CN210608652U - Low step voltage quick charger circuit - Google Patents
Low step voltage quick charger circuit Download PDFInfo
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- CN210608652U CN210608652U CN201921280824.3U CN201921280824U CN210608652U CN 210608652 U CN210608652 U CN 210608652U CN 201921280824 U CN201921280824 U CN 201921280824U CN 210608652 U CN210608652 U CN 210608652U
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Abstract
The utility model relates to a low step voltage quick charger circuit, which comprises a basic circuit and a low step voltage control circuit; the low step voltage control circuit comprises a control chip U3 and a peripheral circuit, the utility model discloses an adopt above-mentioned circuit design, on the basic circuit, increase the low step voltage control circuit, through utilizing the control chip U3 wherein to be connected and cooperate with the peripheral circuit, reach the purpose that reduces the voltage ripple, realizes that low step voltage charges to avoid stronger voltage ripple to cause bad influences such as reduction battery capacity to the battery in the charging process; furthermore, the utility model discloses control scheme's cost is lower, can reduce customer's purchasing cost.
Description
The technical field is as follows:
the utility model belongs to the charger circuit field refers in particular to a low step voltage quick charger circuit.
Background art:
the charger is a device which can charge the battery with energy by charging the current to the rechargeable battery, and is a device which converts alternating current into low-voltage direct current; the dc voltage should be a fixed value, but many times it is obtained by rectifying and filtering the ac voltage, and because the filtering is not clean, there is a residual ac component, and even if the battery is used for supplying power, the fluctuation of the load will be caused, and these periodic and random ac signals are called ripples. However, in the using process, the strong ripple waves can cause the generation of surge voltage or current, which leads to the burning of electric equipment, increases the loss of the battery and reduces the capacity of the battery.
The utility model has the following contents:
the utility model aims at overcoming the weak point that the above-mentioned stronger voltage ripple of prior art produced harmful effects to the battery promptly, provide a low-voltage ripple, low step voltage quick charger circuit.
The utility model adopts the technical proposal that: a low step voltage fast charger circuit, the low step voltage fast charger circuit comprising a base circuit; the charger circuit comprises a basic circuit, a charger circuit and a control circuit, wherein the basic circuit comprises an AC input end, an EMI rectifying filter circuit, a power conversion circuit, a PWM control circuit, a synchronous rectifying filter circuit, a feedback voltage stabilizing circuit, a PDTYPEC output end, and the charger circuit also comprises a low step voltage control circuit which comprises a control chip U3 and peripheral circuits;
the specific model of the control chip U3 is RT7202KD, the control chip U3 includes sixteen pins, the peripheral circuit includes resistors R26, R27, R28, R29, R30, R31, R32, R33, R34, R35, R36, R37, R38, R39, R40, capacitors C13, C14, C15, C16, C17, C18, C19, C20, C21, stabilizing diodes ZD1, ZD2, 3, ZD4, and further includes MOS transistor Q4, diode D4, VBUS terminal, OPTO terminal, D + terminal, D-terminal, CC1 terminal, CC2 terminal, ZD terminal, and second terminal;
the drain of a MOS tube Q4 is connected with the basic circuit, the source of a MOS tube Q4 is connected with the VBUS end, one end of a resistor R35 is connected with the basic circuit, the other end of a resistor R35 is connected with a first GND end, one end of a resistor R28 is connected with a connecting line of the MOS tube Q4 and the basic circuit in parallel, the other end of a resistor R28 is connected with a capacitor C13, the other end of a capacitor C13 is connected with a second GND end, one end of a resistor R27 is connected with a connecting line of the MOS tube Q4 and the VBUS end in parallel, the other end of a resistor R27 is connected with a second pin of a control chip U3, the gate of a MOS tube Q4 is connected with a connecting line of a resistor R27 and the control chip U3 in,
the cathode of the diode D4 is connected in parallel with a connecting line between the MOS tube Q4 and the VBUS end, the anode of the diode D4 is connected with the resistor R26, the other end of the resistor R26 is connected with the sixteenth pin of the control chip U3, one end of the capacitor C21 is connected in parallel with a connecting line between the MOS tube Q4 and the VBUS end, the other end of the capacitor C21 is connected in parallel with a connecting line between the resistor R35 and the first GND end, one end of the resistor R40 is connected in parallel with a connecting line between the MOS tube Q4 and the resistor R28, the other end of the resistor R40 is connected in parallel with a connecting line between the resistor R26 and the control chip U3, one end of the capacitor C19 is connected with the eleventh pin of the control chip U3, the other end of the capacitor C19 is connected with the resistor R5, the other end of the resistor R32 is,
