Low-cost timing detection circuit and DSP power supply circuit
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN FENDA TECH CO LTD
- Filing Date
- 2025-07-15
- Publication Date
- 2026-08-07
AI Technical Summary
[0006]针对上述问题，提出一种低成本的时序检测电路及DSP电源电路，通过设置第一开关检测电路、第二开关检测电路，将利用第一开关检测电路用于在检测到Type-C接口电源电路的电压下降到规定阈值后，输出高电平信号到所述第二开关检测电路，第二开关检测电路在收到所述高电平信号后，输出低电平信号到所述DSP电源芯片，以关闭DSP电源，从而可以在Type-C接口电源电路突然断电时，DSP电源电路进行有效的关机操作，解决了电子产品在插拔TYPE C电源时因掉电时序不符合DSP规格要求，造成无法进行正常关机工作的问题
[0051]电源芯片；
Smart Images
Figure CN224609468U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of DSP power supply circuit technology, and in particular to a low-cost timing detection circuit and DSP power supply circuit. Background Technology
[0002] A typical DSP system power supply consists of multiple power supplies. The DSP system power supply is a crucial component ensuring the stable operation of the DSP chip and its peripheral circuits. Its design must meet the DSP's requirements in terms of voltage, current, noise, and ripple. DSPs typically require multiple independent voltages, such as core voltage (e.g., 1.2V, 1.8V) and I / O voltage (e.g., 3.3V). During DSP operation, the current changes rapidly with the computational load (potentially jumping from tens of mA to several A), requiring the power supply to have a fast response capability to avoid excessive voltage fluctuations.
[0003] Currently, when shutting down the power supply of a DSP system, the power-down timing requirements of its specifications must be met in order to perform a normal shutdown operation. However, if the external power supply suddenly fails and the software system is unable to perform an effective shutdown operation, then a hardware circuit detection is required to perform an effective shutdown.
[0004] Specifically, when plugging and unplugging the TYPE C power supply, the electronic product cannot shut down normally because the power-down timing does not meet the DSP specifications. Utility Model Content
[0005] In the prior art, electronic products cannot perform normal shutdown when plugging and unplugging the TYPE C power supply because the power-down timing does not meet the DSP specifications.
[0006] To address the aforementioned issues, a low-cost timing detection circuit and DSP power supply circuit are proposed. By setting up a first switch detection circuit and a second switch detection circuit, the first switch detection circuit outputs a high-level signal to the second switch detection circuit after detecting a voltage drop in the Type-C interface power circuit to a specified threshold. Upon receiving the high-level signal, the second switch detection circuit outputs a low-level signal to the DSP power chip to shut down the DSP power supply. This allows the DSP power supply circuit to effectively shut down when the Type-C interface power circuit suddenly loses power, solving the problem of electronic products failing to shut down properly due to power-down timing not meeting DSP specifications when plugging and unplugging the Type-C power supply.
[0007] Firstly, a low-cost timing detection circuit includes:
[0008] First switch detection circuit;
[0009] Second switch detection circuit;
[0010] The first switch detection circuit is electrically connected to both the Type-C interface power circuit and the second switch detection circuit.
[0011] The output of the second switch detection circuit is electrically connected to the enable pin of the DSP power chip.
[0012] The first switch detection circuit is used to output a high-level signal to the second switch detection circuit after detecting that the voltage of the Type-C interface power circuit has dropped to a specified threshold.
[0013] After receiving the high-level signal, the second switch detection circuit outputs a low-level signal to the DSP power chip to turn off the DSP power supply.
[0014] In conjunction with the low-cost timing detection circuit described in this utility model, in a first possible embodiment, the first switch detection circuit includes:
[0015] First transistor;
[0016] Emitter circuit;
[0017] Base circuit;
[0018] The emitter circuit is electrically connected to the emitter of the first transistor;
[0019] The base circuit is electrically connected to the base of the first transistor;
[0020] The collector of the first transistor is electrically connected to the second switch detection circuit.
