LB1947VC-XE Equivalent & Substitute Parts

Part Overview

The LB1947VC-XE is a brushed DC motor driver IC manufactured by onsemi, designed for general-purpose motor control applications. It integrates both control and power stage functionality in a 15-HZIP package with a supply voltage range of 4.75V to 5.25V and load voltage capability of 10V to 45V. The product is currently classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and new design implementations.

Substiute Parts

LB1947VC-XE

onsemiIn Stock: 1214LB1947VC-XE Datasheet

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SLA7029M

Sanken Electric USA Inc.In Stock: 3324SLA7029M Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the LB1947VC-XE is constrained by the following critical parameters:

• Output Configuration: Half Bridge (2) topology is mandatory for functional equivalence
• Interface Type: Parallel control interface required
• Mounting Type: Through Hole package required for mechanical compatibility
• Fully Integrated Function: Both control and power stage must be integrated within the IC
• Motor Driver Category: Must be classified as a motor driver IC with power stage capability

The SLA7029M from Sanken Electric USA Inc. shares the half-bridge output configuration, parallel interface, through-hole mounting, and fully integrated control and power stage. However, critical differences exist in motor type classification, supply voltage range, and output current rating that must be evaluated for specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

The LB1947VC-XE is obsolete, requiring substitution for new procurements and ongoing system support. The SLA7029M is an active product with current manufacturing availability.

Selection between these parts must account for the following provided specifications:

• Supply Voltage Compatibility: The LB1947VC-XE operates at 4.75V ~ 5.25V, while the SLA7029M requires 10V ~ 44V. Applications operating at the LB1947VC-XE supply voltage range cannot directly use the SLA7029M without external voltage regulation.

• Output Current Rating: The LB1947VC-XE provides 2A output current; the SLA7029M provides 1.5A. Applications requiring the full 2A output capability may exceed the SLA7029M rating.

• Motor Type Classification: The LB1947VC-XE is specified for brushed DC motors, while the SLA7029M is specified for unipolar stepper motors. These represent different motor control architectures and control signal requirements.

• Package Compatibility: Both use 15-pin through-hole packages with exposed pads/tabs. Physical footprint verification is required, as the SSIP and SIP variants may have dimensional differences.

• Compliance Status: The SLA7029M carries RoHS Compliant certification; the LB1947VC-XE status is not specified. Both are REACH Unaffected and carry EAR99 ECCN classification.

Direct substitution is not recommended without application-specific validation of supply voltage, output current requirements, and motor control architecture compatibility.

Frequently Asked Questions (FAQ)

Q: Can the SLA7029M directly replace the LB1947VC-XE in existing designs?

A: Direct replacement is not supported without design modification. The SLA7029M requires a minimum supply voltage of 10V, while the LB1947VC-XE operates at 4.75V ~ 5.25V. Additionally, the SLA7029M is specified for unipolar stepper motor control, whereas the LB1947VC-XE is specified for brushed DC motor control. These differences require circuit redesign and control signal modification.

Q: What are the key differences in output current capability?

A: The LB1947VC-XE provides 2A output current per half-bridge, while the SLA7029M provides 1.5A. Applications requiring sustained 2A output cannot use the SLA7029M without exceeding its rated current specification.

Q: Are the 15-HZIP and 15-ZIP packages mechanically compatible?

A: Both are 15-pin through-hole packages with formed leads. However, SSIP (15-SSIP) and SIP (15-SIP) variants may have different pin spacing, lead geometry, or exposed pad/tab configurations. Physical footprint verification against component datasheets is required before PCB layout commitment.

Q: What compliance certifications apply to substitution decisions?

A: The SLA7029M is RoHS Compliant. Both parts are REACH Unaffected and carry EAR99 ECCN classification. Compliance requirements for the target application must be verified against the SLA7029M certifications.

Q: Is the SLA7029M suitable for general-purpose motor driver applications?

A: The SLA7029M is specified for unipolar stepper motor control, which is a specific motor type with distinct control requirements. General-purpose brushed DC motor applications require a driver specified for that motor type. The SLA7029M may not provide the control functionality required for brushed DC motor operation.