WO2007097300A1 - 電力供給制御装置 - Google Patents
電力供給制御装置 Download PDFInfo
- Publication number
- WO2007097300A1 WO2007097300A1 PCT/JP2007/053035 JP2007053035W WO2007097300A1 WO 2007097300 A1 WO2007097300 A1 WO 2007097300A1 JP 2007053035 W JP2007053035 W JP 2007053035W WO 2007097300 A1 WO2007097300 A1 WO 2007097300A1
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- WIPO (PCT)
- Prior art keywords
- charging
- circuit
- mosfet
- current
- power supply
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
- H03K17/082—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit
- H03K17/0822—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit in field-effect transistor switches
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/687—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors
Definitions
- the present invention relates to a power supply control device.
- a power supply control device is used as a so-called high-side driver that performs current control by inserting an n-channel MOSFET between a positive power source and a load.
- the gate voltage in order to sufficiently turn on the MOSFET (energization operation), the gate voltage must be equal to or higher than the power supply voltage (generally, about twice the power supply voltage). (Charge pump circuit) is required.
- the gate drive circuit applies an output voltage obtained by boosting the input voltage based on the power supply voltage to the gate to turn on the MOSFET.
- this type of power supply control device performs a forced cutoff operation on the MOSFET when the load current flowing through the MOSFET exceeds a predetermined threshold due to a load abnormality such as a short circuit at the load.
- Patent Document 1 Japanese Patent Laid-Open No. 2001-217696
- the present invention has been completed based on the above situation, and an object of the present invention is to provide power supply control capable of reducing power loss at the time of load abnormality while suppressing noise generation.
- the device is on offer.
- a power supply control device includes a MOSFET disposed between a power source and a load, a current detection element that outputs a current detection signal corresponding to a load current flowing in the MOSFET, and a current detection signal based on the current detection signal.
- An overcurrent protection circuit that causes the MOSFET to perform a forced cut-off operation when the load current flowing through the MOSFET exceeds the first threshold and a first current abnormality occurs, and the gate of the MOSFET based on an ON command signal of an external force
- a charging current is caused to flow to cause the MOSFET to be energized, a charging circuit whose charging speed can be changed, and a load current that flows to the MOSFET based on the current detection signal is the first threshold value.
- Control circuit that performs control , Characterized in that it comprises a.
- the load current is set to the second threshold value (the first threshold for causing the MOSFET to perform a forced cutoff operation) due to the occurrence of a load abnormality such as a short circuit in the load. It is controlled to change to high-speed charging when a value lower than the threshold value is exceeded. Therefore, when no load abnormality occurs and the load current is below the second threshold value, MOSFET performs a conduction operation at a relatively slow charge rate (the amount of charge charged to the gate per unit time). Noise generation can be suppressed.
- switching to high-speed charging when the second threshold is exceeded causes the load current to reach the first threshold at an early stage so that the MOSFET Forced shut-off operation can be executed quickly.
- FIG. 1 is a block diagram of an overall configuration of a power supply control device according to an aspect of the present invention.
- MOSFET 14 ⁇ • 'Power MOSFET
- Control logic control circuit, overcurrent protection circuit
- Rapid discharge FET discharge circuit, switch element for discharge
- Zener diode (charging voltage change circuit)
- Second threshold current for abnormality (second threshold)
- FIG. 1 is a block diagram of the overall configuration of the power supply control device 10 according to this embodiment.
- This power supply control device 10 is mounted on a vehicle (not shown), and power is supplied from the vehicle power source (hereinafter referred to as “power source 12”) to a load 11 such as a vehicle lamp, a cooling fan motor, or a defogger heater. Used to do control.
- load is a device to be controlled by the power supply control device 10 and does not include the electric wire 30 connected between the power supply control device 10 and the control target device.
- Circuit will be explained as meaning including load 11 and wire 30.
