TL2845DRG4 Equivalent & Substitute Parts

Part Overview

The TL2845DRG4 is a DC-DC controller IC from Texas Instruments designed for boost, flyback, and forward regulator topologies with positive output configuration. This part operates as a transistor driver for step-up and step-up/step-down applications. The TL2845DRG4 is currently discontinued at DiGi Electronics, making identification of functional equivalents essential for ongoing design support and production continuity. Substitute parts must maintain identical electrical specifications and package compatibility to ensure drop-in replacement capability.

Substiute Parts

TL2845DRG4

Texas InstrumentsIn Stock: 965TL2845DRG4 Datasheet

Current PartRFQ

TL2845BDR

Texas InstrumentsIn Stock: 3635TL2845BDR Datasheet

Parametric EquivalentRFQ

TL2845DR

Texas InstrumentsIn Stock: 5233TL2845DR Datasheet

Parametric EquivalentRFQ

UC2845BDG

onsemiIn Stock: 1762UC2845BDG Datasheet

MFR RecommendedRFQ

UC2845BDR2G

onsemiIn Stock: 3989UC2845BDR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TL2845DRG4 is determined by strict adherence to the following critical parameters:

Electrical Equivalence Requirements:

• Voltage supply range: 7.6V ~ 30V
• Switching frequency capability: Up to 500kHz
• Duty cycle maximum: 48%
• Output configuration: Positive
• Topology support: Boost, Flyback, Forward
• Control features: Frequency Control
• Number of outputs: 1
• Output phases: 1

Physical Compatibility Requirements:

• Package type: 14-SOIC (0.154", 3.90mm Width)
• Mounting type: Surface Mount
• Pin count and pinout: 14-pin SOIC

Compliance Requirements:

• RoHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

Substitute parts are grouped into two categories: Texas Instruments parametric equivalents (TL2845BDR, TL2845DR) and manufacturer-recommended alternatives from onsemi (UC2845BDG, UC2845BDR2G). All listed substitutes maintain identical electrical specifications and package compatibility with the TL2845DRG4.

Parameter Comparison

Engineering Selection Recommendations

Texas Instruments Parametric Equivalents (Primary Selection):

TL2845BDR and TL2845DR are direct parametric equivalents manufactured by Texas Instruments. Both parts maintain identical electrical specifications and operating temperature range (-40°C ~ 85°C) as the discontinued TL2845DRG4. TL2845BDR is packaged in Tape & Reel format with 3600 units in stock, while TL2845DR is supplied in Cut Tape & Digi-Reel format with 5161 units in stock. Both parts carry Active product status and ROHS3 compliance, ensuring long-term availability and regulatory alignment.

onsemi Manufacturer-Recommended Alternatives (Secondary Selection):

UC2845BDR2G is the recommended substitute from onsemi, maintaining all critical electrical parameters with Active product status and 3966 units in stock. This part is supplied in Tape & Reel packaging. UC2845BDG is also available but carries Obsolete product status, limiting its suitability for new designs despite 1688 units in inventory.

The onsemi UC2845 series parts include isolation-capable output configuration, which represents an additional capability beyond the TL2845DRG4 specification. Operating temperature range for onsemi parts is -25°C ~ 85°C, which is narrower than the TL2845 series. All substitute parts maintain identical package geometry, RoHS3 compliance, and MSL rating.

Recommended Priority Order:

1. TL2845DR (Texas Instruments, Active, highest inventory)
2. TL2845BDR (Texas Instruments, Active, Tape & Reel packaging)
3. UC2845BDR2G (onsemi, Active, manufacturer-recommended)

Frequently Asked Questions (FAQ)

Q: Can TL2845BDR and TL2845DR be used interchangeably with TL2845DRG4?

A: Yes. Both parts are parametric equivalents with identical electrical specifications, package type (14-SOIC), and operating characteristics. The primary difference is packaging format: TL2845BDR uses Tape & Reel, while TL2845DR uses Cut Tape & Digi-Reel. Both are electrically and mechanically compatible for direct substitution.

Q: What is the difference between Texas Instruments and onsemi substitute options?

A: Texas Instruments TL2845 series parts (TL2845BDR, TL2845DR) are parametric equivalents with identical topology support (Boost, Flyback, Forward) and operating temperature range (-40°C ~ 85°C). onsemi UC2845 series parts (UC2845BDR2G, UC2845BDG) support Boost and Flyback topologies with narrower operating temperature range (-25°C ~ 85°C) and include isolation-capable output configuration. For applications requiring Forward topology or extended low-temperature operation, Texas Instruments parts are required.

Q: Does the operating temperature difference between TL2845 and UC2845 series affect substitution?

A: The TL2845 series operates from -40°C to 85°C, while UC2845 series operates from -25°C to 85°C. If your application requires operation below -25°C, only TL2845 series parts are suitable. For applications within -25°C to 85°C range, both series are compatible.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts (TL2845BDR, TL2845DR, UC2845BDG, UC2845BDR2G) carry ROHS3 Compliant status with Moisture Sensitivity Level 1 (Unlimited), matching the original TL2845DRG4 specification.

Q: What packaging formats are available for substitute parts?

A: TL2845BDR is supplied in Tape & Reel (TR) format. TL2845DR is supplied in Cut Tape (CT) & Digi-Reel format. UC2845BDG is supplied in Tube format. UC2845BDR2G is supplied in Tape & Reel (TR) format. Select packaging based on your procurement and assembly requirements.

Q: Which substitute part has the best availability?

A: TL2845DR has the highest inventory at 5161 units in stock, followed by TL2845BDR with 3600 units and UC2845BDR2G with 3966 units. All three parts carry Active product status, ensuring continued availability.