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.
Other device variants can also be found in the UC2637-MIL product page
This data sheet applies to both UC2637 and UC2637-MIL
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | Switched Mode Controller for DC Motor Drive datasheet | 05 Sep 1999 | |
| White paper | How smart tune regulates current in stepper motors (Rev. A) | 19 Mar 2019 | ||
| Application note | U-120 A Simplified Approach to DC Motor Modeling for Dynamic Stability Analysis | 05 Sep 1999 |
For additional terms or required resources, click any title below to view the detail page where available.
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| PDIP (N) | 18 | Ultra Librarian |
| SOIC (DW) | 20 | Ultra Librarian |
Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.
If you have questions about quality, packaging or ordering TI products, see TI support.