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| Part Number | UC3841N | UC3843N | UC3842N | UC3841Q |
|---|---|---|---|---|
| Manufacturer | Texas Instruments | Fairchild Semiconductor | Texas Instruments | Texas Instruments |
| Product Status | Active | Obsolete | Active | Obsolete |
| 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-Down, Step-Up/Step-Down | Step-Up, Step-Up/Step-Down |
| Output Configuration | Positive, Isolation Capable | Positive, Isolation Capable | Positive, Isolation Capable | Positive, Isolation Capable |
| Topology | Boost, Flyback, Forward Converter | Boost, Buck, Buck-Boost, Flyback, Forward | Boost, Buck, Buck-Boost, Flyback, Forward | Boost, Flyback, Forward Converter |
| Number of Outputs | 1 | 1 | 1 | 1 |
| Output Phases | 1 | 1 | 1 | 1 |
| Voltage - Supply (Vcc/Vdd) | 8V ~ 32V | 7.6V ~ 30V | 12V ~ 28V | 8V ~ 32V |
| Frequency - Switching | 500kHz | Up to 500kHz | Up to 500kHz | 500kHz |
| Duty Cycle (Max) | 95% | 97% | 97% | 95% |
| Synchronous Rectifier | No | No | No | No |
| Clock Sync | No | No | No | No |
| Serial Interfaces | - | - | - | - |
| Control Features | Current Limit, Enable, Frequency Control, Ramp, Reset, Soft Start | Frequency Control | Frequency Control | Current Limit, Enable, Frequency Control, Ramp, Reset, 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 | Through Hole | Through Hole | Through Hole | Surface Mount |
| Package / Case | 18-DIP (0.300", 7.62mm) | 8-DIP (0.300", 7.62mm) | 8-DIP (0.300", 7.62mm) | 20-LCC (J-Lead) |
| Supplier Device Package | 18-PDIP | 8-DIP | 8-PDIP | 20-PLCC (9x9) |
