Automobile power supply circuit and external storage equipment reading system
A technology for external storage devices and power supply circuits, which is applied in the direction of vehicle components, transducer circuits, circuits or fluid pipelines, etc., can solve the problem of small power supply current, achieve smooth reading, improve power supply current, and automotive power supply circuits The effect of program stabilization
Inactive Publication Date: 2018-01-26
CHERY AUTOMOBILE CO LTD
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Problems solved by technology
[0003] The present invention designs a car power supply circuit and an external storage device reading system, which solves the problem that the power supply current of the existing car power supply circuit is relatively small
Method used
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[0017] Below in conjunction with accompanying drawing, the present invention will be further described:
[0018] figure 1 A car power supply circuit is shown, including a power management chip LM29152, a diode D1, a resistor R1, a first capacitor C1, a fourth capacitor C4, and a first branch, a second branch and a third branch; the first branch The road is connected to the first pin b of the power management chip LM29152, and the other end is connected to the first power supply ACC1 of the car; the diode D1 is set on the first branch road, and the cathode of the diode D1 is connected to the first power supply ACC1 of the car; the second branch One end of the road is connected to the second pin d of the power management chip LM29152, and the other end is connected to the first branch, and is located between the first power supply ACC1 of the car and the diode D1, that is, the connection between the second branch and the first branch The point is located between the power suppl...
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The invention relates to an automobile power supply circuit. The automobile power supply circuit comprises a power management chip LM29152, a diode, a resistor, a first capacitor, a fourth capacitor,a first branch, a second branch and a third branch, wherein the first branch is connected with a first pin of the power management chip LM29152, and the other end is connected with a first-end power supply of an automobile; the diode is arranged on the first branch; a negative electrode of the diode is connected with the first-end power supply of the automobile; one end of the second branch is connected with a second pin of the power management chip LM29152, and the other end is connected with the first branch and positioned between the first-end power supply of the automobile and the diode; the capacitor is arranged on the second branch; the resistor is arranged between the first capacitor and the second pin; one end of the third branch is connected with a second power supply of the automobile and the other end is connected with the second pin; and the fourth capacitor is arranged on the third branch. Through adoption of the scheme, an integrated chip supporting the maximum current of3A is arranged in a vehicle-mounted audible device in an automobile entertainment system, so that the function of a product is enhanced greatly, and the demands of a user are met.
Description
technical field [0001] The invention belongs to the technical field of automobiles, and in particular relates to an automobile power supply circuit and an external storage device reading system. Background technique [0002] At present, the external storage devices supported by the car audio system, such as U disk, generally have a reading current of 500mA. With the increasing capacity of storage devices, such as mobile phones and mobile hard disks, the reading current that the car audio system needs to support The bigger it is, the function of the current audio entertainment system is far from meeting the needs of users on the power supply, and the utilization rate of the car entertainment system is relatively low. Contents of the invention [0003] The invention designs an automobile power supply circuit and an external storage device reading system, which solves the problem of relatively small power supply current of the existing automobile power supply circuit. [000...
Claims
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IPC IPC(8): H04R3/00B60R16/03
Inventor 殷秀梅
Owner CHERY AUTOMOBILE CO LTD