LM2793LD/NOPB LED Driver IC Equivalent & Substitute Parts

Part Overview

The LM2793LD/NOPB is a LED Driver IC manufactured by Texas Instruments, classified as a Power Management (PMIC) device. This component functions as a 2-output DC DC regulator utilizing switched capacitor (charge pump) topology with PWM dimming capability, rated for 16mA output per channel. The device is currently listed as obsolete, making identification of functionally equivalent substitute parts essential for ongoing design support and production continuity.

Substiute Parts

LM2793LD/NOPB

Texas InstrumentsIn Stock: 799LM2793LD/NOPB Datasheet

Current PartRFQ

ISL97682IRTZ-TK

Renesas Electronics CorporationIn Stock: 2286ISL97682IRTZ-TK Datasheet

MFR RecommendedRFQ

LT3486EFE#PBF

Analog Devices Inc.In Stock: 3388LT3486EFE#PBF Datasheet

MFR RecommendedRFQ

LT3909EDD#PBF

Analog Devices Inc.In Stock: 2955LT3909EDD#PBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LM2793LD/NOPB are selected based on the following core substitution criteria:

Primary Functional Requirements:

• 2-output LED driver DC DC regulator topology
• PWM dimming control capability
• Surface mount packaging
• ROHS3 compliance
• Suitable for backlight applications

Electrical Compatibility Parameters:

• Supply voltage range overlap with original specification (2.7V–5.5V minimum requirement)
• Output channel configuration (2 outputs)
• Dimming methodology (PWM-based control)

Secondary Considerations:

• Current output capacity per channel (minimum 16mA requirement)
• Operating temperature range coverage
• Switching frequency (functional range 500kHz–2.2MHz acceptable)
• Moisture sensitivity level and thermal characteristics

The three substitute parts listed below meet these criteria through active product status and verified electrical parameter alignment, though each introduces topology or current rating variations that must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

ISL97682IRTZ-TK (Renesas Electronics)

This substitute provides active product status with 2-output LED driver functionality and PWM dimming control. The device operates within an extended supply voltage range (4V–26.5V) and delivers 100mA per channel, exceeding the original 16mA specification. The 16-TQFN package requires PCB layout modification compared to the 10-WSON original. MSL rating of 3 (168 hours) requires controlled moisture exposure during storage and assembly. ROHS3 compliance and EAR99 classification match the original specification.

LT3486EFE#PBF (Analog Devices Inc.)

This substitute offers active product status with 2-output LED driver topology and PWM dimming capability. Supply voltage range (2.5V–24V) provides lower minimum threshold than the original, with significantly higher current capacity (1.3A switch current). The 16-TSSOP-EP package differs from the original 10-WSON footprint. MSL rating of 1 (unlimited) provides superior moisture handling. Operating temperature maximum of 85°C matches the original. ROHS3 compliance and EAR99 classification are maintained.

LT3909EDD#PBF (Analog Devices Inc.)

This substitute provides active product status with automotive-grade qualification and extended operating temperature range (-40°C to 125°C). The 2-output LED driver supports both analog and PWM dimming control. Supply voltage range (2.9V–40V) and 50mA per channel output exceed original specifications. The 12-DFN (3x3) package maintains similar footprint dimensions to the original 10-WSON. MSL rating of 1 (unlimited) and ROHS3 compliance are provided. This device is suitable for applications requiring extended temperature performance.

Frequently Asked Questions (FAQ)

Q: Can the ISL97682IRTZ-TK directly replace the LM2793LD/NOPB without circuit modification?

A: The ISL97682IRTZ-TK provides equivalent 2-output LED driver functionality with PWM dimming, but the 16-TQFN package differs from the 10-WSON original. PCB layout redesign is required. Additionally, the minimum supply voltage is 4V versus 2.7V for the original, which may affect low-voltage applications.

Q: What is the primary difference between the LT3486EFE#PBF and LT3909EDD#PBF?

A: Both are Analog Devices LED driver ICs with 2-output configuration and PWM dimming. The LT3909EDD#PBF includes automotive-grade qualification and extended temperature range (-40°C to 125°C) versus the LT3486EFE#PBF standard range (-40°C to 85°C). The LT3909EDD#PBF also supports analog dimming in addition to PWM control.

Q: Does the higher current output rating of substitute parts affect compatibility?

A: Higher current ratings (100mA for ISL97682IRTZ-TK, 1.3A for LT3486EFE#PBF, 50mA for LT3909EDD#PBF) exceed the original 16mA specification and are compatible with applications designed for the LM2793LD/NOPB. Circuit design must ensure proper current limiting and thermal management for the selected substitute.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The LM2793LD/NOPB and all three substitute parts (ISL97682IRTZ-TK, LT3486EFE#PBF, LT3909EDD#PBF) are ROHS3 compliant with EAR99 export classification.

Q: What is the significance of MSL rating differences?

A: The LM2793LD/NOPB and LT3486EFE#PBF carry MSL 1 (unlimited moisture sensitivity), while the ISL97682IRTZ-TK carries MSL 3 (168 hours). MSL 3 requires controlled storage conditions and limits the time between package opening and soldering. LT3909EDD#PBF also carries MSL 1 rating.

Q: Which substitute is most suitable for low-voltage applications below 4V?

A: The LT3486EFE#PBF supports supply voltage as low as 2.5V, matching the original 2.7V minimum more closely than the ISL97682IRTZ-TK (4V minimum). The LT3909EDD#PBF operates from 2.9V, also suitable for low-voltage designs.