UC2872

現行

具有開放燈偵測電路的諧振燈鎮流器控制器

立即訂購

產品規格表

document-pdfAcrobat Resonant Lamp Ballast Controller datasheet (英文)

UC2872

現行

產品規格表

立即訂購

產品詳細資料

Vin (min) (V)

4.5

Vin (max) (V)

24

Operating temperature range (°C)

-40 to 85

Rating

Catalog

Features

Soft Start

Vin (min) (V)

4.5

Vin (max) (V)

24

Operating temperature range (°C)

-40 to 85

Rating

Catalog

Features

Soft Start

SOIC (DW)

16

106.09 mm² 10.3 x 10.3

Controls Different Types of Lamps: Cold Cathode Fluorescent, Neon, and Gas Discharge
Zero Voltage Switching (ZVS) of Push-Pull Drivers
Accurate Control of Lamp Current
Variable Lamp Intensity Control
1\xB5A Disable Current
4.5V to 24V Operation
Open Lamp Detection Circuitry

Controls Different Types of Lamps: Cold Cathode Fluorescent, Neon, and Gas Discharge
Zero Voltage Switching (ZVS) of Push-Pull Drivers
Accurate Control of Lamp Current
Variable Lamp Intensity Control
1\xB5A Disable Current
4.5V to 24V Operation
Open Lamp Detection Circuitry

The UC3872 is a resonant lamp ballast controller optimized for driving cold cathode fluorescent, neon, and other gas discharge lamps. The resonant power stage develops a sinusoidal lamp drive voltage, and minimizes switching loss and EMI generation. Lamp intensity adjustment is accomplished with a buck regulator, which is synchronized to the external power stage\x92s resonant frequency. Suitable for automotive and battery powered applications, the UC3872 draws only 1\xB5A when disabled.

Soft start and open lamp detect circuitry have been incorporated to minimize component stresses. Open lamp detection is enabled at the completion of a soft start cycle. The chip is optimized for smooth duty cycle control to 100%.

Other features include a precision 1.2% reference, undervoltage lockout, and accurate minimum and maximum frequency control.

The UC3872 is a resonant lamp ballast controller optimized for driving cold cathode fluorescent, neon, and other gas discharge lamps. The resonant power stage develops a sinusoidal lamp drive voltage, and minimizes switching loss and EMI generation. Lamp intensity adjustment is accomplished with a buck regulator, which is synchronized to the external power stage\x92s resonant frequency. Suitable for automotive and battery powered applications, the UC3872 draws only 1\xB5A when disabled.

Soft start and open lamp detect circuitry have been incorporated to minimize component stresses. Open lamp detection is enabled at the completion of a soft start cycle. The chip is optimized for smooth duty cycle control to 100%.

Other features include a precision 1.2% reference, undervoltage lockout, and accurate minimum and maximum frequency control.

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