one end of a capacitor C18 is connected to the twelfth pin of the control chip U3, the other end of the capacitor C18 is connected to the resistor R31, the other end of the resistor R31 is connected in parallel to the connection line between the resistor R32 and the control chip U3, one end of a resistor R25 is connected in parallel to the connection line between the resistor R32 and the control chip U3, the other end of a resistor R25 is connected to the other end of the resistor R31, the other end of the resistor R25 is connected to the OPTO terminal, one end of a resistor R33 is connected to the tenth pin of the control chip U3, the other end of a resistor R33 is connected in parallel to the connection line between the resistor R35 and the basic circuit, one end of a resistor R34 is connected to the ninth pin of the control chip U3, the other end of a resistor R34 is connected in parallel to the connection line,
two ends of a capacitor C17 are respectively connected in parallel between a connecting line of a resistor R33 and a control chip U3 and a connecting line of a resistor R34 and a control chip U3, a first pin of the control chip U3 is connected in parallel with a connecting line of a capacitor C13 and a second GND end, one end of a resistor R30 is connected in parallel with a connecting line of a control chip U3 and the second GND end, the other end of a resistor R30 is connected in parallel with a connecting line of a capacitor C19 and a control chip U3, one end of a resistor R29 is connected in parallel with a connecting line of a resistor R30 and a capacitor C19, the other end of a resistor R29 is connected with a fifteenth pin of the control chip U3, one end of a capacitor C14 is connected with a fourth pin of the control chip U3, the other end of a capacitor C14 is connected in parallel with a connecting line of a,
the cathode of a zener diode ZD4 is connected with a resistor R37, the other end of the resistor R37 is connected with the fifth pin of the control chip U3, the anode of the zener diode ZD4 is connected in parallel with the connection line between the capacitor C13 and the second GND terminal, one end of a capacitor C20 is connected in parallel with the connection line between the resistor R37 and the zener diode ZD4, the other end of a capacitor C20 is connected in parallel with the connection line between the capacitor C13 and the second GND terminal, the D-terminal is connected in parallel with the connection line between the zener diode ZD4 and the resistor R37 and is connected with the capacitor C20, the cathode of the zener diode ZD1 is connected with a resistor R39, the other end of a resistor R39 is connected with the sixth pin of the control chip U3, the anode of the zener diode ZD1 is connected in parallel with the connection line between the capacitor C36,
one end of a capacitor C16 is connected in parallel with a connecting line of a zener diode ZD1 and a resistor R39, the other end of the capacitor C16 is connected in parallel with a connecting line of a capacitor C13 and a second GND end, a CC1 end is connected in parallel with a connecting line of a zener diode ZD1 and a resistor R39 and is connected with the capacitor C16, one end of a resistor R38 is connected with a seventh pin of a control chip U3, the other end of a resistor R38 is connected with the CC2 end, a cathode of the zener diode ZD2 is connected in parallel with a connecting line of the resistor R38 and the CC2 end, an anode of the zener diode ZD2 is connected in parallel with a connecting line of the capacitor C13 and the second GND,
one end of a capacitor C15 is connected in parallel with a connecting line between the ends of the resistor R38 and the resistor CC2, the other end of the capacitor C15 is connected in parallel with a connecting line between the end of the capacitor C13 and the second GND end, one end of a resistor R36 is connected to the eighth pin of the control chip U3, the other end of the resistor R36 is connected with the end D +, the cathode of a zener diode ZD3 is connected in parallel with a connecting line between the end of the resistor R36 and the end D +, and the anode of the zener diode ZD3 is connected in parallel with a connecting line between the end of the capacitor C13 and the second GN.
By adopting the circuit design, the utility model adds the low step voltage control circuit on the basic circuit, and achieves the purposes of reducing the voltage ripple and realizing the low step voltage charging by utilizing the connection and the matching of the control chip U3 and the peripheral circuit, thereby avoiding the adverse effects of reducing the battery capacity and the like on the battery caused by the stronger voltage ripple in the charging process; furthermore, the utility model discloses control scheme's cost is lower, can reduce customer's purchasing cost.
Description of the drawings:
fig. 1 is a circuit structure diagram of the charger circuit of the present invention;
fig. 2 is a circuit structure diagram of the low step voltage control circuit of the present invention;
fig. 3 is a schematic block diagram of the low step voltage control circuit of the present invention.
The specific implementation mode is as follows:
the present invention will be further described with reference to the following specific embodiments and accompanying drawings.
