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Electric apparatus with ESD protection effect

An electrostatic discharge protection, electronic device technology, applied in emergency protection circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, circuit devices, etc., can solve problems such as transistor burnout

Inactive Publication Date: 2013-01-30
RAYDIUM SEMICON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide an electronic device with electrostatic discharge protection effect to solve the technical problem of transistor burnout caused by high voltage in the human body discharge test of the electrostatic discharge protection circuit in the prior art

Method used

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  • Electric apparatus with ESD protection effect
  • Electric apparatus with ESD protection effect
  • Electric apparatus with ESD protection effect

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] image 3 A schematic structural diagram of an electronic device 30 with electrostatic discharge protection effect combined with an embodiment of the present invention is shown. Reference image 3 The electronic device 30 includes an upper unit 32, a level conversion circuit 34, and a lower unit 36. The level conversion circuit 34 is connected between the upper unit 32 and the lower unit 36.

[0029] Reference image 3 The upper unit 32 includes bonding pads 322 and 324, an ESD clamping circuit 326, and a buffer unit 328. The bonding pad 322 is connected to a first high voltage source (for example, 700V), and the bonding pad 324 is connected to a second high voltage source (for example, 680V). The ESD clamping circuit 326 is connected between the bonding pads 322 and 324. The buffer unit 328 is used to provide a corrected digital signal to the core circuit (not shown) of the upper unit 32.

[0030] The lower unit 36 ​​includes bonding pads 362 and 364, an ESD clamp circuit...

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PUM

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Abstract

An electric apparatus with ESD protection effect is provided. The electric apparatus comprises a high-side unit, a low-side unit, and a level shifter. The high-side unit comprises a first pad and a second pad. The low-side unit comprises a third pad and a fourth pad. The level shifter is connected between the first pad and the fourth pad. The level shifter comprises a first resistor, a clamp element, a second resistor, and an N-type transistor. The first resistor is connected between the first pad and a first node. The clamp element is connected between the first pad and a second node. The second resistor is connected between the first node and the second node. The N-type transistor has a source and a body connected to the fourth pad, a drain connected to the first node, and a gate connected to the low-side unit.

Description

Technical field [0001] The invention relates to an electronic device with electrostatic discharge protection effect. Background technique [0002] ESD protection is an important part of the design of various circuit modules. The electrostatic voltage in the environment may be as high as thousands of volts. If there is no special protection circuit, the extremely high static current generated by the high-voltage static electricity at the moment of discharge may flow into the internal circuit, causing component failure or damage. Therefore, in order to improve the reliability of electronic products, it is usually necessary to design an additional electrostatic discharge protection circuit in most precision electronic devices to properly eliminate possible static electricity to protect the circuits in the electronic device. [0003] figure 1 Shown is a schematic diagram of a typical ESD protection circuit used in lighting devices. The lighting device 10 includes a high side unit 12 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/04
CPCH02H9/046H02H9/04
Inventor 吴坤泰王建国
Owner RAYDIUM SEMICON