Technical Mechanism And Implementation Logic Of Internal State Feedback Signal Of Wide-range Voltage Regulator

In circuit design, accurate voltage output monitoring is fundamental to logic control. When dealing with wide-range input fluctuations, the wide range stabilizer for ac integrates a sophisticated status reporting system. This signal logic, known as PG (Power Good), directly reflects the true accuracy of the device's current voltage conversion and is an indispensable technical element in system timing.

Hardware Composition of the Wide-Range Regulator Monitoring Circuit

During system power-up, the internal monitoring module samples the output in real time. The wide-range regulator's built-in reference voltage source and voltage divider feedback network work together to deliver the sampled voltage to the input of the high-speed comparator. When the output voltage reaches 90% to 95% of the preset rated value, the logic gate circuit undergoes a state transition. This physical process does not rely on external intervention and is entirely triggered autonomously by the chip's internal hardware comparison logic.

Window Design Details for Signal Judgment Thresholds

In the logic architecture of the wide-range regulator, the PG pin typically uses an open-drain structure. This design allows logic signals from different voltage domains to handshake.

Operation of Comparator Hysteresis Logic

During operation, the non-inverting input of the comparator receives a scaled feedback voltage, while the non-inverting input is connected to a high-precision internal reference. To prevent unnecessary oscillations at threshold edges, a hysteresis voltage design is incorporated into the circuit.

1. Low-bit threshold trigger: When the voltage rises from zero to the rated range, the transistor is cut off, and a high-level output is generated through an external pull-up resistor.

2. High-bit threshold response: If the output voltage deviates beyond the safety boundary due to abnormal offset, the internal logic quickly turns the transistor on.

3. Response delay handling: The system incorporates a microsecond-level debouncing timer to identify and eliminate transient voltage glitches.

Level definition of the wide-range regulator logic output

The logic state transition point is precisely locked within the preset regulation range. When the wide-range regulator senses sufficient and stable output power, the PG signal remains in a high-impedance state, maintained high by external circuitry. Once an output drop out of bounds is detected, this signal is immediately pulled low to ground. This simple level change provides a clear start-up signal for the subsequent microprocessor.