VOLTAGE ADJUSTING APPARATUS

摘要

A voltage adjusting apparatus includes a pulse width modulation (PWM) controller, a switch module, and a feedback module. The PWM controller outputs control signals. The switch module receives the control signals, and outputs working voltages accordingly. The feedback module includes a jumper, a first resistor, a second resistor, and a third resistor. If the first terminal and the second terminal of the jumper are electrically coupled together, the third resistor is cut off from the feedback module by the jumper, the first resistor and the second resistor are electrically coupled in the feedback module, and the switch module outputs a first working voltage accordingly. If the second terminal and the third terminal of the jumper are electrically coupled together, the first resistor, the second resistor, and the third resistor are all electrically coupled in the feedback module, the switch module outputs a second working voltage accordingly.

主权项

1. A voltage adjusting apparatus comprising:
a feedback module comprising a jumper, a first resistor, a second resistor, and a third resistor; a control module comprising a pulse width modulation (PWM) controller configured to output control signals, the PWM controller comprises a feedback terminal; a connection point being located between the feedback terminal and the first resistor; a switch module configured to receive the control signals, and output working voltages accordingly and being electrically coupled to the connection point via the second resistor; and the connection point being further electrically coupled to the second terminal of the jumper via the third resistor; the first terminal of the jumper is idle; the third terminal of the jumper is electrically coupled to the switch module; wherein if the first terminal and the second terminal of the jumper are electrically coupled together, the third resistor is cut off from the feedback module by the jumper, the first resistor and the second resistor are electrically coupled in the feedback module, the switch module outputs a first working voltage accordingly; and wherein if the second terminal and the third terminal of the jumper are electrically coupled together, the first resistor, the second resistor, and the third resistor are all electrically coupled in the feedback module, the switch module outputs a second working voltage accordingly.