Trigger circuit for controlling peak performance of chip and board card
By designing a peak performance control trigger circuit for chips, using instrumentation amplifiers, reference voltage sources and comparators to compare the feedback voltage and reference voltage of the chip, it generates a trigger signal to quickly reduce the chip's operating frequency, solving the problem of slow response from traditional controllers. The problem of chip disability has achieved an effective peak current limiting function.
Patent Information
- Application Number
- CN202421371064.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-14
- Publication Date
- 2025-02-21
- Estimated Expiration
- 2034-06-14
AI Technical Summary
Traditional switching power supply controllers react too slowly when judging whether the chip's power supply line generates a large current, which may cause the chip's working voltage to drop too low, which in turn triggers overcurrent protection and disables the chip.
Design a trigger circuit for peak performance control of the chip, including an instrumentation amplifier, a reference voltage source and a comparator. This circuit generates a trigger signal to quickly reduce the chip's operating frequency by comparing the feedback voltage and the reference voltage of the chip.
It realizes rapid and precise reaction of changes in the chip feedback voltage, avoids disability caused by too low chip operating voltage drop, and effectively avoids overcurrent protection triggered by excessive current extraction and loading.
Smart Images
Figure CN222514724U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a chip control technology, in particular to a trigger circuit and a board card for controlling the peak performance of a chip. Background Art
[0002] When the chip generates a dynamic load of instantaneous high current, the chip's operating voltage will drop rapidly, and the switching power supply circuit will increase the opening time and frequency at the same time, so the power supply line will generate a large current. In this regard, the traditional approach is to use the switching power supply controller to determine whether the chip's power supply line generates a large current before sending a control signal to reduce the chip frequency to reduce the current draw. However, the traditional switching power supply controller takes too long to determine the current and reacts too slowly, which may cause the chip's operating voltage to drop too low and trigger the overcurrent protection, causing the chip to become disabled. Utility Model Content
[0003] The utility model is directed to a trigger circuit and a board card for controlling the peak performance of a chip, which can realize an automatic and good peak current limiting function of the chip.
[0004] According to an embodiment of the utility model, the trigger circuit for peak performance control of a chip of the utility model comprises an instrument amplifier, a reference voltage source and a comparator. The instrument amplifier receives a feedback voltage and a ground voltage of the chip, and outputs a voltage to be measured. The reference voltage source outputs a reference voltage. The comparator couples the instrument amplifier and the reference voltage source, and compares the voltage to be measured with the reference voltage to output a trigger signal to the chip.
[0005] In the trigger circuit according to the embodiment of the present invention, the output terminal of the instrumentation amplifier is coupled to the inverting input terminal of the comparator, and the output terminal of the reference voltage source is coupled to the non-inverting input terminal of the comparator.
[0006] In the trigger circuit according to the embodiment of the present invention, when the voltage to be measured is lower than the reference voltage, the comparator outputs a trigger signal with a high voltage level to the chip, so that the chip reduces the operating frequency according to the trigger signal.
[0007] In the trigger circuit according to the embodiment of the present invention, the non-inverting input terminal of the instrument amplifier receives the feedback voltage, and the inverting input terminal of the instrument amplifier receives the ground voltage.
[0008] In the trigger circuit according to the embodiment of the present utility model, the feedback voltage is provided by the C4 bump of the chip.
[0009] In the trigger circuit according to the embodiment of the present invention, the input end of the reference voltage source is coupled to the control module, and the control module outputs a setting signal to the reference voltage source. The reference voltage source generates a reference voltage according to the setting signal.
[0010] In the trigger circuit according to the embodiment of the present utility model, the control module is arranged in the chip.
[0011] In the trigger circuit according to the embodiment of the utility model, the chip is arranged on the substrate, and the substrate is arranged on the circuit board. The trigger circuit is arranged on the circuit board.
[0012] In the trigger circuit according to the embodiment of the utility model, the substrate and the comparator are arranged on the first surface of the circuit board, and the instrument amplifier and the reference voltage source are arranged on the second surface of the circuit board.
[0013] According to an embodiment of the utility model, the board of the utility model includes a substrate, a circuit board, a chip and a trigger circuit. The chip is arranged on the substrate, and the substrate is arranged on the circuit board. The trigger circuit of the utility model includes an instrument amplifier, a reference voltage source and a comparator. The instrument amplifier receives the feedback voltage and the ground voltage of the chip, and outputs a voltage to be measured. The reference voltage source outputs a reference voltage. The comparator couples the instrument amplifier and the reference voltage source, and compares the voltage to be measured and the reference voltage to output a trigger signal to the chip.
