NTE1721

The NTE1721 and NTE1723 are pulse width modulator control circuits designed to offer improved performance and lowered external parts count when implemented for controlling all types of switching power supplies. The NTE1721 features NOR logic for its output stages, resulting in a low output for an off state.

Key electrical specifications include an operating voltage range of 8V to 35V, a ±5.1V trimmed reference voltage, and an oscillator frequency range from 100Hz to 400kHz. The device supports adjustable dead time control and has dual source/sink outputs capable of ±400mA peak current. It also includes input undervoltage lockout and a latching PWM to prevent multiple pulses.

This integrated circuit is designed for applications requiring precise control in switching power supplies. Its features like soft-start circuitry and pulse-by-pulse shutdown contribute to stable and reliable operation. The sync input allows for synchronization to an external system clock or slaving multiple units.

Absolute maximum ratings include a supply voltage (VCC) of +40V and a collector supply voltage (VC) of +40V. Logic inputs are rated from -0.3V to +5.5V, and analog inputs from -0.3V to VCC. The device has a power dissipation of 1000mW at TA = +25°C.