UC2637DW Datasheet | Unitrode

FEATURES - Single or Dual Supply Operation - ±2.5V to ±20V Input Supply Range - ±5% Initial Oscillator Accuracy; ± 10% Over Temperature - Pulse-by-Pulse Current Limiting - Under-Voltage Lockout - Shutdown Input with Temperature pensated 2.5V Threshold - Unmitted PWM parators for Design Flexibility - Dual 100m A, Source/Sink Output Drivers BLOCK DIAGRAM 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 bidirectional drive circuits. When used to replace conventional drivers, this circuit can increase efficiency and reduce ponent 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 parators with ±100m A 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 pensated 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. ABSOLUTE MAXIMUM RATINGS (Note 1) Supply Voltage (±Vs) - - - - - - - - - - . ±20V Output Current, Source/Sink (Pins 4, 7) - - - - - - - 500m A Analog Inputs (Pins 1, 2, 3, 8, 9, 10, 11 12, 13, 14, 15, 16) - - - - . . . ±Vs Error Amplifier Output Current (Pin 17) - - - - - - - ±20m A Oscillator Charging Current (Pin 18)- - - - - - - . . . . -2m A Power...