LYT1404D集成電路（IC）的LED驅(qū)動器規(guī)格書PDF中文資料

Single-Stage PFC + Accurate CC Output

? ±3 CC regulation in single line input voltage applications

? Power factor >0.9

? High efficiency >93

? Robust 725 V MOSFET for increased line voltage surge performance

? Critical Conduction Mode (CrM) buck

? Low EMI

? Excellent line noise and transient rejection

Design Flexibility

? Supports high- and low-side buck topologies

? Wide input (90 VAC – 308 VAC) and output voltage range operation

? 3 family members cover power range for optimum device selection

? Requires no inductor bias winding

Highest Reliability

? Lowest component count

? Comprehensive protection features with auto-restart

? Input and output overvoltage protection (OVP)

? Output short-circuit protection

? Open-loop protection

? Advanced thermal control

? Thermal foldback ensures that light continues to be delivered at

elevated temperatures

? Over-temperature shutdown provides protection during fault

conditions

Description

The LYTSwitch?-1 family is ideal for single-stage, high PF, constant

current LED bulbs and tubes.

The family incorporates a high-voltage MOSFET with a variable on-time

CrM controller. Extensive protection features with minimum external

components provide industry leading power density and functionality.

The devices can be used in high-side or low-side non-isolated buck

topology.

The CrM operation results in low turn-on losses and reduces cost of

output diode (slower reverse recovery).

LYTSwitch-1 devices are suitable for applications from 2 W to 22 W.

See Table 1 for selection guidance.