TL2842BD Equivalent & Substitute Parts

Part Overview

The TL2842BD is a boost, flyback, and forward regulator controller IC manufactured by Texas Instruments, designed for positive output step-up and step-up/step-down DC-DC conversion applications. This device operates as a transistor driver with frequency control capabilities across a 10V to 30V supply range. The TL2842BD is currently in Last Time Buy status, indicating end-of-life production. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for new production runs and long-term support.

Substiute Parts

TL2842BD

Texas InstrumentsIn Stock: 1811TL2842BD Datasheet

Current PartRFQ

TL2842BDR

Texas InstrumentsIn Stock: 4784TL2842BDR Datasheet

MFR RecommendedRFQ

UC2842AD

UnitrodeIn Stock: 1409UC2842AD Datasheet

MFR RecommendedRFQ

UC2842BDG

onsemiIn Stock: 3701UC2842BDG Datasheet

MFR RecommendedRFQ

UC2842BDR2G

onsemiIn Stock: 6931UC2842BDR2G Datasheet

MFR RecommendedRFQ

TL2842D

Texas InstrumentsIn Stock: 1931TL2842D Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TL2842BD are classified based on strict parameter alignment across the following critical criteria:

Substitution-Determining Parameters:

• Package / Case: 14-SOIC (0.154", 3.90mm Width)
• Voltage - Supply (Vcc/Vdd): 10V ~ 30V
• Frequency - Switching: Up to 500kHz
• Duty Cycle (Max): 96% or higher
• Output Type: Transistor Driver
• Topology: Boost, Flyback (minimum requirement)
• Operating Temperature: -40°C ~ 85°C or wider range
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant

Substitute Categories:

1. MFR Recommended Substitutes – Direct replacements with identical or superior specifications, active product status preferred
2. Parametric Equivalents – Parts meeting all critical electrical and mechanical parameters, may have different product status or packaging

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: TL2842BDR

TL2842BDR is the preferred substitute for TL2842BD. Both parts are manufactured by Texas Instruments with identical electrical specifications, package configuration, and operating temperature range. The primary difference is packaging format: TL2842BDR is supplied in Tape & Reel (TR) format versus Tube for the original part. TL2842BDR maintains Active product status, ensuring long-term availability and supply chain stability. ROHS3 compliance and MSL 1 rating are identical.

Secondary Recommendation: UC2842BDR2G

UC2842BDR2G, manufactured by onsemi, meets all critical electrical and mechanical substitution parameters. This part operates within the same 10V to 30V supply range, supports up to 500kHz switching frequency, and maintains 96% maximum duty cycle. The device is supplied in Tape & Reel format with Active product status. Operating temperature range is -25°C to 85°C, which is narrower than the original part's -40°C to 85°C specification. This substitution is suitable for applications not requiring extended low-temperature operation below -25°C.

Tertiary Recommendation: UC2842AD

UC2842AD, manufactured by Unitrode, provides parametric equivalence with Active product status. This part maintains the 14-SOIC package and -40°C to 85°C operating temperature range. Detailed switching frequency and duty cycle specifications are not provided in the available data. This part is suitable when packaging format flexibility is acceptable.

Not Recommended: UC2842BDG

UC2842BDG carries Obsolete product status, indicating discontinued production and limited future availability. While electrical parameters align with substitution criteria, the obsolete designation makes this part unsuitable for new designs or long-term production support.

Parametric Equivalent: TL2842D

TL2842D is a parametric equivalent with Last Time Buy status, similar to the original TL2842BD. This part offers marginally higher maximum duty cycle (97% versus 96%) and identical operating temperature range. However, Moisture Sensitivity Level is rated at 2 (1 Year) versus MSL 1 (Unlimited) for the original part, indicating more stringent handling requirements. This part is suitable only when TL2842BDR is unavailable.

Frequently Asked Questions (FAQ)

Q: Can TL2842BDR be used as a direct drop-in replacement for TL2842BD?

A: Yes. TL2842BDR is electrically and mechanically identical to TL2842BD. The only difference is packaging format (Tape & Reel versus Tube). Both parts share the same 14-SOIC package footprint, electrical specifications, and operating characteristics. No circuit modifications are required.

Q: What is the difference between Tube and Tape & Reel packaging?

A: Tube packaging supplies components in plastic tubes suitable for manual handling and small-quantity applications. Tape & Reel packaging supplies components on continuous tape wound on reels, optimized for automated assembly equipment. Both formats contain identical components; the difference is in delivery and handling method.

Q: Why is UC2842BDR2G listed as a substitute if it has a narrower operating temperature range?

A: UC2842BDR2G meets all critical electrical and mechanical substitution parameters required for boost, flyback, and forward regulator applications. The operating temperature range of -25°C to 85°C is narrower than the original -40°C to 85°C specification. This part is suitable for applications operating within the -25°C to 85°C range. Applications requiring operation below -25°C must use TL2842BDR or TL2842D.

Q: Is UC2842BDG a viable substitute?

A: UC2842BDG meets all electrical and mechanical parameters but carries Obsolete product status. Obsolete parts have discontinued production and limited inventory availability. This part is not recommended for new designs or applications requiring long-term supply chain support.

Q: What does ROHS3 Compliant mean?

A: ROHS3 Compliant indicates the part meets Restriction of Hazardous Substances Directive 3 requirements, restricting the use of specific hazardous materials in electrical and electronic equipment. All recommended substitutes maintain ROHS3 compliance.

Q: What is Moisture Sensitivity Level (MSL)?

A: MSL indicates the maximum time a component can be stored in a non-controlled environment before soldering. MSL 1 (Unlimited) allows indefinite storage without special handling. MSL 2 (1 Year) requires storage in controlled humidity conditions and limits shelf life to one year. TL2842BDR and UC2842BDR2G have MSL 1 rating, providing superior storage flexibility compared to TL2842D with MSL 2 rating.

Q: Can I use TL2842D as a substitute?

A: TL2842D is a parametric equivalent meeting all critical electrical specifications. However, it carries Last Time Buy status like the original TL2842BD, indicating limited future availability. Additionally, MSL 2 rating requires more stringent storage conditions compared to MSL 1 parts. TL2842D is suitable only when TL2842BDR is unavailable and application requirements permit MSL 2 handling procedures.