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CN-116743133-B - Switch driving integrated circuit and switch driving setting method

CN116743133BCN 116743133 BCN116743133 BCN 116743133BCN-116743133-B

Abstract

The invention provides a switch driving integrated circuit and a switch driving setting method, which enable a first signal and a second signal at different moments so that under the effect of enabling different signals, a voltage control signal generation module or a current control signal generation module respectively generates different voltages or different currents, and a power tube driving current generation module can generate a pull-up driving current and a pull-down driving current of a power tube based on the different voltages or the different currents. The invention generates different voltages or different currents based on the external resistor network module, thus the adjustment of the pull-up driving current and the pull-down driving current of the power tube can be realized by adjusting the resistance value of the resistor of the external resistor network module, compared with the prior art, the invention can realize the adjustment of the power tube pull-up driving current through one pin, can also realize the adjustment of the power tube pull-down driving current, and can reduce the pin number.

Inventors

  • LIU GUOQIANG

Assignees

  • 杰华特微电子股份有限公司

Dates

Publication Date
20260512
Application Date
20230316

Claims (17)

  1. 1. A switch driving integrated circuit is characterized by comprising: The power tube is arranged inside the integrated circuit; The integrated circuit is connected with an external resistor network module arranged outside the integrated circuit through the pin PINK, and the other end of the external resistor network module is connected with low-potential ground; The control signal generation module is arranged inside the integrated circuit and is connected with the external resistor network module through the pin PINK; the power tube driving current generation module is arranged in the integrated circuit and connected with the output end of the control signal generation module, and the output end of the power tube driving current generation module is connected with the grid driving end of the power tube; The control signal generation module is a voltage control signal generation module, and comprises a first current source IK1, a second current source IK2, a first switch K1 and a second switch K2, wherein the first current source IK1 and the first switch K1 are connected between a power supply voltage VDD and a common node in series, the common node is connected with the pin PINK, the second current source IK2 and the second switch K2 are connected between the common node and low potential ground in series, or the second current source IK2 and the second switch K2 are connected between the power supply voltage VDD and the common node in series, when a first signal is valid, the voltage control signal generation module generates a first control voltage VK1, when a second signal is valid, the voltage control signal generation module generates a second control voltage VK2, and the first signal and the second signal are generated by an internal circuit of the integrated circuit.
  2. 2. The switch-driving integrated circuit of claim 1, wherein the first signal and the second signal are active at different times.
  3. 3. The switch-driving integrated circuit of claim 2, wherein the external resistor network module is composed of a resistor and a diode; The diode has a different conduction state when the first signal and the second signal are respectively active.
  4. 4. A switch-driving integrated circuit as claimed in claim 3, characterized in that: The power tube driving current generation module generates a pull-up driving current and a pull-down driving current of the power tube based on the first control voltage VK1 and the second control voltage VK 2.
  5. 5. The switch-driving integrated circuit of claim 1, wherein: When the first signal is active, the first switch K1 is closed, the first current source IK1 acts on the external resistor network module to generate the first control voltage VK1 at the common node; When the second signal is active, the second switch K2 is closed, and the second current source IK2 acts on the external resistor network module to generate the second control voltage VK2 at the common node.
  6. 6. The switch-driving integrated circuit of claim 5, wherein: A rectifying module is further arranged in the voltage control signal generating module and used for rectifying the first control voltage VK1 and the second control voltage VK 2; the rectification module rectifies the first control voltage VK1 to output a third voltage VK1'; the rectification module rectifies the second control voltage VK2 to output a fourth voltage VK2'.
  7. 7. The switch-drive integrated circuit of claim 6, wherein: The power tube driving current generating module comprises an A/D conversion module, M driving upper tubes, N driving lower tubes and an upper tube and lower tube grid driving signal generating module; the output end of the rectifying module is connected with the input end of the A/D conversion module; the output end of the A/D conversion module is connected with the input end of the upper tube/lower tube grid driving signal generation module; The output end of the upper tube/lower tube grid driving signal generating module is respectively connected with the grid driving end of the driving upper tube and the grid driving end of the driving lower tube; The M driving upper pipes are connected in parallel, the N driving lower pipes are connected in parallel, and the M driving upper pipes and the N driving lower pipes are connected in series at the grid driving end of the power pipe, wherein M and N are positive integers greater than 1.
  8. 8. The switch-drive integrated circuit of claim 7, wherein: The A/D conversion module converts the third voltage VK1' into a digital signal with a first bit number of A; The A/D conversion module converts the fourth voltage VK2' into a digital signal with the second bit number of B, wherein A and B are positive integers larger than 1.
