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| Part Number | UC3844D8 | UC3845D8 | UC3844DX | UC3842D8 | UC3843D8 | UC3844AD8 | UC3844D |
|---|---|---|---|---|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments | Fairchild Semiconductor | Unitrode | Texas Instruments | Texas Instruments | Fairchild Semiconductor |
| Product Status | Active | Active | Obsolete | Active | Active | Active | Obsolete |
| 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-Down, 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-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, Buck, Buck-Boost, Flyback, Forward | Boost, Buck, Buck-Boost, Flyback, Forward | Boost, Buck, Flyback, Forward | Boost, Buck, Buck-Boost, Flyback, Forward |
| 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 | 12V ~ 28V | 10V ~ 30V | 12V ~ 28V | 12V ~ 28V | 10V ~ 30V | 10V ~ 30V |
| Frequency - Switching | Up to 500kHz | Up to 500kHz | Up to 500kHz | Up to 500kHz | Up to 500kHz | Up to 500kHz | Up to 500kHz |
| Duty Cycle (Max) | 48% | 48% | 48% | 97% | 97% | 48% | 48% |
| 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 | Frequency Control | 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 (TA) | 0°C ~ 70°C (TA) |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 14-SOIC (0.209", 5.30mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 14-SOIC (0.209", 5.30mm Width) |
| Supplier Device Package | 8-SOIC | 8-SOIC | 14-SOP | 8-SOIC | 8-SOIC | 8-SOIC | 14-SOP |
