Datasheet Texas Instruments LM3450AMT/NOPB — 数据表

LM3450
www.ti.com SNVS681D – NOVEMBER 2010 – REVISED MAY 2013 LED Drivers with Active Power Factor Correction and Phase Dimming Decoder
Check for Samples: LM3450 FEATURES DESCRIPTION The LM3450/50A is a power factor controller (PFC)
with separate phase dimming decoder. The PFC
regulates the output voltage while maintaining
excellent power factor. The phase dimming decoder
interprets the phase angle and remaps it to a 500Hz
PWM output. This device is ideal for implementing a
dimmable off-line LED driver for 10-100W loads. 1 2 Critical Conduction Mode PFC
Over-Voltage Protection
Feedback Short Circuit Protection
70:1 PWM Decoded From Phase Dimmer
Analog Dimming
Programmable Dimming Range
Digital Angle and Dimmer Detection
Dynamic Holding Current
Smooth Dimming Transitions
Low Power Operation
Start-Up Pre-Regulator Bias
Precision Voltage Reference The phase dimming decoder has several unique
features. The input-output mapping is programmable
for design flexibility, while a dynamic filter and
variable sampling rate provide smooth uniform …