A device and method for improving output current sharing of hot-swappable chips
An output current, hot-swappable technology, applied in measurement devices, measurement flow/mass flow, data processing power supply, etc., can solve problems affecting system operation, uneven current, etc., to reduce conduction loss, output impedance uniformity, On-resistance reduction effect
Active Publication Date: 2022-07-12
SUZHOU METABRAIN INTELLIGENT TECH CO LTD
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- Application Information
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Problems solved by technology
See figure 1 As shown, a single hot-swap circuit supplies 3 load points, and hot-swap circuit 1 to hot-swap circuit 4 jointly supply 12 load points. When too many hot-swap chips are connected in parallel, it will cause uneven current flow and affect system operation.
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[0023] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the protection scope of the present invention can be more clearly defined.
[0024] see Figure 2 to Figure 5 , the embodiments of the present invention include:
[0025] A device for improving the output current sharing of hot-swap chips, comprising: a hot-swap circuit, a gate discharge control circuit and a current detection control circuit; the hot-swap circuits have multiple groups, and the multiple groups of hot-swap circuits are connected in parallel between the power supply terminal and the load terminal; each group of the hot-swap circuits includes a series-connected MOS transistor and a current detection resistor; the gate discharge control circuit includes a charge pump circuit and several parallel gate circuit...
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The invention discloses a device for improving the output current sharing of a hot-plug chip, comprising a hot-plug circuit, a gate discharge control circuit and a current detection control circuit; the hot-plug circuit includes a MOS tube and a current detection resistor; The discharge control circuit includes a charge pump circuit and a gate circuit, and the gate circuit is correspondingly connected to the MOS tube; the current detection control circuit detects the current flowing through the current detection resistors in each group of hot-swap circuits, and determines the heat with a smaller current. Plug-in circuit group; the current detection control circuit controls the conduction between the gate circuit and the charge pump circuit. After the conduction, the gate circuit biases the voltage of the charge pump circuit and transmits it to the MOS tube to reduce the hot-plug circuit. path impedance. Through the above method, the present invention can determine and connect the charge pump circuit to a group with a relatively small current, so as to achieve the effect of balancing the current, and at the same time, it can also reduce the conduction loss on the path.
Description
technical field [0001] The present invention relates to the technical field of hot-plugging, and in particular, to a device and method for improving the output current sharing of hot-plugging chips. Background technique [0002] Hot plugging refers to inserting or removing peripheral devices while the computer is running, without causing the host or peripheral devices to burn, and can detect and use new devices in real time. The hot-plug function is realized by a hot-plug chip. At present, the hot-plug technology is mainly applied to the card or the module. Connecting it to the system through the connector does not affect the working state of the system. [0003] Usually a hot-swap chip includes a drive MOS design and a current detection resistor. In addition to basic hot-swap, it also provides functions such as controlling the current rise rate, overcurrent protection, power management, and reporting the voltage and current status through the power management bus. The MOS ...
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IPC IPC(8): G06F1/26G06F13/40
CPCG06F1/266G06F13/4081Y02D10/00
Inventor 张修逢
Owner SUZHOU METABRAIN INTELLIGENT TECH CO LTD