USBDF02W5 STMicroelectronics, USBDF02W5 Datasheet - Page 5

• Manufacturer Part Number: USBDF02W5
• Description: IC EMI FILTER/LINE TERM SOT323-5
• Manufacturer: STMicroelectronics
• Series: USBDFxxW5r

Specifications of USBDF02W5

• Filter Type: Signal Line
• Mounting Type: Surface Mount
• Termination Style: Surface Mount (SMD,SMT)
• Mounting Style: SMD/SMT
• Package / Case: SOT-323-5
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Inductance: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-3742-2

USBDFxxW5
To have a good approximation of the remaining voltages at both V
the typical dynamical resistance value R
R
The results of the calculation done for V
V
This confirms the very low remaining voltage across the device to be protected. It is also
important to note that in this approximation the parasitic inductance effect was not taken into
account. This could be few tenths of volts during few ns at the V
is not present at the V
The measurements results shown below show very clearly
the ESD protection :
●
●
Figure 6.
BR
t
> R
V
= 7 V (typ.) and R
V
V
no influence of the parasitic inductances on Vout stage
output clamping voltage very close to V
V
output
d
output
input
input
, R
g
=
=
= 31.2 V
> R and R
= 7.95 V
Measurement board
R .V
R .V
g
t
BR
BR
R
+ R . V
R
+ R . V
out
load
d
g
t
Discharge
= 1
d
SURGE
d
side due the low current involved after the resistance R.
15 kV
> R
ESD
Air
input
g
d
(typ.) give:
, gives these formulas::
PP
d
. Taking into account the following hypothesis:
= 8 kV, R
Vin
BR
TEST BOARD
(positive strike) and -V
g
= 330 W (IEC61000-4-2 standard),
Vout
(Figure
in
in
side. This parasitic effect
Application information
and V
7.) the high efficiency of
F
(negative strike)
out
stages, we give
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