LM2794TLX LED Driver IC Equivalent & Substitute Parts

Part Overview

The LM2794TLX is a 4-output LED driver IC manufactured by Texas Instruments, featuring a switched capacitor (charge pump) topology for backlight applications. This device operates across a 2.7V to 5.5V supply range with 20mA per-channel output capability and supports both analog and PWM dimming control at 515kHz switching frequency. The part is classified as obsolete, necessitating identification of active equivalent and substitute components for new designs and ongoing production support.

Substiute Parts

LM2794TLX

Texas InstrumentsIn Stock: 41439LM2794TLX Datasheet

Current PartRFQ

LM2794TL/NOPB

Texas InstrumentsIn Stock: 3104LM2794TL/NOPB Datasheet

Parametric EquivalentRFQ

MAX8822ETE+

Analog Devices Inc./Maxim IntegratedIn Stock: 822MAX8822ETE+ Datasheet

MFR RecommendedRFQ

MAX8822ETE+T

Analog Devices Inc./Maxim IntegratedIn Stock: 1149MAX8822ETE+T Datasheet

MFR RecommendedRFQ

MP3384EQ-LF-P

Monolithic Power Systems Inc.In Stock: 1019MP3384EQ-LF-P Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM2794TLX is determined by the following critical parameters: topology type (switched capacitor charge pump vs. step-up boost), number of outputs (4-channel requirement), supply voltage range compatibility (2.7V to 5.5V minimum), output voltage specification, per-channel current capacity, dimming control method, and package form factor. Parts are grouped into two categories:

Parametric Equivalents maintain identical or superior electrical specifications within the same topology family, ensuring direct functional replacement with minimal or no circuit redesign.

Manufacturer-Recommended Substitutes offer alternative topologies or enhanced specifications that satisfy the core application requirements (4-output LED driver for backlight) but may require circuit evaluation due to differences in voltage output, current capacity, switching frequency, or package configuration.

Parameter Comparison

Engineering Selection Recommendations

LM2794TL/NOPB is the primary parametric equivalent for direct replacement of the obsolete LM2794TLX. This part maintains identical electrical specifications (supply range, output voltage, per-channel current, switching frequency, and dual dimming control) and package configuration while offering active product status and RoHS3 compliance. Tape & Reel packaging is available for production environments.

MAX8822ETE+T is an active manufacturer-recommended substitute from Analog Devices Inc./Maxim Integrated. While maintaining the same supply voltage range and 4-output configuration, this part delivers 24mA per-channel (versus 20mA) and operates at 1MHz switching frequency. The output voltage is specified at 5V rather than 3.8V, and dimming control is limited to PWM only. Package form factor changes from 14-DSBGA to 16-TQFN (3x3), requiring PCB layout modification. RoHS3 compliance is confirmed.

MP3384EQ-LF-P is a manufacturer-recommended substitute from Monolithic Power Systems Inc. with active inventory but classified as "Not For New Designs." This part employs a step-up (boost) topology rather than charge pump, with significantly different electrical specifications: 4.5V to 25V supply range, 50V output voltage, and 40mA per-channel current. Operating temperature extends to 125°C. This substitute is suitable only for applications requiring higher output voltage and current capacity with boost topology characteristics. RoHS3 compliance is confirmed.

Frequently Asked Questions (FAQ)

Q: Can LM2794TL/NOPB directly replace LM2794TLX without circuit modification?

A: Yes. LM2794TL/NOPB maintains identical electrical specifications and package configuration. The primary difference is product status (active vs. obsolete) and RoHS compliance level. No circuit redesign is required for direct substitution.

Q: What are the key differences between LM2794TL/NOPB and MAX8822ETE+T?

A: Both maintain the same supply voltage range (2.7V to 5.5V) and 4-output configuration. MAX8822ETE+T offers higher per-channel current (24mA vs. 20mA) and faster switching frequency (1MHz vs. 515kHz). Output voltage differs (5V vs. 3.8V), and dimming control is PWM-only rather than dual analog/PWM. Package changes from 14-DSBGA to 16-TQFN (3x3), requiring PCB layout evaluation.

Q: Is MP3384EQ-LF-P suitable as a direct replacement?

A: No. MP3384EQ-LF-P employs a fundamentally different topology (step-up boost vs. charge pump) with incompatible electrical specifications. Supply voltage range (4.5V to 25V) and output voltage (50V) are substantially different from the LM2794TLX. This substitute is applicable only to applications requiring boost topology characteristics and higher output voltage.

Q: What packaging options are available for equivalent parts?

A: LM2794TL/NOPB is available in Tape & Reel (TR) packaging for production environments. MAX8822ETE+T is also available in Tape & Reel. Both maintain surface mount mounting type. Package footprints differ: LM2794TL/NOPB uses 14-DSBGA, while MAX8822ETE+T uses 16-TQFN (3x3).

Q: Are all substitute parts RoHS3 compliant?

A: LM2794TL/NOPB, MAX8822ETE+T, and MP3384EQ-LF-P are all RoHS3 compliant. The original LM2794TLX is RoHS non-compliant. Compliance verification is required if regulatory requirements mandate RoHS certification.

Q: What is the inventory status for these parts?

A: LM2794TLX has 41,400 pieces in stock (new original). LM2794TL/NOPB has 3,075 pieces available. MAX8822ETE+T has 1,054 pieces in Tape & Reel. MP3384EQ-LF-P has 977 pieces available. Inventory levels should be verified with suppliers for current availability.