UCC3911DP-3 Equivalent & Substitute Parts

Part Overview

The UCC3911DP-3 is a Battery Protection IC for Lithium Ion/Polymer applications, designed to protect 2-cell battery packs from over-voltage, under-voltage, and short-circuit faults. This component is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. The part is housed in a 16-SOIC surface mount package and operates across a temperature range of -20°C to 70°C.

Substiute Parts

UCC3911DP-3

Texas InstrumentsIn Stock: 1118UCC3911DP-3 Datasheet

Current PartRFQ

BQ294702DSGR

Texas InstrumentsIn Stock: 28206BQ294702DSGR Datasheet

MFR RecommendedRFQ

S-8252AAB-M6T1U

ABLIC Inc.In Stock: 4334S-8252AAB-M6T1U Datasheet

MFR RecommendedRFQ

S-8252ABQ-M6T1U

ABLIC Inc.In Stock: 905S-8252ABQ-M6T1U Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the UCC3911DP-3 are identified based on the following critical parameters:

• Battery Chemistry: Lithium Ion/Polymer compatibility
• Number of Cells: 2-cell protection capability
• Fault Protection: Over-voltage and short-circuit protection functions
• Mounting Type: Surface mount technology
• RoHS Compliance: ROHS3 Compliant status
• Operating Temperature Range: Functional overlap with original specifications

The substitute parts listed below maintain compatibility with 2-cell lithium ion/polymer battery applications. However, differences in package type, cell range capability, and fault protection features create distinct substitution scenarios.

Parameter Comparison

Engineering Selection Recommendations

BQ294702DSGR (Texas Instruments): This part maintains manufacturer continuity with Texas Instruments and is in active production status. It supports 2 to 4-cell configurations, extending application flexibility beyond the original 2-cell limitation. The operating temperature range of -40°C to 110°C exceeds the original specification. Package change from 16-SOIC to 8-WFDFN requires PCB layout modification. Fault protection is limited to over-voltage only, excluding under-voltage and short-circuit protection present in the original design.

S-8252AAB-M6T1U and S-8252ABQ-M6T1U (ABLIC Inc.): Both parts are active production components with identical electrical specifications for 2-cell lithium ion/polymer applications. The SOT-23-6 package represents a significant size reduction compared to the 16-SOIC original, requiring PCB redesign. Operating temperature range of -40°C to 85°C provides extended low-temperature performance. Fault protection focuses on over-current rather than over/under-voltage and short-circuit. MSL rating of 1 (Unlimited) provides superior moisture handling compared to the original MSL 2 specification.

All substitute parts maintain ROHS3 compliance and are suitable for new design implementations where the original UCC3911DP-3 is no longer available.

Frequently Asked Questions (FAQ)

Q: Can BQ294702DSGR directly replace UCC3911DP-3 in existing designs?

A: Direct replacement requires PCB layout modification due to package change from 16-SOIC to 8-WFDFN. Additionally, fault protection differs: BQ294702DSGR provides over-voltage protection only, while UCC3911DP-3 includes over/under-voltage and short-circuit protection. Circuit-level evaluation is necessary.

Q: What are the key differences between S-8252AAB-M6T1U and S-8252ABQ-M6T1U?

A: Both parts share identical electrical specifications for 2-cell lithium ion/polymer battery protection with over-current fault detection. The primary difference is inventory availability and supplier designation. Both use SOT-23-6 packaging and are suitable for equivalent applications.

Q: Why does BQ294702DSGR support 2 to 4-cell configurations while UCC3911DP-3 is limited to 2 cells?

A: The BQ294702DSGR is designed with broader application scope. For 2-cell applications, it operates within the same functional parameters as the original part. The extended cell range does not affect 2-cell battery pack compatibility.

Q: Are package changes critical for substitution?

A: Yes. UCC3911DP-3 uses 16-SOIC packaging, while ABLIC alternatives use SOT-23-6 and the Texas Instruments alternative uses 8-WFDFN. Each package change requires PCB footprint redesign, trace routing modifications, and thermal management re-evaluation.

Q: How do fault protection differences affect substitution suitability?

A: The original UCC3911DP-3 provides over/under-voltage and short-circuit protection. BQ294702DSGR provides over-voltage only. ABLIC parts provide over-current protection. Application requirements determine which protection feature set is necessary. Designs relying on under-voltage or short-circuit detection cannot use parts lacking these functions without additional external circuitry.

Q: What is the significance of MSL rating differences?

A: UCC3911DP-3 has MSL 2 (1 Year), requiring controlled storage and handling. All substitute parts have MSL 1 (Unlimited), eliminating moisture sensitivity constraints and reducing supply chain complexity for long-term inventory management.