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NCP1200_09 PDF预览

NCP1200_09

更新时间: 2024-11-05 12:24:59
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 359K
描述
PWM Current-Mode Controller for Low-Power Universal Off-Line Supplies

NCP1200_09 数据手册

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NCP1200  
PWM Current-Mode  
Controller for Low-Power  
Universal Off-Line Supplies  
Housed in SOIC8 or PDIP8 package, the NCP1200 represents a  
major leap toward ultracompact 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 shortcircuit  
protection lets the designer build an extremely lowcost ACDC 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 gatecharge switching devices like  
an IGBT or a MOSFET thus requiring a very small operating power.  
Due to currentmode control, the NCP1200 drastically simplifies the  
design of reliable and cheap offline converters with extremely low  
acoustic generation and inherent pulsebypulse control.  
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.  
Finally, the IC is selfsupplied from the DC rail, eliminating the  
need of an auxiliary winding. This feature ensures operation in  
presence of low output voltage or shorts.  
http://onsemi.com  
MARKING  
DIAGRAMS  
8
200Dy  
ALYW  
G
SOIC8  
D SUFFIX  
CASE 751  
8
8
1
1
8
PDIP8  
P SUFFIX  
CASE 626  
1200Pxxx  
AWL  
YYWWG  
1
1
xxx  
= Device Code: 40, 60 or 100  
= Device Code:  
4 for 40  
y
6 for 60  
1 for 100  
A
L
= Assembly Location  
= Wafer Lot  
Features  
No Auxiliary Winding Operation  
Y, YY = Year  
W, WW = Work Week  
G, G  
Internal Output ShortCircuit Protection  
Extremely Low NoLoad Standby Power  
CurrentMode with SkipCycle Capability  
Internal Leading Edge Blanking  
= PbFree Package  
PIN CONNECTIONS  
250 mA Peak Current Source/Sink Capability  
Internally Fixed Frequency at 40 kHz, 60 kHz and 100 kHz  
Direct Optocoupler Connection  
Adj  
FB  
1
2
3
4
8
7
6
5
HV  
NC  
V
Builtin Frequency Jittering for Lower EMI  
SPICE Models Available for TRANsient and AC Analysis  
Internal Temperature Shutdown  
CS  
CC  
GND  
Drv  
These Devices are PbFree, Halogen Free/BFR Free and are RoHS  
(Top View)  
Compliant  
Typical Applications  
ORDERING INFORMATION  
ACDC Adapters  
Offline Battery Chargers  
Auxiliary/Ancillary Power Supplies (USB, Appliances, TVs, etc.)  
See detailed ordering and shipping information in the package  
dimensions section on page 14 of this data sheet.  
© Semiconductor Components Industries, LLC, 2009  
1
Publication Order Number:  
December, 2009 Rev. 17  
NCP1200/D  

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