  9. 9. The switch-driving integrated circuit of claim 5, wherein: The power tube driving current generating module comprises an A/D conversion module, M driving upper tubes, N driving lower tubes and an upper tube and lower tube grid driving signal generating module; the first control voltage VK1 and the second control voltage VK2 are connected with the input end of the A/D conversion module; the output end of the A/D conversion module is connected with the input end of the upper tube/lower tube grid driving signal generation module; The output end of the upper tube/lower tube grid driving signal generating module is respectively connected with the grid driving end of the driving upper tube and the grid driving end of the driving lower tube; The M driving upper pipes are connected in parallel, the N driving lower pipes are connected in parallel, and the M driving upper pipes and the N driving lower pipes are connected in series at the grid driving end of the power pipe, wherein M and N are positive integers greater than 1.
  10. 10. The switch-drive integrated circuit of claim 9, wherein: The A/D conversion module converts the first control voltage VK1 into a digital signal with a first bit number of A; the A/D conversion module converts the second control voltage VK2 into a digital signal with a second bit number of B, wherein A and B are positive integers greater than 1.
  11. 11. The switch-driving integrated circuit according to claim 8 or 10, characterized in that: dividing the M driving upper tubes into A groups, wherein the grid driving ends of the driving upper tubes in each group are connected together; dividing the N driving lower pipes into B groups, and connecting the grid driving ends of the driving lower pipes in each group; The upper tube grid driving signal generation module generates A grid driving signals based on the digital signal with the first bit number of A and the first signal respectively so as to drive grid driving ends of the A group driving upper tubes; the lower tube grid driving signal generation module generates B grid driving signals based on the digital signal with the second bit number of B and the second signal respectively so as to drive the grid driving ends of the B group driving lower tubes; Or alternatively Dividing the M driving upper tubes into B groups, wherein the grid driving ends of the driving upper tubes in each group are connected together; dividing the N driving lower pipes into A groups, and connecting the grid driving ends of the driving lower pipes in each group; the upper tube grid driving signal generation module generates B grid driving signals based on the digital signal with the second bit number of B and the second signal respectively so as to drive grid driving ends of the B group driving upper tubes; The lower tube grid driving signal generation module generates A grid driving signals based on the digital signal with the first bit number of A and the first signal respectively so as to drive the grid driving ends of the lower tubes driven by the A groups.
  12. 12. The switch-drive integrated circuit of claim 11, wherein: The A/D conversion modules are arranged in one or two.
  13. 13. The switch-driving integrated circuit according to any one of claims 7-10, 12, wherein: and after the integrated circuit is powered on, the first signal and the second signal are switch trigger signals generated inside the integrated circuit before the power tube grid driving end signal is generated.
  14. 14. The switch-drive integrated circuit of claim 6, wherein: the power tube driving current generation module comprises a voltage-current conversion module and a current mirror module; the output end of the rectifying module is connected with the input end of the voltage-current converting module, and the voltage-current converting module converts the third voltage VK1 'into the third current IC and converts the fourth voltage VK2' into the fourth current ID; the input end of the current mirror module is connected with the output end of the voltage-current conversion module, the output end of the current mirror module is connected with the grid electrode driving end of the power tube, The third current IC outputs the pull-up driving current of the power tube after passing through the current mirror module, and the fourth current ID outputs the pull-down driving current of the power tube after passing through the current mirror module; Or the third current IC outputs the pull-down driving current of the power tube after passing through the current mirror module, and the fourth current ID outputs the pull-up driving current of the power tube after passing through the current mirror module.
  15. 15. The switch-driving integrated circuit of claim 5, wherein: the power tube driving current generation module comprises a voltage-current conversion module and a current mirror module; The first control voltage VK1 or the second control voltage VK2 is connected to the input end of the voltage-current conversion module, and the voltage-current conversion module converts the first control voltage VK1 into a third current IC and converts the second control voltage VK2 into a fourth current ID; the input end of the current mirror module is connected with the output end of the voltage-current conversion module, the output end of the current mirror module is connected with the grid electrode driving end of the power tube, The third current IC outputs the pull-up driving current of the power tube after passing through the current mirror module, and the fourth current ID outputs the pull-down driving current of the power tube after passing through the current mirror module; Or the third current IC outputs the pull-down driving current of the power tube after passing through the current mirror module, and the fourth current ID outputs the pull-up driving current of the power tube after passing through the current mirror module.
  16. 16. The switch-driving integrated circuit according to any one of claims 14 to 15, wherein: The first signal and the second signal are respectively signals with the same or opposite electric potential with the driving end of the grid electrode of the power tube.
  17. 17. A switch driving setting method applied to the switch driving integrated circuit according to any one of claims 1 to 16, characterized in that: When the first signal is valid and the second signal is invalid, the voltage control signal generating module generates a first control voltage VK1, when the first signal is invalid and the second signal is valid, the voltage control signal generating module generates a second control voltage VK2, and the power tube driving current generating module generates a pull-up driving current and a pull-down driving current of the power tube based on the first control voltage VK1 and the second control voltage VK 2.

