Clamping characteristic

AN4022

4/15

DocID022589 Rev 2

The clamping characteristic of a bidirectional TVS is shown in Figure 4.

Figure 4. Typical clamping characteristic bidirectional device

Some TVS devices have a breakdown characteristic with a “snap-back” effect, allowing a

Figure 5. Typical clamping characteristic of a “snap-back” TVS

V

I

V

BR

1 mA

R

R

D

Breakdown area

V

BR

Breakdown area

1 mA

I

PP

V

CL

V

CL

I

PP

D

I

V

V

BR

1 mA

R

D

R

D

Breakdown area

Forward junction

area

I

PP

V

CL

I

PP

V

CL

Snap-back effect