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KA3882CDTF Equivalent & Substitute Parts
Part Overview
The KA3882CDTF is an offline switch flyback converter IC manufactured by onsemi, designed for power management applications requiring flyback topology conversion. The device operates at switching frequencies up to 500kHz with input voltage supply range of 10V to 30V and startup voltage of 16V. The product is currently obsolete, making identification of functionally equivalent substitute components essential for design continuity and procurement planning.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | KA3882CDTF |
| Manufacturer | onsemi |
| Category | Power Management (PMIC) |
| Description | IC OFFLINE SWITCH FLYBACK 8SOIC |
| Topology | Flyback |
| 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) |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution of the KA3882CDTF is determined by the following critical parameters:
Primary Compatibility Criteria:
- Package type: 8-SOIC form factor (0.154", 3.90mm Width)
- Mounting type: Surface Mount
- Voltage supply range: Minimum 10V ~ 30V compatibility
- Topology: Flyback or multi-topology capable controllers
- Switching frequency: Up to 500kHz or higher
- Control features: Frequency control capability
- Fault protection: Current limiting functionality
Substitute Categories:
Category 1 - Analog Devices Buck Topology Controllers (LT1246/LT1247 Series): These parts share identical 8-SOIC packaging, surface mount configuration, and frequency control features. While topology differs (Buck vs. Flyback), these controllers operate within compatible voltage supply ranges (10V ~ 25V for LT1246; 8.4V ~ 25V for LT1247) and support switching frequencies up to 1MHz, exceeding the KA3882CDTF specification. Active product status ensures long-term availability.
Category 2 - Texas Instruments PWM Controllers (UC1842/UC1843/UC1844/UC1845 Series): These PWM controller ICs maintain 8-SOIC packaging and surface mount mounting. The UC1842AMDREP and UC1844AMDREP support 10V ~ 30V supply voltage matching the KA3882CDTF specification. UC1843AMDREP and UC1845AMDREP operate at 7.9V ~ 30V. All feature frequency control and current limiting protection. Active product status provides design continuity.
Category 3 - Texas Instruments UCC2800 Series: The UCC2800MDREP and UCC2800QDREP maintain 8-SOIC packaging and surface mount configuration. Supply voltage range is 6.9V ~ 12V, which overlaps the lower portion of the KA3882CDTF range. These multi-topology capable controllers support frequency control and operate at switching frequencies compatible with the original specification. Active product status and high inventory availability support procurement reliability.
Parameter Comparison
| Parameter | KA3882CDTF | LT1246CS8#PBF | LT1246CS8#TRPBF | LT1247CS8#PBF | LT1247CS8#TRPBF | UC1842AMDREP | UC1843AMDREP | UC1844AMDREP | UC1845AMDREP | UCC2800MDREP | UCC2800QDREP |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | onsemi | Analog Devices | Analog Devices | Analog Devices | Analog Devices | 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 |
| Frequency - Switching | Up to 500kHz | Up to 1MHz | Up to 1MHz | 1MHz | 1MHz | — | — | — | — | — | — |
| Control Features | Frequency Control | Frequency Control | Frequency Control | Frequency Control | Frequency Control | PWM Controller | PWM Controller | PWM Controller | PWM Controller | PWM Controller | PWM Controller |
| Operating Temperature | 0°C ~ 70°C (TA) | 0°C ~ 100°C (TA) | 0°C ~ 100°C (TA) | 0°C ~ 100°C (TJ) | 0°C ~ 100°C (TJ) | -55°C ~ 125°C (TA) | -55°C ~ 125°C (TA) | -55°C ~ 125°C (TA) | -55°C ~ 125°C (TA) | -55°C ~ 125°C (TA) | -40°C ~ 125°C (TA) |
| Product Status | Obsolete | Active | Active | Active | Active | Active | Active | Active | Active | Active | Active |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
| RoHS Status | — | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| REACH Status | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected | REACH Unaffected |
Engineering Selection Recommendations
For Active Product Status and Long-Term Availability:
The Analog Devices LT1246CS8#PBF, LT1246CS8#TRPBF, LT1247CS8#PBF, and LT1247CS8#TRPBF series are recommended as primary substitutes. All maintain active product status with ROHS3 compliance and REACH unaffected certification. These parts provide extended operating temperature ranges (0°C ~ 100°C) compared to the KA3882CDTF (0°C ~ 70°C), supporting broader application environments. Switching frequency capability up to 1MHz exceeds the original 500kHz specification, enabling design flexibility.