As shown in fig. 1 to fig. 3, the present invention is: a low step voltage fast charger circuit, the low step voltage fast charger circuit comprising a base circuit; the charger circuit comprises a basic circuit, a charger circuit and a control circuit, wherein the basic circuit comprises an AC input end, an EMI rectifying filter circuit, a power conversion circuit, a PWM control circuit, a synchronous rectifying filter circuit, a feedback voltage stabilizing circuit, a PDTYPEC output end, and the charger circuit also comprises a low step voltage control circuit which comprises a control chip U3 and peripheral circuits;
the specific model of the control chip U is RT7202KD, the RT7202 contains MCU, programmable switching power supply (PPS) can be realized, in addition, voltage feedback VFB and current feedback IFB are provided, namely, output voltage can be accurately controlled, so that the function of stepping with the voltage of 20mv can be realized, the stepping and increasing gradually can be realized, after the output voltage is detected by an integrated digital control IC, the internal MCU calls a drinking program to control the output voltage, the control chip U totally comprises sixteen pins, and the peripheral circuit comprises resistors R, capacitors C, C and stabilizing diodes, ZD, and further comprises an MOS tube Q, a diode D, VBUS end, an OPTO end, a D + end, a D-GND end, a CC end, a first end and a second GND end;
the drain of a MOS tube Q4 is connected with the basic circuit, the source of a MOS tube Q4 is connected with the VBUS end, one end of a resistor R35 is connected with the basic circuit, the other end of a resistor R35 is connected with a first GND end, one end of a resistor R28 is connected with a connecting line of the MOS tube Q4 and the basic circuit in parallel, the other end of a resistor R28 is connected with a capacitor C13, the other end of a capacitor C13 is connected with a second GND end, one end of a resistor R27 is connected with a connecting line of the MOS tube Q4 and the VBUS end in parallel, the other end of a resistor R27 is connected with a second pin of a control chip U3, the gate of a MOS tube Q4 is connected with a connecting line of a resistor R27 and the control chip U3 in,
the cathode of the diode D4 is connected in parallel to a connection line between the MOS transistor Q4 and the VBUS terminal, the anode of the diode D4 is connected to the resistor R26, the other end of the resistor R26 is connected to a sixteenth pin of the control chip U3, one end of the capacitor C21 is connected in parallel to a connection line between the MOS transistor Q4 and the VBUS terminal, the other end of the capacitor C21 is connected in parallel to a connection line between the resistor R35 and the first GND terminal, one end of the resistor R40 is connected in parallel to a connection line between the MOS transistor Q4 and the resistor R28, the other end of the resistor R28 is connected in parallel to a connection line between the resistor R28 and the control chip U28, one end of the capacitor C28 is connected to the eleventh pin of the control chip U28, the other end of the capacitor C28 is connected to the resistor R28, the other end of the resistor R28 is connected to the fourteenth pin of the control chip U28, one end of the capacitor C28 is connected to the twelfth pin of the control chip U28, the other end of the resistor R28 is connected in parallel to the connection line of, one end of a resistor R25 is connected in parallel with a connection line between the resistor R32 and the control chip U3, the other end of the resistor R25 is connected with the other end of the resistor R31, the other end of the resistor R25 is connected with the OPTO end, one end of a resistor R33 is connected with the tenth pin of the control chip U3, the other end of the resistor R33 is connected in parallel with a connection line between the resistor R35 and a basic circuit, one end of the resistor R34 is connected with the ninth pin of the control chip U3, the other end of the resistor R34 is connected in parallel with a connection line between the resistor R35 and the first GND end,
two ends of a capacitor C17 are respectively connected in parallel between a connecting line of a resistor R33 and a control chip U3 and a connecting line of a resistor R34 and a control chip U3, a first pin of the control chip U3 is connected in parallel with a connecting line of a capacitor C13 and a second GND end, one end of a resistor R30 is connected in parallel with a connecting line of a control chip U3 and the second GND end, the other end of a resistor R30 is connected in parallel with a connecting line of a capacitor C19 and a control chip U3, one end of a resistor R29 is connected in parallel with a connecting line of a resistor R30 and a capacitor C19, the other end of a resistor R29 is connected with a fifteenth pin of the control chip U3, one end of a capacitor C14 is connected with a fourth pin of the control chip U3, the other end of a capacitor C14 is connected in parallel with a connecting line of a,
