Flyback type power supply control system
A technology of power control and power controller, which is applied in the direction of control/regulation system, electrical components, and adjustment of electrical variables, etc., can solve the problems of many peripheral circuits, large control chip packaging volume, and large power supply volume, so as to reduce complexity, Reduce system application cost and multi-safety protection effect
A technology of power control and power controller, which is applied in the direction of control/regulation system, electrical components, and adjustment of electrical variables, etc., can solve the problems of many peripheral circuits, large control chip packaging volume, and large power supply volume, so as to reduce complexity, Reduce system application cost and multi-safety protection effect
CN107147294AInactive Publication Date: 2017-09-08成都启臣微电子股份有限公司
Image
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0017] refer to figure 1 , is a schematic diagram of the principle of the flyback power supply control system according to the first embodiment of the present invention. The flyback power supply control system of this embodiment is mainly applied to an AC-DC power supply system, which includes a transformer T, a power tube M, a diode D, a first resistor R1, a second resistor R2, a third resistor R3 and a power controller 10 . One end of the primary winding o...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a flyback type power supply control system. The flyback type power supply control system comprises a transformer, a power tube, a diode, a first resistor, a second resistor, a third resistor and a power supply controller, wherein one end of a primary winding of the transformer is connected with an input system voltage, the other end of the primary winding is connected with a drain end of the power tube, a source end of the power tube is connected with the ground through the first resistor, one end of an auxiliary winding of the transformer is connected with the ground, the other end of the auxiliary winding sequentially passes through the diode, the third resistor and the second resistor and is connected with the source end of the power tube, the power supply controller is provided with a sampling end and a control end, the sampling end is connected between the third resistor and the second resistor, the control end is connected with a gate end of the power tube, and the power supply controller is used for driving the power tube to be periodically switched on, acquiring a detection voltage during switch-on and switch-off periods of the power tube, judging whether the working condition is an abnormal sate or not according to the detection voltage and driving the power tube to be switched off when the working condition is judged to be an abnormal state. By the mode, more safety protection can be achieved by using a few pins.
Description
technical field [0001] The invention relates to the technical field of basic electronic circuits, in particular to a flyback power supply control system. Background technique [0002] The flyback power supply system is more and more widely used in the existing power supply system, so its safety and reliability are also paid more attention by users. The safety standards of various countries also require the safety and security of power supply products and household appliances. Various tests and specifications are performed for reliability. [0003] In the application of the current flyback power supply system, the small size has become an important factor to attract more manufacturers to use. In the existing flyback topology applications, especially in secondary side flyback applications, output overvoltage protection, external overtemperature protection, etc. are required, and in some power systems, the leading edge of the peak current of the primary winding of the transfor...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
08 Sep 2017
Publication
CN107147294A
- IPC
- H02M3/335; H02M1/08; H02H7/10
- CPC
- H02H7/10; H02M1/08; H02M3/33523
- Inventors
- 许刚颍; 唐波