ICHAUS IC

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iC-GE100
PWM RELAY/SOLENOID DRIVER
Rev A0.3, Page 1/11
FEATURES
APPLICATIONS
♦
♦
♦
♦
♦ PWM drive for inductive loads
(e.g. 6/12 V relays,
electrovalves) from 24 V
♦ Relay low-/high-side switch
♦
♦
♦
♦
♦
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
CVB
LED
DIAG
VB
SYNC
iC-GE100
SW
EN
IACT
IHOLD
RACT
LSW
0.01..10H
GND
RHOLD
GND
Copyright © 2011 iC-Haus
http://www.ichaus.com
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iC-GE100
PWM RELAY/SOLENOID DRIVER
Rev A0.3, Page 2/11
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 energising 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 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 flyback 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 reduction in the coil is supported by the changeover of
the free-wheeling circuit. The Zener diode now active 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 current in energise mode has not reached the setpoint.
The driver output is shutdown with low voltage or excessive temperature. Alternatively to using an LED
output 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 external R/C network, the switching of the coil can be
synchronised with the load current of e.g. the relay.
PACKAGES SO8, PDIP8 to JEDEC
PIN CONFIGURATION DFN8 3 mm x 3 mm
8
7
6
5
Backside
Pad/Shield
(BP)
1
2
3
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
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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Rev A0.3, Page 3/11
PACKAGE DIMENSIONS
RECOMMENDED PCB-FOOTPRINT
2.40
5
17
R0.
0.65
0.35
2.95
0.70
0.90
1.65
SIDE
BOTTOM
TOP
3
0.65
0.30
0.40
3
1.65
2.38
dra_dfn8-1_pack_1, 15:1
All dimensions given in mm.
iC-GE100
PWM RELAY/SOLENOID DRIVER
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Rev A0.3, Page 4/11
ABSOLUTE MAXIMUM RATINGS
Beyond these values damage may occur; device operation is not guaranteed.
Item
No.
Symbol
Parameter
Conditions
Unit
Min.
Max.
G001 V(VB)
Voltage at VB
-0.3
37
V
G002 I(VB)
Current in VB
-100
6
mA
G003 V(SW)
Voltage at OUT
-0.3
53
V
G004 I(SW)
Output Current in OUT
-6
100
mA
G005 V(DIAG)
Voltage at LED
-0.3
37
V
G006 I(DIAG)
Current in LED
-6
8
mA
G007 V(IACT)
Voltage at ISET
-0.3
7
V
G008 I(IACT)
Current in ISET
-6
6
mA
G009 V(IHOLD)
Voltage at IHOLD
-0.3
7
V
G010 I(IHOLD)
Current in IHOLd
-6
6
mA
G011 V(EN)
Voltage at IN
-0.3
37
V
G012 I(EN)
Current in IN
-6
6
mA
G013 V(SYNC)
Voltage at SYNC
-6
37
V
G014 I(SYNC)
Current in SYNC
-6
6
mA
G015 VD()
Susceptibility to ESD at all pins
2
kV
G016 Tj
Junction Temperature
-40
150
°C
G017 Ts
Storage Temperature
-40
150
°C
HBM 100 pf discharged through 1.5 kΩ
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.
Symbol
Parameter
Conditions
Unit
Min.
T01
Ta
Operating Ambient Temperature Range
T02
Rthja
Thermal Resistance Chip/Ambient
Typ.
-40
surface mounted, thermal pad soldered to ca.
2 cm² heat sink
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.
30
Max.
85
°C
40
K/W
iC-GE100
PWM RELAY/SOLENOID DRIVER
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Rev A0.3, Page 5/11
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.
Symbol
Parameter
Conditions
Unit
Min.
Typ.
Max.
