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Other qualified versions of UC3638
Customers Who Evaluated This Product Also Evaluated
Product InformationFeatures
Description
The UC2638 family of integrated circuits are advanced pulse width modulators intended for a variety of PWM motor drive and amplifier applications requiring either uni-directional or bi-directional drive circuits. Similar in architecture to the UC2637, 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. Key features of the UC2638 include a programmable high speed triangle oscillator, a 5X differential current sensing amplifier, a high slew rate error amplifier, high speed PWM comparators, and two 50mA open collector as well as two ±500mA totem pole output stages. The individual circuit blocks are designed to provide practical operation to switching frequencies of 500kHz. Significant improvements in circuit speed, elimination of many external programming components, and the inclusion of a differential current sense amplifier, allow this controller to be specified for higher performance applications, yet maintain the flexibility of the UC2637. The current sense amplifier in conjunction with the error amplifier can be configured for average current feedback. The additional open collector outputs provide a drive signal for the highside switches in a full bridge configuration. The programmable AREFIN pin allows for single or dual supply operation. Oscillator ramp amplitude and PWM deadband are programmable by tapping a voltage divider off the 5V reference to the appropriate programming input (PVSET or DB). Additional features include a precision externally available 5V reference, undervoltage lockout, pulse-by-pulse peak current limiting, and a remote shutdown port. The UC1638 family is available in the 20 pin N, DW and J packages. Consult the factory for other packaging options. |
| Price | Packaging | CAD Design Tools | Samples | ||||||
| Device | Status | Temp (oC) | Price | Quantity | Package | Pins | Top Side Marking | Package QTY | Package Carrier | Symbols | Footprints | Samples |
| UC3638DW | ACTIVE | 0 to 70 | 3.60 | 1ku | SOIC (DW) | 20 | View | 25 | TUBE | |||
| UC3638DWG4 | ACTIVE | 0 to 70 | 3.60 | 1ku | SOIC (DW) | 20 | View | 25 | TUBE | |||
| UC3638DWTR | ACTIVE | 0 to 70 | 3.30 | 1ku | SOIC (DW) | 20 | View | 2000 | LARGE T&R | Purchase Samples | ||
| UC3638DWTRG4 | ACTIVE | 0 to 70 | 3.30 | 1ku | SOIC (DW) | 20 | View | 2000 | LARGE T&R | Purchase Samples | ||
| UC3638N | ACTIVE | 0 to 70 | 4.25 | 1ku | PDIP (N) | 20 | View | 20 | TUBE | |||
| UC3638NG4 | ACTIVE | 0 to 70 | 4.25 | 1ku | PDIP (N) | 20 | View | 20 | TUBE | |||
| UC3638Q | ACTIVE | 0 to 70 | 4.25 | 1ku | PLCC (FN) | 20 | View | 46 | TUBE | |||
| UC3638QG3 | ACTIVE | 0 to 70 | 4.25 | 1ku | PLCC (FN) | 20 | View | 46 | 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 9:44 AM GMT, 06 Nov 2009 | |||
| Region | Company | In Stock | Purchase |
| TI Lead Time*: 20 WeeksUC3638DW | |||
| Americas | Rochester Electronics | 100 | |
| Asia | WPI | 45 | |
| Europe | Arrow Northern Europe | 100 | |
| TI Lead Time*: 20 WeeksUC3638DWG4 | |||
| Americas | Avnet | 38 | |
| Asia | Farnell Asia | 61 | |
| Europe | Farnell | 46 | |
| TI Lead Time*: 20 WeeksUC3638DWTR | |||
| None Reported View Distributors | |||
| TI Lead Time*: 20 WeeksUC3638DWTRG4 | |||
| None Reported View Distributors | |||
| TI Lead Time*: 4 WeeksUC3638N | |||
| Americas | Arrow | 970 | |
| Newark | 68 | ||
| Rochester Electronics | 517 | ||
| Europe | Arrow Southern Europe | 280 | |
| Avnet-SILICA | 60 | ||
| EBV Elektronik | 2 | ||
| Worldwide | DigiKey | 506 | |
| Mouser Electronics | 35 | ||
| TI Lead Time*: 4 WeeksUC3638NG4 | |||
| Asia | Farnell Asia | 67 | |
| Europe | Farnell | 59 | |
| Worldwide | DigiKey | Available | |
| TI Lead Time*: 10 WeeksUC3638Q | |||
| Americas | Rochester Electronics | 946 | |
| Worldwide | DigiKey | 109 | |
| TI Lead Time*: 10 WeeksUC3638QG3 | |||
| Americas | Avnet | 276 | |
| Worldwide | DigiKey | Available | |
** 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 |
UC3638DW  | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-2-260C-1 YEAR | View | View |
| UC3638DWG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-2-260C-1 YEAR | View | View |
| UC3638DWTR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-2-260C-1 YEAR | View | View |
| UC3638DWTRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-2-260C-1 YEAR | View | View |
| UC3638N | Green (RoHS & no Sb/Br) | CU NIPDAU | N/A for Pkg Type | View | View |
| UC3638NG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | N/A for Pkg Type | View | View |
| UC3638Q | Green (RoHS & no Sb/Br) | CU SN | Level-2-260C-1 YEAR | View | View |
| UC3638QG3 | 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 UC3638 
| Customers Who Evaluated This Product Also Evaluated... | |||
| Part # | Name | Product Family | Comments |
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| UCC3626 | Brushless DC Motor Controller | 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. |
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| UC2637 | Switched Mode Controller for DC Motor Drive | POWER MANAGEMENT SPECIAL FUNCTIONS-MOTION/MOTOR CONTROL | TI customers also evaluated this product. |
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