Description

Switch driving integrated circuit and switch driving setting method Technical Field The invention relates to the technical field of switch driving, in particular to a switch driving integrated circuit and a switch driving setting method. Background The power tube is widely applied to various electronic products, the power tube is driven by the driving circuit to be turned on or off, and corresponding signals are output by the on or off of the power tube so as to control the corresponding electronic products. Because parasitic capacitance exists in the power tube, the parasitic capacitance is generally charged or discharged by driving current in the process of switching on or off the power tube, so that the switching-on speed or switching-off speed of the power tube is determined by the magnitude of the driving current in the process of switching on or switching-off the power tube. As shown in fig. 1, M1 is a power tube, M2 and M3 are a driving pull-up tube and a driving pull-down tube, respectively, wherein M2 and M3 are integrated in a chip, M1 is disposed outside the chip, M2 and M3 are connected with a gate driving end of M1 through PIN1, and setting of driving current of M1 is achieved between PIN1 PIN and the gate driving end of M1 through resistors R11, R12 and D11. In fig. 1, M1 is disposed outside a chip IC, resulting in low integration level and more area required to be occupied, and on this basis, as shown in fig. 2, another power tube driving setting circuit in the prior art is provided, in which M1, M2 and M3 are integrated together in the chip IC, the chip IC is provided with PIN1 and PIN2, inside the chip IC, a common terminal of M2 and M3 is connected through PIN1 by means of wire bonding, PIN1 and PIN2 are connected through a network composed of resistors R11, R12 and D11, and a gate driving end of M1 is connected with PIN 2. Although M1, M2 and M3 can be integrated in one chip IC at the same time in the manner of fig. 2, the integration level is improved, but compared with the manner of fig. 1, it is necessary to draw out one PIN additionally, that is, the number of PINs is increased, in addition, since 2 long wires need to be tied inside the IC chip to be connected with PIN1 PIN and PIN2 PIN respectively, these two long wires will have an influence on the stability inside the chip IC. Accordingly, there is a need for an improvement over the deficiencies in the prior art to improve the performance of power tube drive circuits. Disclosure of Invention In order to solve the technical problems, the invention provides a switch driving integrated circuit and a switch driving setting method. According to a first aspect of the present invention, there is provided a switch driving integrated circuit comprising: The power tube is arranged inside the integrated circuit; The integrated circuit is connected with an external resistor network module arranged outside the integrated circuit through the pin PINK, and the other end of the external resistor network module is connected with low-potential ground; The control signal generation module is arranged inside the integrated circuit and is connected with the external resistor network module through the pin PINK; the power tube driving current generation module is arranged in the integrated circuit and connected with the output end of the control signal generation module, and the output end of the power tube driving current generation module is connected with the grid driving end of the power tube; The control signal generation module is controlled by a first signal and a second signal to obtain a first control signal and a second control signal, wherein the first signal and the second signal are generated by an internal circuit of the integrated circuit. Further, the first signal and the second signal are valid at different times. Further, the external resistor network module is composed of a resistor and a diode; The diode has a different conduction state when the first signal and the second signal are respectively active. Further, the control signal generating module is a voltage control signal generating module, When the first signal is valid, the voltage control signal generating module generates a first control voltage VK1, When the second signal is valid, the voltage control signal generating module generates a second control voltage VK2; The power tube driving current generation module generates a pull-up driving current and a pull-down driving current of the power tube based on the first control voltage VK1 and the second control voltage VK 2. Further, the control signal generating module is a current control signal generating module, When the first signal is valid, the current control signal generating module generates a first control current IA; When the second signal is valid, the current control signal generating module generates a second control current IB; the power tube driving current generation module generates a pull-up driving current