[0014] Based on the above, the trigger circuit and board for peak performance control of the chip of the utility model can generate a trigger signal according to the feedback voltage of the chip, so that when the feedback voltage of the chip is lower than the reference voltage, it can quickly react to output a trigger signal to the chip, so that the chip can quickly reduce the operating frequency.
[0015] In order to make the above features and advantages of the present invention more obvious and easy to understand, embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 is a schematic diagram of a trigger circuit of an embodiment of the utility model;
[0017] Figure 2 is a flow chart of a chip control method according to an embodiment of the present utility model;
[0018] Figure 3 is a schematic diagram of a trigger circuit of another embodiment of the utility model;
[0019] Figure 4 The diagram is a layout diagram of a trigger circuit and a chip on a board according to an embodiment of the utility model.
[0020] Description of Reference Numerals
[0021] 10: Chip;
[0022] 11: Control module;
[0023] 100: trigger circuit;
[0024] 110: Instrumentation amplifier;
[0025] 120: reference voltage source;
[0026] 130: Comparator;
[0027] 400: board;
[0028] 401: substrate;
[0029] 402: convex point;
[0030] 403: Circuit board;
[0031] 404: ball grid array;
[0032] 405: Printed circuit laminate routing;
[0033] 406: Feedback signal routing;
[0034] S11, S12, S21, S22: surface;
[0035] D1, D2, D3: direction;
[0036] Vb: feedback voltage;
[0037] Vf: reference voltage;
[0038] Vg: ground voltage;
[0039] Vt: voltage to be measured;
[0040] St: trigger signal;
[0041] Sc: set signal;
[0042] S210~S240: steps. DETAILED DESCRIPTION
[0043] Reference will now be made in detail to exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Whenever possible, the same reference numerals are used in the drawings and description to represent the same or similar parts.
[0044] Figure 1 Schematic diagram of a trigger circuit of an embodiment of the present invention. Figure 1, the trigger circuit 100 includes an instrumentation amplifier 110, a reference voltage source 120 and a comparator 130. The trigger circuit 100 is used for peak performance control of the chip 10. The instrumentation amplifier 110 and the reference voltage source 120 are coupled to the comparator 130. The comparator 130 is also coupled to the chip 10. In the present embodiment, the instrumentation amplifier 110 receives the feedback voltage Vb of the chip 10. The instrumentation amplifier 110 generates a voltage to be measured Vt according to the feedback voltage Vb and the ground voltage Vg, and outputs the voltage to be measured Vt to the comparator 130. The reference voltage source 120 outputs a reference voltage Vf to the comparator 130. In the present embodiment, the comparator 130 compares the voltage to be measured Vt and the reference voltage Vf to output a trigger signal St to the chip 10. In one embodiment, the ground voltage Vg can also be provided by the chip 10.
[0045] Figure 2 is a flow chart of a chip control method according to an embodiment of the present invention. Figure 1 as well as Figure 2 , the trigger circuit 100 and the chip 10 can perform the following steps S210 to S240. In step S210, the instrumentation amplifier 110 receives the feedback voltage Vb and the ground voltage Vg of the chip 10, and outputs the voltage to be measured Vt to the comparator 130. In step S220, the reference voltage source 120 outputs the reference voltage Vf to the comparator 130. In step S230, when the comparator 130 determines that the voltage to be measured Vt is lower than the reference voltage Vf, the comparator 130 outputs a trigger signal St with a high voltage level to the chip 10. In step S240, the chip 10 reduces the operating frequency according to the trigger signal St.
[0046] In this embodiment, the feedback voltage Vb may be the power supply voltage of the chip 10 or the operating voltage of the internal specific functional circuit. The instrumentation amplifier 110 may amplify the feedback voltage Vb or remove noise to generate the voltage to be measured Vt. In this embodiment, when the voltage to be measured Vt is lower than the reference voltage Vf, the comparator 130 may output a trigger signal St with a high voltage level to the chip 10, so that the chip 10 may reduce the operating frequency according to the trigger signal St. In other words, when the voltage level of the power supply voltage of the chip 10 or the operating voltage of the internal specific functional circuit drops to the threshold value, the trigger circuit 100 may output a trigger signal St to the chip 10, so that the chip 10 may reduce the operating frequency to reduce the current draw. Therefore, the trigger circuit 100 can realize the peak current limit (PCL) function.
