UC3872MG4屬于集成電路（IC）的照明鎮(zhèn)流器控制器。由美國德州儀器公司制造生產(chǎn)的UC3872MG4照明，鎮(zhèn)流器控制器此產(chǎn)品族中的產(chǎn)品可用于實(shí)現(xiàn)控制和調(diào)節(jié)功能。對(duì)于日光燈、電致發(fā)光燈和 HID 燈等非 LED 照明工具的正常工作，這些功能很有必要或十分有用。既定器件所具備的特定功能集因預(yù)期用途各異，并且所供應(yīng)的產(chǎn)品可能包括相應(yīng)資源以直接控制驅(qū)動(dòng)負(fù)載的電源，也可能不包括這些資源。

FEATURES

? 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

? 1μA Disable Current

? 4.5V to 24V Operation

? Open Lamp Detection Circuitry

DESCRIPTION

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’s resonant frequency. Suitable for automotive and battery

powered applications, the UC3872 draws only 1μA 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.