LP3954TLX/NOPB LED Driver IC Equivalent & Substitute Parts

Part Overview

The LP3954TLX/NOPB is an active LED driver IC manufactured by Texas Instruments, designed for advanced lighting management applications. This 36-DSBGA packaged component functions as a DC-DC regulator with step-up (boost) topology, delivering 13 independent outputs with PWM dimming capability. The device is commonly used in backlight and camera flash applications where multiple LED channels require synchronized control and regulated power delivery.

Substitute parts are identified when equivalent electrical performance, output configuration, and thermal operating range are maintained across the same package footprint and supplier specifications.

Substiute Parts

LP3954TLX/NOPB

Texas InstrumentsIn Stock: 2491LP3954TLX/NOPB Datasheet

Current PartRFQ

LP3954TL/NOPB

National SemiconductorIn Stock: 4286LP3954TL/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LP3954TLX/NOPB are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Critical Matching Parameters:

• DC-DC regulator topology (Step-Up/Boost configuration)
• Number of LED driver outputs (13 channels)
• Input voltage range (3V to 5.5V minimum)
• Output voltage range (4V to 5.3V minimum)
• Per-channel current capability (900mA switch current minimum)
• Switching frequency (2MHz)
• PWM dimming control functionality
• Operating temperature range (-30°C to 85°C minimum)
• Package footprint (36-DSBGA)
• Surface mount compatibility

The LP3954TL/NOPB qualifies as a parametric equivalent because it maintains all critical electrical specifications, output configuration, thermal performance, and physical package requirements identical to the main part number.

Parameter Comparison

Engineering Selection Recommendations

Both the LP3954TLX/NOPB and LP3954TL/NOPB are active products with identical electrical specifications and package requirements. Selection between these parts should be based on:

Availability and Lead Time: The LP3954TL/NOPB currently maintains higher inventory (4188 pcs) compared to the LP3954TLX/NOPB (2400 pcs), which may influence procurement decisions for high-volume applications.

Packaging Format: The LP3954TLX/NOPB is supplied in Tape & Reel format, suitable for automated assembly processes. The LP3954TL/NOPB is supplied in Bulk packaging, which may require manual handling or reeling for automated placement equipment.

Compliance Status: Both parts maintain ROHS3 compliance and EAR99 export classification. Both are unaffected by REACH regulations.

Thermal and Electrical Performance: No performance differentiation exists between the two parts. Both operate across the full -30°C to 85°C temperature range and deliver identical electrical characteristics for all 13 output channels.

Frequently Asked Questions (FAQ)

Q: Can the LP3954TL/NOPB directly replace the LP3954TLX/NOPB in existing designs?

A: Yes. Both parts are electrically and mechanically identical. The 36-DSBGA package footprint, pin configuration, and electrical performance are equivalent. PCB layout and schematic connections require no modification.

Q: What is the difference between the TLX and TL suffixes?

A: The suffix designates packaging format. TLX indicates Tape & Reel packaging for automated assembly. TL indicates Bulk packaging. The core silicon and electrical specifications are identical.

Q: Are there any thermal performance differences between these parts?

A: No. Both parts operate across the identical temperature range (-30°C to 85°C) and maintain the same thermal characteristics. Thermal management requirements and PCB design considerations remain unchanged.

Q: Can I use the LP3954TL/NOPB in a design originally specified for LP3954TLX/NOPB?

A: Yes, provided your assembly process can accommodate Bulk packaging. If your manufacturing line requires Tape & Reel format, the LP3954TL/NOPB will require reeling or manual handling, which may increase labor costs.

Q: Do both parts support the same PWM dimming frequency and control interface?

A: Yes. Both parts implement identical PWM dimming control at 2MHz switching frequency. Control signal timing, duty cycle range, and dimming resolution are equivalent.

Q: What applications are these parts suitable for?

A: Both parts are designed for backlight and camera flash applications requiring multi-channel LED driver functionality with synchronized PWM control and regulated boost conversion.

Q: Are there any compliance or export restrictions?

A: Both parts carry EAR99 classification and are ROHS3 compliant. Neither part is affected by REACH regulations. Standard export documentation applies.