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| Part Number | UCC28251PWR | UCC28951PWR | UCC28231PWR | UCC28250PWR | UCC28251PW |
|---|---|---|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Product Status | Active | Active | Obsolete | Active | Active |
| Output Type | PWM Signal | Transistor Driver | Transistor Driver | PWM Signal | PWM Signal |
| Function | Step-Up/Step-Down | - | Step-Up/Step-Down | Step-Up/Step-Down | Step-Up/Step-Down |
| Output Configuration | Positive | Positive | Positive | Positive | Positive |
| Topology | Full-Bridge, Half-Bridge, Push-Pull | Full-Bridge | Full-Bridge, Half-Bridge, Push-Pull | Full-Bridge, Half-Bridge, Push-Pull | Full-Bridge, Half-Bridge, Push-Pull |
| Number of Outputs | 2 | 6 | 4 | 2 | 2 |
| Output Phases | 1 | 1 | 1 | 1 | 1 |
| Voltage - Supply (Vcc/Vdd) | 4.7V ~ 17V | 8V ~ 17V | 7V ~ 17V | 4.7V ~ 17V | 4.7V ~ 17V |
| Frequency - Switching | 42kHz ~ 945kHz | Up to 1MHz | 100kHz ~ 550kHz | 85kHz ~ 1.15MHz | 42kHz ~ 945kHz |
| Duty Cycle (Max) | - | 95% | - | - | - |
| Synchronous Rectifier | Yes | Yes | No | Yes | Yes |
| Clock Sync | No | Yes | No | No | No |
| Serial Interfaces | - | - | - | - | - |
| Control Features | Current Limit, Enable, Frequency Control, Ramp, Soft Start | Enable, Frequency Control, Soft Start | Frequency Control, Soft Start | Current Limit, Enable, Frequency Control, Ramp, Soft Start | Current Limit, Enable, Frequency Control, Ramp, Soft Start |
| Operating Temperature | -40°C ~ 125°C (TJ) | -40°C ~ 125°C (TJ) | -55°C ~ 125°C (TJ) | -40°C ~ 125°C (TJ) | -40°C ~ 125°C (TJ) |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Package / Case | 20-TSSOP (0.173", 4.40mm Width) | 24-TSSOP (0.173", 4.40mm Width) | 14-TSSOP (0.173", 4.40mm Width) | 20-TSSOP (0.173", 4.40mm Width) | 20-TSSOP (0.173", 4.40mm Width) |
| Supplier Device Package | 20-TSSOP | 24-TSSOP | 14-TSSOP | 20-TSSOP | 20-TSSOP |