the cathode of a zener diode ZD4 is connected with a resistor R37, the other end of the resistor R37 is connected with the fifth pin of the control chip U3, the anode of the zener diode ZD4 is connected in parallel with the connection line between the capacitor C13 and the second GND terminal, one end of a capacitor C20 is connected in parallel with the connection line between the resistor R37 and the zener diode ZD4, the other end of a capacitor C20 is connected in parallel with the connection line between the capacitor C13 and the second GND terminal, the D-terminal is connected in parallel with the connection line between the zener diode ZD4 and the resistor R37 and is connected with the capacitor C20, the cathode of the zener diode ZD1 is connected with a resistor R39, the other end of a resistor R39 is connected with the sixth pin of the control chip U3, the anode of the zener diode ZD1 is connected in parallel with the connection line between the capacitor C36,
one end of a capacitor C16 is connected in parallel with a connecting line of a zener diode ZD1 and a resistor R39, the other end of the capacitor C16 is connected in parallel with a connecting line of a capacitor C13 and a second GND end, a CC1 end is connected in parallel with a connecting line of a zener diode ZD1 and a resistor R39 and is connected with the capacitor C16, one end of a resistor R38 is connected with a seventh pin of a control chip U3, the other end of a resistor R38 is connected with the CC2 end, a cathode of the zener diode ZD2 is connected in parallel with a connecting line of the resistor R38 and the CC2 end, an anode of the zener diode ZD2 is connected in parallel with a connecting line of the capacitor C13 and the second GND,
one end of a capacitor C15 is connected in parallel with a connecting line between the ends of the resistor R38 and the resistor CC2, the other end of the capacitor C15 is connected in parallel with a connecting line between the end of the capacitor C13 and the second GND end, one end of a resistor R36 is connected to the eighth pin of the control chip U3, the other end of the resistor R36 is connected with the end D +, the cathode of a zener diode ZD3 is connected in parallel with a connecting line between the end of the resistor R36 and the end D +, and the anode of the zener diode ZD3 is connected in parallel with a connecting line between the end of the capacitor C13 and the second GN.
By adopting the circuit design, the utility model adds the low step voltage control circuit on the basic circuit, and achieves the purposes of reducing the voltage ripple and realizing the low step voltage charging by utilizing the connection and the matching of the control chip U3 and the peripheral circuit, thereby avoiding the adverse effects of reducing the battery capacity and the like on the battery caused by the stronger voltage ripple in the charging process; furthermore, the utility model discloses control scheme's cost is lower, can reduce customer's purchasing cost.
Claims (1)
1. A low step voltage fast charger circuit, the low step voltage fast charger circuit comprising a base circuit; the charger circuit is characterized by also comprising a low stepping voltage control circuit, wherein the low stepping voltage control circuit comprises a control chip U3 and a peripheral circuit;
the specific model of the control chip U3 is RT7202KD, the control chip U3 includes sixteen pins, the peripheral circuit includes resistors R26, R27, R28, R29, R30, R31, R32, R33, R34, R35, R36, R37, R38, R39, R40, capacitors C13, C14, C15, C16, C17, C18, C19, C20, C21, stabilizing diodes ZD1, ZD2, 3, ZD4, and further includes MOS transistor Q4, diode D4, VBUS terminal, OPTO terminal, D + terminal, D-terminal, CC1 terminal, CC2 terminal, ZD terminal, and second terminal;
the drain of a MOS tube Q4 is connected with the basic circuit, the source of a MOS tube Q4 is connected with the VBUS end, one end of a resistor R35 is connected with the basic circuit, the other end of a resistor R35 is connected with a first GND end, one end of a resistor R28 is connected with a connecting line of the MOS tube Q4 and the basic circuit in parallel, the other end of the resistor R28 is connected with a capacitor C13, the other end of the capacitor C13 is connected with a second GND end, one end of a resistor R27 is connected with a connecting line of the MOS tube Q4 and the VBUS end in parallel, the other end of a resistor R27 is connected with a second pin of a control chip U3, and the gate of the MOS tube Q4 is connected with a connecting line of a resistor R27 and the control chip U3;
the negative electrode of a diode D4 is connected in parallel to a connecting line between the MOS tube Q4 and the VBUS end, the positive electrode of the diode D4 is connected with a resistor R26, the other end of the resistor R26 is connected to a sixteenth pin of a control chip U3, one end of a capacitor C21 is connected in parallel to a connecting line between the MOS tube Q4 and the VBUS end, the other end of a capacitor C21 is connected in parallel to a connecting line between a resistor R35 and a first GND end, one end of a resistor R40 is connected in parallel to a connecting line between the MOS tube Q4 and a resistor R28, the other end of the resistor R40 is connected in parallel to a connecting line between a resistor R26 and the control chip U3, one end of a capacitor C19 is connected to an eleventh pin of the control chip