Texas Instruments UC3637 Switched Mode Controller for DC Motor Drive UC3637Q

The UC3637 is a switched mode controller designed for DC motor drive applications, characterized for operation within a temperature range of 0°C to +70°C. It supports single or dual supply operation with an input voltage range of -2.5V to -20V. The device features a pulse width modulation (PWM) circuit that can be utilized for both uni-directional and bi-directional drive circuits, enhancing efficiency and reducing component costs compared to conventional drivers. Key features include pulse-by-pulse current limiting, under-voltage lockout, and a shutdown input with a temperature-compensated threshold of 2.5V. The UC3637 integrates dual 100mA source/sink output drivers and uncommitted PWM comparators, providing flexibility in design. The device also includes a sawtooth oscillator and an error amplifier, which generate an analog error signal to modulate the PWM outputs based on the error signal's magnitude and polarity. Engineers may find the UC3637 suitable for applications requiring reliable motor control with built-in protection features and a robust operating temperature range.