CN213243589U - Power supply circuit of electronic equipment - Google Patents
Power supply circuit of electronic equipment Download PDFInfo
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- CN213243589U CN213243589U CN202022110291.3U CN202022110291U CN213243589U CN 213243589 U CN213243589 U CN 213243589U CN 202022110291 U CN202022110291 U CN 202022110291U CN 213243589 U CN213243589 U CN 213243589U
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Abstract
The utility model discloses an electronic equipment's supply circuit, include: USB interface unit, lithium battery charging unit, voltage stabilizing unit, lithium cell and power supply control unit, USB interface unit respectively with power supply control unit, lithium battery charging unit electric connection, the lithium cell respectively with lithium battery charging unit, power supply control unit electric connection, power supply control unit with voltage stabilizing unit electric connection, lithium battery charging unit is used for charging for the lithium cell, voltage stabilizing unit is used for exporting 3.3V's power. The circuit of the utility model is simplified as a whole, has lower cost, can reduce the whole heat productivity and reduce the cost of the electronic equipment; the protection chip realizes functions such as overvoltage protection and the like, and prevents the circuit from being damaged.
Description
Technical Field
The utility model relates to the technical field of circuits, especially, relate to an electronic equipment's supply circuit.
Background
With the progress of science and technology and the increasing demands of people, more and more portable devices appear in the lives of people, and in the current power supply circuit of electronic equipment, many problems that overcurrent and overvoltage protection is not available or the circuit is complicated, the cost is high and the like exist, so that the use cost and the cost of the electronic equipment are influenced.
Accordingly, the prior art is deficient and needs improvement.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the not enough of part or whole prior art, provide a power supply circuit of electronic equipment.
The technical scheme of the utility model as follows: the utility model provides an electronic equipment's supply circuit, include: USB interface unit, lithium battery charging unit, voltage regulation unit, lithium cell and power supply control unit, USB interface unit respectively with power supply control unit, lithium battery charging unit electric connection, the lithium cell respectively with lithium battery charging unit, power supply control unit electric connection, power supply control unit with voltage regulation unit electric connection, USB interface unit includes a USB interface and protection chip, the model LP5300 of protection chip, the USB interface includes power pin, the power pin of USB interface respectively with the input of protection chip, the one end electric connection of two-way zener diode, the output and the USB5V end electric connection of protection chip, lithium battery charging unit includes a management chip that charges, the model of management chip that charges is LP4062, the fourth pin of management chip that charges respectively with the USB5V end, One end of a first capacitor is electrically connected, a fifth pin of the charging management chip is electrically connected with a second resistor, a third pin of the charging management chip is electrically connected with the anode of the lithium battery and the second capacitor respectively, the second pin of the charging management chip, the other end of the first capacitor, the other end of the second resistor and the other end of the second capacitor are all grounded, the power supply control unit comprises a first diode, a second diode, a three-terminal diode, a first key and a second key, the anode of the first diode is electrically connected with the USB5V, the anode of the second diode is electrically connected with the anode of the lithium battery, the cathode of the first diode and the cathode of the second diode are both electrically connected with the VMCU end, the model of the three-terminal diode is BAT54C, the first anode of the three-terminal diode is electrically connected with the USB _ PWR end, the second positive pole of the three-terminal diode respectively with the one end of second button, the one end electric connection of third resistance, the other end of second button with VMCU end electric connection, the other end and START _ KEY end electric connection of third resistance, the negative pole of three-terminal diode and the one end electric connection of fourth resistance, the other end of fourth resistance respectively with the one end of fifth resistance, the one end of first button, PWR _ EN end electric connection, the other end of first button, the other end of fifth resistance all ground connection, the input of voltage stabilizing unit with VMCU end electric connection, voltage stabilizing unit is used for exporting 3.3V's power.
Further, the voltage stabilization unit includes a dc-to-dc voltage stabilization chip.
Furthermore, the model of the voltage stabilizing chip is LP3220, a fourth pin of the voltage stabilizing chip is electrically connected to the VMCU end, one end of the third capacitor, and one end of the fourth capacitor, respectively, the other end of the third capacitor and the other end of the fourth capacitor are both grounded, the first pin of the voltage stabilizing chip is electrically connected to one end of the sixth resistor, the other end of the sixth resistor is electrically connected to the PWR _ EN end, the third pin of the voltage stabilizing chip is electrically connected to one end of the inductor, the other end of the inductor is electrically connected to one end of the fifth capacitor, one end of the sixth capacitor, one end of the seventh resistor, and the 3.3V end, respectively, the other end of the fifth capacitor, the other end of the seventh resistor, and one end of the first resistor are all electrically connected to the fifth pin of the voltage stabilizing chip, and the second pin of the voltage stabilizing chip, the other end of the first resistor, the fifth pin of the voltage stabilizing chip, the second pin of the first resistor, The other end of the sixth capacitor, the other end of the seventh capacitor and the other end of the eighth capacitor are all grounded.
Adopt above-mentioned scheme, the beneficial effects of the utility model reside in that: the circuit of the utility model is simplified as a whole, has lower cost, can reduce the whole heat productivity and reduce the cost of the electronic equipment; the protection chip realizes functions such as overvoltage protection and the like, and prevents the circuit from being damaged.