- the power supply control device 10 includes an n-channel power MOSFET 14 (an example of “MOSFET”) provided in a current path 13 from the power source 12 to the load 11! / . Then, the power supply control device 10 applies a control signal SI such as a constant voltage signal or a PWM (Pulse Width Modulation Pulse Width Modulation) control signal to the gate of the power MOSFET 14 so as to perform an on / off operation. The power supply to the load 11 connected to the output side is controlled.
- the power supply control device 10 is configured such that the input terminal P1 is connected to the external operation switch 15, and this It operates when operation switch 15 is turned on.
- the input terminal P1 is connected to the operation switch 15 through the resistor 15a, the connection point between the resistor 15a and the operation switch 15 is connected to the power supply 12 through the resistor 15b, and the input terminal P1 is operated.
- switch 15 When switch 15 is off, it is pulled up to the supply voltage Vcc!
- the power supply control device 10 includes the input terminal P 1, a power supply (Vcc) terminal P 2 and a tab terminal P 3 connected to the power supply 12, and a load connection terminal connected to the load 11. P4, an external terminal P5 connected to the ground (GND) via an external resistor 16 as an example of a current-voltage conversion circuit, a ground terminal P6 directly connected to the ground (GND), and a diagnostic output terminal P7
- the semiconductor device 17 semiconductor device
- a power MOSFET 14, a sense MOSFET 18 described below (an example of a “current detection element”), and a temperature sensor 19 (an example of a diode in this embodiment) as an example of a temperature detection element are formed as a power chip 20, It is configured by being assembled to the control chip 21 on which other circuits are mounted.
- the power chip 20 a plurality of MOSFETs whose drains are commonly connected to the tab terminal P3 are arranged, and most MOSFET group power sources are connected to the power FET input 51a and the load connection of the current mirror unit 51 described later.
- the power MOSFET 14 is configured by commonly connecting to the terminal P4, and the remaining MOSFET group configures the sense MOSFET 18 by commonly connecting the source to the sense FET input 51b of the current mirror unit 51. Note that the ratio of the number of MOSFET groups constituting the power MOSFET 14 to the number of MOSFETs constituting the sense MOSFET 18 is approximately the sense ratio.
- the control chip 21 mainly functions as an example of an input interface unit 22, an internal ground generation unit 23, a current detection unit 24, an overheat detection unit 25, a diagnostic output unit 26, an overcurrent protection circuit, and an overheat protection circuit.
- a control logic unit 27 and a gate drive unit 28 are mounted.
- the input interface unit 22 is connected to the input terminal P1 on the input side.
- the operation switch 15 is turned off! /
- the high-level control signal S1 is turned on and turned off! All Control signal S 1 is input, and this control signal S 1 is supplied to the internal ground generation unit 23 and the control logic unit 27.
- the power supply control device 10 receives a low level control signal S 1 in a normal state where both a current abnormality and a temperature abnormality have occurred.
- the MOSFET 14 is turned on to be energized
- the gate driver 28 turns off the power MOSFET 14 to be cut off when receiving the control signal S1 at a low level. Therefore, in this embodiment, the low-level control signal S 1 is an example of an “on command signal”, and the high-level control signal S 1 is an example of an “off command signal”.
- a diode 36 and a resistor 37 in which the force sword side is arranged on the high potential side, are connected in series between the power supply terminal P2 and the ground terminal P6. Is the internal ground GND1.
- the internal ground generation unit 23 as an example of the constant voltage power generation circuit is energized when receiving a low level control signal S1 (ON command signal) from the input interface unit 22, and is more than the power supply voltage Vcc. An internal ground GND2 that is lower than the specified voltage is generated. Then, a constant voltage obtained by subtracting the internal ground GND2 from the power supply voltage Vcc is supplied to the control logic unit 27, whereby the control logic unit 27 becomes operable.
- the current detection unit 24 includes a current mirror unit 51, a threshold voltage generation unit 52, and an overcurrent abnormality detection unit 53.
- FIG. 2 is an enlarged circuit diagram showing the current mirror unit 51, the threshold voltage generation unit 52, and the overcurrent abnormality detection unit 53, and other circuit configurations are partially omitted.
