Fast charging circuit for adult toys and adult toy
A fast charging circuit for adult toys includes a charging control unit, where the charging control unit is configured to perform charging control of a rechargeable battery with a charging rate of not less than 1 C, and the charging control unit employs a battery fast-charging management chip. A constant current parameter setting loop is disposed at a current control terminal of the battery fast-charging management chip and configured to switch and/or set current parameters for a constant current charging process. An enable control loop is disposed at an enable terminal of the battery fast-charging management chip. In this way, the present disclosure achieves precise control of charging current, and greatly shortens the charging duration, such that the user does not need to wait for completion of an entire charging process or a long charging duration, but may charge the adult toy in fragmented time.
1 . A fast charging circuit for adult toys, comprising a charging control unit, wherein the charging control unit is configured to perform charging control of a rechargeable battery with a charging rate of not less than 1 C;
the charging control unit employs a battery fast-charging management chip;
a constant current parameter setting loop is disposed at a current control terminal of the battery fast-charging management chip and configured to switch and/or set current parameters for a constant current charging process; wherein the constant current parameter setting loop includes a variable resistor and a multi-level comparator detection module including a first comparison input terminal, a second comparison input terminal, and a first control strategy, wherein
the first comparison input terminal is provided with a first comparator that compares an input voltage of a VCC terminal of the battery fast-charging management chip with a voltage reference threshold V 3 ;
the second comparison input terminal is provided with a second comparator that compares the input voltage of the VCC terminal of the battery fast-charging management chip with a voltage reference threshold V 4 , wherein V 3 is greater than V 4 ;
the first control strategy is that:
when VCC is greater than V 3 and VCC is greater than V 4 , a comparison output causes the variable resistor to switch to a first resistance value,
when VCC is less than V 3 and VCC is greater than V 4 , the comparison output causes the variable resistor to switch to a second resistance value, and
when VCC is less than V 3 and VCC is less than V 4 , the comparison output causes the variable resistor to switch to a third resistance value, wherein the first resistance value is less than the second resistance value, and the second resistance value is less than the third resistance value; and
an enable control loop is disposed at an enable terminal of the battery fast-charging management chip.
2 . The fast charging circuit for adult toys according to claim 1 , wherein the constant current parameter setting loop comprises at least two sets of switchable preset parameters.
3 . The fast charging circuit for adult toys according to claim 1 , wherein the constant current parameter setting loop is further provided with an electronic switch circuit; and
the electronic switch circuit is configured to switch a resistance value of the variable resistor.
4 . The fast charging circuit for adult toys according to claim 1 , wherein the constant current parameter setting loop comprises a resistor Rs; and
the current parameters for the constant current charging process are set by setting different resistance values of the resistor Rs.
5 . The fast charging circuit for adult toys according to claim 4 , wherein the resistance value of the resistor Rs is any one of 0.5Ω, 0.1Ω, 0.05Ω, 0.033Ω, 0.025Ω, and 0.02Ω.
6 . The fast charging circuit for adult toys according to claim 4 , wherein an inductor L 1 is disposed at the current control terminal of the battery fast-charging management chip, and the inductor L 1 is further connected to the resistor Rs.
7 . The fast charging circuit for adult toys according to claim 6 , wherein a capacitor C 1 is disposed at a current detection terminal of the battery fast-charging management chip;
the capacitor C 1 is connected between the current detection terminal of the battery fast-charging management chip and a first node; and
the first node is located between the inductor L 1 and the resistor Rs.
8 . The fast charging circuit for adult toys according to claim 6 , wherein a capacitor C 2 is disposed at a voltage detection terminal of the battery fast-charging management chip;
the capacitor C 2 is connected between the voltage detection terminal of the battery fast-charging management chip and a second node; and
the second node is located between the resistor Rs and a positive electrode of the rechargeable battery.
9 . The fast charging circuit for adult toys according to claim 1 , wherein a protection resistor and a filter capacitor are further disposed at the VCC terminal of the battery fast-charging management chip.
10 . An adult toy, comprising the fast charging circuit for adult toys according to claim 1 .
11 . The adult toy according to claim 10 , wherein the adult toy further comprises at least one charging cable for fast charging.
12 . The fast charging circuit for adult toys according to claim 1 , wherein the enable control loop comprises a third comparison input terminal and a second control strategy, wherein
the third comparison input terminal is provided with a third comparator that compares the input voltage of the VCC terminal of the battery fast-charging management chip with a voltage reference threshold V 1 ; and
the second control strategy is that when VCC is greater than V 1 , an output of the third comparator causes the enable terminal to trigger activation of the battery fast-charging management chip.
13 . The fast charging circuit for adult toys according to claim 12 , wherein the voltage reference threshold V 1 ranges from 4.2 V to 4.5 V.
14 . The fast charging circuit for adult toys according to claim 12 , wherein the third comparator is a hysteresis comparator;
the voltage reference threshold V 1 comprises a first voltage reference threshold V 11 and a second voltage reference threshold V 12 ; and the first voltage reference threshold V 11 is greater than the second voltage reference threshold V 12 ; and
the second control strategy is that when VCC is greater than V 11 , the output of the third comparator causes the enable terminal to trigger activation of the battery fast-charging management chip.
15 . The fast charging circuit for adult toys according to claim 14 , wherein a difference between the first voltage reference threshold V 11 and the second voltage reference threshold V 12 is a hysteresis voltage; and
a value of the hysteresis voltage is greater than or equal to 0.1 V.