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Coil driver ic with a circuit that floats the output terminal connected to the coil

A technology of coil drive and output terminal, applied in logic circuits, record carriers used in machines, electronic switches, etc.

Active Publication Date: 2018-11-20
ZINITIX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at this time, since there is a path through which current can flow between the internal circuit of the coil drive IC and the coil with the power cut off, an undesirable result may occur.

Method used

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  • Coil driver ic with a circuit that floats the output terminal connected to the coil
  • Coil driver ic with a circuit that floats the output terminal connected to the coil
  • Coil driver ic with a circuit that floats the output terminal connected to the coil

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Embodiment Construction

[0019] Embodiments of the present invention will be described below with reference to the drawings. However, the present invention is not limited to the examples described in this specification, and may be embodied in various other forms. The terms used in this specification are used to help the understanding of the embodiments, and are not intended to limit the scope of the present invention. In addition, the singular form used below also includes the plural form as long as the opposite meaning is not expressly expressed in the sentence.

[0020] figure 1 It is a diagram for explaining an example of the coil sharing circuit device 100 according to the related art.

[0021] Such as figure 1 As shown, the coil sharing circuit device 100 according to the prior art may include a first coil driver IC (Coil Driver IC) 110 , a second coil driver IC 120 , a coil 130 , and a load switch (Load Switch) 20 .

[0022] The first coil driving IC 110 and the second coil driving IC 120 ...

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PUM

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Abstract

A coil-driving IC having a first output terminal configured connected to a first terminal of a coil and a second output terminal configured connected to a second terminal of the coil is disclosed. The coil-driving IC comprises a first switch connected to the first output terminal; a second switch connected to the second output terminal; a current driving part comprising a first current terminal connected to the first output terminal via the first switch and a second current terminal connected to the second output terminal via the second switch; and a gate driving part controlling the first switch and the second switch so that, when the coil is driven by a current provided from the first current terminal or the second current terminal, the first switch and the second switch are in an ON state, otherwise, the first switch and the second switch are in an OFF state.

Description

technical field [0001] The present invention relates to a coil drive IC, and more particularly to a coil drive IC technology that converts the output terminal into a floating state so as to disconnect a coil connected in common to the output terminals of a plurality of coil drive ICs. Background technique [0002] Coils are used in devices that wirelessly transmit data and / or power, etc. Such a device may include a plurality of coils and a plurality of coil driver ICs connected to the respective coils in order to support various applications. However, by commonly connecting only one coil to the plurality of coil driver ICs, the plurality of coil driver ICs can time-divide the one coil and use it in common. [0003] For example, a first coil driver IC that functions as a MST (Magnetic Stripe Transmission) driver and a second coil driver IC that functions as a NFC (Near Field Communication) driver are connected to one coil, and the one coil can be time-divided and shared. us...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K7/08G06K19/06
CPCH03K17/687H03K19/0826
Inventor 林智洙楚大烈李真宇李龙熙
Owner ZINITIX