- the current mirror unit 51 includes a potential control circuit 54 for holding the output side potential (source potential) of the power MOSFET 14 and the sense MOSFET 18 at the same potential, and a pair of current mirror circuits 55 and 55. .
- the potential control circuit 54 includes an operational amplifier 56 and a FET 57 as a switch element.
- a power FET input 51a (a source of the power MOSFET 14)
- a sense FET input 51b (a source of the sense MOSFET 18) are connected to a pair of input terminals, respectively.
- the FET 57 is connected between the sense FET input 5 lb and the external terminal P5, and the output of the operational amplifier 56 is given to the control terminal.
- the power FET input 51 a is connected to the negative phase input of the operational amplifier 56
- the sense FET input 51 b is connected to the positive phase input of the operational amplifier 56.
- the differential output of the operational amplifier 56 is fed back to the positive phase input via the gate-drain of the FET 57.
- the sense current Is from the potential control circuit 54 flows to the external resistor 16 through the pair of current mirror circuits 55 and 55 and the external terminal P5, and the terminal voltage of the external terminal P5 according to the sense current Is Vo changes.
- the overcurrent abnormality detection unit 53 includes a plurality of (two in this embodiment) comparison circuits 58 and 59 (in this embodiment, a hysteresis comparator), and the terminal voltage Vo of the external terminal P5 is one input terminal of the comparison circuit 58. And to one input terminal of the comparison circuit 59.
- the comparison circuit 58 receives the first abnormality threshold voltage Voc from the threshold voltage generator 52 at the other input terminal, and when the terminal voltage Vo exceeds the first abnormality threshold voltage Voc, the low level is reached. Output the first abnormal current signal OC of the signal to the control logic unit 27.
- first abnormal threshold current ILoc the load current IL at the time of abnormal current flowing in the power MOSFET 14 is expressed as “first abnormal threshold current ILoc” (“first threshold”
- first threshold The current abnormality at this time is called “overcurrent” (an example of “first current abnormality”).
- the comparison circuit 59 has a second abnormality threshold voltage from the threshold voltage generator 52 at the other input terminal.
- the second abnormality current signal FC at the same level is output to the control logic unit 27.
- the load current IL at the time of abnormal current flowing through the power MOSFET 14 is expressed as “second abnormal threshold current ILfc” (“second threshold”
- second threshold The current abnormality at this time is called “fuse current” (an example of “second current abnormality”).
- the threshold voltage generator 52 includes a voltage dividing circuit that divides the reference voltage by a plurality of resistors, and the plurality of divided voltages generated by the voltage dividing circuit are used as the first abnormality threshold voltage Voc and the second abnormality voltage. Output as threshold voltage Vfc.
- the threshold voltage generation unit 52 includes a voltage dividing circuit 60 connected between the source of the power MOSFET 14 and the ground terminal P6.
- This voltage dividing circuit 60 is configured by connecting a plurality of resistors (in this embodiment, three resistors 60a to 60c) in series, and the divided voltage at the connection point A between the resistors 60a and 60b is the second abnormality.
- the threshold voltage Vfc is output, and the divided voltage at the connection point B between the resistors 60b and 60c is output as the first abnormality threshold voltage Voc.
- the voltage dividing circuit 60 is configured to divide the source voltage Vs of the power MOSFET 14, but may be configured to divide a predetermined voltage other than the source voltage.
- the abnormality threshold voltages Voc and Vfc can be set so as to increase or decrease in accordance with the increase or decrease of the source voltage Vs of the power MOSFET 14. Therefore, compared to a configuration in which a fixed level threshold value is set regardless of the change in the source voltage, for example, when the load 11 is short-circuited, the external resistor 16 is connected regardless of the power supply voltage Vcc.
- the terminal voltage Vo immediately reaches the abnormal threshold voltages Voc and Vfc, and each current abnormality can be detected quickly.
