LM3445MX/NOPB Texas Instruments - Yeehing Electronics

Triac dimmable offline LED driver

Pricing (USD)

Quantity	Unit Price
1 — 99	0.672
100 — 249	0.555
250 — 999	0.399
1,000 +	0.24

The above prices are for reference only.

Specifications

Manufacturer	Texas Instruments
Product Category	LED Lighting Drivers
RoHS	Y
Minimum Operating Temperature	- 40 C
Maximum Operating Temperature	+ 125 C
Mounting Style	SMD/SMT
Package / Case	SOIC-14
Series	LM3445
Packaging	Reel
Features	Adjustable Switch Frequency, Enable/Shutdown, Thermal Shutdown
Operating Temperature Range	- 40 C to + 125 C
Brand	Texas Instruments
Dimming	Forward Phase (Triac),PWM,Reverse Phase
Product Type	LED Lighting Drivers
Factory Pack Quantity	2500
Subcategory	Driver ICs
Unit Weight	0.011923 oz

For more information, please refer to datasheet

Documents

LM3445MX/NOPB Datasheet

More Information

The LM3445 is an adaptive constant off-time AC/DC buck (step-down) constant current controller designed to be compatible with TRIAC dimmers. The LM3445 provides a constant current for illuminating high power LEDs and includes a TRIAC dim decoder. The dim decoder allows wide range LED dimming using standard TRIAC dimmers. The high frequency capable architecture allows the use of small external passive components. The LM3445 includes a bleeder circuit to ensure proper TRIAC operation by allowing current flow while the line voltage is low to enable proper firing of the TRIAC. A passive PFC circuit ensures good power factor by drawing current directly from the line for most of the cycle, and provides a constant positive voltage to the buck regulator. Additional features include thermal shutdown, current limit and VCC under-voltage lockout.