IC-GE100 Datasheet, PDF (9/11 Pages) IC-Haus GmbH – PWM RELAY/SOLENOID DRIVER

iC-GE100
PWM RELAY/SOLENOID DRIVER
preliminary
Rev A0.3, Page 9/11
CVB
100nF
GND
SYNC
LED
DIAG
iC-GE100
EN
IACT
IHOLD
RACT RHOLD
6.2k
62k
VB
SW
GND
10..36V
CVB
100nF
GND
SYNC
LED
DIAG
iC-GE100
EN
IACT
IHOLD
RACT RHOLD
6.2k
62k
VB
SW
GND
10..36V
Figure 5: High-side driver for
wheeling diode
10..36V
CVB
100nF
CSG
1nF
RS
100K
RSG
2MEG
SYNC
EN
EN
LED
DIAG
iC-GE100
relays with free-
CSP
10P
CSN
10P
ACN
VB
50Hz
RL
SW
ACP
GND
IACT
IHOLD
RACT RHOLD
6.2k
62k
GND
Figure 6: Low-side driver for relays with free-wheeling
diode
Figure 7: Utilising the SYNC input
V(AC)
Time
V(EN)
Time
V(SYNC)
I(SW )
Time
IACT
IHOLD
Time
I(RL)
Time
TRelon
Figure 8: Utilising the SYNC input
By means of resistors RS* and capacitors CS* a phase
shifted signal at SYNC is derived from the 50 Hz load
supply.
Thus the relay is activated resp. deactivated with zero
crossing of the load supply after working EN.
The phase shift is used to compensate the switching
delay of the relay so that the load can be switched at
zero current.
The benefit from synchronous switching may be
utilised, if the switching times are short and repro-
ducible.