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UCC25705DTR

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
18页 351K
描述
HIGH - SPEED VOLTAGE MODE PULSE MODE WIDTH MODULATOR

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中文翻译

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UCC25705DTR 数据手册

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SLUS473A – NOVEMBER 1999 – REVISED MARCH 2001  
D, OR P PACKAGE  
(TOP VIEW)  
D
D
Greater Than 4-MHz Operation  
Integrated Oscillator / Voltage Feed Forward  
Compensation  
ILIM  
FB  
VDD  
OUT  
GND  
RC  
1
2
3
4
8
7
6
5
D
D
D
D
D
D
D
>4:1 Input Voltage Range  
DGK PACKAGE  
(TOP VIEW)  
VFF  
25-ns Current Limit Delay  
DISCH  
Programmable Maximum Duty Cycle Clamp  
Optocoupler Interface  
1
2
3
4
8
7
6
5
ILIM  
VDD  
50-µA Start-Up Current  
FB  
OUT  
GND  
RC  
4.2-mA Operating Current @ 1 MHz  
VFF  
Smallest Footprint of the 8-pin MSOP  
Package Minimizes Board Area and Height  
DISCH  
description  
The UCC35705 and UCC35706 devices are 8-pin voltage mode primary side controllers with fast over-current  
protection. These devices are used as core high-speed building blocks in high performance isolated and non-isolated  
power converters.  
UCC35705/UCC35706 devices feature a high speed oscillator with integrated feed-forward compensation for  
improved converter performance. A typical current sense to output delay time of 25 ns provides fast response to  
overload conditions. The IC also provides an accurate programmable maximum duty cycle clamp for increased  
protection which can also be disabled for the oscillator to run at maximum possible duty cycle.  
Two UVLO options are offered. The UCC35705 with lower turn-on voltage is intended for dc-to-dc converters while  
the higher turn-on voltage and the wider UVLO range of the UCC35706 is better suited for offline applications.  
The UCC35705/UCC35706 family is offered in 8-pin MSOP (DGK), SOIC (D) and PDIP (P) packages.  
typical application schematic  
+
+
V
OUT  
–
V
IN  
–
VDD  
FB  
8
2
4
DISCH  
TPS2829  
5
3
RC  
OUT  
7
1
VFF  
FET DRIVER  
SOFT  
START  
CIRCUIT  
6
GND  
ILIM  
UCC35705/6  
MODE = 1  
UDG-99181  
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
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Copyright 2001, Texas Instruments Incorporated  
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中文翻译

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UCC25705DTR 替代型号

型号 品牌 替代类型 描述 数据表
UCC25705DG4 TI

完全替代

 High Speed Voltage Mode Pulse Width Modulator 8-SOIC -40 to 85
UCC25705D TI

类似代替

 HIGH - SPEED VOLTAGE MODE PULSE MODE WIDTH MODULATOR

与UCC25705DTR相关器件

型号 品牌 获取价格 描述 数据表
UCC25705P TI

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 		HIGH - SPEED VOLTAGE MODE PULSE MODE WIDTH MODULATOR
UCC25705PG4 TI

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 		HIGH - SPEED VOLTAGE MODE PULSE MODE WIDTH MODULATOR
UCC25706 TI

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 		HIGH - SPEED VOLTAGE MODE PULSE MODE WIDTH MODULATOR
UCC25706D TI

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 		HIGH - SPEED VOLTAGE MODE PULSE MODE WIDTH MODULATOR
UCC25706DGK TI

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 		HIGH - SPEED VOLTAGE MODE PULSE MODE WIDTH MODULATOR
UCC25706DGKR TI

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 		0.02A SWITCHING CONTROLLER, 4000kHz SWITCHING FREQ-MAX, PDSO8, GREEN, PLASTIC, MSOP-8
UCC25706DGKTR TI

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 		HIGH - SPEED VOLTAGE MODE PULSE MODE WIDTH MODULATOR
UCC25706DGKTRG4 TI

获取价格

 		0.02A SWITCHING CONTROLLER, 4000kHz SWITCHING FREQ-MAX, PDSO8, GREEN, PLASTIC, MSOP-8
UCC25706DR TI

获取价格

 		0.02A SWITCHING CONTROLLER, 4000kHz SWITCHING FREQ-MAX, PDSO8, GREEN, PLASTIC, MS-012AA, S
UCC25706DTR TI

获取价格

 		HIGH - SPEED VOLTAGE MODE PULSE MODE WIDTH MODULATOR

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