AT9932TS-G LED Driver Controller Equivalent & Substitute Parts

Part Overview

The AT9932TS-G is a Power Management IC (PMIC) manufactured by Microchip Technology, classified as an LED Driver Controller with PWM dimming capability. This device functions as a DC-DC controller supporting both Step-Down (Buck) and Step-Up (Boost) topologies, designed for automotive-grade applications with AEC-Q100 qualification. The part is currently in Active product status with 12,400 units in stock.

Substitute parts become necessary when the AT9932TS-G reaches end-of-life, experiences supply constraints, or when design requirements necessitate alternative packaging or performance characteristics. The substitute parts listed maintain functional equivalence within the LED driver controller category while accommodating variations in supply voltage ranges, package configurations, and operating temperature specifications.

Substiute Parts

AT9932TS-G

Microchip TechnologyIn Stock: 12440AT9932TS-G Datasheet

Current PartRFQ

BD8381EFV-ME2

ROHM SemiconductorIn Stock: 1866BD8381EFV-ME2 Datasheet

MFR RecommendedRFQ

LT3795EFE#PBF

Analog Devices Inc.In Stock: 88493LT3795EFE#PBF Datasheet

MFR RecommendedRFQ

RT8485GS

Richtek USA Inc.In Stock: 1205RT8485GS Datasheet

MFR RecommendedRFQ

RT8496GS

Richtek USA Inc.In Stock: 1232RT8496GS Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AT9932TS-G is determined by the following critical parameters:

Functional Requirements:

• Device Type: DC DC Controller
• Topology: Step-Down (Buck), Step-Up (Boost) capability
• Number of Outputs: 1
• Dimming Method: PWM or PWM-compatible

Electrical Compatibility:

• Supply Voltage Range: Minimum 5.3V or lower; Maximum 40V or higher
• Frequency Range: Overlap with 100kHz ~ 800kHz operating band
• Internal Switches: No (controller-only architecture)

Environmental & Compliance:

• Operating Temperature: -40°C minimum; 150°C maximum or higher
• Automotive Grade: AEC-Q100 qualification preferred
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity: MSL 3 or better

Package Considerations:

• Mounting Type: Surface Mount
• Pin Count & Footprint: Compatibility with 24-pin or equivalent package density

The four substitute parts listed (BD8381EFV-ME2, LT3795EFE#PBF, RT8485GS, RT8496GS) meet these criteria with documented trade-offs in package size, supply voltage range, and product lifecycle status.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute (Active Status): LT3795EFE#PBF is the recommended primary substitute. This part maintains Active product status, offers the widest supply voltage range (4.5V to 110V), supports both Analog and PWM dimming modes, and provides superior frequency flexibility (100kHz to 1MHz). The MSL rating of 1 (Unlimited) provides handling advantages over the original part's MSL 3 specification. High inventory availability (88,400 units) ensures supply continuity.

Secondary Substitutes (Active Status): RT8485GS and RT8496GS are functionally equivalent alternatives from Richtek USA Inc., both maintaining Active product status. These parts operate within compatible supply voltage ranges (4.5V to 36V), support dual dimming modes, and feature compact 14-SOIC packaging. RT8485GS and RT8496GS are suitable for space-constrained designs where the smaller package footprint is advantageous, though pin-to-pin compatibility with the 24-TSSOP original must be verified through schematic redesign.

Not Recommended for New Designs: BD8381EFV-ME2 carries "Not For New Designs" product status and should be avoided for new development. While functionally compatible, this part's lifecycle status indicates manufacturer discontinuation trajectory. Existing designs currently using this part may continue procurement, but new designs should select from Active-status alternatives.

Temperature Consideration: The AT9932TS-G operates to 150°C (TJ), exceeding all substitute parts' maximum of 125°C. Applications requiring operation above 125°C junction temperature cannot use these substitutes without thermal management redesign.

Frequently Asked Questions (FAQ)

Q: Can RT8485GS or RT8496GS directly replace AT9932TS-G in existing PCB layouts?

A: No. The original part uses 24-TSSOP packaging while RT8485GS and RT8496GS use 14-SOIC packaging. Pin counts and footprints differ significantly. PCB redesign and schematic verification are required. LT3795EFE#PBF and BD8381EFV-ME2 use 28-pin packages, also requiring layout modification.

Q: Why does LT3795EFE#PBF support supply voltages up to 110V when AT9932TS-G maxes at 40V?

A: LT3795EFE#PBF is designed for broader application flexibility across multiple LED driver topologies. The higher voltage rating does not mandate its use in 110V applications; it simply permits operation in higher-voltage systems. For 40V-limited designs, this capability provides design margin without penalty.

Q: Is BD8381EFV-ME2 acceptable for production use despite "Not For New Designs" status?

A: BD8381EFV-ME2 is acceptable for sustaining production of existing designs already qualified with this part. New product development should not select this part. Existing inventory may be consumed, but long-term supply cannot be guaranteed.

Q: What is the significance of MSL rating differences between AT9932TS-G (MSL 3) and LT3795EFE#PBF (MSL 1)?

A: MSL 3 requires moisture bake-out within 168 hours of package opening; MSL 1 has unlimited shelf life without bake-out. LT3795EFE#PBF offers superior handling flexibility and reduced manufacturing process constraints. This is an advantage for supply chain management.

Q: Can these substitutes handle the full -40°C to 150°C operating range of AT9932TS-G?

A: No. All substitute parts are rated to -40°C to 125°C maximum. Applications requiring junction temperatures above 125°C cannot use these substitutes. Thermal design review is mandatory if the original design operates near or above 125°C.

Q: What dimming modes does each substitute support?

A: AT9932TS-G supports PWM dimming only. LT3795EFE#PBF, RT8485GS, and RT8496GS support both Analog and PWM dimming, providing additional flexibility. BD8381EFV-ME2 supports PWM dimming, matching the original part's capability.

Q: Are all substitutes automotive-grade with AEC-Q100 qualification?

A: No. Only AT9932TS-G and BD8381EFV-ME2 carry explicit Automotive grade designation. LT3795EFE#PBF, RT8485GS, and RT8496GS do not list automotive qualification in the provided specifications. Automotive applications must verify qualification status with manufacturers before selection.