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Product Detailed Parameters
- Description：IC LED DRIVER OFFL TRIAC 14SOIC
- Series：-
- Mfr：Texas Instruments
- Package：Tube
- Type：AC DC Offline Switcher
- Topology：Step-Down (Buck)
- Internal Switch(s)：No
- Number of Outputs：1
- Voltage - Supply (Min)：8V
- Voltage - Supply (Max)：12V
- Voltage - Output：-
- Current - Output / Channel：-
- Frequency：30kHz ~ 1MHz
- Dimming：Triac
- Applications：Lighting
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：14-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：14-SOIC
- Grade：-
- Qualification：-
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Overview
The LM3445M/NOPB is a Triac-dimmable, off-line LED driver IC manufactured by Texas Instruments. It operates within an input voltage range of 8 V to 12 V and delivers a maximum output current of 1 A. The device utilizes a buck topology and supports adjustable switching frequencies between 30 kHz and 1 MHz. It features forward phase (Triac), PWM, and reverse phase dimming capabilities. The component is housed in a 14-pin SOIC package and functions reliably across temperatures from -40 °C to +125 °C.
Feature Summary
- Supports Triac, PWM, and reverse phase dimming for versatile lighting control
- Integrates thermal shutdown protection for enhanced operational safety
- Features adjustable switch frequency to optimize electromagnetic interference performance
Applications
- Commercial lighting systems
- Industrial lighting fixtures
- Residential solid-state lighting applications
Procurement Notes
Verify the specific suffix against official manufacturer documentation to confirm pinout compatibility and electrical specifications. Ensure the selected variant matches the required operating temperature range and packaging format for your design. Cross-reference the datasheet revision history to validate feature availability and manufacturing status before finalizing procurement plans.
Selection Notes
Select this component for designs requiring integrated Triac dimming without external controllers. Evaluate the 1 A output current capability against load requirements. Confirm that the SOIC-14 package fits the PCB layout constraints. Verify that the 8 V to 12 V input range aligns with the system's power supply architecture.
Part Context
This part belongs to the LM3445 series of constant-current LED drivers designed for high-efficiency AC/DC conversion. It integrates the power switch and control logic into a single compact package. The series targets cost-sensitive, high-volume lighting applications where reliable dimming performance and thermal management are critical design parameters.
Replacement Considerations
Consult official substitution guides for verified equivalents. Generic replacements may lack specific Triac dimming characteristics or thermal protection features. Validate pin-to-pin compatibility and electrical parameter alignment with the original datasheet before implementation.
FAQ
What dimming methods does the LM3445M/NOPB support?
It supports forward phase (Triac), PWM, and reverse phase dimming.
What is the operating temperature range for this IC?
The device operates from -40 °C to +125 °C.
