摘要:
A power control system (25) uses two separate currents to control a startup operation of the power control system (25). The two currents are shunted to ground to inhibit operation of the power control system (25) and one of the two currents is disabled to minimize power dissipation. The two independently controlled currents are generated by a multiple output current high voltage device (12) responsively to two separate control signals (23,24).
摘要:
A one-time programmable memory includes a first one-time programmable memory cell including a fuse core having an input terminal for receiving a trim signal, an output terminal for providing a sense signal, and a fuse. The fuse core conducts current through the fuse in response to the trim signal. The one-time programmable memory cell also includes a sense circuit having an input terminal coupled to the output terminal of the fuse core, and an output terminal for providing a termination signal, and a logic circuit having a first input terminal for receiving a program enable signal, a second input terminal for receiving a data signal, a third input terminal coupled to the output terminal of the sense circuit for receiving the termination signal, and an output terminal coupled to the input terminal of the fuse core for providing the trim signal.
摘要:
A power control system (25) uses two separate currents to control a startup operation of the power control system (25). The two currents are shunted to ground to inhibit operation of the power control system (25) and one of the two currents is disabled to minimize power dissipation. The two independently controlled currents are generated by a multiple output current high voltage device (12) responsively to two separate control signals (23, 24).
摘要:
A regulated self-supply power controller for a switched-mode power supply includes an operational voltage supply line having a voltage magnitude that varies between two voltage magnitudes. A controllable power source is intermittently coupled to a capacitor, which is coupled to the operational voltage supply line, on the basis of the variation of the operational voltage supply line voltage magnitude between the two voltage magnitudes.
摘要:
A one-time programmable memory includes a first one-time programmable memory cell including a fuse core having an input terminal for receiving a trim signal, an output terminal for providing a sense signal, and a fuse. The fuse core conducts current through the fuse in response to the trim signal. The one-time programmable memory cell also includes a sense circuit having an input terminal coupled to the output terminal of the fuse core, and an output terminal for providing a termination signal, and a logic circuit having a first input terminal for receiving a program enable signal, a second input terminal for receiving a data signal, a third input terminal coupled to the output terminal of the sense circuit for receiving the termination signal, and an output terminal coupled to the input terminal of the fuse core for providing the trim signal.
摘要:
A power control system uses two separate currents to control a startup operation of the power control system. One of the currents has a small value and is used to charge an output voltage to an initial value. Once the initial value is reached, a second current that has a large value is used to charge the output voltage to an operating voltage value.
摘要:
A power control system (25) uses two separate currents to control a startup operation of the power control system (25). The two currents are shunted to ground to inhibit operation of the power control system (25) and one of the two currents is disabled to minimize power dissipation. The two independently controlled currents are generated by a multiple output current high voltage device (12) responsively to two separate control signals (23,24).
摘要:
A controller oscillator provides a periodic output signal having first and second output level states. The oscillator is responsive to an applied saw tooth signal that varies between first and second voltages (Vlow,Vhigh). The oscillator is comprised of a comparator (82) the non-inverting input of which receives the saw tooth signal applied thereto to produce the periodic output signal at its output (86). A first voltage reference circuit (88, 90, and 92) generates the second voltage (Vhigh) that is applied to the inverting input of the comparator while the periodic output signal is at the first output level state and the input signal charges from the first voltage (Vlow) towards the second voltage. As the input signal becomes equal to the second voltage the output of the comparator switches to the second output level state and a second voltage reference (92,94, 96) provides the first voltage at the inverting input of the comparator.
摘要:
A circuit includes a first control output adapted to couple to a control terminal of a first transistor and a second control output adapted to couple to a control terminal of a second transistor. The circuit further includes a feedback input for receiving a signal and a control circuit. The control circuit is configured to independently control first and second on-times of control signals applied to the first and second control outputs, respectively, in response to receiving the signal to limit a current at an output node.
摘要:
In one embodiment, a high voltage element is formed overlying a doped semiconductor region that can be depleted during the operation of the high voltage element includes a conductor overlying a space in a resistor.