitor C3 for –W models is 22 µF low ESR ceramic capacitor (at a min). For all other models, C3 can go  
as low as 1 µF ceramic capacitor.  
Figure 2. Typical Application Circuit.  
Enable Pin (Standard configuration)  
Pin P5 is functioned to enable the output voltage of a  
module. If this pin is left open or connected to > 4.1Vdc  
up to 14Vdc, the module is turned on. On the other hand,  
if this pin is connected to ground or to a voltage potential  
from 0 to 0.8Vdc, the module is turned off. The enable pin  
can source current up to 60mA max - suited for typical  
open-collector transistors readily available in the market.  
For TTL compatibility, Figure 3 shows a 7405 open  
collector inverter IC utilized to function the Enable  
feature. Other common chips that can do the function are  
74S05; 74HCT05; non-inverting - 7407; 74S07; 74HC07.  
If SMT packaging is preferred, Fairchild's Tiny Logic  
NC7SZ05 or TI's Little Logic SN7SLVC1G06 comes in SOT23  
or SC70 packages.  
Figure 3. Output Voltage Enable function diagram.  
Special Feature Pins (Options):  
Trim Function (-9):  
Pin P4 is used for output voltage adjustment. The output voltage can be trimmed through an external resistor or through an  
external DC supply as described in the succeeding sections.  
Method 1: External Trim Resistor.  
By connecting an external resistor across P4 and P3 (Gnd), the voltage appearing on pin P2 (Vo) is adjusted to a higher value.  
The output voltage of a module can be adjusted up to a maximum value of 3.3V (nominal) or 83% of the input voltage,  
MODEL: APC08 SERIES  
SHEET 8 OF 23  
OCTOBER 4, 2004 - REVISION 03