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Product InformationFeatures
Description
The UC3902 load share controller is an 8-pin device that balances the current drawn from independent, paralleled power supplies. Load sharing is accomplished by adjusting each supplies’ output current to a level proportional to the voltage on a share bus. The master power supply, which is automatically designated as the supply that regulates to the highest voltage, drives the share bus with a voltage proportional to its output current. The UC3902 trims the output voltage of the other paralleled supplies so that they each support their share of the load current. Typically, each supply is designed for the same current level although that is not necessary for use with the UC3902. By appropriately scaling the current sense resistor, supplies with different output current capability can be paralleled with each supply providing the same percentage of their output current capability for a particular load. 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 |
| UC3902D | ACTIVE | 0 to 70 | 2.05 | 1ku | SOIC (D) | 8 | View | 75 | TUBE | |||
| UC3902DG4 | ACTIVE | 0 to 70 | 2.05 | 1ku | SOIC (D) | 8 | View | 75 | TUBE | |||
| UC3902DTR | ACTIVE | 0 to 70 | 1.95 | 1ku | SOIC (D) | 8 | View | 2500 | LARGE T&R | Purchase Samples | ||
| UC3902DTRG4 | ACTIVE | 0 to 70 | 1.95 | 1ku | SOIC (D) | 8 | View | 2500 | LARGE T&R | Purchase Samples | ||
| UC3902N | ACTIVE | 0 to 70 | 2.05 | 1ku | PDIP (P) | 8 | View | 50 | TUBE | |||
| UC3902NG4 | ACTIVE | 0 to 70 | 2.05 | 1ku | PDIP (P) | 8 | View | 50 | TUBE | |||
* 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 9:52 AM GMT, 25 Nov 2009 | |||
| Region | Company | In Stock | Purchase |
| TI Lead Time*: 20 WeeksUC3902D | |||
| Americas | Rochester Electronics | >1k | |
| Asia | WPI | 166 | |
| Europe | Avnet-SILICA | 5 | |
| Worldwide | Mouser Electronics | 30 | |
| TI Lead Time*: 20 WeeksUC3902DG4 | |||
| None Reported View Distributors | |||
| TI Lead Time*: 20 WeeksUC3902DTR | |||
| Americas | Rochester Electronics | >1k | |
| TI Lead Time*: 20 WeeksUC3902DTRG4 | |||
| None Reported View Distributors | |||
| TI Lead Time*: 20 WeeksUC3902N | |||
| Americas | Arrow | 59 | |
| Rochester Electronics | >1k | ||
| Asia | WPI | 81 | |
| Worldwide | DigiKey | 99 | |
| Mouser Electronics | 639 | ||
| TI Lead Time*: 20 WeeksUC3902NG4 | |||
| Worldwide | DigiKey | Available | |
| Mouser Electronics | 224 | ||
** 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 |
UC3902D  | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | View | View |
| UC3902DG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | View | View |
| UC3902DTR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | View | View |
| UC3902DTRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | View | View |
| UC3902N | Green (RoHS & no Sb/Br) | CU NIPDAU | N/A for Pkg Type | View | View |
| UC3902NG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | N/A for Pkg Type | 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 UC3902 
| Name | Part # | Company | Tool / Software Type |
| UCC39002 Evaluation Module | UCC39002EVM | Texas Instruments | Development Boards/EVMs |
| Part # | Name | Product Family | Comments |
| UCC29002 | Advanced 8-pin Load Share Controller | POWER SUPPLY SUPPORT - LOADSHARE | This device has SIMILAR FUNCTIONALITY, newer device with better features |
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