| 摘要 |
A converter control system includes an analog-to-digital converter, a filter and a control module. The analog-to-digital converter digitalizes a different-time and a real-time feedback voltage. The filter bases on the different-time feedback voltage to sample a historical average feedback voltage. The control module receives the real-time feedback voltage, bases on the historical average feedback voltage to detect a load status of the converter, and bases on the real-time feedback voltage and the historical average feedback voltage to derive a voltage difference. The control module applies a control duty cycle to control the load switch. While the control module detects that the load status switches to a heavy-load status and the voltage difference reaches the threshold voltage, the control duty cycle is increased. While the control module detects that the load status switches to the light-load status and the voltage difference reaches the threshold voltage, the control duty cycle is decreased. |
| 主权项 |
1. A converter control system, electrically coupled with a converter, the converter including an input level circuit, a load switch and an output level circuit, the load switch being electrically coupled with the input level circuit, the output level circuit being electrically coupled with the input level circuit, the converter control system comprising:
an analog-to-digital converter (ADC), electrically coupled with an output terminal of the output level circuit, being to convert a different-time feedback voltage outputted at the output terminal in a different time from an analog-signal form to a digital-signal form, also being to convert a real-time feedback voltage outputted at the output terminal in a real time from an analog-signal form to a digital-signal form; a filter, electrically coupled with the analog-to-digital converter, being to base on the different-time feedback voltage in the digital-signal form to sample a historical average feedback voltage; and a control module, electrically coupled with the analog-to-digital converter, the filter and the load switch, having a threshold voltage, being to receive the real-time feedback voltage in the digital form outputted from the output terminal, also being to base on the historical average feedback voltage to detect a load status of the converter, further being to base on the real-time feedback voltage and the historical average feedback voltage to derive a voltage difference; wherein the control module applies a control duty cycle to control the load switch; wherein, while the control module detects that the load status is switched from a light-load status to a heavy-load status and the voltage difference reaches the threshold voltage, the control duty cycle is increased for controlling the load switch; wherein, while the control module detects that the load status is switched from the heavy-load status to the light-load status and the voltage difference reaches the threshold voltage, the control duty cycle is decreased for controlling the load switch. |
