LB11685VH-TLM-H Equivalent & Substitute Parts

Part Overview

The LB11685VH-TLM-H is a motor driver IC manufactured by onsemi, designed for brushless DC (BLDC) motor control applications. This integrated circuit combines control and power stage functionality in a 28-HSOP package, operating across a 4.5V to 18V supply range with 1.2A output current capability. The part is classified as obsolete, necessitating identification of equivalent alternatives for ongoing design support and production continuity.

Substiute Parts

LB11685VH-TLM-H

onsemiIn Stock: 3412LB11685VH-TLM-H Datasheet

Current PartRFQ

BA6840BFS-E2

Rohm SemiconductorIn Stock: 1713BA6840BFS-E2 Datasheet

SimilarRFQ

BA6859AFP-YE2

Rohm SemiconductorIn Stock: 16046BA6859AFP-YE2 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LB11685VH-TLM-H is determined by the following critical parameters:

• Motor type classification: Brushless DC (BLDC)
• Functional architecture: Fully integrated driver with control and power stage
• Output topology: Half Bridge (3) configuration
• Interface type: Parallel control
• Technology platform: Bipolar
• Mounting standard: Surface Mount

Substitute parts must maintain compatibility across these core functional and electrical characteristics. Voltage supply range, output current rating, and operating temperature range are secondary parameters that define application scope but do not preclude substitution when the primary functional parameters align.

Parameter Comparison

Engineering Selection Recommendations

BA6859AFP-YE2 (Rohm Semiconductor) shares the documented motor driver classification with the LB11685VH-TLM-H and carries ROHS3 compliance with unlimited moisture sensitivity rating. However, this part is designated "Not For New Designs," limiting its suitability for forward-looking applications despite functional alignment.

BA6840BFS-E2 (Rohm Semiconductor) maintains active product status and full ROHS3 compliance. This part demonstrates functional equivalence through half-bridge (3) output configuration, parallel interface, and bipolar technology. The 1.3A output current exceeds the original specification, and the 20-SOP package represents a different form factor requiring PCB layout modification. The restricted voltage supply range (4.25V ~ 5.5V) compared to the original 4.5V ~ 18V represents a narrower operational envelope suitable for lower-voltage applications.

Selection between these alternatives depends on application voltage requirements and design timeline constraints. BA6840BFS-E2 is recommended for new designs requiring active product support and compliance documentation.

Frequently Asked Questions (FAQ)

Q: Can BA6840BFS-E2 directly replace LB11685VH-TLM-H without circuit modification?

A: Functional substitution is possible based on shared BLDC driver architecture, half-bridge output configuration, and parallel interface. However, the different package form factor (20-SOP versus 28-LSOP) requires PCB layout redesign. The restricted supply voltage range (4.25V ~ 5.5V) necessitates verification that application voltage requirements fall within this narrower specification.

Q: What is the significance of the "Not For New Designs" status on BA6859AFP-YE2?

A: This designation indicates the manufacturer is not recommending this part for new product development. While functional equivalence exists, design teams should prioritize BA6840BFS-E2 for new applications to ensure long-term supply availability and manufacturer support.

Q: How do the moisture sensitivity levels affect component handling?

A: LB11685VH-TLM-H carries MSL 3 (168 hours), requiring controlled storage and limited floor life after packaging opening. Both substitute parts carry MSL 1 (unlimited), eliminating time-sensitive handling constraints and reducing production logistics complexity.

Q: Are there package compatibility considerations for PCB redesign?

A: Yes. LB11685VH-TLM-H uses 28-LSOP with heat tabs; BA6840BFS-E2 uses 20-SOP. The pin count reduction and different thermal management approach require schematic and layout verification. BA6859AFP-YE2 uses 25-HSOP, also requiring layout modification but maintaining closer pin count proximity to the original.

Q: What compliance certifications apply to these substitute parts?

A: Both Rohm Semiconductor alternatives carry ROHS3 compliance and REACH Unaffected status, matching the regulatory framework of the original LB11685VH-TLM-H. All three parts share EAR99 ECCN classification and identical HTSUS commodity code (8542.39.0001).