Patent ID: 9362768
Filing Date: 2016-06-07
CPC Classification: H02J,H02M,Y02B

Claim Text:
1. A charger, comprising: a rectifier; a transformer coupled to the rectifier; a first diode coupled to the transformer; a capacitor coupled to the first diode; a voltage sampling feedback unit coupled to the capacitor; a pulse width modulation (PWM) controller coupled to the voltage sampling feedback unit; and a semiconductor switching component coupled to the PWM controller, wherein the rectifier is connected to an alternating current power network, wherein one primary end of the transformer is connected to an output end of the rectifier, and the other primary end of the transformer is connected to the semiconductor switching component, wherein one secondary end of the transformer is connected to an anode of the first diode, and the other secondary end of the transformer is grounded, wherein one end of the capacitor is connected to a cathode of the first diode, and the other end of the capacitor is grounded, wherein two input ends of the voltage sampling feedback unit are connected in parallel to the capacitor, wherein a feedback input end of the PWM controller is connected to an output end of the voltage sampling feedback unit, and an output end of the PWM controller is connected to a control end of the semiconductor switching component, wherein the charger further comprises a battery voltage feedback unit, wherein two input ends of the battery voltage feedback unit are connected to an anode and a cathode of a battery of the terminal respectively, and an output end of the battery voltage feedback unit is connected to the voltage sampling feedback unit, wherein the battery voltage feedback unit comprises a triode, a second diode, and a resistor, wherein a base of the triode is connected to an anode of the second diode, a cathode of the second diode is connected to a first end of the resistor, and a second end of the resistor is connected in series to an anode of a battery, wherein the voltage sampling feedback unit measures a voltage output of the charger, wherein the battery voltage feedback unit measures a voltage of the battery, wherein the PWM controller, the voltage sampling feedback unit, and the battery voltage feedback unit dynamically control the voltage output of the charger such that the voltage output of the charger increases according to an equation: wherein V