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NCP1217AD100R2G

更新时间： 2024-11-29 04:37:59
品牌 Logo 应用领域
安森美 - ONSEMI 控制器
页数 文件大小 规格书
18页 242K
描述
Enhanced PWM Current−Mode Controller for High−Power Universal Off−Line Supplies

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NCP1217AD100R2G 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.  
http://onsemi.com  
MARKING  
DIAGRAMS  
8
SOIC−8  
D1, D2 SUFFIX  
CASE 751  
17xxx  
ALYW  
G
8
1
1
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.  
P1217xxxx  
AWL  
YYWWG  
PDIP−8  
N SUFFIX  
CASE 626  
8
1
1
xxxx  
A
L, WL  
Y, YY  
= Specific Device Code  
= Assembly Location  
= Wafer Lot  
Reset occurs when the V collapses to ground, e.g. the user unplugs  
CC  
the power supply.  
= Year  
W, WW = Work Week  
Features  
G or G  
= Pb−Free Package  
• 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 (NCP1217A Only)  
• Limited Duty−Cycle to 50% (NCP1217A Only)  
• Full Latchoff if Adjustment Pin is Brought High  
• Extremely Low No−Load Standby Power  
• Internal Temperature Shutdown  
PIN CONNECTIONS  
Adj  
1
2
3
4
8
7
6
5
HV  
NC  
V
FB  
CS  
CC  
GND  
Drv  
• 500 mA Peak Current Capability  
(Top View)  
• Fixed Frequency Versions at 65 kHz, 100 kHz and 133 kHz  
• Direct Optocoupler Connection  
DEVICE MARKING INFORMATION  
See detailed device marking information in the ordering  
information section on page 16 of this data sheet.  
• Internal Leading Edge Blanking  
• SPICE Models Available for TRANsient and AC Analysis  
• Pb−Free Packages are Available  
Typical Applications  
ORDERING INFORMATION  
See detailed ordering and shipping information in the ordering  
information section on page 16 of this data sheet.  
• High Power AC/DC Converters for TVs, Set−Top Boxes, etc.  
• Offline Adapters for Notebooks  
• Telecom DC−DC Converters  
• All Power Supplies  
©
Semiconductor Components Industries, LLC, 2005  
1
Publication Order Number:  
September, 2005 − Rev. 4  
NCP1217/D  
1234567...18

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NCP1217AD100R2G 替代型号

型号 品牌 替代类型 描述 数据表
NCP1217AD100R2 ONSEMI

完全替代

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

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