Datasheet
preliminary preliminary
iC-GE100
PWM RELAY/SOLENOID DRIVER
Rev B1, Page 9/12
GNDIACT IHOLD
SW
iC-GE100
SYNC
EN
DIAG VB
6.2k
RACT RHOLD
62k
GND
10..36V
LED
100nF
CVBCVB
100nF
62k
RHOLDRACT
6.2k
Figure 5:
High-side driver for relays with free-wheeling
diode
RHOLD
GNDIACT IHOLD
SW
iC-GE100
SYNC
EN
DIAG VB
RACT
6.2k 62k
10..36V
LED
GND
100nF
CVBCVB
100nF
6.2k
RACT RHOLD
62k
Figure 6:
Low-side driver for relays with free-wheeling
diode
GND
IACT IHOLD
SW
50Hz
iC-GE100
SYNC
EN
DIAG VB
RACT
6.2k 62k
RHOLD
CSP
10P
10P
CSN
100nF
CVB
RL
1nF
CSG
LED
10..36V
ACP
EN
ACN
GND
RSG
2MEG
100K
RS
2MEG
RSG
RS
100K
CVB
100nF
RL
CSG
1nF
10P
CSP
CSN
10P
6.2k
RACT RHOLD
62k
Figure 7: Utilising the SYNC input
V(AC)
V(SYNC)
V(EN)
I(SW)
I(RL)
Time
Time
Time
Time
Time
IACT
IHOLD
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 benet from synchronous switching may be utilised,
if the switching times are short and reproducible.