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US 11,770,120 B2Granted
Bootstrap circuit supporting fast charging and discharging and chip
OwnerZhifei Yang, Haijun Zhang +4inventors
InventorsZhifei Yang, Haijun Zhang, Liming Du, Jiantao Cheng, Hongjun Sun, Yongqing Qiao
Life of this patent
Estimating the term…
Abstract
A bootstrap circuit supporting fast charging and discharging and a chip. A voltage measurement module (12) and a switch module (11) are arranged, and the voltage measurement module (12) controls an operating state of the switch module (11); during charging, under a specific condition, the switch module (11) is enabled to be in an on state so as to achieve fast charging of a voltage output end; and during discharging, the purpose of fast discharging is achieved by means of a second field effect transistor (MP5) arranged in the bootstrap circuit.
Claims18
A bootstrap circuit supporting rapid charging and discharging, comprising:
- a first field-effect transistor, a second field-effect transistor, a capacitor, a switch module, a voltage detection module, and a voltage difference generation module, wherein
- a source of the first field-effect transistor is connected to a source of the second field-effect transistor through a first connection node, and the first connection node is connected to a voltage output terminal of the bootstrap circuit;
- a drain of the second field-effect transistor is connected to a first voltage input terminal of the bootstrap circuit, and a drain of the first field-effect transistor is connected to a second voltage input terminal of the bootstrap circuit;
- a gate of the first field-effect transistor is connected to a gate of the second field-effect transistor through a second connection node, the second connection node is connected to a first terminal of the voltage difference generation module, a second terminal of the voltage difference generation module is connected to the first voltage input terminal;
- one terminal of the capacitor is connected to the voltage output terminal, and the other terminal of the capacitor is connected to the first voltage input terminal;
- a first terminal of the switch module is connected to the second voltage input terminal, a second terminal of the switch module is connected to the voltage output terminal, and a third terminal of the switch module is connected to one terminal of the voltage detection module;
- the other terminal of the voltage detection module is connected to the second voltage input terminal, and is connected to a connection node of the gate of the first field-effect transistor and the voltage difference generation module;
- in a case of a voltage at the first voltage input terminal in a rising state, if the voltage detection module determines that a voltage difference between the second connection node and the second voltage input terminal satisfies a preset voltage value, the switch module is controlled to be in an on state, and the capacitor is charged by the second voltage input terminal through the switch module;
- and
- in a case of the voltage at the first voltage input terminal in a drop state, if a voltage at the second connection node is less than a voltage at the voltage output terminal, the second field-effect transistor is in an on state, and the capacitor is discharged through the second field-effect transistor.
7 more elements
A chip, comprising a bootstrap circuit, wherein the bootstrap circuit comprises:
- a first field-effect transistor, a second field-effect transistor, a capacitor, a switch module, a voltage detection module, and a voltage difference generation module, wherein
- a source of the first field-effect transistor is connected to a source of the second field-effect transistor through a first connection node, and the first connection node is connected to a voltage output terminal of the bootstrap circuit;
- a drain of the second field-effect transistor is connected to a first voltage input terminal of the bootstrap circuit, and a drain of the first field-effect transistor is connected to a second voltage input terminal of the bootstrap circuit;
- a gate of the first field-effect transistor is connected to a gate of the second field-effect transistor through a second connection node, the second connection node is connected to a first terminal of the voltage difference generation module, a second terminal of the voltage difference generation module is connected to the first voltage input terminal;
- one terminal of the capacitor is connected to the voltage output terminal, and the other terminal of the capacitor is connected to the first voltage input terminal;
- a first terminal of the switch module is connected to the second voltage input terminal, a second terminal of the switch module is connected to the voltage output terminal, and a third terminal of the switch module is connected to one terminal of the voltage detection module;
- the other terminal of the voltage detection module is connected to the second voltage input terminal, and is connected to a connection node of the gate of the first field-effect transistor and the voltage difference generation module;
- in a case of a voltage at the first voltage input terminal in a rising state, if the voltage detection module determines that a voltage difference between the second connection node and the second voltage input terminal satisfies a preset voltage value, the switch module is controlled to be in an on state, and the capacitor is charged by the second voltage input terminal through the switch module;
- and
- in a case of the voltage at the first voltage input terminal in a drop state, if a voltage at the second connection node is less than a voltage at the voltage output terminal, the second field-effect transistor is in an on state, and the capacitor is discharged through the second field-effect transistor.
7 more elements
Dependencies are inferred from the claim text.