[0021] In conjunction with the first possible embodiment of this utility model, in the second possible embodiment, the emitter circuit includes:
[0022] A first diode, a first capacitor, a first resistor, and a second resistor;
[0023] The anode of the first diode is electrically connected to the Type-C interface power circuit, the cathode of the first diode is electrically connected to the first terminal of the first capacitor, the first terminal of the first resistor and the first terminal of the second resistor, the second terminal of the first capacitor is grounded, the second terminal of the first resistor is electrically connected to the base of the first transistor, and the second terminal of the second resistor is electrically connected to the emitter of the first transistor.
[0024] In conjunction with the second possible embodiment of this utility model, and in the third possible embodiment, the base circuit includes:
[0025] The second diode, the second capacitor, the third resistor, and the third diode;
[0026] The anode of the second diode is electrically connected to the Type-C interface power circuit, the cathode of the second diode is electrically connected to the first terminal of the second capacitor and the first terminal of the third resistor, the second terminal of the second capacitor is grounded, and the second terminal of the third resistor is electrically connected to the anode of the third diode and the base of the first transistor.
[0027] The cathode of the third diode is electrically connected to the Type-C interface power circuit.
[0028] In conjunction with the first possible embodiment of this utility model, in the fourth possible embodiment, the second switch detection circuit includes:
[0029] The fourth resistor and the second transistor;
[0030] The first end of the fourth resistor is electrically connected to the collector of the first transistor, and the second end of the fourth resistor is electrically connected to the base of the second transistor.
[0031] The emitter of the second transistor is grounded.
[0032] Secondly, a DSP power supply circuit employs the low-cost timing detection circuit described in the first aspect, comprising:
[0033] Type-C interface power supply circuit;
[0034] DSP power supply control circuit;
[0035] The Type-C interface power circuit is electrically connected to the first switch detection circuit;
[0036] The DSP power control circuit and the second switch detection circuit are used to switch the power supply on and off according to the level signal of the second switch detection circuit.
[0037] In conjunction with the DSP power supply circuit described in the second aspect of this utility model, in a first possible embodiment, the Type-C interface power supply circuit includes:
[0038] Type-C interface;
[0039] Voltage regulator circuit;
[0040] Filtering circuit;
[0041] The voltage regulator circuit, the filter circuit, and the Type-C interface are electrically connected to the power input terminal of the DSP power control circuit.
[0042] In conjunction with the first possible embodiment of the second aspect of this utility model, in the second possible embodiment, the voltage regulator circuit includes:
[0043] First Zener diode;
[0044] The cathode of the first Zener diode is electrically connected to the power input terminal of the filter circuit, the Type-C interface, and the DSP power control circuit.
[0045] The anode of the first Zener diode is grounded.
[0046] In conjunction with the first possible embodiment of the second aspect of this utility model, and in the third possible embodiment, the filter circuit includes:
[0047] Third capacitor, fourth capacitor, fifth capacitor;
[0048] The first terminals of the third, fourth, and fifth capacitors are electrically connected to the power input terminals of the voltage regulator circuit, the Type-C interface, and the DSP power control circuit.
[0049] The second terminals of the third, fourth, and fifth capacitors are grounded.
[0050] In conjunction with the first possible embodiment of the second aspect of this utility model, and in the third possible embodiment, the DSP power supply control circuit includes:
[0051] Power chip;
[0052] The power chip includes an enable level input pin;
[0053] The enable level input pin is electrically connected to the collector of the second transistor.
