KA3882C Equivalent & Substitute Parts

Part Overview

The KA3882C is an offline switch flyback converter IC manufactured by onsemi, designed for power management applications requiring flyback topology conversion. This 8-DIP through-hole component operates at switching frequencies up to 500kHz with a maximum duty cycle of 96% and supply voltage range of 10V to 30V. The product is currently obsolete, making equivalent and substitute parts necessary for ongoing system support, maintenance, and new design implementations where flyback topology requirements are maintained.

Substiute Parts

KA3882C

onsemiIn Stock: 3491KA3882C Datasheet

Current PartRFQ

LT1246CN8#PBF

Analog Devices Inc.In Stock: 801LT1246CN8#PBF Datasheet

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TL2844P

Texas InstrumentsIn Stock: 7100TL2844P Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the KA3882C are selected based on the following critical parameters that determine functional compatibility:

Primary Selection Criteria:

• Package compatibility: 8-DIP (0.300", 7.62mm) form factor with through-hole mounting
• Supply voltage range: 10V ~ 30V operating window
• Switching frequency capability: Up to 500kHz or higher
• Control methodology: Frequency control feature
• Fault protection: Current limiting capability

Topology Consideration: The KA3882C uses flyback topology. Substitute parts may employ alternative topologies (buck, boost, forward) provided they maintain the same electrical operating parameters and package form factor, as topology selection is application-dependent and determined by the external circuit design rather than the IC itself.

Active Product Status: Both substitute parts listed (LT1246CN8#PBF and TL2844P) maintain active product status, ensuring long-term availability and continued manufacturer support compared to the obsolete KA3882C.

Parameter Comparison

Engineering Selection Recommendations

TL2844P (Texas Instruments) - Primary Substitute

The TL2844P is the preferred substitute for KA3882C applications. It maintains identical supply voltage range (10V ~ 30V), matching switching frequency capability (up to 500kHz), and supports flyback topology as a primary operating mode. The TL2844P also supports boost and forward topologies, providing design flexibility. Active product status ensures continued availability and manufacturer support. Operating temperature range of -40°C ~ 85°C exceeds the KA3882C specification, offering broader environmental compatibility. RoHS3 compliance and REACH Unaffected status meet current regulatory requirements.

LT1246CN8#PBF (Analog Devices Inc.) - Secondary Substitute

The LT1246CN8#PBF serves as an alternative substitute where buck topology is acceptable for the application. It maintains the 8-DIP package form factor and frequency control feature. The supply voltage range is slightly reduced (10V ~ 25V), which may limit compatibility in applications requiring the full 30V upper limit. Switching frequency capability extends to 1MHz, providing higher frequency operation if required. Operating temperature range of 0°C ~ 100°C offers extended high-temperature performance. Active product status and RoHS3 compliance ensure regulatory compliance and long-term availability.

Compliance and Certification:

Both substitute parts maintain REACH Unaffected and EAR99 ECCN classifications, matching the regulatory profile of the KA3882C. Selection between TL2844P and LT1246CN8#PBF depends on specific topology requirements and supply voltage constraints of the target application.

Frequently Asked Questions (FAQ)

Q: Can TL2844P directly replace KA3882C in existing designs?

A: TL2844P is pin-compatible in 8-DIP package format and maintains the same supply voltage range (10V ~ 30V) and switching frequency capability (up to 500kHz). However, circuit validation is required to confirm functional equivalence, as topology support differs. TL2844P supports flyback topology, making it suitable for most KA3882C applications.

Q: What is the key difference between TL2844P and LT1246CN8#PBF?

A: The primary difference is topology support. TL2844P supports flyback, boost, and forward topologies, while LT1246CN8#PBF is optimized for buck topology. Additionally, LT1246CN8#PBF has a reduced maximum supply voltage of 25V compared to 30V for both KA3882C and TL2844P. Supply voltage compatibility must be verified for your specific application.

Q: Are both substitute parts available in the same package as KA3882C?

A: Yes. Both TL2844P and LT1246CN8#PBF are available in 8-DIP (0.300", 7.62mm) through-hole package format, matching the KA3882C package specification. This ensures mechanical compatibility with existing PCB layouts.

Q: What is the operating temperature range difference?

A: KA3882C operates from 0°C to 70°C. TL2844P extends this to -40°C to 85°C, and LT1246CN8#PBF to 0°C to 100°C. Selection depends on the thermal environment of your application. TL2844P provides the widest low-temperature range, while LT1246CN8#PBF provides the highest temperature capability.

Q: Do both substitutes meet current regulatory requirements?

A: Yes. Both TL2844P and LT1246CN8#PBF maintain REACH Unaffected status and EAR99 ECCN classification, matching the regulatory profile of KA3882C. Both are active products with current manufacturer support, ensuring compliance with evolving standards.

Q: What is the switching frequency difference?

A: KA3882C and TL2844P both support up to 500kHz switching frequency. LT1246CN8#PBF supports up to 1MHz, providing higher frequency operation if required by the application. Higher switching frequency may reduce external component size but requires careful PCB layout consideration.

Q: Is the startup voltage specification critical for substitution?

A: Both KA3882C and LT1246CN8#PBF specify 16V startup voltage. TL2844P does not specify this parameter in the provided data. If startup voltage is critical to your application, verify TL2844P specifications with the manufacturer or conduct circuit testing to confirm compatibility.