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CS2843A

更新时间： 2024-11-18 04:12:39
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安森美 - ONSEMI /
页数 文件大小 规格书
10页 274K
描述
Off-Line Current Mode PWM Control Circuit with Undervoltage Lockout

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CS2843A 数据手册

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CS2842A, CS3842A,  
CS2843A, CS3843A  
Off−Line Current Mode  
PWM Control Circuit with  
Undervoltage Lockout  
http://onsemi.com  
MARKING  
The CS284XA, CS384XA provides all the necessary features to  
implement off−line fixed frequency current−mode control with a  
minimum number of external components.  
The CS384XA family incorporates a new precision  
temperature−controlled oscillator with an internally trimmed  
discharge current to minimize variations in frequency. A precision  
duty−cycle clamp eliminates the need for an external oscillator when a  
50% duty−cycle is used. Duty−cycles greater than 50% are also  
DIAGRAM  
8
x84yA  
AWL  
YYWW  
DIP−8  
N SUFFIX  
CASE 626  
8
1
8
1
possible. On board logic ensures that V  
is stabilized before the  
REF  
output stage is enabled. Ion implant resistors provide tighter control of  
undervoltage lockout.  
Other features include low startup current, pulse−by−pulse current  
limiting, and a high−current totem pole output for driving capacitive  
loads, such as the gate of power MOSFET. The output is LOW in the  
off state, consistent with N−channel devices.  
The CS384XA series of current−mode control ICs are available in  
8 and14 lead packages for surface mount (SO) applications as well as  
8 lead PDIP packages.  
SO−8  
D SUFFIX  
CASE 751  
x84yA  
ALYWX  
8
1
1
14  
SO−14  
D SUFFIX  
CASE 751A  
CSx84yA  
AWLYWW  
14  
1
1
Features  
• Optimized for Off−line Control  
x
y
= 2 or 3  
= 2 or 3  
• Internally Trimmed Temperature Compensated Oscillator  
• Maximum Duty−Cycle Clamp  
A
= Assembly Location  
WL, L = Wafer Lot  
YY, Y = Year  
WW, W = Work Week  
• V  
Stabilized Before Output Stage is Enabled  
REF  
• Low Startup Current  
• Pulse−By−Pulse Current Limiting  
• Improved Undervoltage Lockout  
• Double Pulse Suppression  
• 1.0% Trimmed Bandgap Reference  
• High Current Totem Pole Output  
ORDERING INFORMATION  
See detailed ordering and shipping information in the package  
dimensions section on page 8 of this data sheet.  
© Semiconductor Components Industries, LLC, 2006  
1
Publication Order Number:  
July, 2006 − Rev. 4  
CS2842A/D  
1234567...10

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