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NCP1217D133R2G PDF预览

NCP1217D133R2G

更新时间: 2024-11-28 22:54:31
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安森美 - ONSEMI 控制器
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18页 198K
描述
Enhanced PWM Current-Mode Controller for High-Power Universal Off-Line Supplies

NCP1217D133R2G 数据手册

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NCP1217, NCP1217A  
Enhanced PWM Current−Mode  
Controller for High−Power  
Universal Off−Line Supplies  
Housed in an SO−8 or PDIP−7 package, the NCP1217 represents  
the enhanced version of the NCP1203−based controllers. Thanks to its  
high drive capability, NCP1217 drives large gate−charge MOSFETs,  
which together with internal ramp compensation and built−in  
overvoltage protection, ease the design of modern AC/DC adapters.  
NCP1217 offers a true alternative to UC384X−based designs.  
With an internal structure operating at different fixed frequencies  
(65–100–133 kHz), the controller features a high−voltage startup FET,  
which ensures a clean and loss less startup sequence. Its current−mode  
control topology provides an excellent input audio−susceptibility and  
inherent pulse−by−pulse control. Internal ramp compensation easily  
prevents subharmonic oscillations from taking place in continuous  
conduction mode designs.  
When the current setpoint falls below a given value, e.g. the output  
power demand diminishes, the IC automatically enters the so−called  
skip cycle mode and provides excellent efficiency at light loads.  
Because this occurs at a user adjustable low peak current, no acoustic  
noise takes place.  
The NCP1217 features two efficient protective circuitries: 1) In  
presence of an overcurrent condition, the output pulses are disabled  
and the device enters a safe burst mode, trying to restart. Once the  
default has gone, the device auto−recovers. 2) If an external signal  
(e.g. a temperature sensor) pulls Pin 1 above 3.2 V, output pulses are  
immediately stopped and the NCP1217 stays latched in this position.  
http://onsemi.com  
MINIATURE PWM  
CONTROLLER FOR HIGH  
POWER AC/DC WALL  
ADAPTERS AND OFFLINE  
BATTERY CHARGERS  
MARKING  
DIAGRAMS  
8
SO−8  
D SUFFIX  
CASE 751  
17XXX  
ALYW  
8
1
1
PDIP−7  
P SUFFIX  
CASE 626B  
P1217XXXX  
AWL  
YYWW  
Reset occurs when the V collapses to ground, e.g. the user unplugs  
CC  
8
the power supply.  
1
1
Features  
Current−Mode with Adjustable Skip−Cycle Capability  
Built−in Internal Ramp Compensation  
Auto−Recovery Internal Output Short−Circuit Protection  
Internal 1.0 ms Soft−Start (A Version Only)  
Limited Duty−Cycle to 50% (A Version Only)  
Full Latchoff if Adjustment Pin is Brought High  
Extremely Low No−Load Standby Power  
Internal Temperature Shutdown  
XXXX = Specific Device Code*  
= Assembly Location  
WL, L = Wafer Lot  
YY, Y = Year  
A
WW, W = Work Week  
*DEVICE MARKING INFORMATION  
See detailed device marking information in the ordering  
information section on page 16 of this data sheet.  
500 mA Peak Current Capability  
Fixed Frequency Versions at 65 kHz, 100 kHz and 133 kHz  
Direct Optocoupler Connection  
Internal Leading Edge Blanking  
SPICE Models Available for TRANsient and AC Analysis  
Pb−Free Packages are Available  
PIN CONNECTIONS  
Adj  
FB  
1
2
3
4
8
7
6
5
HV  
NC  
V
CS  
CC  
Gnd  
Drv  
Typical Applications  
High Power AC/DC Converters for TVs, Set−Top Boxes, etc.  
Offline Adapters for Notebooks  
Telecom DC−DC Converters  
(Top View)  
ORDERING INFORMATION  
All Power Supplies  
See detailed ordering and shipping information in the ordering  
information section on page 16 of this data sheet.  
Semiconductor Components Industries, LLC, 2004  
1
Publication Order Number:  
July, 2004 − Rev. 3  
NCP1217/D  

NCP1217D133R2G 替代型号

型号 品牌 替代类型 描述 数据表
NCP1217D133R2 ONSEMI

完全替代

Enhanced PWM Current-Mode Controller for High-Power Universal Off-Line Supplies

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