- FIG. 3 shows the smoke generation characteristics of an external circuit, for example, the electric wire 30 (for example, the wire covering material) that can be connected to the power supply control device 10 of this embodiment! It is a graph showing the relationship with time.
- the graph shows the smoke generation characteristics of the electric wire 30 connected to the power supply control device 10.
- the smoke generation characteristics differ depending on the external circuit (wiring members such as electric wires, loads) connected to the power supply control device 10, and the sense current Is level that outputs the abnormal signals FC and OC also differs accordingly. Coming force This adjustment can be easily performed by changing the resistance value of the external resistor 16 described above.
- ILmax is the rated current of load 11 (the device usage limit guaranteed at the time of design), and Io can flow in a thermal equilibrium state where the heat generation and heat dissipation in wire 30 are balanced. It is the limit current at equilibrium. When a current having a level higher than the equilibrium limit current Io is applied, the region becomes an excessive thermal resistance region, and the current level and the time until burning are in an inversely proportional relationship.
- the second abnormality threshold current ILfc is set to a value slightly higher than the rated current ILmax of the load 11. If the load current IL reaches this level, as described later, even if the power MOSFET 14 is not immediately shut off, it should be shut off when this fuse current state continues to some extent.
- the first abnormality threshold current ILoc is set to a value higher than the second abnormality threshold current ILfc.
- the overheat detection unit 25 receives a temperature signal S4 corresponding to the temperature of the power chip 20 from a temperature sensor 19 provided in the power chip 20.
- the overheat detection unit 25 detects a temperature abnormality when receiving a temperature signal S4 indicating an abnormal temperature exceeding a predetermined temperature threshold value, and provides the control logic unit 27 with a low level abnormal temperature signal OT.
- the diagnostic output unit 26 causes a current abnormality or a temperature abnormality as described later, and causes the power MOSFET 14 to perform first and second forced cutoff operations described later by the control logic unit 27.
- Control logic for high-level diagnostic signal Diag Upon receipt from the unit 27, the diagnostic output terminal P7 is pulled down to the low level and the diagnostic output is executed. As a result, it is possible to notify the outside that the power MOSFET 14 is in a forced cutoff state due to occurrence of a current abnormality or temperature abnormality, or execution of the fuse function.
- the control logic unit 27 includes the control signal S1 from the input interface unit 22, the first abnormal current signal OC and the second abnormal current signal FC from the current detection unit 24, and the abnormal temperature from the overheat detection unit 25.
- the control signal SI and the second abnormal current signal FC are supplied to the gate drive unit 28 as they are.
- the control logic unit 27 has received at least one of the first abnormal current signal OC having a low level of 24 current detection units and the abnormal temperature signal OT having a single level from the overheat detection unit 25. After the power MOSFET 14 is forcibly turned off for a predetermined reference cutoff time, the forced cutoff state is released.
- the forced cutoff means that the power MOSFET 14 is cut off even when the power supply control device 10 receives the low-level control signal S1 (ON command signal).
- the control logic unit 27 when the control logic unit 27 receives at least one of the low-level first abnormal current signal OC and the low-level abnormal temperature signal OT, the control logic unit 27 outputs a single-level output signal. Inhibit is given to the gate drive unit 28 to cause the power MOSFET 14 to execute the first forced cutoff operation. Then, after the predetermined reference cutoff time has elapsed, a high-level output signal Inhibit is given to the gate drive unit 28 to cancel the forced cutoff state of the power MOSFET 14. Therefore, the current detection unit 24 and the control logic unit 27 function as an example of the “overcurrent protection circuit” of the present invention.
- control logic unit 27 receives both the low-level second abnormal current signal FC from the current detection unit 24 and the abnormalities both when the first forced cutoff is performed.
- the time (hereinafter referred to as “fuse time”) is accumulated, and the low level output signal Inhibit is gated even when this accumulated time reaches a predetermined reference fuse time (> reference cutoff time).
- the power MOSFET 14 is forcibly cut off by giving to the drive unit 28. Less than The forced cutoff (operation) at this time is referred to as “second forced cutoff (operation)”.
