
MAX4838A/MAX4840A/MAX4842A
Overvoltage-Protection Controllers with
Status
FLAG
8
_______________________________________________________________________________________
IEC 61000-4-2
Since January 1996, all equipment manufactured and/or
sold in the European community has been required to
meet the stringent IEC 61000-4-2 specification. The IEC
61000-4-2 standard covers ESD testing and perfor-
mance of finished equipment; it does not specifically
refer to integrated circuits. The MAX4838A/MAX4840A/
MAX4842A help users design equipment that meets
Level 3 of IEC 61000-4-2, without additional ESD-protec-
tion components.
The main difference between tests done using the
Human Body Model and IEC 61000-4-2 is higher peak
current in IEC 61000-4-2. Because series resistance is
lower in the IEC 61000-4-2 ESD test model (Figure 10),
the ESD-withstand voltage measured to this standard is
generally lower than that measured using the Human
Body Model. Figure 11 shows the current waveform for
the ±8kV IEC 61000-4-2 Level 4 ESD Contact
Discharge test. The Air-Gap test involves approaching
the device with a charger probe. The Contact
Discharge method connects the probe to the device
before the probe is energized.
CHARGE-CURRENT-
LIMIT RESISTOR
DISCHARGE
RESISTANCE
STORAGE
CAPACITOR
Cs
100pF
RC
1M
RD
1.5k
HIGH-
VOLTAGE
DC
SOURCE
DEVICE
UNDER
TEST
Figure 8. Human Body ESD Test Model
IP 100%
90%
36.8%
tRL
TIME
tDL
CURRENT WAVEFORM
PEAK-TO-PEAK RINGING
(NOT DRAWN TO SCALE)
Ir
10%
0
AMPERES
Figure 9. Human Body Model Current Waveform
PART
CONFIGURATION/
PACKAGE
VDS MAX (V)
RON AT 4.5V
(m
)
MANUFACTURER
Si5902DC
Dual/1206-8
30
143
Si1426DH
Single/SC70-6
30
115
Vishay Silconix
www.vishay.com
402-563-6866
FDC6305N
Dual/SSOT-6
20
80
FDC6561AN
Dual/ SSOT-6
30
145
FDG315N
Single/SC70-6
30
160
Fairchild Semiconductor
www.fairchildsemi.com
207-775-8100
Table 1. MOSFET Suggestions