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AssigneeFremont Micro Devices Corporation
InventorsYuquan Huang, Chong Huang, Kelvin Yupak Hui
Estimating the term…
Disclosed by present disclosure are a Darlington transistor drive circuit, a Darlington transistor drive method and a switching power supply management chip. In this embodiment, the Darlington transistor is driven sectionally. At the beginning of the switching-on cycle, the driving of the primary transistor is not started temporarily, instead the drive source is used to drive the secondary transistor. After the secondary transistor is completely switched on, the drive source of the secondary transistor is switched off and the drive source of the primary transistor is switched on to drive the Darlington transistor. The primary and secondary transistor have been completely switched on, and the drive current of the secondary transistor never depend on the primary transistor, so the voltage at the input terminal of the secondary transistor can be smaller than the voltage at the control terminal of the secondary transistor. Such that the switching-on power loss is reduced.
A Darlington transistor drive circuit configured to drive a Darlington transistor, which comprises a primary transistor and a secondary transistor, to operate alternately in a switching-on cycle and a switching-off cycle;
A switching power supply management chip which comprises a Darlington transistor drive circuit, wherein the Darlington transistor drive circuit is configured to drive a Darlington transistor, which comprises a primary transistor and a secondary transistor, to operate alternately in a switching-on cycle and a switching-off cycle;
A Darlington transistor drive method applied to a Darlington transistor which comprises a primary transistor and a secondary transistor;
Dependencies are inferred from the claim text.