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| Part Number | UC3846Q | UC3856Q | UC3846J | UC3846N |
|---|---|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Product Status | Obsolete | Obsolete | Active | Active |
| Output Type | Transistor Driver | Transistor Driver | Transistor Driver | Transistor Driver |
| Function | Step-Up, Step-Up/Step-Down | Step-Up, Step-Down, Step-Up/Step-Down | Step-Up, Step-Up/Step-Down | Step-Up, Step-Up/Step-Down |
| Output Configuration | Positive | Positive | Positive | Positive |
| Topology | Boost, Flyback, Forward Converter, Half-Bridge, Push-Pull | 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 |
| Number of Outputs | 2 | 2 | 2 | 2 |
| Output Phases | 1 | 1 | 1 | 1 |
| Voltage - Supply (Vcc/Vdd) | 6.95V ~ 40V | 7V ~ 40V | 6.95V ~ 40V | 6.95V ~ 40V |
| Frequency - Switching | 500kHz | 200kHz | 500kHz | 500kHz |
| Duty Cycle (Max) | 50% | 47% | 50% | 50% |
| Synchronous Rectifier | Yes | Yes | Yes | Yes |
| Clock Sync | Yes | Yes | Yes | Yes |
| Serial Interfaces | - | - | - | - |
| Control Features | Current Limit, Enable, Frequency Control, Soft Start | Enable, Frequency Control, Soft Start | Current Limit, Enable, Frequency Control, Soft Start | 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) |
| Mounting Type | Surface Mount | Surface Mount | Through Hole | Through Hole |
| Package / Case | 20-LCC (J-Lead) | 20-LCC (J-Lead) | 16-CDIP (0.300", 7.62mm) | 16-DIP (0.300", 7.62mm) |
| Supplier Device Package | 20-PLCC (9x9) | 20-PLCC (9x9) | 16-CDIP | 16-PDIP |
