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| Part Number | UC3842N | UC3843N | UC3842Q | UC3841N | UC3842AN | UC3842BN | UC3842D | UC3842J |
|---|---|---|---|---|---|---|---|---|
| Manufacturer | Texas Instruments | Fairchild Semiconductor | Unitrode | Texas Instruments | Texas Instruments | STMicroelectronics | Unitrode | Unitrode |
| Product Status | Active | Obsolete | Active | Active | Active | Active | Active | Active |
| Output Type | Transistor Driver | Transistor Driver | Transistor Driver | Transistor Driver | Transistor Driver | Transistor Driver | Transistor Driver | - |
| Function | Step-Up, Step-Down, 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 | Step-Up, Step-Down, Step-Up/Step-Down | Step-Up, Step-Up/Step-Down | Step-Up, Step-Up/Step-Down | - |
| Output Configuration | Positive, Isolation Capable | Positive, Isolation Capable | Positive, Isolation Capable | Positive, Isolation Capable | Positive, Isolation Capable | Positive, Isolation Capable | Positive, Isolation Capable | - |
| Topology | Boost, Buck, Buck-Boost, Flyback, Forward | Boost, Buck, Buck-Boost, Flyback, Forward | Boost, Buck, Buck-Boost, Flyback, Forward | Boost, Flyback, Forward Converter | Boost, Buck, Flyback, Forward | Boost, Flyback | Boost, Flyback | - |
| Number of Outputs | 1 | 1 | 1 | 1 | 1 | 1 | 1 | - |
| Output Phases | 1 | 1 | 1 | 1 | 1 | 1 | 1 | - |
| Voltage - Supply (Vcc/Vdd) | 12V ~ 28V | 7.6V ~ 30V | - | 8V ~ 32V | 10V ~ 30V | 10V ~ 30V | 10V ~ 30V | - |
| Frequency - Switching | Up to 500kHz | Up to 500kHz | Up to 500kHz | 500kHz | Up to 500kHz | Up to 500kHz | Up to 500kHz | - |
| Duty Cycle (Max) | 97% | 97% | 97% | 95% | 96% | 96% | 97% | - |
| Synchronous Rectifier | No | No | No | No | No | No | No | - |
| Clock Sync | No | No | No | No | No | No | No | - |
| Serial Interfaces | - | - | - | - | - | - | - | - |
| Control Features | Frequency Control | Frequency Control | Frequency Control | Current Limit, Enable, Frequency Control, Ramp, Reset, Soft Start | Frequency Control | Frequency Control | Frequency Control | - |
| 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 (TJ) | 0°C ~ 70°C (TA) | - |
| Mounting Type | Through Hole | Through Hole | Surface Mount | Through Hole | Through Hole | Through Hole | Surface Mount | - |
| Package / Case | 8-DIP (0.300", 7.62mm) | 8-DIP (0.300", 7.62mm) | 20-LCC (J-Lead) | 18-DIP (0.300", 7.62mm) | 8-DIP (0.300", 7.62mm) | 8-DIP (0.300", 7.62mm) | 14-SOIC (0.209", 5.30mm Width) | - |
| Supplier Device Package | 8-PDIP | 8-DIP | 20-PLCC (9x9) | 18-PDIP | 8-PDIP | 8-Mini DIP | 14-SOP | - |
