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KA3882ED Equivalent & Substitute Parts
Part Overview
The KA3882ED is an offline switch IC manufactured by onsemi in 8-SOIC packaging, designed for power management applications with converter offline topology operating up to 500kHz. The device features current limiting fault protection and frequency control, with a supply voltage range of 10V to 30V and startup voltage of 16V.
The KA3882ED is classified as obsolete. Identifying suitable substitute parts is necessary to maintain design continuity and ensure component availability for new production runs, repairs, and system upgrades.
Substiute Parts
Key Parameters
| Parameter | KA3882ED Value |
|---|---|
| Manufacturer | onsemi |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| Voltage - Supply (Vcc/Vdd) | 10V ~ 30V |
| Voltage - Start Up | 16V |
| Frequency - Switching | Up to 500kHz |
| Duty Cycle | 96% |
| Fault Protection | Current Limiting |
| Control Features | Frequency Control |
| Operating Temperature | 0°C ~ 70°C (TA) |
| Product Status | Obsolete |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution of the KA3882ED is determined by the following critical parameters:
Physical Compatibility: All substitute parts must use the 8-SOIC (0.154", 3.90mm Width) package in surface mount configuration to ensure PCB footprint compatibility.
Electrical Operating Range: Substitute parts must support the supply voltage range of 10V to 30V. Parts with lower minimum supply voltage (such as 6.9V or 7.9V) or lower maximum supply voltage (such as 12V or 25V) represent functional alternatives but require circuit validation.
Switching Frequency: The KA3882ED operates up to 500kHz. Substitute parts with higher switching frequency capability (up to 1MHz) are functionally compatible and provide design flexibility.
Startup Voltage: The 16V startup voltage requirement is met by all identified substitute parts.
Control Architecture: All substitute parts feature frequency control, matching the KA3882ED control methodology.
Fault Protection: The current limiting protection of the KA3882ED is a design requirement. Substitute parts without explicitly stated fault protection require circuit-level evaluation.
Parameter Comparison
| Parameter | KA3882ED | LT1246CS8#PBF | LT1246CS8#TRPBF | LT1247CS8#PBF | LT1247CS8#TRPBF | UC1842AMDREP | UC1843AMDREP | UC1844AMDREP | UC1845AMDREP | UCC2800MDREP | UCC2800QDREP |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | onsemi | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. | Analog Devices Inc. | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package / Case | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC | 8-SOIC |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Voltage - Supply (Vcc/Vdd) | 10V ~ 30V | 10V ~ 25V | 10V ~ 25V | 8.4V ~ 25V | 8.4V ~ 25V | 10V ~ 30V | 7.9V ~ 30V | 10V ~ 30V | 7.9V ~ 30V | 6.9V ~ 12V | 6.9V ~ 12V |
| Voltage - Start Up | 16V | 16V | 16V | — | — | — | — | — | — | — | — |
| Frequency - Switching | Up to 500kHz | Up to 1MHz | Up to 1MHz | 1MHz | 1MHz | — | — | — | — | — | — |
| Duty Cycle | 96% | 100% | 100% | 100% | 100% | — | — | — | — | — | — |
| Control Features | Frequency Control | Frequency Control | Frequency Control | Frequency Control | Frequency Control | — | — | — | — | — | — |
| Operating Temperature | 0°C ~ 70°C | 0°C ~ 100°C | 0°C ~ 100°C | 0°C ~ 100°C | 0°C ~ 100°C | -55°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C | -40°C ~ 125°C |
| Product Status | Obsolete | Active | Active | Active | Active | Active | Active | Active | Active | Active | Active |
| Moisture Sensitivity Level (MSL) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| RoHS Status | — | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
Engineering Selection Recommendations
Primary Substitutes (Highest Compatibility): LT1246CS8#PBF, LT1246CS8#TRPBF, LT1247CS8#PBF, and LT1247CS8#TRPBF from Analog Devices Inc. maintain the 10V minimum supply voltage requirement and 16V startup voltage specification. These parts are active products with ROHS3 compliance and higher switching frequency capability (up to 1MHz), providing direct functional replacement with enhanced performance margins.
