Led driver with silicon controlled dimmer, circuit module and control method thereof
AssigneeSilergy Semiconductor Technology (Hangzhou) LTD
InventorsHuiqiang Chen, Jianxin Wang
Life of this patent
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Abstract
An apparatus can include: a bleeder circuit coupled to a DC bus of an LED driver having a silicon-controlled dimmer, where the bleeder circuit is controlled to discharge a current of the DC bus; a controller configured to control the bleeder circuit to discharge the DC bus at a first current after detecting a transition in a voltage of the DC bus; and the controller being configured to control the bleeder circuit to discharge the DC bus at a second current until the DC bus voltage rises to a predetermined load driving voltage, where the second current is less than the first current.
Claims21
A circuit module, applied to an LED driver with a silicon controlled dimmer, comprising:
- a bleeder circuit, connected to a DC bus of said LED driver and controlled to discharge a DC bus current;
- and
- a controller, configured to control said bleeder circuit to discharge at a first current after detecting a jump in a DC bus voltage, and then to discharge at a second current until said DC bus voltage rises to a predetermined load driving voltage;
- wherein, said second current is less than said first current.
A control method, applied to control a bleeder circuit of an LED driver having a silicon controlled dimmer, said control method comprising:
- controlling said bleeder circuit to discharge at a first current after detecting a jump in a DC bus voltage;
- and,
- controlling said bleeder circuit to discharge at a second current until said DC bus voltage rises to a predetermined load driving voltage;
- wherein said second current is less than said first current.
Dependencies are inferred from the claim text.