Drawings
Fig. 1 is a block diagram of the present invention.
Fig. 2 is a circuit diagram of the USB interface unit of the present invention.
Fig. 3 is a circuit diagram of the lithium battery charging unit of the present invention.
Fig. 4 is a circuit diagram of a lithium battery according to the present invention.
Fig. 5 is a circuit diagram of the power supply control unit of the present invention.
Fig. 6 is a circuit diagram of the voltage stabilizing unit of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1 to fig. 6, in the present embodiment, the present invention provides a power supply circuit of an electronic device, including: USB interface unit 1, lithium battery charging unit 2, voltage stabilizing unit 5, lithium cell 3 and power supply control unit 4, USB interface unit 1 respectively with power supply control unit 4, lithium battery charging unit 2 electric connection, lithium cell 3 respectively with lithium battery charging unit 2, power supply control unit 4 electric connection, power supply control unit 4 with voltage stabilizing unit 5 electric connection. Referring to fig. 2, the USB interface unit 1 includes a USB interface and a protection chip U9, the protection chip U9 is model LP5300, and the protection chip U9 is used for over-current and over-voltage protection. The USB interface comprises a power pin, the power pin of the USB interface is electrically connected with the input end of the protection chip U9 and one end of the bidirectional voltage-stabilizing diode T5, and the output end of the protection chip U9 is electrically connected with the USB 5V. Referring to fig. 3, the lithium battery charging unit 2 is configured to charge the lithium battery 3, and includes a charging management chip U8, where the model of the charging management chip U8 is LP4062, a fourth pin of the charging management chip U9 is electrically connected to the USB5V terminal and one end of a first capacitor C1, a fifth pin of the charging management chip U9 is electrically connected to a second resistor R2, a third pin of the charging management chip U9 is electrically connected to the anode of the lithium battery 3 and the second capacitor C2, and a second pin of the charging management chip U9, the other end of the first capacitor C1, the other end of the second resistor R2, and the other end of the second capacitor C2 are all grounded. Referring to fig. 4, the lithium battery 3 is connected to the circuit through an interface J3. The power supply control unit 4 comprises a first diode D1, a second diode D2, a three-terminal diode D4, a first KEY K1 and a second KEY K2, wherein the anode of the first diode D1 is electrically connected with the USB5V end, the anode of the second diode D2 is electrically connected with the anode of the lithium battery 3, the cathode of the first diode D1 and the cathode of the second diode D3 are both electrically connected with the VMCU end, the model of the three-terminal diode D4 is BAT54C, the first anode of the three-terminal diode D4 is electrically connected with the USB _ PWR end, the second anode of the three-terminal diode D4 is respectively electrically connected with one end of the second KEY K2 and one end of a third resistor R3, the other end of the second KEY K2 is electrically connected with the VMCU end, the other end of the third resistor R3 is electrically connected with the T _ KEY end, and the cathode of the first terminal of the fourth resistor R4, the other end of the fourth resistor R4 is respectively and electrically connected with one end of the fifth resistor R5, one end of the first key K1 and the PWR _ EN end, and the other end of the first key K1 and the other end of the fifth resistor R5 are both grounded. The input end of the voltage stabilizing unit 5 is electrically connected with the end of the VMCU, and the voltage stabilizing unit 5 is used for outputting a 3.3V power supply. In this embodiment, the first KEY K1 is a reset switch, the second KEY K2 is a power switch, the USB _ PWR terminal, the START _ KEY terminal, and the PWR _ EN terminal are electrically connected to a main control module of the electronic device, and the first KEY K1 and the second KEY K2 can be used to control the electronic device to operate.
Referring to fig. 6, in detail, in the present embodiment, the voltage stabilizing unit 5 includes a dc-to-dc voltage stabilizing chip U7, with a model number LP 3220. A fourth pin of the voltage stabilizing chip U7 is electrically connected to the VMCU terminal, one end of a third capacitor C3, and one end of a fourth capacitor C4, the other end of the third capacitor C3 and the other end of the fourth capacitor C4 are both grounded, a first pin of the voltage stabilizing chip U7 is electrically connected to one end of a sixth resistor R6, the other end of the sixth resistor R6 is electrically connected to the PWR _ EN terminal, a third pin of the voltage stabilizing chip U7 is electrically connected to one end of the inductor L1, the other end of the inductor L1 is electrically connected to one end of a fifth capacitor C5, one end of the sixth capacitor C6, one end of a seventh capacitor C7, one end of a seventh resistor R7, and the end of a 3.3V terminal, the other end of the fifth capacitor C5, the other end of the seventh resistor R7, and one end of the first resistor R1 are electrically connected to a fifth pin of the voltage stabilizing chip, and the other end of the voltage stabilizing chip R1 and the first pin of the voltage stabilizing chip are electrically connected to the fifth pin of the fifth capacitor C1 and the second, The other end of the sixth capacitor C6, the other end of the seventh capacitor C7 and the other end of the eighth capacitor are all grounded.
