Datasheet
Table Of Contents
- Figure 1. ESDAxxSC5 functional diagram
- Figure 2. ESDAxxSC6 functional diagram
- 1 Characteristics
- Table 1. Absolute ratings (Tamb = 25 C)
- Table 2. Electrical characteristics - definitions (Tamb = 25 C)
- Table 3. Electrical characteristics - values (Tamb = 25 C)
- Figure 3. Peak power dissipation versus initial junction temperature
- Figure 4. Peak pulse power versus exponential pulse duration (Tj initial = 25 C)
- Figure 5. Clamping voltage versus peak pulse current (Tj initial = 25 ˚C). Rectangular waveform tp = 2.5 µs
- Figure 6. Capacitance versus reverse applied voltage (typical values)
- Figure 7. Relative variation of leakage current versus junction temperature (typical values)
- Figure 8. Peak forward voltage drop versus peak forward current (typical values)
- 2 Application information
- 3 Technical information
- 4 Ordering information
- 5 Package information
- 6 Ordering information
- 7 Revision history
Application information ESDAxxSCx
4/11
2 Application information
2.1 Calculation of the clamping voltage use of the dynamic
resistance
The ESDA family has been designed to clamp fast spikes like ESD. Generally the PCB
designers need to calculate easily the clamping voltage V
CL
. This is why we give the
dynamic resistance in addition to the classical parameters. The voltage across the
protection cell can be calculated with the following formula:
V
CL
= V
BR
+ R
d
I
PP
Where I
PP
is the peak current through the ESDA cell.
As the value of the dynamic resistance remains stable for a surge duration lower than 20 µs,
the 2.5 µs rectangular surge is well adapted. In addition both rise and fall times are
optimized to avoid any parasitic phenomenon during the measurement of R
d
.
2.2 Dynamic resistance measurement
The short duration of the ESD has led us to prefer a more adapted test wave, as below
defined, to the classical 8/20µs and 10/1000 µs surges.
Figure 9. 2.5 µs duration measurement wave
Figure 7. Relative variation of leakage
current versus junction
temperature (typical values)
Figure 8. Peak forward voltage drop versus
peak forward current
(typical values)
25 50 75 100 125
1
10
100
500
ESDA14V2SC5/SC6
&
ESDA6V1SC5/SC6
ESDA5V3SC5/SC6
ESDA25SC6
ESDA17SC6
&
ESDA19SC6
T (°C)
j
I [T ] / I [T =25°C]
Rj Rj
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
0.01
0.10
1.00
5.00
ESDA25SC6
ESDA17SC6
ESDA5V3SC5/SC6
ESDA14V2SC5/SC6
&
ESDA6V1SC5/SC6
ESDA19SC6
I (A)
FM
V (V)
FM
T = 25°C
j
2µs
tp = 2.5µs
t
I
Ipp