Abstract: A control device includes a first capacitor, a drive controller, a constant current source, a discharge-controlled current source, a current mirror, and a sample-and-hold circuit. The constant current source generates a constant current. The discharge-controlled current source is coupled to the constant current source and the first capacitor. The current mirror is coupled to the first capacitor and the primary side of a primary-side switch. The current mirror generates a copy current, thereby generating a copy voltage across the first capacitor. When the drive controller turns on the primary-side switch, the sample-and-hold circuit drives the discharge-controlled current source to sample and hold a control current from the constant current and the copy current. When the node voltage is higher than the copy voltage, the comparison circuit drives the drive controller to turn off the primary-side switch.

Abstract: A bidirectional hybrid power conversion system includes a symmetric hybrid unit, a transient state detection unit, a conversion control unit, and a feedback unit. The symmetric hybrid unit converts an input voltage into an output voltage with different conversion ratios. The feedback unit generates a feedback signal according to the output voltage and a reference voltage. The conversion control unit is connected with the symmetric hybrid unit and the feedback unit controls the symmetric hybrid unit to adjust the conversion ratio for regulating the output voltage according to the feedback signal. The transient state detection unit is connected with the feedback unit and the conversion control unit outputs a detection signal to the conversion unit according to the feedback signal. According to the detection signal, the conversion control unit controls the symmetric hybrid unit adjusts the conversion ratio, and converts the input voltage into the output voltage stably.

Abstract: A driving device includes a first current source, a second current source, a first common-mode current elimination (CMCE) circuit, a second common-mode current elimination (CMCE) circuit, a current-to-voltage converter, and a first comparator. The current sources provide constant currents. The current-to-voltage converter includes a first current mirror and a second current mirror. The control terminal of the first current mirror is coupled to the second CMCE circuit. The control terminal of the second current mirror is coupled to the first CMCE circuit. The first current mirror and the second current mirror receive the constant currents, common-mode currents, and differential currents, thereby controlling the first CMCE circuit and the second CMCE circuit to generate a voltage difference that excludes a common-mode voltage corresponding to the common-mode currents. The first comparator receives the voltage difference to drive a field-effect transistor.

Abstract: The present invention provides a programmable low dropout linear regulator using a reference voltage to convert an input voltage into a regulated voltage according to a control signal. The programmable low dropout linear regulator includes an operational amplifier having a negative input coupled to receive the reference voltage, a first transistor having a gate coupled to an output terminal of the operational amplifier and a first source/drain coupled to an output terminal of the regulated voltage, a first impedance coupled between a positive input of the operational amplifier and the output terminal of the regulated voltage, and a second impedance coupled between the positive input of the operational amplifier and a ground. The second impedance includes a second transistor having a gate coupled to receive the control signal.

Abstract: The present invention provides a programmable low dropout linear regulator using a reference voltage to convert an input voltage into a regulated voltage according to a control signal. The programmable low dropout linear regulator includes an operational amplifier having a negative input coupled to receive the reference voltage, a first transistor having a gate coupled to an output terminal of the operational amplifier and a first source/drain coupled to an output terminal of the regulated voltage, a first impedance coupled between a positive input of the operational amplifier and the output terminal of the regulated voltage, and a second impedance coupled between the positive input of the operational amplifier and a ground. The second impedance includes a second transistor having a gate coupled to receive the control signal.