USBUF01W6 STMicroelectronics, USBUF01W6 Datasheet - Page 5

• Manufacturer Part Number: USBUF01W6
• Description: IC EMI FLTR/LINE TERM SOT323-6
• Manufacturer: STMicroelectronics
• Series: ASDr

Specifications of USBUF01W6

• Filter Type: Signal Line
• Mounting Type: Surface Mount
• Termination Style: Surface Mount (SMD,SMT)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Inductance: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-3087-2

USBUFxxW6
Figure 6.
Figure 7.
To have a good approximation of the remaining voltages at both Vin and Vout stages, we
give the typical dynamical resistance value Rd. By taking into account these following
hypothesis: 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
effect is not present at the V
The measurements done hereafter show very clearly (figure 8) the high efficiency of the
ESD protection:
●
●
BR
Discharge
= 7 V (typ.) and R
Vinput = 31.2 V
Voutput = 7.95 V
no influence of the parasitic inductances on Voutput stage
Voutput clamping voltage very close to V
and - V
SURGE
16kV
ESD
Air
ESD Surge
F
USBUFxxW6 ESD clamping behavior
Measurement board
t
(forward voltage) in the negative way
V
> R
PP
d
, R
Vin
TEST BOARD
g
d
> R
= 1
Rg
d
output
and R
V
(typ.) give:
ouput
Vout
V
Vinput
side due the low current involved after the resistance R
Rd
BR
S1
load
=
> R
g
R
------------------------------------------------------ -
=
Vinput
= 8 kV, R
USBUF01W6
t
d
R
---------------------------------------------- -
, it gives these formulas:
V
g
BR
BR
Rt
Voutput
V
+
BR
(breakdown voltage) in the positive way
R
R
R
t
g
d
+
g
= 330
R
Vinput
d
V
S2
Rd
V
g
BR
(IEC 61000-4-2 standard),
input
Technical information
side. This parasitic
protected
Device
to be
Rload
5/11
t
.