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參數資料
| 型號： | UC2871DWTR |
| 英文描述： | Intelligent quad (2x5A/2x2.5A ) low-side switch |
| 中文描述： | 諧振模式開關電源控制器 |
| 文件頁數： | 1/6頁 |
| 文件大小： | 490K |
| 代理商： | UC2871DWTR |
10/94
BLOCK DIAGRAM
1
μ
A ICC when Disabled
PWM Control for LCD Supply
Zero Voltage Switched (ZVS) on
Push-Pull Drivers
Open Lamp Detect Circuitry
4.5V to 20V Operation
Non-saturating Transformer
Topology
Smooth 100% Duty Cycle on
Buck PWM and 0% to 95% on
Flyback PWM
The UC1871 Family of IC’s is optimized for highly efficient fluorescent lamp
control. An additional PWM controller is integrated on the IC for applications re-
quiring an additional supply, as in LCD displays. When disabled the IC draws
only 1
μ
A, providing a true disconnect feature, which is optimum for battery
powered systems. The switching frequency of all outputs are synchronized to
the resonant frequency of the external passive network, which provides Zero
Voltage Switching on the Push-Pull drivers.
Soft-Start and open lamp detect circuitry have been incorporated to minimize
component stress. An open lamp is detected on the completion of a soft-start
cycle.
The Buck controller is optimized for smooth duty cycle control to 100%, while
the flyback control ensures a maximum duty cycle of 95%.
Other features include a precision 1% reference, under voltage lockout, flyback
current limit, and accurate minimum and maximum frequency control.
Resonant Fluorescent Lamp Driver
FEATURES
DESCRIPTION
UDG-92061-1
UC1871
UC2871
UC3871
Note: Pin numbers refer to DIL-18 and SOIC-18 packages only.
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相關代理商/技術參數 |
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| UC2871DWTRG4 | 制造商:Texas Instruments 功能描述:FLUORESCENT LAMP DRVR 20V 18SOIC - Tape and Reel |
| UC2871N | 功能描述:顯示驅動器和控制器 Resonant Fluorescent Lamp Driver RoHS:否 制造商:Panasonic Electronic Components 工作電源電壓:2.7 V to 5.5 V 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Reel |
| UC2871NG4 | 功能描述:顯示驅動器和控制器 Resonant Fluorescent Lamp Driver RoHS:否 制造商:Panasonic Electronic Components 工作電源電壓:2.7 V to 5.5 V 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Reel |
| UC2871Q | 功能描述:顯示驅動器和控制器 Resonant Fluorescent Lamp Driver RoHS:否 制造商:Panasonic Electronic Components 工作電源電壓:2.7 V to 5.5 V 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Reel |
| UC2871QG3 | 功能描述:顯示驅動器和控制器 Resonant Fluorescent Lamp Driver RoHS:否 制造商:Panasonic Electronic Components 工作電源電壓:2.7 V to 5.5 V 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:QFN-44 封裝:Reel |
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