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NCP1200

更新时间： 2024-09-14 21:54:43
品牌 Logo 应用领域
安森美 - ONSEMI 控制器
页数 文件大小 规格书
16页 154K
描述
PWM Current-Mode Controller for Low-Power Universal Off-Line Supplies

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NCP1200  
PWM Current−Mode  
Controller for Low−Power  
Universal Off−Line Supplies  
Housed in SOIC−8 or PDIP−8 package, the NCP1200 represents a  
major leap toward ultra−compact Switchmode Power Supplies. Due to  
a novel concept, the circuit allows the implementation of a complete  
offline battery charger or a standby SMPS with few external  
components. Furthermore, an integrated output short−circuit  
protection lets the designer build an extremely low−cost AC−DC wall  
adapter associated with a simplified feedback scheme.  
With an internal structure operating at a fixed 40 kHz, 60 kHz or  
100 kHz, the controller drives low gate−charge switching devices like  
an IGBT or a MOSFET thus requiring a very small operating power.  
Due to current−mode control, the NCP1200 drastically simplifies the  
design of reliable and cheap offline converters with extremely low  
acoustic generation and inherent pulse−by−pulse control.  
http://onsemi.com  
MARKING  
DIAGRAMS  
8
SOIC−8  
D SUFFIX  
CASE 751  
200Dy  
ALYW  
8
8
1
1
8
PDIP−8  
P SUFFIX  
CASE 626  
1200Pxxx  
AWL  
YYWW  
When the current setpoint falls below a given value, e.g. the output  
power demand diminishes, the IC automatically enters the skip cycle  
mode and provides excellent efficiency at light loads. Because this  
occurs at low peak current, no acoustic noise takes place.  
1
1
xxx  
y
= Device Code: 40, 60 or 100  
= Device Code:  
4 for 40  
Finally, the IC is self−supplied from the DC rail, eliminating the  
need of an auxiliary winding. This feature ensures operation in  
presence of low output voltage or shorts.  
6 for 60  
1 for 100  
A
L
= Assembly Location  
= Wafer Lot  
Features  
• No Auxiliary Winding Operation  
Y, YY = Year  
W, WW = Work Week  
• Internal Output Short−Circuit Protection  
• Extremely Low No−Load Standby Power  
• Current−Mode with Skip−Cycle Capability  
• Internal Leading Edge Blanking  
• 250 mA Peak Current Source/Sink Capability  
• Internally Fixed Frequency at 40 kHz, 60 kHz and 100 kHz  
• Direct Optocoupler Connection  
• Built−in Frequency Jittering for Lower EMI  
• SPICE Models Available for TRANsient and AC Analysis  
• Internal Temperature Shutdown  
PIN CONNECTIONS  
Adj  
FB  
1
2
3
4
8
7
6
5
HV  
NC  
V
CS  
CC  
GND  
Drv  
(Top View)  
• Pb−Free Packages are Available  
ORDERING INFORMATION  
Typical Applications  
See detailed ordering and shipping information in the package  
dimensions section on page 14 of this data sheet.  
• AC−DC Adapters  
• Offline Battery Chargers  
• Auxiliary/Ancillary Power Supplies (USB, Appliances, TVs, etc.)  
Semiconductor Components Industries, LLC, 2004  
1
Publication Order Number:  
December, 2004 − Rev. 13  
NCP1200/D  
1234567...16

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