[0054] The low-cost timing detection circuit and DSP power supply circuit described in this utility model, by setting a first switch detection circuit and a second switch detection circuit, utilizes the first switch detection circuit to output a high-level signal to the second switch detection circuit after detecting that the voltage of the Type-C interface power circuit has dropped to a specified threshold. Upon receiving the high-level signal, the second switch detection circuit outputs a low-level signal to the DSP power chip to shut down the DSP power supply. This allows the DSP power supply circuit to perform an effective shutdown operation when the Type-C interface power circuit suddenly loses power, solving the problem that electronic products cannot perform normal shutdown operations when plugging and unplugging the Type-C power supply because the power-down timing does not meet the DSP specification requirements. Attached Figure Description
[0055] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0056] Figure 1 This is a schematic diagram of the module connection of the DSP power supply circuit in this utility model;
[0057] Figure 2 This is a circuit diagram of the DSP power supply circuit in this utility model;
[0058] Components and their serial numbers:
[0059] 100 – Type-C interface power supply circuit, 200 – First switch detection circuit, 300 – Second switch detection circuit, 400 – DSP power control circuit. Detailed Implementation
[0060] The technical solutions of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, other embodiments obtained by those skilled in the art without creative effort are all within the scope of protection of this utility model.
[0061] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0062] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.
[0063] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0064] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0065] In the prior art, electronic products cannot perform normal shutdown when plugging and unplugging the TYPE C power supply because the power-down timing does not meet the DSP specifications.
[0066] To address the above problems, a low-cost timing detection circuit and DSP power supply circuit are proposed.
[0067] Firstly, a low-cost timing detection circuit, such as Figure 1 , Figure 1 This is a schematic diagram of the module connection of the DSP power supply circuit in this utility model; it includes a first switch detection circuit 200 and a second switch detection circuit 300; the first switch detection circuit 200 is electrically connected to both the Type-C interface power supply circuit 100 and the second switch detection circuit 300; the output terminal of the second switch detection circuit 300 is electrically connected to the enable pin of the DSP power chip U1; the first switch detection circuit 200 outputs a high-level signal to the second switch detection circuit 300 after detecting that the voltage of the Type-C interface power supply circuit 100 has dropped to a specified threshold; the second switch detection circuit 300, upon receiving the high-level signal, outputs a low-level signal to the DSP power chip U1 to turn off the DSP power supply. Therefore, when the Type-C interface power supply circuit 100 suddenly loses power, the DSP power supply circuit can perform an effective shutdown operation, solving the problem that electronic products cannot perform normal shutdown operations when plugging and unplugging the Type-C power supply because the power-down sequence does not meet the DSP specification requirements.
[0068] In this embodiment, the first switch detection circuit 200 is used to detect the voltage drop of the Type-C interface power circuit 100. When the voltage drops to a certain threshold range, it outputs a high-level signal to the second switch detection circuit 300 to turn it on. After it is turned on, its low-level signal is transmitted to the enable pin EN of the DSP power control chip U1, thereby turning off the power.
[0069] The Type-C interface power supply circuit 100 supplies power to the DSP power control circuit 400 via VBUS_5V.
[0070] In this embodiment, when VBUS_5V drops to 4.5-4.7V, the collector of the first transistor Q1 goes high, and the collector and emitter of the second transistor Q2 are turned on, transmitting a low-level signal to the enable pin of the DSP power chip U1. This ensures that the DSP power supply is turned off before VBUS_5V drops below 4.5V, thus meeting the DSP power-down timing specifications.
[0071] In one possible implementation, such as Figure 2 , Figure 2 This is a circuit diagram of the DSP power supply circuit in this utility model; the first switch detection circuit 200 includes a first transistor Q1, an emitter circuit, and a base circuit; the emitter circuit is electrically connected to the emitter of the first transistor Q1; the base circuit is electrically connected to the base of the first transistor Q1; and the collector of the first transistor Q1 is electrically connected to the second switch detection circuit 300.
[0072] In one possible implementation, the emitter circuit includes a first diode D1, a first capacitor C1, a first resistor R1, and a second resistor R2; the anode of the first diode D1 is electrically connected to the Type-C interface power supply circuit 100, the cathode of the first diode D1 is electrically connected to the first terminal of the first capacitor C1, the first terminal of the first resistor R1, and the first terminal of the second resistor R2, the second terminal of the first capacitor C1 is grounded, the second terminal of the first resistor R1 is electrically connected to the base of the first transistor Q1, and the second terminal of the second resistor R2 is electrically connected to the emitter of the first transistor Q1.
