iC-GE100
PWM RELAY/SOLENOID DRIVER
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APPLICATIONS
o
PWM drive for inductive loads
(e.g. 6/12 V relays,
electrovalves) from 24 V
o
Relay low-/high-side switch
FEATURES
o
o
o
o
o
o
o
o
o
Current control for inductive actuators at 24 V (10 to 36 V)
Power saving and power dissipation reduced switching
Individual setting of energising and hold current
Contact conserving switching of relays synchronous to the
mains
High efficient current control up to 100 mA
Monitoring of coil current, supply voltage and temperature
Shutdown with overtemperature and undervoltage
Status indication via LED or logic output
Fast demagnetising with 15 V countervoltage
PACKAGES
DFN8-3x3
BLOCK DIAGRAM
VB
LED
DIAG
SYNC
VB
CVB
iC-GE100
SW
EN
LSW
0.01..10H
IACT
IHOLD
GND
RACT
GND
RHOLD
Copyright © 2013 iC-Haus
http://www.ichaus.com
iC-GE100
PWM RELAY/SOLENOID DRIVER
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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 cur-
rent 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 en-
ergising 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
powerful initial energising current which can then be
reduced after closing the air gap in a magnetic cir-
cuit. The quadratic dependence on the current inten-
sity 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 switch-
ing 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 re-
duction in the coil is supported by the changeover of
the free-wheeling circuit. The Zener diode now ac-
tive permits 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
voltage, excessive temperature or when the coil cur-
rent in energise mode has not reached the setpoint.
The driver output is shutdown with low voltage or ex-
cessive temperature. Alternatively to using an LED
output DIAG signals the correct operating by out-
putting 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
PIN FUNCTIONS
No. Name Function
1
2
3
4
5
6
7
8
GND
SW
VB
IHOLD
IACT
DIAG
SYNC
EN
Ground
PWM Output
+10...36 V Supply Voltage
Hold Current Setup
Energising Current Setup
Status Output
Sync Input
Enable Input
8
7
6
5
Backside
Pad/Shield
(BP)
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 (
subject to change).
GE100 label and coding is
iC-GE100
PWM RELAY/SOLENOID DRIVER
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PACKAGE DIMENSIONS DFN8-3x3
All dimensions given in mm.
RECOMMENDED PCB-FOOTPRINT
2.40
17
R0.
5
SIDE
0.90
2.95
1.65
0.65
0.35
TOP
3
BOTTOM
2.44
0.65
0.27
0.40
dra_dfn8-2_pack_1, 15:1
1.70
3
0.70
iC-GE100
PWM RELAY/SOLENOID DRIVER
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ABSOLUTE MAXIMUM RATINGS
Beyond these values damage may occur; device operation is not guaranteed.
Item
No.
Symbol
Parameter
Voltage at VB
Current in VB
Voltage at OUT
Output Current in OUT
Voltage at LED
Current in LED
Voltage at ISET
Current in ISET
Voltage at IHOLD
Current in IHOLd
Voltage at IN
Current in IN
Voltage at SYNC
Current in SYNC
Susceptibility to ESD at all pins
Junction Temperature
Storage Temperature
HBM 100 pf discharged through 1.5 kΩ
-40
-40
Conditions
Min.
-0.3
-100
-0.3
-6
-0.3
-6
-0.3
-6
-0.3
-6
-0.3
-6
-6
-6
Max.
37
6
53
100
37
8
7
6
7
6
37
6
37
6
2
150
150
V
mA
V
mA
V
mA
V
mA
V
mA
V
mA
V
mA
kV
°C
°C
Unit
G001 V(VB)
G002 I(VB)
G003 V(SW)
G004 I(SW)
G005 V(DIAG)
G006 I(DIAG)
G007 V(IACT)
G008 I(IACT)
G009 V(IHOLD)
G010 I(IHOLD)
G011 V(EN)
G012 I(EN)
G013 V(SYNC)
G014 I(SYNC)
G015 VD()
G016 Tj
G017 Ts
THERMAL DATA
Operating Conditions: VB = 10...36 V, LSW = 0.01...10 H, RACT = 6.2 k...62 kΩ, RHOLD = 6.2 k...62 kΩ
Item
No.
T01
T02
Symbol
Ta
Rthja
Parameter
Operating Ambient Temperature Range
Thermal Resistance Chip/Ambient
surface mounted, thermal pad soldered to ca.
2 cm² heat sink
Conditions
Min.
-40
30
Typ.
Max.
85
40
°C
K/W
Unit
All voltages are referenced to ground unless otherwise stated.
