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Passage tube control circuit, power management chip and power supply device

A control circuit and logic control circuit technology, applied in the power supply field, can solve the problems of low internal resistance, complex conduction control and high cost, and achieve the effect of flexible and convenient selection.

Active Publication Date: 2020-11-27
ZHUHAI ISMARTWARE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, PMOS tubes are generally not easy to achieve low internal resistance. Under the same internal resistance comparison, the cost of PMOS is higher than that of NMOS.
The conduction control of NMOS is relatively complicated, and the boost circuit needs to generate a voltage higher than the output power supply to drive the gate, and the boost circuit will introduce switching noise and EMI radiation and other interference, which are unacceptable to some circuit systems

Method used

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  • Passage tube control circuit, power management chip and power supply device
  • Passage tube control circuit, power management chip and power supply device
  • Passage tube control circuit, power management chip and power supply device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0047] see Figure 5 , in this embodiment, the power supply device includes a power management chip 1, a power supply circuit 2, a channel P1 and a power output terminal VBUS, and the power management chip 1 adopts the power management chip in the above embodiment. The access tube P1 is a PMOS tube, the control end of the access tube P1 is electrically connected to the multiplexing terminal GATE, the first end of the access tube P1 is electrically connected to the power supply circuit 2, and the second end of the access tube P1 is electrically connected to the power output terminal VBUS. The control end of the access pipe P1 is electrically connected to the power supply circuit 2 through the pull-up resistor R1.

[0048] When the power supply device of this embodiment is working, the type of the passage pipe P1 is detected by the MOS type detection circuit 20. When it is judged that the passage pipe P1 is a PMOS pipe, the logic control circuit 10 controls the PMOS drive circui...

no. 2 example

[0050] see Figure 6 , in this embodiment, the power supply device includes a power management chip 1, a power supply circuit 2, a channel N1 and a power output terminal VBUS, and the power management chip 1 adopts the power management chip in the above embodiment. The access tube N1 is an NMOS tube, the control end of the access tube N1 is electrically connected to the multiplexing terminal GATE, the first end of the access tube N1 is electrically connected to the power supply circuit 2, and the second end of the access tube N1 is electrically connected to the power output terminal VBUS.

[0051] When the power supply device of this embodiment is working, the type of the channel tube N1 is detected by the MOS type detection circuit 20. When it is judged that the channel tube N1 is an NMOS tube, the logic control circuit 10 controls the NMOS drive circuit 40 to enable, and the NMOS drive circuit 40 provides The control terminal of the passage tube N1 sends a control signal to ...

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PUM

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Abstract

The invention provides a Passage tube control circuit, a power supply management chip and a power supply device. The circuit comprises a multiplexing terminal, a logic control circuit, an MOS type detection circuit, a PMOS drive circuit and an NMOS drive circuit. The MOS type detection circuit is used for detecting the type of the access tube electrically connected with the multiplexing terminal and transmitting a detection signal to the logic control circuit. The PMOS driving circuit is used for sending a PMOS driving control signal to the multiplexing terminal. The NMOS driving circuit is used for sending an NMOS driving control signal to the multiplexing terminal. The logic control circuit is used for controlling the enabling of the PMOS driving circuit or the NMOS driving circuit according to the detection signal. The power supply management chip applies the access tube control circuit. The power supply device applies the power supply management chip. The access tube control circuit provided by the invention can be used for compatibly controlling the PMOS tube and the NMOS tube.

Description

technical field [0001] The present invention relates to the technical field of power supplies, in particular to a channel tube control circuit, a power management chip using the channel tube control circuit, and a power supply device using the power management chip. Background technique [0002] With the rapid popularization of a series of portable electronic products such as mobile phones, tablets, wireless earphones, smart watches and laptops, USB charging technology has also ushered in rapid development. [0003] The new USB Type-C interface has been widely used since its launch because it supports double-sided insertion, has a slimmer design, smaller size, and expandable functionality. The Type-C interface on the adapter side needs to use a channel tube to isolate the output. When the Type-C is not in the connected state, the access tube is turned off, so that the output of the Type-C is 0V; when the Type-C is in the connected state, the access tube is turned on, so tha...

Claims

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Application Information

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IPC IPC(8): H02M1/08
CPCH02M1/08
Inventor 梁源超张龙刘琼
Owner ZHUHAI ISMARTWARE TECH CO LTD