Secondary Substitutes (Supply Voltage Consideration): UC1842AMDREP and UC1844AMDREP from Texas Instruments match the 10V to 30V supply voltage range exactly. These parts are active products with extended operating temperature range (-55°C to 125°C) and ROHS3 compliance. UC1843AMDREP and UC1845AMDREP operate from 7.9V minimum, requiring circuit validation if the design depends on 10V minimum operation.
Limited Substitutes (Supply Voltage Constraint): UCC2800MDREP and UCC2800QDREP operate from 6.9V to 12V maximum supply voltage, which does not meet the KA3882ED's 10V to 30V range. These parts are suitable only for applications where the actual operating supply voltage remains within the 6.9V to 12V window. UCC2800QDREP provides extended operating temperature range (-40°C to 125°C) compared to UCC2800MDREP (-55°C to 125°C).
All identified substitute parts share the 8-SOIC package, surface mount configuration, MSL 1 rating, and REACH unaffected status with the KA3882ED. All substitute parts are active products, ensuring long-term availability and supply chain continuity.
Frequently Asked Questions (FAQ)
Q: Can LT1246CS8#PBF and LT1246CS8#TRPBF be used interchangeably with KA3882ED?
A: Both parts are electrically identical Analog Devices devices differing only in packaging format (Tube versus Tape & Reel). Both support the 10V to 30V supply range and 16V startup voltage. The selection between them depends on procurement and assembly requirements. Both are direct functional substitutes for the KA3882ED.
Q: What is the difference between UC1842AMDREP and UC1843AMDREP?
A: UC1842AMDREP operates from 10V to 30V supply voltage, matching the KA3882ED specification exactly. UC1843AMDREP operates from 7.9V to 30V, allowing operation at lower supply voltages. Both are Texas Instruments PWM controllers in 8-SOIC packaging with identical temperature range and ROHS3 compliance. Selection depends on whether the application requires 10V minimum operation.
Q: Why do UCC2800MDREP and UCC2800QDREP have a lower maximum supply voltage?
A: UCC2800MDREP and UCC2800QDREP are designed for lower voltage applications, with maximum supply voltage of 12V. These parts are not suitable for applications requiring operation above 12V. They are functionally compatible only in systems where the actual operating supply voltage remains within the 6.9V to 12V range.
Q: Are all substitute parts ROHS3 compliant?
A: All identified substitute parts carry ROHS3 compliance certification. The KA3882ED does not specify RoHS status in the provided data. All substitute parts are REACH unaffected, matching the KA3882ED environmental compliance profile.
Q: What is the significance of the 8-SOIC package specification?
A: The 8-SOIC (0.154", 3.90mm Width) package is a standard surface mount configuration. All identified substitute parts use this identical package, ensuring PCB footprint compatibility without layout modifications. This is a critical requirement for direct substitution.
Q: Can I use LT1247CS8#PBF instead of LT1246CS8#PBF?
A: Both are Analog Devices parts in 8-SOIC packaging with identical supply voltage range (10V to 25V minimum, lower than KA3882ED's 10V to 30V maximum). LT1247CS8#PBF is a buck regulator controller with 100% duty cycle, while LT1246CS8#PBF is an offline switch. Both support frequency control and operate up to 1MHz. Selection depends on the specific topology requirements of the application.
Q: What is the operating temperature range consideration for substitution?
A: The KA3882ED operates from 0°C to 70°C. Analog Devices substitutes (LT1246 and LT1247 series) operate from 0°C to 100°C, providing extended high-temperature capability. Texas Instruments substitutes operate from -55°C to 125°C (UC184x series) or -40°C to 125°C (UCC2800QDREP), providing extended temperature range in both directions. Selection depends on the application's thermal environment requirements.
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