iC-GE100
PWM RELAY/SOLENOID DRIVER
nar y
limi
pre
Rev A1, Page 8/12
APPLICATIONS INFORMATION
Setting the coil current
The following equations can be given for the energise
and hold modes of the PWM control using Electrical
Characteristics Nos. 703 resp. 704:
RACT
=
K
1
I(SW
)
act
K
2
I(SW
)
hold
(3)
Example
For a relay with a starting current of 70 mA and 40 mA
hold current the following applies:
RACT
=
620ΩA
= 8.8
k
Ω
0.07
A
(5)
RHOLD
=
(4)
RHOLD
=
620ΩA
= 15.5
k
Ω
0.04
A
(6)
Application circuits
10..36V
LED
DIAG
SYNC
VB
10..36V
LED
DIAG
SYNC
VB
CVB
100nF
iC-GE
iC-GE100
SW
EN
CVB
100nF
iC-GE100
SW
EN
IACT
IHOLD
GND
IACT
IHOLD
GND
RACT
6.2k
GND
RHOLD
62k
GND
RACT
6.2k
RHOLD
62k
Figure 2: Activation by switching VB
10..36V
DIAG
DIAG
SYNC
VB
Figure 3: Activation by switching GND
CVB
100nF
iC-GE100
EN
SW
EN
IACT
IHOLD
GND
RACT
6.2k
GND
RHOLD
62k
Figure 4: Activation via EN
feedback from DIAG with 5 V logic levels
ICHAUS [ IC-HAUS GMBH ]