[0047] However, in one embodiment, the reference voltage Vf can also be designed to determine that when the measured voltage Vt is higher than the reference voltage Vf, the comparator 130 can output a trigger signal St with a high voltage level to the chip 10, so that the chip 10 can increase the operating frequency or increase the current draw according to the trigger signal St. Therefore, the trigger circuit 100 can also realize the peak voltage limit (PVL) function.
[0048] Figure 3 Schematic diagram of a trigger circuit of another embodiment of the present invention. Figure 3 , Figure 1 The trigger circuit 100 may be implemented, for example, as Figure 3 , but the utility model is not limited to this. In the present embodiment, the trigger circuit 100 includes an instrument amplifier 110, a reference voltage source 120 and a comparator 130. The output end of the instrument amplifier 110 is coupled to the inverting input end of the comparator 130. The output end of the reference voltage source 120 is coupled to the non-inverting input end of the comparator 130. The output end of the comparator 130 is coupled to the chip 10. The non-inverting input end of the instrument amplifier 110 is coupled to the C4 bump of the chip 10 to receive the feedback voltage Vb. The feedback voltage Vb can be provided by the C4 bump of the chip 10. The inverting input end of the instrument amplifier 110 can also be coupled to the chip 10 to receive the ground voltage Vg fed back by the chip 10.
[0049] In the present embodiment, the input end of the reference voltage source 120 is coupled to the control module 11. The control module 11 is disposed in the chip 10, but the present invention is not limited thereto. In one embodiment, the control module 11 may also be an independent circuit and disposed outside the chip 10. In the present embodiment, the control module 11 may be an application specific integrated circuit (ASIC). The control module 11 may output a setting signal Sc to the reference voltage source 120 so that the reference voltage source 120 generates a reference voltage Vf according to the setting signal Sc. In other words, in different usage scenarios, the control module 11 may provide different setting signals Sc so that the trigger circuit 100 may also be applied to different functional circuits. In the present embodiment, the reference voltage Vf may be designed to be close to the minimum operating voltage of the transistor so that the frequency of the interrupt trigger is reduced, thereby effectively improving the circuit performance. In addition, the reference voltage source 120 may provide a reference voltage Vf with a higher accuracy (e.g., ±0.5%).
[0050] In this embodiment, when the chip 10 generates a dynamic load of an instantaneous large current, the operating voltage of the chip 10 may drop rapidly, so the feedback voltage Vb and the voltage to be measured Vt drop rapidly accordingly. In this regard, when the voltage to be measured Vt is lower than the reference voltage Vf, the comparator 130 will output a trigger signal St with a high voltage level to the chip 10. In this embodiment, the comparator 130 can achieve a response speed of nanoseconds (ns). The chip 10 can quickly reduce the operating frequency according to the trigger signal St to reduce the current draw, so that the operating voltage of the chip 10 can be effectively prevented from dropping too low to cause the chip 10 to become disabled, and the current draw of the chip 10 can be effectively prevented from being too large to trigger the overcurrent protection (OCP).
[0051] Figure 4 This is a schematic diagram of the layout of the trigger circuit and the chip on the board of an embodiment of the utility model. Figure 1 as well as Figure 4 , Figure 4 4 is a side view of the layout structure of an embodiment. In this embodiment, the board 400 includes a substrate 401, a circuit board 403, a chip 10 and a trigger circuit 100. The chip 10 is arranged on the substrate 401, and the substrate 401 is arranged on the circuit board 403. The trigger circuit 100 is arranged on the circuit board 403. Specifically, the chip 10 can be arranged on the first surface S11 of the substrate 401 through a plurality of bumps (C4 bumps) 402. The second surface S12 of the substrate 401 can be arranged on the first surface S21 of the circuit board 403 through a ball grid array (Ball Grid Array, BGA) 404. In this embodiment, the comparator 130 can be arranged on the first surface S21 of the circuit board 403. The instrument amplifier 110 and the reference voltage source 120 can be arranged on the second surface S22 of the circuit board 403. The first surface S11, S21 and the second surface S12, S22 are respectively parallel to the planes formed by extending along the direction D1 and the direction D2. Direction D1, direction D2, and direction D3 are perpendicular to each other. The first surfaces S11 and S21 may face direction D3, and the second surfaces S12 and S22 may face a direction opposite to direction D3. However, in another embodiment, the arrangement positions of the instrumentation amplifier 110, the reference voltage source 120, and the comparator 130 on the circuit board 403 are not limited to Figure 4As shown. The instrument amplifier 110, the reference voltage source 120, and the comparator 130 may be disposed on the same surface or different surfaces of the circuit board 403. For example, the instrument amplifier 110, the reference voltage source 120, and the comparator 130 may all be disposed on the first surface S21 or the second surface S22 of the circuit board 403. Alternatively, the instrument amplifier 110 and the comparator 130 may be disposed on the same surface. Alternatively, the reference voltage source 120 and the comparator 130 may be disposed on the same surface.
