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NCP1215

更新时间： 2024-11-28 22:54:31
品牌 Logo 应用领域
安森美 - ONSEMI 开关控制器
页数 文件大小 规格书
16页 151K
描述
Low Cost Variable OFF Time Switched Mode Power Supply Controller

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NCP1215 数据手册

 浏览型号NCP1215的Datasheet PDF文件第2页浏览型号NCP1215的Datasheet PDF文件第3页浏览型号NCP1215的Datasheet PDF文件第4页浏览型号NCP1215的Datasheet PDF文件第5页浏览型号NCP1215的Datasheet PDF文件第6页浏览型号NCP1215的Datasheet PDF文件第7页 
NCP1215  
Product Preview  
Low Cost Variable OFF Time  
Switched Mode Power  
Supply Controller  
http://onsemi.com  
MARKING  
The NCP1215 is a controller for low power off−line flyback  
Switchemode Power Supplies (SMPS) featuring low size, weight and  
cost constraints together with a good low standby power performance.  
The operating principle uses switching frequency reduction at light  
load by increasing the OFF Time. Also, when OFF Time expands, the  
peak current is gradually reduced down to approximately 1/4 of the  
maximum peak current to prevent from exciting the transformer  
mechanical resonances. The risk of acoustic noise is thus greatly  
diminished while keeping good standby power performance.  
A low power internal supply block also ensures very low current  
consumption at startup without hampering the standby power  
performance.  
A special primary current sensing technique minimizes the impact  
of SMPS switching on control IC operation. The choice of peak  
voltage across the current sense resistor allows dissipation to be  
further reduced. The negative current sensing technique offers  
advantages over a traditional approach by avoiding the voltage drop  
incurred by traditional MOSFET source sensing. Thus, the IC drive  
capability is greatly improved.  
DIAGRAMS  
8
SOIC−8  
D SUFFIX  
CASE 751  
P1215  
ALYW  
8
1
1
6
TSOP−6  
(SOT23−6, SC59−6)  
SN SUFFIX  
6
FAAYW  
1
CASE 318G  
1
FAA = Specific Device Code  
A
L
Y
W
= Assembly Location  
= Wafer Lot  
= Year  
= Work Week  
PIN CONNECTIONS  
SOIC−8  
Finally, the bulk input ripple ensures a natural frequency dithering  
which smooths the EMI signature.  
FB  
CT  
1
2
3
4
8
7
6
5
NC  
NC  
V
Features  
• Pb−Free Package is Available  
• Variable OFF Time Control Method  
CS  
CC  
GND  
Gate  
• Very Low Current Consumption at Startup  
• Natural Frequency Dithering for Improved EMI Signature  
• Current Mode Control Operation  
(Top View)  
TSOP−6  
• Peak Current Compression Reduces Transformer Noise  
• Programmable Current Sense Resistor Peak Voltage  
• Undervoltage Lockout  
CS  
GND  
CT  
1
6
5
4
Gate  
2
V
CC  
3
FB  
Typical Applications  
(Top View)  
• Auxiliary Power Supply  
• Standby Power Supply  
• AC−DC Adapter  
ORDERING INFORMATION  
†
Device  
Package  
Shipping  
NCP1215DR2  
SOIC−8  
2500 Tape & Reel  
2500 Tape & Reel  
• Off−line Battery Charger  
NCP1215DR2G  
SOIC−8  
(Pb−Free)  
NCP1215SNT1  
TSOP−6  
3000 Tape & Reel  
†For information on tape and reel specifications,  
including part orientation and tape sizes, please  
refer to our Tape and Reel Packaging Specifications  
Brochure, BRD8011/D.  
This document contains information on a product under development. ON Semiconductor  
reserves the right to change or discontinue this product without notice.  
Semiconductor Components Industries, LLC, 2004  
1
Publication Order Number:  
October, 2004 − Rev. 2  
NCP1215/D  
1234567...16

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