iC-GE100
PWM RELAY/SOLENOID DRIVER
Rev A1, Page 2/12
DESCRIPTION
iC-GE100 is a PWM driver for inductive loads, such ing pauses. The switching frequency of ca. 80 kHz is
as relay coils, solenoid valves and other inductive provided by the internal oscillator.
loads.
The device is shutdown by a Low signal at input EN
The setpoints for the coil’s energising and hold cur- or the removal of the power supply; the current re-
rent are pre-set by means of external resistors RACT duction in the coil is supported by the changeover of
and RHOLD. These currents can be set in a range the free-wheeling circuit. The Zener diode now ac-
from 10 to 100 mA. The iC-GE100 switches from en- tive permits higher free-wheeling voltages and thus a
ergising to hold mode after 50 ms provided that the quicker demagnetising of the coil.
set energising current has been reached.
The status indicator LED is constantly ON when hold
The changeover between energising and hold modes mode is functioning correctly and flashes with low
is suitable for typical relay drives which require a voltage, excessive temperature or when the coil cur-
powerful initial energising current which can then be rent in energise mode has not reached the setpoint.
reduced after closing the air gap in a magnetic cir- The driver output is shutdown with low voltage or ex-
cuit. The quadratic dependence on the current inten- cessive temperature. Alternatively to using an LED
sity means that cutting the current by half reduces output DIAG signals the correct operating by out-
the power dissipation by ca. 75%.
putting a high signal.
Using PWM the output current is controlled to the The input signal at EN can be synchronised with the
values set at RACT and RHOLD. The internal fly- zero crossing at input SYNC. Thus by using an ex-
back diode maintains the current during the switch- ternal R/C network, the switching of the coil can be
synchronised with the load current of e.g. the relay.
PACKAGING INFORMATION DFN8-3x3
PIN CONFIGURATION DFN8 3 mm x 3 mm
PIN FUNCTIONS
No. Name Function
1 GND Ground
8
7
6
5
2 SW
3 VB
PWM Output
+10...36 V Supply Voltage
4 IHOLD Hold Current Setup
5 IACT Energising Current Setup
6 DIAG Status Output
Backside
Pad/Shield
(BP)
7 SYNC Sync Input
8 EN
Enable Input
1
2
3
4
The Thermal Pad is to be connected to a Ground Plane (GND) on the PCB.
Only pin 1 marking on top or bottom defines the package orientation ( GE100 label and coding is
subject to change).
ICHAUS [ IC-HAUS GMBH ]
