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Product InformationFeatures
Description
The UC1637 is a pulse width modulator circuit intended to be used for a variety of PWM motor drive and amplifier applications requiring either uni-directional or bi-directional drive circuits. When used to replace conventional drivers, this circuit can increase efficiency and reduce component costs for many applications. All necessary circuitry is included to generate an analog error signal and modulate two bi-directional pulse train outputs in proportion to the error signal magnitude and polarity. This monolithic device contains a sawtooth oscillator, error amplifier, and two PWM comparators with ±100mA output stages as standard features. Protection circuitry includes under-voltage lockout, pulse-by-pulse current limiting, and a shutdown port with a 2.5V temperature compensated threshold. The UC1637 is characterized for operation over the full military temperature range of -55°C to +125°C, while the UC2637 and UC3637 are characterized for -25°C to +85°C and 0°C to +70°C, respectively. |
| Price | Packaging | CAD Design Tools | Samples | ||||||
| Device | Status | Temp (oC) | Price | Quantity | Package | Pins | Top Side Marking | Package QTY | Package Carrier | Symbols | Footprints | Samples |
| UC2637DW | ACTIVE | -25 to 85 | 3.85 | 1ku | SOIC (DW) | 20 | View | 25 | TUBE | |||
| UC2637DWG4 | ACTIVE | -25 to 85 | 3.85 | 1ku | SOIC (DW) | 20 | View | 25 | TUBE | |||
| UC2637DWTR | ACTIVE | -25 to 85 | 3.55 | 1ku | SOIC (DW) | 20 | View | 2000 | LARGE T&R | Purchase Samples | ||
| UC2637DWTRG4 | ACTIVE | -25 to 85 | 3.55 | 1ku | SOIC (DW) | 20 | View | 2000 | LARGE T&R | Purchase Samples | ||
| UC2637J | ACTIVE | -25 to 85 | 6.03 | 1ku | CDIP (J) | 18 | 1 | TUBE | Contact TI Distributor or Sales Office | |||
| UC2637N | ACTIVE | -25 to 85 | 3.85 | 1ku | PDIP (N) | 18 | View | 20 | TUBE | |||
| UC2637NG4 | ACTIVE | -25 to 85 | 3.85 | 1ku | PDIP (N) | 18 | View | 20 | TUBE | |||
| UC2637Q | ACTIVE | -25 to 85 | 4.50 | 1ku | PLCC (FN) | 20 | View | 46 | TUBE | Purchase Samples | ||
| UC2637QG3 | ACTIVE | -25 to 85 | 4.50 | 1ku | PLCC (FN) | 20 | View | 46 | TUBE | Purchase Samples | ||
| UC2637QTR | ACTIVE | -25 to 85 | 3.55 | 1ku | PLCC (FN) | 20 | View | 1000 | LARGE T&R | Purchase Samples | ||
| UC2637QTRG3 | ACTIVE | -25 to 85 | 3.55 | 1ku | PLCC (FN) | 20 | View | 1000 | 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, 08 Nov 2009 | |||
| Region | Company | In Stock | Purchase |
| TI Lead Time*: 20 WeeksUC2637DW | |||
| Americas | Arrow | 475 | |
| Newark | 43 | ||
| Asia | WPI | 68 | |
| Worldwide | DigiKey | 36 | |
| Mouser Electronics | 46 | ||
| TI Lead Time*: 20 WeeksUC2637DWG4 | |||
| Worldwide | DigiKey | Available | |
| TI Lead Time*: 20 WeeksUC2637DWTR | |||
| Worldwide | DigiKey | Available | |
| TI Lead Time*: 20 WeeksUC2637DWTRG4 | |||
| Worldwide | DigiKey | Available | |
| TI Lead Time*: 8 WeeksUC2637J | |||
| None Reported View Distributors | |||
| TI Lead Time*: 4 WeeksUC2637N | |||
| Americas | Arrow | 97 | |
| Newark | 82 | ||
| Rochester Electronics | 17 | ||
| Asia | WPI | 57 | |
| Europe | Avnet-SILICA | 30 | |
| Worldwide | DigiKey | 180 | |
| Mouser Electronics | 16 | ||
| TI Lead Time*: 4 WeeksUC2637NG4 | |||
| Asia | Farnell Asia | 81 | |
| Europe | EBV Elektronik | 10 | |
| Farnell | 76 | ||
| Worldwide | DigiKey | Available | |
| TI Lead Time*: 4 WeeksUC2637Q | |||
| Americas | Rochester Electronics | 445 | |
| Europe | EBV Elektronik | 18 | |
| TI Lead Time*: 4 WeeksUC2637QG3 | |||
| None Reported View Distributors | |||
| TI Lead Time*: 4 WeeksUC2637QTR | |||
| Americas | Rochester Electronics | 1k | |
| TI Lead Time*: 4 WeeksUC2637QTRG3 | |||
| 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 |
UC2637DW  | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-2-260C-1 YEAR | View | View |
| UC2637DWG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-2-260C-1 YEAR | View | View |
| UC2637DWTR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-2-260C-1 YEAR | View | View |
| UC2637DWTRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-2-260C-1 YEAR | View | View |
| UC2637J | TBD | A42 | N/A for Pkg Type | View | View |
| UC2637N | Green (RoHS & no Sb/Br) | CU NIPDAU | N/A for Pkg Type | View | View |
| UC2637NG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | N/A for Pkg Type | View | View |
| UC2637Q | Green (RoHS & no Sb/Br) | CU SN | Level-2-260C-1 YEAR | View | View |
| UC2637QG3 | Green (RoHS & no Sb/Br) | CU SN | Level-2-260C-1 YEAR | View | View |
| UC2637QTR | Green (RoHS & no Sb/Br) | CU SN | Level-2-260C-1 YEAR | View | View |
| UC2637QTRG3 | Green (RoHS & no Sb/Br) | CU SN | Level-2-260C-1 YEAR | 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 UC2637 
| Customers Who Evaluated This Product Also Evaluated... | |||
| Part # | Name | Product Family | Comments |
| UC3637 | Switched Mode Controller for DC Motor Drive | POWER MANAGEMENT SPECIAL FUNCTIONS-MOTION/MOTOR CONTROL | TI customers also evaluated this product. |
| UC3638 | Advanced PWM Motor Controller | POWER MANAGEMENT SPECIAL FUNCTIONS-MOTION/MOTOR CONTROL | TI customers also evaluated this product. |
| UC1637 | Switched Mode Controller for DC Motor Drive | POWER MANAGEMENT SPECIAL FUNCTIONS-MOTION/MOTOR CONTROL | TI customers also evaluated this product. |
| UC3770B | High Performance Stepper Motor Drive Circuit | POWER MANAGEMENT SPECIAL FUNCTIONS-MOTION/MOTOR CONTROL | TI customers also evaluated this product. |
| UC3625 | Brushless DC Motor Controller | POWER MANAGEMENT SPECIAL FUNCTIONS-MOTION/MOTOR CONTROL | TI customers also evaluated this product. |
| UC2625 | Brushless DC Motor Controller | POWER MANAGEMENT SPECIAL FUNCTIONS-MOTION/MOTOR CONTROL | TI customers also evaluated this product. |
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