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| Part Number | UC3846N | UC3866N | UC3886N | UC3856N | UC3847N | UC3846Q | UC3844N | UC3845N | UC3846J |
|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments | Unitrode | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Product Status | Active | Active | Active | Active | Obsolete | Obsolete | Active | Active | Active |
| Output Type | Transistor Driver | - | Transistor Driver | Transistor Driver | Transistor Driver | Transistor Driver | Transistor Driver | Transistor Driver | Transistor Driver |
| Function | Step-Up, Step-Up/Step-Down | - | Step-Down | Step-Up, Step-Down, Step-Up/Step-Down | Step-Up, Step-Up/Step-Down | Step-Up, Step-Up/Step-Down | Step-Up, Step-Down, Step-Up/Step-Down | Step-Up, Step-Down, Step-Up/Step-Down | Step-Up, Step-Up/Step-Down |
| Output Configuration | Positive | - | Positive | Positive | Positive | Positive | Positive, Isolation Capable | Positive, Isolation Capable | Positive |
| Topology | Boost, Flyback, Forward Converter, Half-Bridge, Push-Pull | - | Buck | Buck, Boost, Flyback, Forward Converter, Full-Bridge, Half-Bridge, Push-Pull | Boost, Flyback, Forward Converter, Half-Bridge, Push-Pull | Boost, Flyback, Forward Converter, Half-Bridge, Push-Pull | Boost, Buck, Buck-Boost, Flyback, Forward | Boost, Buck, Buck-Boost, Flyback, Forward | Boost, Flyback, Forward Converter, Half-Bridge, Push-Pull |
| Number of Outputs | 2 | - | 1 | 2 | 2 | 2 | 1 | 1 | 2 |
| Output Phases | 1 | - | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Voltage - Supply (Vcc/Vdd) | 6.95V ~ 40V | - | 10.3V ~ 20V | 7V ~ 40V | 6.95V ~ 40V | 6.95V ~ 40V | 12V ~ 28V | 12V ~ 28V | 6.95V ~ 40V |
| Frequency - Switching | 500kHz | - | Up to 300kHz | 200kHz | 500kHz | 500kHz | Up to 500kHz | Up to 500kHz | 500kHz |
| Duty Cycle (Max) | 50% | - | 90% | 47% | 50% | 50% | 48% | 48% | 50% |
| Synchronous Rectifier | Yes | - | No | Yes | Yes | Yes | No | No | Yes |
| Clock Sync | Yes | - | No | Yes | Yes | Yes | No | No | Yes |
| Serial Interfaces | - | - | - | - | - | - | - | - | - |
| Control Features | Current Limit, Enable, Frequency Control, Soft Start | - | Enable, Frequency Control | Enable, Frequency Control, Soft Start | Current Limit, Enable, Frequency Control, Soft Start | Current Limit, Enable, Frequency Control, Soft Start | Frequency Control | Frequency Control | Current Limit, Enable, Frequency Control, Soft Start |
| Operating Temperature | 0°C ~ 70°C (TA) | - | 0°C ~ 70°C (TA) | 0°C ~ 70°C (TA) | 0°C ~ 70°C (TA) | 0°C ~ 70°C (TA) | 0°C ~ 70°C (TA) | 0°C ~ 70°C (TA) | 0°C ~ 70°C (TA) |
| Mounting Type | Through Hole | - | Through Hole | Through Hole | Through Hole | Surface Mount | Through Hole | Through Hole | Through Hole |
| Package / Case | 16-DIP (0.300", 7.62mm) | - | 16-DIP (0.300", 7.62mm) | 16-DIP (0.300", 7.62mm) | 16-DIP (0.300", 7.62mm) | 20-LCC (J-Lead) | 8-DIP (0.300", 7.62mm) | 8-DIP (0.300", 7.62mm) | 16-CDIP (0.300", 7.62mm) |
| Supplier Device Package | 16-PDIP | - | 16-PDIP | 16-PDIP | 16-PDIP | 20-PLCC (9x9) | 8-PDIP | 8-PDIP | 16-CDIP |
