Texas Instruments LM3450
the LM3450 with the exception of one circuit operation. The dynamic hold current is sampled in the LM3450 while it continuously operates in the LM3450A. This difference between the two devices defines the suitable applications for each.| Part No. | LM3450 |
|---|---|
| Datasheet | LM3450 Download |
| Manufacturer |  Texas Instruments |
| Description | LED Drivers |
| Buy | Stock & Price |
FEATURES
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
APPLICATIONS
● Dimmable Downlights, Troffers, and Lowbays● Large Form Factor Bulbs
● Indoor and Outdoor Area SSL
● Power Supply PFC
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. 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 dimming.
