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參數(shù)資料
| 型號： | UC3846 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | SMPS（Switch-Mode Power Suppy) Controller(開關(guān)模式電源控制器) |
| 中文描述： | 開關(guān)電源（開關(guān)模式電源Suppy）控制器（開關(guān)模式電源控制器） |
| 文件頁數(shù)： | 1/10頁 |
| 文件大?。?/td> | 67K |
| 代理商： | UC3846 |
2000 Fairchild Semiconductor International
www.fairchildsemi.com
Rev. 5.0
Features
Automatic Feed Forward Compensation
Programmable Pulse by Pulse Current Limiting
Automatic Symmetry Correction in Push-Pull
Configuration
Enhanced Load Response Characteristics
Parallel Operation Capability for Modulator Power
Systems
Differential Current Sense Amplifier with Common Mode
Range
Double Pulse Suppression
200mA Totem-Pole Outputs
±
2% Band gap Reference
Under-Voltage Lockout
Soft-Start Capability
Shutdown Terminal
500KHz Operation
Description
The UC3846 control IC provides all of the necessary fea-
tures to implement fixed frequency, current mode control
schemes while maintaining a minimum external parts count.
The superior performance of this technique can be measured
in improved line regulation, enhanced load response char-
acteristics, and a simpler, easier-to-design control loop.
Topological advantages include inherent pulse-by-pulse cur-
rent limiting capability, automatic symmetry correction for
push-pull converters, and the ability to parallel “power
module
,,
while maintaining equal current sharing. Protection
circuitry includes built-in-under-voltage lockout and pro-
grammable current limit in addition to soft-start capability. A
shutdown function is also available which can initiate either
a complete shutdown with automatic restart or latch the
supply off. Other features include fully latched operation,
double pulse suppression, deadtime adjust capability, and
±2% trimmed bandgap reference. The UC3846 features low
outputs in the OFF state.
16-DIP
1
Internal Block Diagram
10
UC3846
SMPS Controller
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UC3846DW | 功能描述:電流型 PWM 控制器 Current-Mode PWM Controller RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| UC3846DW | 制造商:UNITRODE 功能描述:PWM CONTROLLER SMD 3846 SOIC16 |
| UC3846DW | 制造商:Texas Instruments 功能描述:IC CURRENT MODE PWM CTRL 40V 16-SOIC 制造商:Texas Instruments 功能描述:IC, CURRENT MODE PWM CTRL, 40V, 16-SOIC |
| UC3846DWG4 | 功能描述:電流型 PWM 控制器 Current-Mode PWM Controller RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| UC3846DWTR | 功能描述:電流型 PWM 控制器 Current-Mode PWM Controller RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
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