[0073] In one possible implementation, the base circuit includes a second diode D2, a second capacitor C2, a third resistor R3, and a third diode D3; the anode of the second diode D2 is electrically connected to the Type-C interface power supply circuit 100, the cathode of the second diode D2 is electrically connected to the first terminal of the second capacitor C2 and the first terminal of the third resistor R3, the second terminal of the second capacitor C2 is grounded, the second terminal of the third resistor R3 is electrically connected to the anode of the third diode D3 and the base of the first transistor Q1; the cathode of the third diode D3 is electrically connected to the Type-C interface power supply circuit 100.
[0074] In one possible implementation, the second switch detection circuit 300 includes a fourth resistor R4 and a second transistor Q2; the first end of the fourth resistor R4 is electrically connected to the collector of the first transistor Q1, and the second end of the fourth resistor R4 is electrically connected to the base of the second transistor Q2; the emitter of the second transistor Q2 is grounded.
[0075] In this embodiment, by setting a first switch detection circuit 200 and a second switch detection circuit 300, the first switch detection circuit 200 outputs a high-level signal to the second switch detection circuit 300 after detecting that the voltage of the Type-C interface power circuit 100 has dropped to a specified threshold. After receiving the high-level signal, the second switch detection circuit 300 outputs a low-level signal to the DSP power chip U1 to turn off the DSP power. This allows the DSP power circuit to perform an effective shutdown operation when the Type-C interface power circuit 100 suddenly loses power, solving the problem that electronic products cannot perform normal shutdown operation when plugging and unplugging the Type-C power supply because the power-down sequence does not meet the DSP specifications.
[0076] Secondly, a DSP power supply circuit employs the low-cost timing detection circuit of the first aspect, including a Type-C interface power supply circuit 100 and a DSP power control circuit 400; the Type-C interface power supply circuit 100 is electrically connected to a first switch detection circuit 200; the DSP power control circuit 400 and a second switch detection circuit 300 are used to switch the power supply according to the level signal of the second switch detection circuit 300.
[0077] In one possible implementation, the Type-C interface power supply circuit 100 includes a Type-C interface, a voltage regulator circuit, and a filter circuit; the voltage regulator circuit, the filter circuit, and the Type-C interface are electrically connected to the power input terminal of the DSP power control circuit 400.
[0078] In one possible implementation, the voltage regulator circuit includes a first Zener diode D4; the cathode of the first Zener diode D4 is electrically connected to the power input terminal of the filter circuit, the Type-C interface, and the DSP power control circuit 400; the anode of the first Zener diode D4 is grounded.
[0079] In one possible implementation, the filter circuit includes a third capacitor C3, a fourth capacitor C4, and a fifth capacitor C5; the first terminals of the third capacitor C3, the fourth capacitor C4, and the fifth capacitor C5 are electrically connected to the power input terminals of the voltage regulator circuit, the Type-C interface, and the DSP power control circuit 400; the second terminals of the third capacitor C3, the fourth capacitor C4, and the fifth capacitor C5 are grounded.
[0080] In one possible implementation, the DSP power control circuit 400 includes a power chip U1; the power chip U1 includes an enable level input pin EN; the enable level input pin EN is electrically connected to the collector of the second transistor Q2.
[0081] The low-cost timing detection circuit and DSP power supply circuit of this utility model, by setting a first switch detection circuit 200 and a second switch detection circuit 300, uses the first switch detection circuit 200 to output a high-level signal to the second switch detection circuit 300 after detecting that the voltage of the Type-C interface power circuit 100 drops to a specified threshold. After receiving the high-level signal, the second switch detection circuit 300 outputs a low-level signal to the DSP power chip U1 to shut down the DSP power. Thus, when the Type-C interface power circuit 100 suddenly loses power, the DSP power supply circuit can perform an effective shutdown operation, solving the problem that electronic products cannot perform normal shutdown operation when plugging and unplugging the Type-C power supply because the power-down timing does not meet the DSP specification requirements.
