UCC2802N Equivalent & Substitute Parts

Part Overview

The UCC2802N is a PWM controller IC designed for offline switching power supply applications, manufactured by Texas Instruments in an 8-PDIP through-hole package. This part is classified as obsolete, making equivalent and substitute parts necessary for new designs and production continuity. The UCC2802N operates as a power management controller with input voltage range of -0.3V to 6.3V and supply voltage of 8.3V to 11V, delivering 500 µA supply current across an operating temperature range of -40°C to 125°C.

Substiute Parts

UCC2802N

Texas InstrumentsIn Stock: 2608UCC2802N Datasheet

Current PartRFQ

UCC2802D

Texas InstrumentsIn Stock: 992874UCC2802D Datasheet

MFR RecommendedRFQ

UC2842BN

STMicroelectronicsIn Stock: 2676UC2842BN Datasheet

MFR RecommendedRFQ

UC2843BN

STMicroelectronicsIn Stock: 20539UC2843BN Datasheet

MFR RecommendedRFQ

UC3842BN

STMicroelectronicsIn Stock: 55131UC3842BN Datasheet

MFR RecommendedRFQ

UC3843BN

STMicroelectronicsIn Stock: 60377UC3843BN Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the UCC2802N is determined by the following critical parameters:

• Functional Equivalence: All substitute parts operate as PWM controllers for power supply applications
• Electrical Compatibility: Input voltage range (-0.3V ~ 6.3V), supply voltage range (8.3V ~ 11V minimum), and supply current (500 µA) must be maintained or exceeded
• Package Compatibility: Through-hole 8-DIP package format ensures mechanical and electrical pin compatibility
• Operating Temperature Range: Minimum -40°C to 125°C coverage required for industrial applications
• Compliance Standards: ROHS3 compliance and MSL Level 1 rating maintained across all substitutes

The substitute parts are grouped into two categories: direct package equivalents (8-PDIP through-hole) and surface-mount alternatives (8-SOIC). The UCC2802D represents the manufacturer-recommended direct successor with identical electrical specifications but surface-mount packaging. The UC2842BN, UC2843BN, UC3842BN, and UC3843BN are functionally equivalent PWM controllers from STMicroelectronics with compatible electrical parameters and through-hole packaging.

Parameter Comparison

Engineering Selection Recommendations

For Through-Hole PCB Designs: The UC2842BN, UC2843BN, UC3842BN, and UC3843BN are direct mechanical replacements for the UCC2802N, maintaining the 8-DIP package format. All substitute parts are active products with current manufacturing support and ROHS3 compliance. The UC2843BN and UC3843BN offer lower minimum supply voltage (7.6V) compared to UC2842BN and UC3842BN (10V minimum), providing broader operational flexibility in designs with lower supply rails.

For Surface-Mount Designs: The UCC2802D is the manufacturer-recommended successor, offering identical electrical specifications to the UCC2802N with surface-mount 8-SOIC packaging. This part is the preferred choice for new designs requiring the same functional performance with modern assembly methods.

Temperature Considerations: The UCC2802N and UCC2802D support the widest operating temperature range (-40°C to 125°C). The STMicroelectronics alternatives (UC2842BN, UC2843BN) support -25°C to 85°C, while UC3842BN and UC3843BN support 0°C to 70°C. Design applications requiring full -40°C to 125°C coverage should prioritize the UCC2802D or verify temperature requirements against substitute specifications.

Supply Voltage Range: The UCC2802N operates within 8.3V to 11V. The STMicroelectronics substitutes support extended supply voltage ranges (7.6V to 30V or 10V to 30V), allowing operation in designs with higher supply voltages while maintaining compatibility with the original specification minimum.

Frequently Asked Questions (FAQ)

Q: Can the UCC2802D replace the UCC2802N in existing through-hole PCB designs?

A: No. The UCC2802D uses 8-SOIC surface-mount packaging, while the UCC2802N uses 8-PDIP through-hole packaging. PCB layout and assembly methods differ significantly. For through-hole designs, use UC2842BN, UC2843BN, UC3842BN, or UC3843BN instead.

Q: What is the primary difference between UC2842BN/UC3842BN and UC2843BN/UC3843BN?

A: The UC2843BN and UC3843BN support a lower minimum supply voltage of 7.6V, compared to 10V for UC2842BN and UC3842BN. Both pairs support identical maximum supply voltage (30V) and switching frequency (500kHz). Select based on your design's minimum supply voltage requirement.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The UCC2802N and all listed substitute parts (UCC2802D, UC2842BN, UC2843BN, UC3842BN, UC3843BN) are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited), meeting environmental and regulatory requirements.

Q: Which substitute part should I use for a new design?

A: For new through-hole designs, UC2843BN or UC3843BN are recommended due to their lower minimum supply voltage (7.6V) and active product status. For new surface-mount designs, use UCC2802D as the manufacturer-recommended successor. Verify operating temperature requirements match your application.

Q: Can I use UC3842BN or UC3843BN in applications requiring -40°C operation?

A: No. UC3842BN and UC3843BN support only 0°C to 70°C operating temperature range. For applications requiring -40°C minimum operation, use UC2842BN, UC2843BN, or UCC2802D instead.

Q: Is the UCC2802N still available for purchase?

A: The UCC2802N is classified as obsolete. Active substitute parts with current manufacturing support are recommended for new designs and production continuity.