LM3445M/NOPB Texas Instruments - Yeehing Electronics

Triac dimmable offline LED driver

Pricing (USD)

Quantity	Unit Price
1 — 99	0.806
100 — 249	0.666
250 — 999	0.478
1,000 +	0.25

The above prices are for reference only.

Specifications

Manufacturer	Texas Instruments
Product Category	LED Lighting Drivers
RoHS	Y
Number of Channels	1 Channel
Output Current	1 A
Input Voltage	8 V to 12 V
Operating Frequency	30 kHz to 1 MHz
Supply Current - Max	2850 uA
Minimum Operating Temperature	- 40 C
Maximum Operating Temperature	+ 125 C
Mounting Style	SMD/SMT
Package / Case	SOIC-14
Series	LM3445
Packaging	Tube
Features	Adjustable Switch Frequency, Enable/Shutdown, Thermal Shutdown
Height	1.45 mm
Length	8.64 mm
Operating Temperature Range	- 40 C to + 125 C
Output Type	Constant Current
Type	Inductive
Width	3.91 mm
Brand	Texas Instruments
Topology	Buck
Dimming	Forward Phase (Triac),PWM,Reverse Phase
Product Type	LED Lighting Drivers
Factory Pack Quantity	55
Subcategory	Driver ICs
Unit Weight	0.011923 oz

For more information, please refer to datasheet

Documents

LM3445M/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.