[0082] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A low-cost timing detection circuit, characterized in that it comprises: First switch detection circuit; Second switch detection circuit; The first switch detection circuit is electrically connected to both the Type-C interface power circuit and the second switch detection circuit. The output of the second switch detection circuit is electrically connected to the enable pin of the DSP power chip. The first switch detection circuit is used to output a high-level signal to the second switch detection circuit after detecting that the voltage of the Type-C interface power circuit has dropped to a specified threshold. After receiving the high-level signal, the second switch detection circuit outputs a low-level signal to the DSP power chip to turn off the DSP power supply.
2. The low-cost timing detection circuit according to claim 1, characterized in that, The first switch detection circuit includes: First transistor; Emitter circuit; Base circuit; The emitter circuit is electrically connected to the emitter of the first transistor; The base circuit is electrically connected to the base of the first transistor; The collector of the first transistor is electrically connected to the second switch detection circuit.
3. The low-cost timing detection circuit according to claim 2, characterized in that, The emitter circuit includes: A first diode, a first capacitor, a first resistor, and a second resistor; The anode of the first diode is electrically connected to the Type-C interface power circuit, the cathode of the first diode is electrically connected to the first terminal of the first capacitor, the first terminal of the first resistor and the first terminal of the second resistor, the second terminal of the first capacitor is grounded, the second terminal of the first resistor is electrically connected to the base of the first transistor, and the second terminal of the second resistor is electrically connected to the emitter of the first transistor.
4. The low-cost timing detection circuit according to claim 3, characterized in that, The base circuit includes: The second diode, the second capacitor, the third resistor, and the third diode; The anode of the second diode is electrically connected to the Type-C interface power circuit, the cathode of the second diode is electrically connected to the first terminal of the second capacitor and the first terminal of the third resistor, the second terminal of the second capacitor is grounded, and the second terminal of the third resistor is electrically connected to the anode of the third diode and the base of the first transistor. The cathode of the third diode is electrically connected to the Type-C interface power circuit.
5. The low-cost timing detection circuit according to claim 2, characterized in that, The second switch detection circuit includes: The fourth resistor and the second transistor; The first end of the fourth resistor is electrically connected to the collector of the first transistor, and the second end of the fourth resistor is electrically connected to the base of the second transistor. The emitter of the second transistor is grounded.
6. A DSP power supply circuit, comprising the low-cost timing detection circuit according to any one of claims 1-5, characterized in that, Also includes: Type-C interface power supply circuit; DSP power supply control circuit; The Type-C interface power circuit is electrically connected to the first switch detection circuit; The DSP power control circuit and the second switch detection circuit are used to switch the power supply on and off according to the level signal of the second switch detection circuit.
7. The DSP power supply circuit according to claim 6, characterized in that, The Type-C interface power supply circuit includes: Type-C interface; Voltage regulator circuit; Filtering circuit; The voltage regulator circuit, the filter circuit, and the Type-C interface are electrically connected to the power input terminal of the DSP power control circuit.
8. The DSP power supply circuit according to claim 7, characterized in that, The voltage regulator circuit includes: First Zener diode; The cathode of the first Zener diode is electrically connected to the power input terminal of the filter circuit, the Type-C interface, and the DSP power control circuit; The anode of the first Zener diode is grounded.
9. The DSP power supply circuit according to claim 7, characterized in that, The filtering circuit includes: Third capacitor, fourth capacitor, fifth capacitor; The first terminals of the third, fourth, and fifth capacitors are electrically connected to the power input terminals of the voltage regulator circuit, the Type-C interface, and the DSP power control circuit. The second terminals of the third, fourth, and fifth capacitors are grounded.
10. The DSP power supply circuit according to claim 7, characterized in that, The DSP power control circuit includes: Power chip; The power chip includes an enable level input pin; The enable level input pin is electrically connected to the collector of the second transistor.