Green switch power supply with standby function and its IC
First Claim
1. A green switch-mode power supply with standby function, comprising:
- a standby switched-mode power supply, comprising a standby converter circuit, a standby feedback circuit, and a standby control circuit; and
a main switched-mode power supply, comprising a main converter circuit, a main feedback circuit, and a main control circuit, wherein said main switched-mode power supply is subjected to a remote control signal to be on/off, wherein said main feedback circuit comprises a main sampling circuit, a main error amplifier, a main isolation circuit, and a remote control circuit, wherein said main control circuit comprises a main pulse adjustable circuit, a main driven circuit and a main switched-mode power supply prohibitive circuit; and
a supplemental circuit, comprising an initiating circuit, a rectifying filter circuit, wherein DC terminal of said standby switched-mode power supply, said standby control circuit, DC input terminal of said main switch-mode power supply and said main control circuit are common grounded; and
a monolithic green switched-mode power supply IC integrated with said standby control circuit, said main control circuit and said initiating circuit of said supplemental circuit, wherein said monolithic green switched-mode power supply IC is activated by said initiating circuit and is power-supplied by said standby switch-mode power supply,wherein said remote control signal is sent to said main control circuit in response to a main error signal for controlling said main switch-mode power supply on/off, wherein when said remote control signal is an “
off”
signal, said remote control circuit force said main error signal being less than a predetermined threshold value, when said remote control signal is an “
on”
signal, said remote control circuit is deactivated, such that said main sampling circuit outputs a voltage signal to said main error amplifier to generate an optically coupled current through said main isolation circuit so as to output a main error signal;
wherein said main error signal is monitored by said main switched-mode power supply prohibitive circuit, when said main error signal is smaller than said threshold value, said remote control signal is assumed to be said “
off”
signal, such that said switched-mode power supply prohibitive circuit forces said main driven circuit to output a low electric level so as to switch off said main switch-mode power supply, and when said main error signal is not smaller than said threshold value, said remote control signal is assumed to be said “
on”
signal, that said main pulse adjustable circuit generates a main pulse in responsive to said main error signal, such that said main driven circuit is normally operating to switch on said main switch-mode power supply.
1 Assignment
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Accused Products
Abstract
A switch power supply with standby function is disclosed. The power supply can satisfy the need of the green environment protection. And a single ended green switch power supply IC or thick film or modular circuit design with standby function is disclosed, too. It comprises a standby power supply, a main power supply, a PFC device, and a supplemental circuit, wherein a remote control signal is transmitted to main control circuit in response to a main error signal to control main power supply. A method for preventing switch power current from overload and saturation is disclosed too. Finally, the present invention also provides a green power supply with standby function as well as its IC associated with digital processing highly qualified PFC, and a PC standard (such as ATX, ATX12, SSI) computer switch power supply.
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Citations
5 Claims
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1. A green switch-mode power supply with standby function, comprising:
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a standby switched-mode power supply, comprising a standby converter circuit, a standby feedback circuit, and a standby control circuit; and a main switched-mode power supply, comprising a main converter circuit, a main feedback circuit, and a main control circuit, wherein said main switched-mode power supply is subjected to a remote control signal to be on/off, wherein said main feedback circuit comprises a main sampling circuit, a main error amplifier, a main isolation circuit, and a remote control circuit, wherein said main control circuit comprises a main pulse adjustable circuit, a main driven circuit and a main switched-mode power supply prohibitive circuit; and a supplemental circuit, comprising an initiating circuit, a rectifying filter circuit, wherein DC terminal of said standby switched-mode power supply, said standby control circuit, DC input terminal of said main switch-mode power supply and said main control circuit are common grounded; and a monolithic green switched-mode power supply IC integrated with said standby control circuit, said main control circuit and said initiating circuit of said supplemental circuit, wherein said monolithic green switched-mode power supply IC is activated by said initiating circuit and is power-supplied by said standby switch-mode power supply, wherein said remote control signal is sent to said main control circuit in response to a main error signal for controlling said main switch-mode power supply on/off, wherein when said remote control signal is an “
off”
signal, said remote control circuit force said main error signal being less than a predetermined threshold value, when said remote control signal is an “
on”
signal, said remote control circuit is deactivated, such that said main sampling circuit outputs a voltage signal to said main error amplifier to generate an optically coupled current through said main isolation circuit so as to output a main error signal;
wherein said main error signal is monitored by said main switched-mode power supply prohibitive circuit, when said main error signal is smaller than said threshold value, said remote control signal is assumed to be said “
off”
signal, such that said switched-mode power supply prohibitive circuit forces said main driven circuit to output a low electric level so as to switch off said main switch-mode power supply, and when said main error signal is not smaller than said threshold value, said remote control signal is assumed to be said “
on”
signal, that said main pulse adjustable circuit generates a main pulse in responsive to said main error signal, such that said main driven circuit is normally operating to switch on said main switch-mode power supply. - View Dependent Claims (2, 3, 4, 5)
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Specification