IC-MFL Datasheet, PDF (11/13 Pages) IC-Haus GmbH – 8-/12-FOLD FAIL-SAFE LOGIC N-FET DRIVER

iC-MFL / iC-MFLT
8-/12-FOLD FAIL-SAFE LOGIC N-FET DRIVER
OUTPUT VOLTAGE SURGE PROTECTION
Rev C1, Page 11/13
An internal protective circuitry allows for short overvolt-
age pulses of up to 18 V at the output stages. Puls
duration and duty cycle must be less than 100 ms and
2 % respectively for absolute maximum ratings.
I(OUTx)
[mA]
80
60
to ground via the output resistor which has a typical
value of 150 Ω.
I(OUTx)
[mA]
80
60
−150Ω
40
40
−150 Ω
20
3.6 mA
5
V(OUTx)
10
15
18
[V]
Figure 8: Surge output characteristic at OUTx
with Vin = low
The output characteristic in Figure 8 corresponds to
that of the lowside driver as shown in Figure 2 for an
output voltage V(OUTx) of up to VCC potential. At
higher output voltage, the excess current is diverted
20
5
−3 mA
V(OUTx)
10
15
18
[V]
Figure 9: Surge output characteristic at OUTx
with Vin = high
The output characteristic in Figure 9 corresponds to
that of the highside driver as shown in Figure 3 for
an output voltage V(OUTx) of up to VCC potential. At
higher output voltage, the excess current is diverted to
ground via the output resistor which has a typical value
of 150 Ω.
APPLICATION NOTES
Driving an N-channel MOSFET
One typical field of application for iC-MFL is in the op-
eration of 5 V logic level N-FETs with microprocessor
output signals of 1.8 to 5 V, as shown in Figure 10.
3.3 V
VCC
Micro-
controller
GND
3.3 V
0V
5V
IN1
IN2
IN3
IN4
IN5
IN6
IN7
IN8
EN
iC-MFL _{Supply- and}
VCC
Ground Monitor
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
OUT8
GNDR
GND
24V
CL
RL
T1
Figure 10: Driving an N-channel MOSFET