LX1563屬于集成電路（IC）的PFC（功率因數(shù)校正）。由美高森美半導(dǎo)體公司制造生產(chǎn)的LX1563PFC（功率因數(shù)校正）功率因數(shù)校正 (PFC) 是用于調(diào)整交流電路中的電壓和電流之間的相位角，使之趨近于零的半導(dǎo)體器件。不同模式包括平均電流、邊界導(dǎo)通、連續(xù)導(dǎo)通、臨界導(dǎo)通、電流控制式頻率折返、不連續(xù)和不連續(xù)導(dǎo)通，開關(guān)頻率從 6 kHz 至 1.7 MHz 可調(diào)。

DESCRIPTION

The LX1562 is a second-generation family of power factor correction controllers using a discontinuous mode of operation. They are optimized for electronic ballast applications. Many improvements have been made over the original SG3561A controller introduced by Silicon General Semiconductor in 1992.

KEY FEATURES

■ INTERNAL START-UP CIRCUIT

■ INTERNAL CURRENT SENSE BLANKING

■ IMPROVED MICROPOWER START-UP

CURRENT (300μA max.)

■ CLAMPED E.A. OUTPUT FOR LOWER

TURN-ON OVERSHOOT

■ MULTIPLIER CLAMP LIMITS MAXIMUM

INPUT CURRENT

■ INTERNAL OVERVOLTAGE PROTECTION

REPLACES BUILT-IN C.S. OFFSET

■ PWM OUTPUT CLAMP LIMITS MOSFET

GATE DRIVE VOLTAGE

■ INCREASED UVLO HYSTERESIS REDUCES

START-UP TIMING (LX1562 only)

■ LOW OPERATING CURRENT CONSUMPTION

■ INTERNAL 1.5 REFERENCE

■ TOTEM POLE OUTPUT STAGE

■ AUTOMATIC CURRENT LIMITING OF BOOST

STAGE

■ DISCONTINUOUS MODE OF OPERATION

WITH NO CURRENT GAPS

■ NO SLOPE COMPENSATION REQUIRED

APPLICATIONS

■ ELECTRONIC BALLAST

■ SWITCHING POWER SUPPLIES