For Full Voltage Supply Range Compatibility:
The Texas Instruments UC1842AMDREP and UC1844AMDREP maintain the exact 10V ~ 30V supply voltage range of the KA3882CDTF. Both are active products with ROHS3 compliance and extended operating temperature range (-55°C ~ 125°C). These PWM controllers provide current limiting protection matching the original specification.
For Multi-Topology Flexibility:
The Texas Instruments UCC2800MDREP and UCC2800QDREP offer multi-topology capability with active product status and ROHS3 compliance. The UCC2800QDREP provides extended operating temperature range (-40°C ~ 125°C) suitable for industrial applications. Supply voltage range is 6.9V ~ 12V, overlapping the lower portion of the KA3882CDTF specification.
All substitute parts share identical 8-SOIC packaging, surface mount mounting type, and MSL 1 (Unlimited) moisture sensitivity rating, ensuring direct PCB compatibility without layout modifications.
Frequently Asked Questions (FAQ)
Q: Can LT1246 and LT1247 series parts directly replace the KA3882CDTF?
A: LT1246 and LT1247 series parts share identical 8-SOIC packaging and surface mount configuration. Both support frequency control and operate within compatible voltage supply ranges. LT1246 operates at 10V ~ 25V; LT1247 operates at 8.4V ~ 25V. The KA3882CDTF operates at 10V ~ 30V. For applications requiring the full 30V upper limit, verify that the LT1246/LT1247 voltage range is sufficient for your design.
Q: What is the difference between tube and tape & reel packaging options?
A: Tube packaging (LT1246CS8#PBF, LT1247CS8#PBF) is suitable for lower-volume applications and manual assembly. Tape & Reel packaging (LT1246CS8#TRPBF, LT1247CS8#TRPBF) is optimized for automated pick-and-place assembly in high-volume production. Both contain identical die and electrical specifications; packaging selection depends on assembly process requirements.
Q: Why do UC1842/UC1843/UC1844/UC1845 series parts have different voltage supply ranges?
A: UC1842AMDREP and UC1844AMDREP support 10V ~ 30V supply voltage, matching the KA3882CDTF specification. UC1843AMDREP and UC1845AMDREP support 7.9V ~ 30V. Selection depends on your minimum supply voltage requirement. For designs requiring exactly 10V minimum, UC1842AMDREP or UC1844AMDREP are appropriate.
Q: Is the UCC2800 series suitable for applications requiring 30V supply voltage?
A: UCC2800MDREP and UCC2800QDREP operate at 6.9V ~ 12V supply voltage range. These parts are not suitable for applications requiring the full 10V ~ 30V range of the KA3882CDTF. Use UCC2800 series only for designs operating within the 6.9V ~ 12V window.
Q: What compliance certifications apply to all substitute parts?
A: All substitute parts listed are ROHS3 compliant and REACH unaffected. All maintain MSL 1 (Unlimited) moisture sensitivity rating, identical to the KA3882CDTF. These certifications ensure regulatory compliance for industrial and commercial applications.
Q: Do substitute parts require PCB layout modifications?
A: No. All substitute parts use 8-SOIC (0.154", 3.90mm Width) packaging with surface mount configuration, identical to the KA3882CDTF. Direct PCB footprint compatibility is maintained without layout changes.
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