U3, the other end of the capacitor C19 is connected to a resistor R5, and the other end of the resistor R; one end of a capacitor C18 is connected to the twelfth pin of the control chip U3, the other end of the capacitor C18 is connected to the resistor R31, the other end of the resistor R31 is connected in parallel to the connection line between the resistor R32 and the control chip U3, one end of the resistor R25 is connected in parallel to the connection line between the resistor R32 and the control chip U3, the resistor R25 is connected to the other end of the resistor R31, the other end of the resistor R25 is connected to the OPTO terminal, one end of the resistor R33 is connected to the tenth pin of the control chip U3, the other end of the resistor R33 is connected in parallel to the connection line between the resistor R35 and the basic circuit, one end of the resistor R34 is connected to the ninth pin of the control chip U3, and the other end of the resistor R34 is connected in parallel to the connection line between the resistor R;
two ends of a capacitor C17 are respectively connected in parallel between a connection line of a resistor R33 and a control chip U3 and a connection line of a resistor R34 and a control chip U3, a first pin of the control chip U3 is connected in parallel with a connection line of a capacitor C13 and a second GND end, one end of a resistor R30 is connected in parallel with a connection line of a control chip U3 and the second GND end, the other end of a resistor R30 is connected in parallel with a connection line of a capacitor C19 and a control chip U3, one end of a resistor R29 is connected in parallel with a connection line of a resistor R30 and a capacitor C19, the other end of the resistor R29 is connected with a fifteenth pin of the control chip U3, one end of a capacitor C14 is connected with a fourth pin of the control chip U3, and the other end of a capacitor C14 is connected in parallel with a connection line of;
the cathode of a zener diode ZD4 is connected with a resistor R37, the other end of the resistor R37 is connected with the fifth pin of the control chip U3, the anode of the zener diode ZD4 is connected in parallel with the connecting line of a capacitor C13 and the second GND end, one end of a capacitor C20 is connected in parallel with the connecting line of a resistor R37 and a zener diode ZD4, the other end of a capacitor C20 is connected in parallel with the connecting line of a capacitor C13 and the second GND end, the D-end is connected in parallel with the connecting line of the zener diode ZD4 and the resistor R37 and is connected with a capacitor C20, the cathode of the zener diode ZD1 is connected with a resistor R39, the other end of a resistor R39 is connected with the sixth pin of the control chip U3, and the anode of the zener diode ZD1 is connected in parallel with the connecting line of the capacitor C;
one end of a capacitor C16 is connected in parallel with a connecting line of a zener diode ZD1 and a resistor R39, the other end of the capacitor C16 is connected in parallel with a connecting line of a capacitor C13 and a second GND end, a CC1 end is connected in parallel with a connecting line of a zener diode ZD1 and a resistor R39 and is connected with a capacitor C16, one end of a resistor R38 is connected with a seventh pin of a control chip U3, the other end of a resistor R38 is connected with a CC2 end, the cathode of a zener diode ZD2 is connected in parallel with a connecting line of a resistor R38 and a CC2 end, and the anode of the zener diode ZD2 is connected in parallel with a connecting line of a capacitor C13 and a second GN;
one end of a capacitor C15 is connected in parallel with a connecting line between the ends of the resistor R38 and the resistor CC2, the other end of the capacitor C15 is connected in parallel with a connecting line between the end of the capacitor C13 and the second GND end, one end of a resistor R36 is connected to the eighth pin of the control chip U3, the other end of the resistor R36 is connected with the end D +, the cathode of a zener diode ZD3 is connected in parallel with a connecting line between the end of the resistor R36 and the end D +, and the anode of the zener diode ZD3 is connected in parallel with a connecting line between the end of the capacitor C13 and the second GN.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921280824.3U CN210608652U (en) | 2019-08-08 | 2019-08-08 | Low step voltage quick charger circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921280824.3U CN210608652U (en) | 2019-08-08 | 2019-08-08 | Low step voltage quick charger circuit |
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| Publication Number | Publication Date |
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| CN210608652U true CN210608652U (en) | 2020-05-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201921280824.3U Active CN210608652U (en) | 2019-08-08 | 2019-08-08 | Low step voltage quick charger circuit |
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| CN (1) | CN210608652U (en) |
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- 2019-08-08 CN CN201921280824.3U patent/CN210608652U/en active Active
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