In this scheme, external power supplies power through the USB interface, protection chip U9 can be used for overcurrent and overvoltage protection, prevents that electric current and voltage are too big to cause the damage to the circuit, and external power can charge for lithium cell 3 through lithium cell charging unit 2. The lithium battery 3 may also be used for power supply of the electronic device, and the first key K1 and the second key K2 may be used for controlling the electronic device. The voltage stabilizing unit 5 can provide stable direct current voltage, and an external power supply or a power supply of a lithium battery is converted into a 3.3V power supply through the voltage stabilizing unit 5 so as to supply the equipment with work.
In summary, the circuit of the utility model is simplified as a whole, has lower cost, and can reduce the whole heat productivity and the cost of the electronic equipment; the protection chip realizes functions such as overvoltage protection and the like, and prevents the circuit from being damaged.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (3)
1. A power supply circuit for an electronic device, comprising: USB interface unit, lithium battery charging unit, voltage regulation unit, lithium cell and power supply control unit, USB interface unit respectively with power supply control unit, lithium battery charging unit electric connection, the lithium cell respectively with lithium battery charging unit, power supply control unit electric connection, power supply control unit with voltage regulation unit electric connection, USB interface unit includes a USB interface and protection chip, the model LP5300 of protection chip, the USB interface includes power pin, the power pin of USB interface respectively with the input of protection chip, the one end electric connection of two-way zener diode, the output and the USB5V end electric connection of protection chip, lithium battery charging unit includes a management chip that charges, the model of management chip that charges is LP4062, the fourth pin of management chip that charges respectively with the USB5V end, One end of a first capacitor is electrically connected, a fifth pin of the charging management chip is electrically connected with a second resistor, a third pin of the charging management chip is electrically connected with the anode of the lithium battery and the second capacitor respectively, the second pin of the charging management chip, the other end of the first capacitor, the other end of the second resistor and the other end of the second capacitor are all grounded, the power supply control unit comprises a first diode, a second diode, a three-terminal diode, a first key and a second key, the anode of the first diode is electrically connected with the USB5V, the anode of the second diode is electrically connected with the anode of the lithium battery, the cathode of the first diode and the cathode of the second diode are both electrically connected with the VMCU end, the model of the three-terminal diode is BAT54C, the first anode of the three-terminal diode is electrically connected with the USB _ PWR end, the second positive pole of the three-terminal diode respectively with the one end of second button, the one end electric connection of third resistance, the other end of second button with VMCU end electric connection, the other end and START _ KEY end electric connection of third resistance, the negative pole of three-terminal diode and the one end electric connection of fourth resistance, the other end of fourth resistance respectively with the one end of fifth resistance, the one end of first button, PWR _ EN end electric connection, the other end of first button, the other end of fifth resistance all ground connection, the input of voltage stabilizing unit with VMCU end electric connection, voltage stabilizing unit is used for exporting 3.3V's power.
2. The power supply circuit of the electronic device according to claim 1, wherein the voltage regulation unit comprises a dc to dc voltage regulation chip.
3. The power supply circuit of the electronic device according to claim 2, wherein the model of the voltage regulator chip is LP3220, a fourth pin of the voltage regulator chip is electrically connected to the VMCU terminal, one terminal of the third capacitor, and one terminal of the fourth capacitor, respectively, the other terminal of the third capacitor and the other terminal of the fourth capacitor are both grounded, the first pin of the voltage regulator chip is electrically connected to one terminal of a sixth resistor, the other terminal of the sixth resistor is electrically connected to the PWR _ EN terminal, the third pin of the voltage regulator chip is electrically connected to one terminal of an inductor, the other terminal of the inductor is electrically connected to one terminal of a fifth capacitor, one terminal of the sixth capacitor, one terminal of the seventh resistor, and the 3.3V terminal, respectively, the other terminal of the fifth capacitor, the other terminal of the seventh resistor, and one terminal of the first resistor are all electrically connected to the fifth pin of the voltage regulator chip, and the second pin of the voltage stabilizing chip, the other end of the first resistor, the other end of the sixth capacitor, the other end of the seventh capacitor and the other end of the eighth capacitor are all grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022110291.3U CN213243589U (en) | 2020-09-22 | 2020-09-22 | Power supply circuit of electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022110291.3U CN213243589U (en) | 2020-09-22 | 2020-09-22 | Power supply circuit of electronic equipment |
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| CN213243589U true CN213243589U (en) | 2021-05-18 |
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| CN202022110291.3U Active CN213243589U (en) | 2020-09-22 | 2020-09-22 | Power supply circuit of electronic equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113675815A (en) * | 2021-08-25 | 2021-11-19 | 深圳市杰芯创电子科技有限公司 | Power supply management system and method |
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2020
- 2020-09-22 CN CN202022110291.3U patent/CN213243589U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113675815A (en) * | 2021-08-25 | 2021-11-19 | 深圳市杰芯创电子科技有限公司 | Power supply management system and method |
| CN113675815B (en) * | 2021-08-25 | 2023-09-01 | 深圳市拓邦威电子科技有限公司 | Power supply management system and method |
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