- the second forced cutoff state is released on condition that, for example, a state in which a high-level control signal S1 (off command signal) is input to the input terminal P1 of the power supply control device 10 is continued for a predetermined time. It is like that.
- FIG. 4 is a schematic diagram showing the configuration of the gate drive unit 28.
- the gate drive unit 28 receives the control signal S1, the second abnormal current signal FC, and the output signal Inhibit from the control logic unit 27.
- the gate drive unit 28 includes a charge pump 90 (an example of the “first charging unit”) connected between the power supply terminal P2, the power MOSFET 14 and the gate of the sense MOSFET 18 (not shown in the figure), the power MOSFET 14 and the sense MOSFET.
- a normal discharge FET 91 an example of a “discharge switch element” connected between the gate and source of the MOSFET 18 is provided.
- the gate drive unit 28 includes an abnormal fast charging FET 92 (an example of a “charging switch element”) and a diode 93 (connected to the power terminal P2 and the gates of the power MOSFET 14 and the sense MOSFET 18).
- the gate drive unit 28 receives a low-level control signal S1 (ON command signal), so that the charge pump 90 A normal charge operation is performed in which a voltage boosted to a level higher than the power supply voltage Vcc is applied between each gate source of the power MOSFET 14 and the sense MOSFET 18 to turn on the power supply operation (solid line in Fig. 5A). (See graph).
- S1 ON command signal
- the boost operation of the charge pump 90 is turned off, and only the normal discharge FET 91 is turned on to turn on the power MOSFET 14 and the sense MOSFET 18 between each gate and source.
- the normal discharge operation is performed to discharge the electric charge and shut off (see the solid line graph in Fig. 5B).
- a low level control signal S1 When the ON command signal is received, initially, only the charge pump 90 is driven to start the energization operation of the power MOSFET 14 The load current IL exceeds the second abnormality threshold current ILfc, and the second abnormality occurs in the gate drive unit 28.
- the current signal FC is input, in addition to the charge pump 90, the FET92 for rapid charging in an abnormal state is also turned on to perform a quick charging operation that increases the boosting speed to the power supply voltage Vcc (one point in Fig. 5A). (See the dashed line graph).
- the gate drive unit 28 when the gate drive unit 28 receives the low-level control signal S1 (ON command signal) in the normal state, it drives only the charge pump 90 and causes the power MOSFET 14 to normally operate. Perform charging operation. Thereby, noise generation can be suppressed.
- a low-level control signal S1 ON command signal
- the load current IL exceeds the second abnormal threshold current ILfc, it is transferred to the charge pump 90 and the FET92 Also turn on to perform quick charging operation.
- the load current IL can reach the first abnormality threshold current ILoc early, and the first forced cutoff operation of the MOSFET can be executed quickly.
- the gate drive unit 28 when receiving a high level control signal S1 (off command signal) in a normal state, the gate drive unit 28 turns on only the normal discharge FET 91 to perform a normal discharge operation. As a result, noise generation can be suppressed.
- a high-level control signal S1 (OFF command signal) when received in an abnormal load condition, the abnormal discharge rapid discharge FET 94 is turned on together with the normal discharge FET 91 and suddenly turned on. Performs fast discharge operation. As a result, the power MOSFET 14 can be immediately shifted to the first and second forced cutoff states, and power loss can be reduced.
- the second discharge path is provided in parallel with the existing charge pump 90 and the abnormal-time quick charge FET 92 provided there is turned on and off, the charging speed is changed. Therefore, it can be configured relatively easily as compared with other configurations described later, and noise can be reduced.
- FIG. 6 shows another embodiment.
- the difference from the above embodiment shown in FIGS. 1 to 5 lies in the configuration of the charging circuit, and the other points are the same as the above embodiment shown in FIGS. Therefore, from Figure 1 to Figure
- FIG. 6 shows the configuration of the charging circuit of this embodiment.
