Direct current (DC)-DC converter
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SPI ELECTRONICS
- Publication Date
- 2015-04-22
Smart Images
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Abstract
Description
technical field
[0001] The invention relates to a power supply device, and in particular to a high-efficiency DC-to-DC converter with buck-boost function. Background technique
[0002] Traditionally, in order to stably / accurately provide the power supply voltage required by loads (such as electronic devices), most DC-to-DC converters are designed with a buck-boost function. figure 1 It is a schematic circuit diagram of a conventional DC-to-DC converter 100 with a buck-boost function. Please refer to figure 1 , the DC-to-DC converter 100 includes a transformer TX with an isolation function, a switch SW, a capacitor C, a diode D, and a voltage feedback controller VF.
[0003] Generally speaking, the voltage feedback controller VF will continuously detect the power supply voltage Vpwr received by the load LD, and accordingly generate a control signal CS with a variable duty cycle to boost the DC input voltage Vin. ) or buck (buck). In this way, the DC-to-DC converter 100 ca...