UCC2802NG4 Equivalent & Substitute Parts

Part Overview

The UCC2802NG4 is a Power Management IC (PMIC) functioning as an offline switch PWM controller in 8-DIP through-hole packaging. Manufactured by Texas Instruments, this component is classified as obsolete, with 1103 units currently in stock. The UCC2802NG4 operates as a power supply controller for PWM applications requiring input voltage tolerance of -0.3V to 6.3V and supply voltage of 8.3V to 11V. Due to its obsolete status, equivalent substitute parts with active product status are necessary for new designs and long-term supply chain continuity.

Substiute Parts

UCC2802NG4

Texas InstrumentsIn Stock: 1157UCC2802NG4 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 UCC2802NG4 is determined by the following critical parameters:

Electrical Compatibility: Supply voltage range, input voltage tolerance, and current consumption must remain within or exceed the original specifications to ensure functional equivalence in PWM controller applications.

Package & Mounting: The original part uses 8-DIP through-hole packaging. Substitutes maintain this package type to ensure direct PCB compatibility without layout modifications.

Functional Classification: All substitutes operate as PWM controllers or boost/flyback regulators with comparable control features and switching frequency capabilities (up to 500kHz).

Compliance & Status: Substitutes must maintain ROHS3 compliance and preferably carry active product status for supply chain reliability.

The substitute parts are grouped into two categories:

1. Direct Package Match (8-DIP Through Hole): UC2842BN, UC2843BN, UC3842BN, UC3843BN
2. Package Variant (8-SOIC Surface Mount): UCC2802D

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Through-Hole PCB Layout):

UCC2802D is the manufacturer-recommended substitute from Texas Instruments, maintaining identical electrical specifications (8.3V ~ 11V supply, 500 µA current, -40°C ~ 125°C operating range) with active product status. However, this part requires surface-mount assembly capability, necessitating PCB layout modification.

UC2843BN and UC3843BN provide through-hole 8-DIP package compatibility with the original UCC2802NG4, eliminating layout changes. Both parts feature expanded supply voltage ranges (7.6V ~ 30V and 10V ~ 30V respectively) and active product status. UC2843BN operates across -25°C ~ 85°C, while UC3843BN operates across 0°C ~ 70°C. All STMicroelectronics substitutes maintain ROHS3 compliance and MSL-1 ratings.

UC2842BN offers similar through-hole compatibility with a 10V ~ 30V supply range and -25°C ~ 85°C operating temperature, providing broader environmental tolerance than UC3842BN.

For New Designs Prioritizing Supply Chain Continuity:

UC3843BN and UC3842BN demonstrate the highest inventory availability (60300 and 55100 units respectively), ensuring long-term procurement reliability. Both maintain active product status and full ROHS3 compliance.

Compliance Verification:

All substitute parts maintain ROHS3 compliance, MSL-1 moisture sensitivity rating, and REACH unaffected status, matching the original UCC2802NG4 certifications.

Frequently Asked Questions (FAQ)

Q: Can UCC2802D replace UCC2802NG4 directly on the PCB?

A: UCC2802D is electrically equivalent but requires surface-mount assembly. The original UCC2802NG4 uses 8-DIP through-hole packaging, while UCC2802D uses 8-SOIC surface-mount packaging. Direct PCB substitution is not possible without layout modification.

Q: Which substitute maintains the narrowest supply voltage specification?

A: UCC2802D maintains the original 8.3V ~ 11V supply voltage range. STMicroelectronics substitutes (UC2842BN, UC2843BN, UC3842BN, UC3843BN) feature expanded ranges from 7.6V to 30V, providing broader application flexibility but requiring circuit validation for the original design intent.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All substitute parts—UCC2802D, UC2842BN, UC2843BN, UC3842BN, and UC3843BN—maintain ROHS3 compliance and MSL-1 moisture sensitivity ratings identical to the original UCC2802NG4.

Q: What is the operating temperature difference between substitutes?

A: UCC2802NG4 and UCC2802D operate across -40°C ~ 125°C. UC2842BN and UC2843BN operate across -25°C ~ 85°C. UC3842BN and UC3843BN operate across 0°C ~ 70°C. Applications requiring the full -40°C ~ 125°C range should select UCC2802D or verify thermal requirements against the narrower ranges of STMicroelectronics alternatives.

Q: Which substitute offers the best inventory availability?

A: UC3843BN provides the highest inventory (60300 units), followed by UC3842BN (55100 units). Both ensure supply chain continuity for production environments.

Q: Can UC2842BN and UC2843BN be used interchangeably?

A: Both parts use 8-DIP through-hole packaging and support up to 500kHz switching frequency with 96% maximum duty cycle. UC2843BN operates at 7.6V ~ 30V supply voltage, while UC2842BN operates at 10V ~ 30V. Selection depends on the minimum supply voltage requirement of the application circuit.