- This charging circuit mainly includes a charge pump 100 and a clock generation circuit 101.
- the charge pump 100 includes three diodes 102 to 104 and a pair of boosting capacitors 105 and 106 connected in series between the power supply terminal P2 and the gate of the power MOSFET 14.
- Each boosting capacitor 105 has one end connected to a connection point between the diode 102 and the diode 103, and the other end connected to the clock generation circuit 101 via one buffer circuit (NAND circuit) 107.
- NAND circuit buffer circuit
- the boosting capacitor 106 has one end connected to a connection point between the diode 103 and the diode 104, and the other end connected to the clock generation circuit 101 via two buffer circuits (NAND circuits) 108 and 109.
- NAND circuits buffer circuits
- the clock generation circuit 101 includes two clock signals S5 and S6 having different frequencies.
- the clock signal S6 has a higher frequency than the clock signal S5), and includes a pair of output terminals 101a and 101b for outputting the clock signals S5 and S6, respectively.
- the output terminal 101a of the clock generation circuit 101 is connected to the inputs of the notch circuits 107 and 108, and the boosting operation, that is, the charging operation is executed at a speed corresponding to the frequency of the clock signal S5. Is done.
- the output terminal 101b of the clock generation circuit 101 is connected to the inputs of the buffer circuits 107 and 108, and the boosting operation, that is, the charging operation is executed at a high speed according to the frequency of the clock signal S6.
- the charging speed of the charging circuit can be changed with a relatively simple configuration in which the frequency of the clock signal supplied to the charge pump 100 is changed.
- FIG. 7 shows another embodiment. This embodiment is a configuration in which a clock signal of one frequency is supplied from the clock generation circuit 101 to the charge pump 100 with respect to the configuration of the above-described embodiment shown in FIG. It has become.
- each of the buffer circuits 107 and 109 has a configuration including a P-channel FET 110 and an n-channel FET 111 in which drains and gates are commonly connected to each other.
- the source of the p-channel FET 110 is connected to the power supply terminal P2 through the constant current circuit 112 and is connected to the power supply terminal P2 through the constant current circuit 113 and the switch element 114.
- the source of the n-channel FET 111 is connected to the ground terminal P6 through the constant current circuit 115 and is connected to the ground terminal P6 through the constant current circuit 116 and the switch element 117.
- the switch elements 114 and 117 are turned off, and the power MOS FET 14 is supplied to the gate of the power MOS FET 14 at a speed corresponding to the constant current amount from the constant current circuits 112 and 115. Charging operation is performed.
- the switch elements 114 and 117 are turned on, so that the constant current from the constant current circuits 113 and 116 can be charged and discharged to the boost capacitors 105 and 106 (buffer circuit).
- the amount of current flowing into the boosting capacitors 105 and 106 by 107 and 109 is increased, and accordingly, the high-speed charging operation is executed as the delay time in the buffer circuits 107 and 109 is shortened. Is done.
- FIG. 8 shows another embodiment.
- a clock signal having one frequency is supplied from the clock generation circuit 101 to the charge pump 100, and each of the boost capacitors 105 and 106 includes an abnormal boost capacitor 120, 121 and Si
- the elements 122 and 123 are connected in parallel.
- the switch elements 122 and 123 are turned off, and the gate of the power MOSFET 14 is charged at a speed corresponding to the capacity of the boosting capacitors 105 and 106.
- the action is executed.
- the switching elements 122 and 123 are turned on, so that the high-speed charging operation according to the combined capacity of the boosting capacitors 105 and 106 and the abnormal boosting capacitors 120 and 121 is performed. Is executed.
- FIG. 9 shows another embodiment.
- a clock signal of one frequency is supplied from the clock generation circuit 101 to the charge pump 100, and the configuration of the buffer circuits 107 and 109 is improved. Yes.
- a Zener diode 130 and a switch element 131 are connected in series between both sources of a p-channel FET 110 and an n-channel FET 111.
