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UCC25702

更新时间： 2024-11-30 22:41:47
品牌 Logo 应用领域
德州仪器 - TI 脉冲
页数 文件大小 规格书
10页 165K
描述
Advanced Voltage Mode Pulse Width Modulator

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UCC25702 数据手册

 浏览型号UCC25702的Datasheet PDF文件第2页浏览型号UCC25702的Datasheet PDF文件第3页浏览型号UCC25702的Datasheet PDF文件第4页浏览型号UCC25702的Datasheet PDF文件第5页浏览型号UCC25702的Datasheet PDF文件第6页浏览型号UCC25702的Datasheet PDF文件第7页 
application  
INFO  
UCC15701/2  
UCC25701/2  
UCC35701/2  
available  
Advanced Voltage Mode Pulse Width Modulator  
FEATURES  
DESCRIPTION  
• 700kHz Operation  
The UCC35701/UCC35702 family of pulse width modulators is intended for  
isolated switching power supplies using primary side control. They can be  
used for both off-line applications and DC/DC converter designs such as in  
a distributed power system architecture or as a telecom power source.  
• Integrated Oscillator/ Voltage Feed  
Forward Compensation  
• Accurate Duty Cycle Limit  
• Accurate Volt-second Clamp  
• Optocoupler Interface  
The devices feature low startup current, allowing for efficient off-line start-  
ing, yet have sufficient output drive to switch power MOSFETs in excess of  
500kHz.  
Voltage feed forward compensation is operational over a 5:1 input range  
and provides fast and accurate response to input voltage changes over a  
4:1 range. An accurate volt-second clamp and maximum duty cycle limit  
are also featured.  
• Fault Counting Shutdown  
• Fault Latch off or Automatic Shutdown  
• Soft Stop Optimized for Synchronous  
Rectification  
Fault protection is provided by pulse by pulse current limiting as well as the  
ability to latch off after a programmable number of repetitive faults has oc-  
curred.  
• 1A Peak Gate Drive Output  
• 130µA Start-up Current  
• 750µA Operating Current  
Two UVLO options are offered. UCC35701 family has turn-on and turn-off  
thresholds of 13V/9V and UCC35702 family has thresholds of 9.6V/8.8V.  
The UCC35701/2 and the UCC25701/2 are offered in the 14 pin SOIC (D),  
14 pin PDIP (N) or in 14 pin TSSOP (PW) packages. The UCC15701/2 is  
offered in the 14 pin CDIP (J) package.  
TYPICAL APPLICATION DIAGRAM  
V
SUPPLY  
IN  
R1  
R6  
R2  
R7  
VFF  
6
VDD  
3
R3  
7
RT  
VREF  
UCC35701  
CT  
CS  
V
C6  
OUT  
10 CT  
C4  
C1  
R4  
9
VSCLAMP  
R8  
C2  
OUT  
ILIM  
4
2
R5  
11 SYNC  
14 SS  
R10  
CF  
RCS  
1
COUNT  
C3  
R
F
12 VREF  
PGND  
GND  
5
V RETURN  
IN  
R8  
RGND  
8
FB  
13  
R11  
V
OUT  
C5  
R13  
C7  
R12  
C6  
R14  
R15  
UDG-98005-1  
SLUS293A - JANUARY 2000  
1234567...10

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UCC25702 替代型号

型号 品牌 替代类型 描述 数据表
UCC35702 TI

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 Advanced Voltage Mode Pulse Width Modulator

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