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參數(shù)資料
| 型號： | UC3874DWTR-1 |
| 英文描述： | Triple 3-input NAND gate |
| 中文描述： | 電流模式開關(guān)電源控制器 |
| 文件頁數(shù)： | 1/6頁 |
| 文件大?。?/td> | 490K |
| 代理商： | UC3874DWTR-1 |
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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PDF描述 |
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| UC3874DWTR-2 | Current-Mode SMPS Controller |
| UC3874QTR-1 | 3 to 8 line decoder (inverting) |
| UC3874QTR-2 | 3 to 8 line decoder (inverting) |
| UC3875DWP | Hex Schmitt inverter |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| UC3874DWTR-1G4 | 功能描述:DC/DC 開關(guān)控制器 Hi Eff Synch Step down Buck Cntrlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| UC3874DWTR-2G4 | 制造商:Texas Instruments 功能描述:HIGH EFFICIENCY, SYNCHRONOUS, STEP-DOWN (BUCK) CONTROLLER - Tape and Reel |
| UC3874N-1 | 功能描述:DC/DC 開關(guān)控制器 Hi Eff Synch Step down Buck Cntrlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| UC3874N-1G4 | 功能描述:DC/DC 開關(guān)控制器 Hi Eff Synch Step down Buck Cntrlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| UC3874N-2 | 功能描述:DC/DC 開關(guān)控制器 Hi Eff Synch Step down Buck Cntrlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
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