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VJ1206Y224KXXAT

更新时间： 2024-02-09 17:39:54
品牌 Logo 应用领域
安森美 - ONSEMI 电容器PC
页数 文件大小 规格书
10页 97K
描述
Low-Cost 100 mA High-Voltage Buck and Buck-Boost Using NCP1052

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VJ1206Y224KXXAT 技术参数

是否Rohs认证： 符合生命周期：Active
Reach Compliance Code：compliant风险等级：5.82
电容：0.22 µF电容器类型：CERAMIC CAPACITOR
介电材料：CERAMIC高度：1.7 mm
JESD-609代码：e4长度：3.2 mm
多层：Yes负容差：20%
端子数量：2最高工作温度：125 °C
最低工作温度：-55 °C封装形式：SMT
包装方法：TR, 7 Inch正容差：20%
额定（直流）电压（URdc）：25 V系列：VJ NON-MAGNETIC
尺寸代码：1206温度特性代码：X7R
温度系数：-/+15ppm/Cel ppm/ °C端子面层：Silver/Palladium (Ag/Pd)
宽度：1.6 mm

VJ1206Y224KXXAT 数据手册

 浏览型号VJ1206Y224KXXAT的Datasheet PDF文件第2页浏览型号VJ1206Y224KXXAT的Datasheet PDF文件第3页浏览型号VJ1206Y224KXXAT的Datasheet PDF文件第4页浏览型号VJ1206Y224KXXAT的Datasheet PDF文件第5页浏览型号VJ1206Y224KXXAT的Datasheet PDF文件第6页浏览型号VJ1206Y224KXXAT的Datasheet PDF文件第7页 
AND8098/D  
Low−Cost 100 mA  
High−Voltage Buck and  
Buck−Boost Using NCP1052  
Prepared by: Kahou Wong  
ON Semiconductor  
http://onsemi.com  
APPLICATION NOTE  
INTRODUCTION  
PRINCIPLE OF OPERATION  
This application note presents low-cost high-voltage  
Figure 1 shows the proposed buck and buck-boost  
100 mA non-isolated power supply using NCP1052 by  
buck and buck-boost topology. The NCP1052 is one of the  
latest low-cost switching controllers with integrated 700 V/  
300 mA power switch from ON Semiconductor. It is  
primarily designed for isolated 10 W-range flyback  
converter. If isolation is not needed, the IC can also be used  
as stepping-down buck and buck-boost converter for  
further cost saving by removing optocoupler and replacing  
the transformer by an inductor. The output current capability  
is 100 mA. The possible operating range is from input range  
between 20 Vdc and 700 Vdc to output range of 5.0 V or  
above with 100 mA. Typical efficiency around 65% is  
obtained in the 12 V buck demo board.  
converters. The rectifier circuit, which consists of capacitor  
C and diode D , is in the front end for AC or DC input  
3
3
voltage. Then, the NCP1052 is self-powered up from the  
rectified input voltage directly with a V capacitor C .  
CC  
2
When the switch inside the IC is opened, there is a voltage  
across Drain (D) and Source (S) pins of the IC. If this voltage  
is greater than 20 V, an internal current source I  
= 6.3 mA  
start  
(typ.) inside the IC charges up C and a voltage in C is built  
2
2
up for the operation of the IC. Comparing to the switching  
frequency, the V voltage level is in a lower-frequency  
CC  
7.5-8.5 V hysteresis loop. This V hysteresis loop is for  
CC  
frequency jittering features to minimize EMI and  
short-circuit fault timing function.  
Advantages of the proposed circuits include:  
D
Z
D
2
2
1
R
1
• Comparing to flyback, buck and buck-boost eliminates  
optocoupler and replaces transformer by an inductor for  
cost saving.  
FB  
C
D
1
D
L
3
D
S
• Buck and buck-boost offers smaller voltage stress in  
switches comparing to flyback. It minimizes the  
switching loss and increases efficiency.  
V
CC  
Z
1
Input  
C
Output  
C
3
C
2
• NCP105x can power up itself from the high input  
voltage with wide range between 20 Vdc and 700 Vdc.  
It needs no extra supply circuit.  
(a) Buck  
D
Z
2
D
1
2
• NCP105x operates at 44, 100, or 136 kHz and  
accommodates low-cost components such as aluminum  
electrolytic capacitors and powered-iron core magnetic.  
FB  
C
1
D
3
D
S
• NCP105x offers frequency jittering for reduced  
electromagnetic inference (EMI).  
• NCP105x offers thermal and short circuit fault  
protection.  
D
V
CC  
Z
1
C
R
Input  
Output  
L
1
C
3
C
2
(b) Buck-boost  
• Simple design as no control-loop compensation is  
concerned.  
Figure 1. Proposed Circuit Using NCP1052  
The proposed buck and buck-boost converters are very  
similar to each other. Their major difference is that buck  
provides a positive output voltage but buck-boost provides  
a negative output voltage referring to the input ground.  
In Figure 2a it is noted that in the buck topology the input  
voltage powers up the IC through the path across the  
inductor L and capacitor C. This charging path passes  
Semiconductor Components Industries, LLC, 2003  
1
Publication Order Number:  
June, 2003 - Rev. 1  
AND8098/D  
1234567...10

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