All currents flowing into the device pins are positive; all currents flowing out of the device pins are negative.
iC-GE100
PWM RELAY/SOLENOID DRIVER
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ELECTRICAL CHARACTERISTICS
Operating Conditions: VB = 10...36 V, LSW = 0.01...10 H, RACT = 6.2 k...62 kΩ, RHOLD = 6.2 k...62 kΩ, Tj = -40...125 °C.
Item
No.
001
002
003
004
005
006
007
008
009
Symbol
Parameter
Conditions
Min.
VB
I(VB)
I(VB)
Vc()lo
Vc()lo
Vc()hi
Vc()hi
Vc()hi
Vc()hi
Permissible Supply Voltage
Range
Supply Current in VB
Supply Current in VB
Clamp Voltage lo at all Pins
Clamp Voltage lo SYNC
Clamp Voltage hi at VB, EN,
DIAG, SYNC
EN < 0.8 V
EN = hi
I() = -4 mA, other Pins open
I() = -4 mA, other pins open
I() = 4 mA, other Pins open
37
7
7
10
17
0.5
-1.4
10
Typ.
Max.
36
20
4
-0.3
-7
V
µA
mA
V
V
V
V
V
V
Unit
Total Device
ClampVoltage hi at IACT, IHOLD I() = 4 mA, other pins open
ClampVoltage hi at IACT, IHOLD I() = 4 mA, other pins open
Clamp Voltage hi at SW
I(SW) = 4 mA, referenced to VB, other pins
open
I(SW) = 100 mA (cf. Fig. 1)
I(SW) = 10 mA (cf. Fig. 1)
Driver Output OUT
101
102
103
104
105
106
107
108
109
Vs()lo
Vs()lo
I(SW)
Isc()
Vc()hi
Vc()hi
Vc()off
IIK()
twon()min
Saturation Voltage lo
Saturation Voltage lo
PWM-Current Range
Short-circuit Current
Clamp Voltage hi at PWM-Free-
Wheeling
Clamp Voltage hi at PWM-Free-
Wheeling
Clamp Voltage hi at Turn-off
Leakage Current
V(SW) = VB
Vc()hi = V(SW)
−
VB;
EN = hi, I(SW) = 100 mA (cf. Fig. 1)
Vc()hi = V(SW)
−
VB;
EN = hi, I(SW) = 10 mA (cf. Fig. 1)
Vc()hi = V(SW)
−
VB;
EN: hi
→
lo, I(SW) = 100 mA (cf. Fig. 1)
IN = lo, V(SW) = 0...VB
250
12
15
1
600
100
10
100
100
tbd
600
100
17
10
1000
mV
mV
mA
mA
mV
mV
V
µA
ns
Minimum PWM Turn-on Duration EN = hi, I(SW) > I(SW)act resp. I(SW)hold
(cf. Figure 1)
Threshold Voltage hi
Threshold Voltage lo
Hysteresis
Pull-down Current
Vt()hys = Vt()on
−
Vt()off
V(EN) = 0.8...36 V
EN = VB, VB = VBoff
→
VBon
EN: lo
→
hi until SW active
EN: hi
→
lo until SW inactive
Input IN
201
202
203
204
205
206
207
208
Vt()on
Vt()off
Vt()hys
lpd()
1.1
0.8
200
1.4
1.1
400
20
40
30
10
20
V
V
mV
µA
µs
µs
µs
µs
tp(VB-SW) Turn-on Delay after power-up
tp(EN-SW) Turn-on Delay
tp(EN-SW) Turn-off Delay
tp(EN-
DIAG)
Ipd()
VBlo
V()hi
f()
Vs()lo
Ipu()
VBon
VBoff
VBhys
Toff
Ton
Thys
Delay Time from EN to DIAG = hi no error
or LED permanently on
Pull-down Current
Permissible Supply Voltage for
LED operation at DIAG
Hi-Level at DIAG
Frequency on Error
Saturation Voltage lo
Pull-up Current
Turn-on Threshold at VB
Undervoltage Threshold at VB
Hysteresis
Thermal Shutdown Temperature
Thermal Release Temperature
Thermal Shutdown Hysteresis
Decreasing temperature
Thys = Toff
−
Ton
I(DIAG) = 200 µA, without LED
V(DIAG) = 0 ...4 V
V(DIAG): lo
→
hi
Decreasing voltage VB, V(DIAG): hi
→
lo
VBhys = VBon
−
VBoff
without LED
V(DIAG) = 6 V...VB, SW active, no error
Status Monitor DIAG
401
402
403
404
405
406
407
408
409
410
411
412
3
6
3.4
1.8
-120
8
7.5
200
140
120
10
20
2.4
-100
8.5
8
500
5
8
36
5.0
3.6
0.4
-80
9
8.5
800
170
150
30
mA
V
V
Hz
V
µA
V
V
mV
°C
°C
°C
Embedded System
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