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5962-9462201MVA

更新时间： 2024-02-09 10:26:03

品牌	Logo	应用领域
德州仪器 - TI		驱动器
页数	文件大小	规格书
14页	1014K
描述
Resonant Fluorescent Lamp Driver

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数据手册

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5962-9462201MVA 数据手册

UC1871

UC2871

UC3871

Resonant Fluorescent Lamp Driver

FEATURES

DESCRIPTION

•

1µA ICC when Disabled

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 1µA, 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.

PWM Control for LCD Supply

Zero Voltage Switched (ZVS) on

Push-Pull Drivers

•

Open Lamp Detect Circuitry

4.5V to 20V Operation

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.

Non-saturating Transformer

Topology

The Buck controller is optimized for smooth duty cycle control to 100%, while

the flyback control ensures a maximum duty cycle of 95%.

•

Smooth 100% Duty Cycle on

Buck PWM and 0% to 95% on

Flyback PWM

Other features include a precision 1% reference, under voltage lockout, flyback

current limit, and accurate minimum and maximum frequency control.

BLOCK DIAGRAM

UDG-92061-1

Note: Pin numbers refer to DIL-18 and SOIC-18 packages only.

10/94

12 3 4 5 6 7...14

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