[0052] In the present embodiment, the circuit board 403 may be a printed circuit board (PCB). The comparator 130 may be electrically connected to the ball grid array 404 via a printed circuit laminate (PCL) trace 405. The comparator 130 may be electrically connected to the instrumentation amplifier 110 and the reference voltage source 120 via a through hole of the circuit board 403. The instrumentation amplifier 110 and the reference voltage source 120 may be electrically connected to the ball grid array 404 via a feedback signal trace 406 on the second surface S22 of the circuit board 403 and a through hole of the circuit board 403. The chip 10 may be electrically connected to the printed circuit laminate trace 405 and the feedback signal trace 406 via the bump 402, the through hole of the substrate 401 and the ball grid array 404. It should be noted that Figure 4 The schematic diagram is only used to represent the circuit configuration, and the specific wiring configuration and electrical connection method are not limited to Figure 4 shown.
[0053] In summary, the trigger circuit and board for peak performance control of the chip of the present invention can generate a trigger signal by comparing the feedback voltage of the chip and the high-precision reference voltage through a comparator, so it can quickly and accurately respond to the sudden increase of the feedback voltage and achieve a good peak current limiting function.
[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.
Claims
1. A trigger circuit for peak performance control of a chip, characterized in that: include: An instrumentation amplifier receives the feedback voltage and ground voltage of the chip and outputs the voltage to be measured; A reference voltage source outputs a reference voltage; as well as The comparator is coupled to the instrument amplifier and the reference voltage source, and compares the voltage to be measured with the reference voltage to output a trigger signal to the chip.
2. The trigger circuit according to claim 1, characterized in that: The output terminal of the instrumentation amplifier is coupled to the inverting input terminal of the comparator, and the output terminal of the reference voltage source is coupled to the non-inverting input terminal of the comparator.
3. The trigger circuit according to claim 2, characterized in that: When the voltage to be measured is lower than the reference voltage, the comparator outputs the trigger signal with a high voltage level to the chip, so that the chip reduces the operating frequency according to the trigger signal.
4. The trigger circuit according to claim 1, characterized in that: A non-inverting input terminal of the instrumentation amplifier receives the feedback voltage, and an inverting input terminal of the instrumentation amplifier receives the ground voltage.
5. The trigger circuit according to claim 1, characterized in that: The feedback voltage is provided by the C4 bump of the chip.
6. The trigger circuit according to claim 1, characterized in that: The input end of the reference voltage source is coupled to the control module, and the control module outputs a setting signal to the reference voltage source. The reference voltage source generates the reference voltage according to the setting signal.
7. The trigger circuit according to claim 6, characterized in that: The control module is arranged in the chip.
8. The trigger circuit according to claim 1, characterized in that: The chip is arranged on a substrate, and the substrate is arranged on a circuit board. The trigger circuit is arranged on the circuit board.
9. The trigger circuit according to claim 8, characterized in that: The substrate and the comparator are disposed on a first surface of the circuit board, and the instrument amplifier and the reference voltage source are disposed on a second surface of the circuit board.
10. A board, characterized in that: include: substrate; Circuit boards; A chip is arranged on the substrate, and the substrate is arranged on the circuit board; as well as A trigger circuit is arranged on the circuit board and comprises: An instrument amplifier receives a feedback voltage and a ground voltage of the chip and outputs a voltage to be measured; A reference voltage source outputting a reference voltage; and The comparator is coupled to the instrument amplifier and the reference voltage source, and compares the voltage to be measured with the reference voltage to output a trigger signal to the chip.