- the switch element 131 is turned on, whereby the charging voltage of the boosting capacitors 105 and 106 is suppressed to the Zener voltage of the Zener diode 130, and the power MOSFET 14 has a speed corresponding to this.
- the charging operation to the gate is executed.
- the switch element 131 is turned off, so that the boosting capacitors 105 and 106 can be charged to a charging voltage exceeding the Zener voltage. A speed charging operation is performed.
- the force described for the power supply control device 10 having an n-channel MOSFET as the MOSFET is not limited to this, and the present invention is also applicable to a configuration having a p-channel MOSFET. Can be applied.
- the circuit for discharging is arranged between the gate of the p-channel type MOSFET and the power supply 12, and the circuit for charging is arranged between the gate and the source.
- the clock generator circuit 101 outputs two clock signals S5 and S6 having different frequencies and selectively supplies them to the charge pump 100.
- the configuration may be such that one output terminal is connected to the charge pump 100 and the frequency of the clock signal output from this output terminal is changed by the clock generation circuit 101.
- a variable resistor is provided as a current changing circuit between the power supply terminal P2 and the source of the p-channel FET 110 and between the source of the n-channel FET 111 and the ground terminal P6. It may be configured to provide
- each boosting capacitor itself may be a variable capacitor, and the charging speed may be changed by changing the capacitance.
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Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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CN2007800062913A CN101390289B (zh) | 2006-02-22 | 2007-02-20 | 电力供应控制器 |
US12/223,652 US8054605B2 (en) | 2006-02-22 | 2007-02-20 | Power supply controller |
DE112007000411T DE112007000411B4 (de) | 2006-02-22 | 2007-02-20 | Energieversorgungssteuerung |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2006045701A JP4688693B2 (ja) | 2006-02-22 | 2006-02-22 | 電力供給制御装置 |
JP2006-045701 | 2006-02-22 |
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WO2007097300A1 true WO2007097300A1 (ja) | 2007-08-30 |
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PCT/JP2007/053035 WO2007097300A1 (ja) | 2006-02-22 | 2007-02-20 | 電力供給制御装置 |
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US (1) | US8054605B2 (ja) |
JP (1) | JP4688693B2 (ja) |
CN (1) | CN101390289B (ja) |
DE (1) | DE112007000411B4 (ja) |
WO (1) | WO2007097300A1 (ja) |
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JP2010172049A (ja) * | 2009-01-20 | 2010-08-05 | Autonetworks Technologies Ltd | 電線保護回路および電線の保護方法 |
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JP5341780B2 (ja) * | 2010-01-04 | 2013-11-13 | ルネサスエレクトロニクス株式会社 | 電力供給制御回路 |
JP5708034B2 (ja) * | 2011-02-28 | 2015-04-30 | 株式会社デンソー | 負荷駆動制御回路 |
EP2702664B1 (en) * | 2011-04-28 | 2018-01-17 | Zoll Circulation, Inc. | Battery management system with mosfet boost system |
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- 2007-02-20 WO PCT/JP2007/053035 patent/WO2007097300A1/ja active Application Filing
- 2007-02-20 US US12/223,652 patent/US8054605B2/en not_active Expired - Fee Related
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WO2014034237A1 (ja) * | 2012-08-31 | 2014-03-06 | 日立オートモティブシステムズ株式会社 | 電流検出回路及びそれを用いた電流制御装置 |
JP2014049975A (ja) * | 2012-08-31 | 2014-03-17 | Hitachi Automotive Systems Ltd | 電流検出回路及びそれを用いた電流制御装置 |
Also Published As
Publication number | Publication date |
---|---|
DE112007000411B4 (de) | 2011-11-24 |
JP4688693B2 (ja) | 2011-05-25 |
JP2007228180A (ja) | 2007-09-06 |
CN101390289B (zh) | 2012-05-09 |
US20090052096A1 (en) | 2009-02-26 |
DE112007000411T5 (de) | 2009-01-02 |
CN101390289A (zh) | 2009-03-18 |
US8054605B2 (en) | 2011-11-08 |
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