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Product InformationFeatures
Description
The UCC2891/2/3/4 family of PWM controllers is designed to simplify implementation of the various active clamp/reset switching power topologies. The UCC289x is a peak current-mode, fixedfrequency, high-performance pulse width modulator. It includes the logic and the drive capability for the auxiliary switch with a simple method of programming the critical delays for proper active clamp operation. The UCC2891/3 includes a 110-V start-up regulator for initial start-up and to provide keep-alive power during stand-by. Additional features include an internal programmable slope compensation circuit, precise DMAX limit, and a single resistor programmable synchronizable oscillator. An accurate line monitoring function also programs the converter\x92s ON and OFF transitions with regard to the bulk input voltage. View All Description in Datasheet |
| Price | Packaging | CAD Design Tools | Samples | ||||||
| Device | Status | Temp (oC) | Price | Quantity | Package | Pins | Top Side Marking | Package QTY | Package Carrier | Symbols | Footprints | Samples |
| UCC2891D | ACTIVE | -40 to 85 | 1.55 | 1ku | SOIC (D) | 16 | View | 40 | TUBE | |||
| UCC2891DG4 | ACTIVE | -40 to 85 | 1.55 | 1ku | SOIC (D) | 16 | View | 40 | TUBE | |||
| UCC2891DR | ACTIVE | -40 to 85 | 1.20 | 1ku | SOIC (D) | 16 | View | 2500 | LARGE T&R | Purchase Samples | ||
| UCC2891DRG4 | ACTIVE | -40 to 85 | 1.20 | 1ku | SOIC (D) | 16 | View | 2500 | LARGE T&R | Purchase Samples | ||
| UCC2891PW | ACTIVE | -40 to 85 | 1.30 | 1ku | TSSOP (PW) | 16 | View | 90 | TUBE | |||
| UCC2891PWG4 | ACTIVE | -40 to 85 | 1.30 | 1ku | TSSOP (PW) | 16 | View | 90 | TUBE | |||
| UCC2891PWR | ACTIVE | -40 to 85 | 1.20 | 1ku | TSSOP (PW) | 16 | View | 2000 | LARGE T&R | Purchase Samples | ||
| UCC2891PWRG4 | ACTIVE | -40 to 85 | 1.20 | 1ku | TSSOP (PW) | 16 | View | 2000 | LARGE T&R | Purchase Samples | ||
* Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For higher volume price quotes,prices in local currency or delivery quotes, please contact your local Texas Instruments Sales Office or Authorized Distributor.
| Reported Distributor Inventory as of 9:50 AM GMT, 20 Nov 2009 | |||
| Region | Company | In Stock | Purchase |
| TI Lead Time*: 20 WeeksUCC2891D | |||
| Americas | Rochester Electronics | 7 | |
| Asia | Farnell Asia | 952 | |
| WPI | 21 | ||
| Europe | Compel | 100 | |
| Farnell | 952 | ||
| TI Lead Time*: 20 WeeksUCC2891DG4 | |||
| None Reported View Distributors | |||
| TI Lead Time*: 20 WeeksUCC2891DR | |||
| Americas | Rochester Electronics | >1k | |
| TI Lead Time*: 20 WeeksUCC2891DRG4 | |||
| None Reported View Distributors | |||
| TI Lead Time*: 20 WeeksUCC2891PW | |||
| None Reported View Distributors | |||
| TI Lead Time*: 20 WeeksUCC2891PWG4 | |||
| None Reported View Distributors | |||
| TI Lead Time*: 20 WeeksUCC2891PWR | |||
| None Reported View Distributors | |||
| TI Lead Time*: 20 WeeksUCC2891PWRG4 | |||
| None Reported View Distributors | |||
** Lead time information is not available at this time. However, our information is updated daily so please check back with us soon. Please contact your preferred TI Authorized Distributor for additional information.
| Product Content | DPPM / MTBF / FIT Rate | ||||
| Device | Eco Plan* | Lead / Ball Finish | MSL Rating / Peak Reflow | Details | Details |
UCC2891D  | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | View | View |
| UCC2891DG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | View | View |
| UCC2891DR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | View | View |
| UCC2891DRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | View | View |
| UCC2891PW | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | View | View |
| UCC2891PWG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | View | View |
| UCC2891PWR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | View | View |
| UCC2891PWRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | View | View |
* The planned eco-friendly classification: Pb-Free (RoHS) or Pb-Free (RoHS Exempt) or Green (RoHS & no Sb/Br) - please click on the Product Content Details "View" link in the table above for the latest availability information and additional product content details.
If the information you are requesting is not available online at this time, contact one of our Product Information Centers regarding the availability of this information.
Most useful technical documents for UCC2891 
View Application Notes for PWM Power Supply Controllers
| Name | Part # | Company | Tool / Software Type |
| UCC2891 Evaluation Module | UCC2891EVM | Texas Instruments | Development Boards/EVMs |
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