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| Part Number | UC3851DW | UC3861DW | UC2851DW |
|---|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments | Unitrode |
| Product Status | Active | Active | Active |
| Output Isolation | - | Non-Isolated | - |
| Internal Switch(s) | No | Yes | No |
| Voltage - Breakdown | - | - | - |
| Topology | Boost, Buck, Flyback, Forward | Full-Bridge, Half-Bridge, Push-Pull | Boost, Buck, Flyback, Forward |
| Voltage - Start Up | 8 V | 16.5 V | 8 V |
| Voltage - Supply (Vcc/Vdd) | 7.8V ~ 32V | 10.5V ~ 22V | 7.8V ~ 32V |
| Duty Cycle | 50% | - | 50% |
| Frequency - Switching | Up to 500kHz | 10kHz ~ 1MHz | Up to 500kHz |
| Power (Watts) | - | - | - |
| Fault Protection | Current Limiting, Over Voltage | - | Current Limiting, Over Voltage |
| Control Features | Frequency Control, Soft Start | Soft Start | Frequency Control, Soft Start |
| Operating Temperature | 0°C ~ 70°C (TA) | 0°C ~ 70°C (TA) | -40°C ~ 85°C (TA) |
| Package / Case | 18-SOIC (0.295", 7.50mm Width) | 16-SOIC (0.295", 7.50mm Width) | 18-SOIC (0.295", 7.50mm Width) |
| Supplier Device Package | 18-SOIC | 16-SOIC | 18-SOIC |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount |
