IC-GE100_15 Datasheet, PDF (8/12 Pages) IC-Haus GmbH – PWM RELAY/SOLENOID DRIVER

iC-GE100
PWM RELAY/SOLENOID DRIVER
APPLICATIONS INFORMATION
preliminary
Rev B1, Page 8/12
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:
K1
RACT =
(3)
I(SW )_act
Example
For a relay with a starting current of 70 mA and 40 mA
hold current the following applies:
620Ω A
RACT = _{0.07 A} = 8.8 kΩ
(5)
K2
RHOLD =
(4)
I(SW )_hold
RHOLD
=
620Ω A
0.04 A
= 15.5 kΩ
(6)
Application circuits
10..36V
LED
CVB
100nF
SYNC
DIAG
iC-GE100
EN
VB
SW
GND
IACT
IHOLD
RACT RHOLD
6.2k
62k
GND
Figure 2: Activation by switching VB
10..36V
DIAG
DIAG
VB
SYNC
CVB
100nF
iC-GE100
SW
EN
EN
GND
IACT
IHOLD
RACT RHOLD
6.2k
62k
GND
Figure 4: Activation via EN
feedback from DIAG with 5 V logic levels
10..36V
CVB
100nF
SYNC
LED
DIAG
iC-GE100
EN
VB
SW
GND
IACT
IHOLD
RACT RHOLD
6.2k
62k
GND
Figure 3: Activation by switching GND