LS7538中文資料LSI數(shù)據(jù)手冊(cè)PDF規(guī)格書

DESCRIPTION:

The LS7538 and LS7539 are CMOS integrated circuits which provide trigger pulses for triac phase control of incandescent lamps.

The circuits are designed to operate with a wide variety of lamp sizes ranging from small table lamps to large floor lamps.

The AGC Loop automatically adjusts Touch Sensitivity to be independent of lamp size.

FEATURES:

? Touch Sensitivity guaranteed to 600pF Touch Plate Capacitance.

? Touch Operation independent of line plug polarity.

? Pin selection of three available Brightness Step Sequences.

? Minimal external components.

? AGC Loop stabilizes immediately after Power-Up.

? Brightness state is Off after AC power applied.

? Brightness state is unchanged if AC power interrupted for < 0.5 sec.

? Advanced CMOS design for reliable operating characteristics and low power.

? 50/60 Hz Line Frequency.

? +6V to +9.5V Operation (VDD-VSS).

? LS7538, LS7539 (DIP); LS7538-S, LS7539-S (SOIC) - See Figure 1

APPLICATIONS:

? Screw-in and built-in adapter modules for converting table and floor lamps to touch control for step dimming.

? On-Off touch control of under-cabinet fluorescent lamps (LS7539 only).