UCC28251PWR
ActiveADVANCED HALF-BRIDGE/FULL-BRIDGE PWM CONTROLLER WITH PRE-BIAS OPERATION FOR OFFLINE APPLICATIONS
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UCC28251PWR
ActiveADVANCED HALF-BRIDGE/FULL-BRIDGE PWM CONTROLLER WITH PRE-BIAS OPERATION FOR OFFLINE APPLICATIONS
Technical Specifications
Parameters and characteristics for this part
| Specification | UCC28251PWR |
|---|---|
| Clock Sync | False |
| Control Features | Frequency Control, Soft Start, Enable, Current Limit, Ramp |
| Frequency - Switching [Max] | 945 kHz |
| Frequency - Switching [Min] | 42 kHz |
| Function | Step-Up/Step-Down |
| Mounting Type | Surface Mount |
| Number of Outputs | 2 |
| Operating Temperature [Max] | 125 ¯C |
| Operating Temperature [Min] | -40 °C |
| Output Configuration | Positive |
| Output Phases | 1 |
| Output Type | PWM Signal |
| Package / Case | 20-TSSOP |
| Package / Case [x] | 0.173 in |
| Package / Case [y] | 4.4 mm |
| Supplier Device Package | 20-TSSOP |
| Synchronous Rectifier | True |
| Topology | Half-Bridge, Push-Pull, Full-Bridge |
| Voltage - Supply (Vcc/Vdd) [Max] | 17 V |
| Voltage - Supply (Vcc/Vdd) [Min] | 4.7 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Cut Tape (CT) | 1 | $ 4.20 | |
| 10 | $ 3.77 | |||
| 25 | $ 3.57 | |||
| 100 | $ 3.09 | |||
| 250 | $ 2.93 | |||
| 500 | $ 2.63 | |||
| 1000 | $ 2.22 | |||
| Digi-Reel® | 1 | $ 4.20 | ||
| 10 | $ 3.77 | |||
| 25 | $ 3.57 | |||
| 100 | $ 3.09 | |||
| 250 | $ 2.93 | |||
| 500 | $ 2.63 | |||
| 1000 | $ 2.22 | |||
| Tape & Reel (TR) | 2000 | $ 2.11 | ||
| Texas Instruments | LARGE T&R | 1 | $ 3.17 | |
| 100 | $ 2.78 | |||
| 250 | $ 1.95 | |||
| 1000 | $ 1.57 | |||
Description
General part information
UCC28251 Series
The UCC28251 PWM controller is designed for high power density applications that may have stringent prebiased startup requirements. The UCC28251’s integrated synchronous rectifier control outputs target high efficiency and high performance topologies such as half-bridge, full-bridge, interleaved forward, and push-pull. The UCC27210 half bridge drivers and UCC2752x MOSFET drivers used in conjunction with the UCC28251 provide a complete power converter solution.
The UCC28251 is a functional variant of the UCC28250 PWM Controller. While the same basic functionality of the UCC28250 is largely maintained, the UCC28251 is designed to enhance performance in both offline, 400-V input DC-to-DC applications and 48-V input full-bridge or half-bridge applications.
Externally programmable soft-start, used in conjunction with an internal pre-biased startup circuit, allows the controller to gradually reach a steady-state operating point under all output conditions. The UCC28251 can be configured for primary or secondary-side control and either voltage or current mode control can be implemented.
Documents
Technical documentation and resources