ICM7243BIPLZ LED Driver IC Equivalent & Substitute Parts

Part Overview

The ICM7243BIPLZ is a linear LED driver IC manufactured by Renesas Electronics Corporation, designed for 30mA output applications in a 40-DIP through-hole package. The device operates within a 4.75V to 5.25V supply voltage range and includes internal switching capability for LED dimming control.

This part is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or maintenance requirements for legacy systems utilizing this component.

Substiute Parts

ICM7243BIPLZ

Renesas Electronics CorporationIn Stock: 1984ICM7243BIPLZ Datasheet

Current PartRFQ

AL5809-15S1-7

Diodes IncorporatedIn Stock: 21448AL5809-15S1-7 Datasheet

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BCR401UW6-7

Diodes IncorporatedIn Stock: 36225BCR401UW6-7 Datasheet

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NCR401TR

NXP SemiconductorsIn Stock: 38663NCR401TR Datasheet

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NCR402UX

Nexperia USA Inc.In Stock: 4701NCR402UX Datasheet

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NSIC2030JBT3G

onsemiIn Stock: 52772NSIC2030JBT3G Datasheet

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TL4242QKTTRQ1

Texas InstrumentsIn Stock: 37558TL4242QKTTRQ1 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the ICM7243BIPLZ requires evaluation based on the following critical parameters:

• Output Current Capability: The main part delivers 30mA per channel. Substitute parts must meet or exceed this specification to maintain functional equivalence in LED driver applications.
• Supply Voltage Range: The ICM7243BIPLZ operates within 4.75V to 5.25V. Substitute parts with overlapping or broader supply voltage ranges are considered compatible.
• Internal Switching: The presence of internal switching capability is essential for dimming control functionality.
• Package Type and Mounting: The original through-hole 40-DIP package may be replaced with surface-mount alternatives in modern designs, provided electrical performance is maintained.
• Product Status and Compliance: Active substitute parts with ROHS3 compliance and appropriate certifications ensure regulatory alignment and supply availability.

The identified substitute parts are grouped into two categories:

Category A - Direct Current Output Substitutes (15mA to 100mA range): Parts with output current specifications near or exceeding 30mA, suitable for direct functional replacement in LED driver circuits.

Category B - Specialized Automotive-Grade Substitutes: Parts with automotive qualification (AEC-Q101 or AEC-Q100) and extended temperature ranges, appropriate for mission-critical or automotive applications.

Parameter Comparison

Engineering Selection Recommendations

NSIC2030JBT3G provides the closest functional match to the ICM7243BIPLZ, delivering 30mA output current with identical MSL rating. This part is active, ROHS3 compliant, and maintains supply voltage compatibility within the required range. The current regulator topology with high/low-side sensing ensures reliable LED driver operation.

BCR401UW6-7 offers superior current handling capability at 100mA, making it suitable for applications requiring higher LED brightness or multiple LED strings. This part carries automotive qualification (AEC-Q101) and extended temperature range (-55°C to 150°C), appropriate for demanding environments. The SOT-23-6 surface-mount package requires PCB redesign but provides compact integration.

TL4242QKTTRQ1 is recommended for high-current LED driver applications requiring up to 500mA output. This Texas Instruments part includes automotive qualification (AEC-Q100) and operates across a 4.5V to 42V supply range. The TO-263 package provides thermal management advantages for power-intensive designs.

NCR402UX delivers 20mA output in a compact 6-TSOP surface-mount package with automotive qualification (AEC-Q101) and extended temperature range. This part is suitable for space-constrained applications where the 30mA specification can be relaxed to 20mA.

AL5809-15S1-7 is applicable only in applications where 15mA output current is acceptable. The wide supply voltage range (2.5V to 60V) and extended temperature capability (-40°C to 125°C) support diverse circuit topologies, though the reduced current output limits direct substitution scenarios.

All substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original ICM7243BIPLZ specification.

Frequently Asked Questions (FAQ)

Q: Can the NSIC2030JBT3G directly replace the ICM7243BIPLZ in existing designs?

A: The NSIC2030JBT3G matches the 30mA output current specification and maintains ROHS3 compliance. However, the package transition from 40-DIP through-hole to SMB surface-mount requires PCB redesign. Verify supply voltage compatibility and dimming control interface requirements before implementation.

Q: What is the primary limitation of the AL5809-15S1-7 as a substitute?

A: The AL5809-15S1-7 delivers only 15mA output current, which is 50% below the ICM7243BIPLZ specification. This part is suitable only for applications where reduced LED brightness or lower current requirements are acceptable. The SOD-123 package also requires significant PCB layout changes.

Q: Why is the BCR401UW6-7 recommended for automotive applications?

A: The BCR401UW6-7 carries AEC-Q101 automotive qualification and operates across an extended temperature range of -55°C to 150°C. These certifications ensure reliability in automotive environments subject to thermal cycling and vibration stress. The 100mA output capability also supports higher-brightness LED applications.

Q: How does the TL4242QKTTRQ1 differ functionally from the ICM7243BIPLZ?

A: The TL4242QKTTRQ1 is a high-current LED driver delivering 500mA output, compared to the ICM7243BIPLZ 30mA specification. This part is designed for applications requiring significantly higher LED brightness or multiple parallel LED strings. The TO-263 package provides superior thermal dissipation for power-intensive designs. AEC-Q100 automotive qualification supports mission-critical applications.

Q: What packaging considerations apply when transitioning from the ICM7243BIPLZ to surface-mount substitutes?

A: The ICM7243BIPLZ uses a through-hole 40-DIP package suitable for breadboard prototyping and legacy PCB designs. All identified substitutes employ surface-mount packages (SOD-123, SOT-23-6, 6-TSOP, SMB, or TO-263), requiring PCB redesign with appropriate land patterns, solder paste stencils, and reflow soldering processes. Verify thermal management requirements, particularly for higher-current parts like the TL4242QKTTRQ1.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All identified substitute parts—NSIC2030JBT3G, BCR401UW6-7, NCR402UX, AL5809-15S1-7, and TL4242QKTTRQ1—maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original ICM7243BIPLZ specification.

Q: Which substitute part is recommended for space-constrained designs?

A: The NCR402UX in 6-TSOP package offers the most compact form factor while maintaining 20mA output current and automotive qualification. This part is appropriate for applications where the 30mA specification can be reduced to 20mA and board space is limited.