IC-GE100_15 Datasheet, PDF (2/12 Pages) IC-Haus GmbH – PWM RELAY/SOLENOID DRIVER

iC-GE100
PWM RELAY/SOLENOID DRIVER
preliminary
Rev B1, Page 2/12
DESCRIPTION
iC-GE100 is a PWM driver for inductive loads, such as
relay coils, solenoid valves and other inductive loads.
The setpoints for the coil’s energising and hold current
are pre-set by means of external resistors RACT and
RHOLD. These currents can be set in a range from
10 to 100 mA. The iC-GE100 switches from energis-
ing to hold mode after 50 ms provided that the set
energising current has been reached.
The changeover between energising and hold modes
is suitable for typical relay drives which require a pow-
erful initial energising current which can then be re-
duced after closing the air gap in a magnetic circuit.
The quadratic dependence on the current intensity
means that cutting the current by half reduces the
power dissipation by ca. 75%.
Using PWM the output current is controlled to the
values set at RACT and RHOLD. The internal fly-
back diode maintains the current during the switching
pauses. The switching frequency of ca. 80 kHz is
provided by the internal oscillator.
The device is shutdown by a Low signal at input EN
or the removal of the power supply; the current reduc-
tion in the coil is supported by the changeover of the
free-wheeling circuit. The Zener diode now active per-
mits higher free-wheeling voltages and thus a quicker
demagnetising of the coil.
The status indicator LED is constantly ON when hold
mode is functioning correctly and flashes with low volt-
age, excessive temperature or when the coil current
in energise mode has not reached the setpoint. The
driver output is shutdown with low voltage or exces-
sive temperature. Alternatively to using an LED out-
put DIAG signals the correct operating by outputting
a high signal.
The input signal at EN can be synchronised with the
zero crossing at input SYNC. Thus by using an ex-
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
8765
Backside
Pad/Shield
(BP)
PIN FUNCTIONS
No. Name Function
1 GND Ground
2 SW PWM Output
3 VB +10...36 V Supply Voltage
4 IHOLD Hold Current Setup
5 IACT Energising Current Setup
6 DIAG Status Output
7 SYNC Sync Input
8 EN Enable Input
1 234
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).