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USB6B2RL 查看數據表(PDF) - STMicroelectronics

零件编号
产品描述 (功能)
生产厂家
USB6B2RL
ST-Microelectronics
STMicroelectronics 
USB6B2RL Datasheet PDF : 9 Pages
1 2 3 4 5 6 7 8 9
USB6Bx
TECHNICAL INFORMATION
SURGE PROTECTION
The USB6Bx is particularly optimized to perform
surge protection based on the rail to rail topology.
The clamping voltage VCL can be estimated as follow:
VCL+ =Vcc + VF for positive surges
VCL - = - VF
for negative surges
with: VF = Vt + rd.Ip
(VF forward drop voltage) / (Vt forward drop
threshold voltage)
Note: the estimations do not take into account
phenomena due to parasitic inductances.
Fig. A1 :
ESD
SURGE
Lw
Lw di
Vf
dt
I/O
+Vcc
VI/O
Lw di
dt
Vcl+ =
Vcc+Vf+
Lw
di
dt
surge >0
Vcl- =
-Vf-
Lw
di
dt
surge <0
GND
Vcl+
Lw di
dt
POSITIVE
SURGE
Vcc+Vf
t
tr=1ns
tr=1ns
t
-Vf
-Lw di
dt
NEGATIVE
SURGE
Vcl-
2/9

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