Total Device
001
VB
Permissible Supply Voltage
Range
10
002
I(VB)
Supply Current in VB
EN < 0.8 V
20
µA
003
I(VB)
Supply Current in VB
EN = hi
0.5
4
mA
004
Vc()lo
Clamp Voltage lo at all Pins
I() = -4 mA, other Pins open
-1.4
-0.3
V
005
Vc()lo
Clamp Voltage lo SYNC
I() = -4 mA, other pins open
-6
-0.3
V
006
Vc()hi
Clamp Voltage hi at VB, EN,
DIAG, SYNC
I() = 4 mA, other Pins open
37
V
007
Vc()hi
ClampVoltage hi at IACT, IHOLD I() = 4 mA, other pins open
7
V
008
Vc()hi
ClampVoltage hi at IACT, IHOLD I() = 4 mA, other pins open
7
009
Vc()hi
Clamp Voltage hi at SW
10
I(SW) = 4 mA, referenced to VB, other pins
open
36
V
V
17
V
Driver Output OUT
101
Vs()lo
Saturation Voltage lo
I(SW) = 100 mA (cf. Fig. 1)
600
mV
102
Vs()lo
Saturation Voltage lo
I(SW) = 10 mA (cf. Fig. 1)
100
mV
103
I(SW)
PWM-Current Range
100
mA
104
Isc()
Short-circuit Current
V(SW) = VB
tbd
mA
105
Vc()hi
Clamp Voltage hi at PWM-FreeWheeling
Vc()hi = V(SW) − VB;
EN = hi, I(SW) = 100 mA (cf. Fig. 1)
600
mV
106
Vc()hi
Clamp Voltage hi at PWM-FreeWheeling
Vc()hi = V(SW) − VB;
EN = hi, I(SW) = 10 mA (cf. Fig. 1)
100
mV
107
Vc()off
Clamp Voltage hi at Turn-off
Vc()hi = V(SW) − VB;
EN: hi → lo, I(SW) = 100 mA (cf. Fig. 1)
17
V
108
IIK()
Leakage Current
IN = lo, V(SW) = 0...VB
10
µA
109
twon()min
Minimum PWM Turn-on Duration EN = hi, I(SW) > I(SW)act resp. I(SW)hold
(cf. Figure 1)
250
1000
ns
V
10
100
12
15
1
Input IN
201
Vt()on
Threshold Voltage hi
1.1
1.4
202
Vt()off
Threshold Voltage lo
0.8
1.1
V
203
Vt()hys
Hysteresis
Vt()hys = Vt()on − Vt()off
200
400
mV
204
lpd()
Pull-down Current
V(EN) = 0.8...36 V
20
µA
205
tp(VB-SW) Turn-on Delay after power-up
EN = VB, VB = VBoff → VBon
40
µs
206
tp(EN-SW) Turn-on Delay
EN: lo → hi until SW active
30
µs
207
tp(EN-SW) Turn-off Delay
EN: hi → lo until SW inactive
10
µs
208
tp(ENDIAG)
20
µs
Delay Time from EN to DIAG = hi no error
or LED permanently on
Status Monitor DIAG
401
Ipd()
Pull-down Current
402
VBlo
Permissible Supply Voltage for
LED operation at DIAG
V(DIAG) = 6 V...VB, SW active, no error
3
403
V()hi
Hi-Level at DIAG
404
f()
Frequency on Error
405
Vs()lo
Saturation Voltage lo
I(DIAG) = 200 µA, without LED
406
Ipu()
Pull-up Current
V(DIAG) = 0 ...4 V
407
VBon
Turn-on Threshold at VB
V(DIAG): lo → hi
408
VBoff
Undervoltage Threshold at VB
Decreasing voltage VB, V(DIAG): hi → lo
409
VBhys
Hysteresis
VBhys = VBon − VBoff
200
410
Toff
Thermal Shutdown Temperature
411
Ton
Thermal Release Temperature
Decreasing temperature
412
Thys
Thermal Shutdown Hysteresis
Thys = Toff − Ton
10
5
6
without LED
5
8
mA
36
V
6.5
V
1.8
2.4
3.6
Hz
0.4
V
-120
-100
-80
µA
8
8.5
9
V
7.5
8
8.5
V
500
800
mV
140
170
°C
120
150
°C
30
°C
20
iC-GE100
PWM RELAY/SOLENOID DRIVER
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Rev A0.3, Page 6/11
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.
Symbol
Parameter
Conditions
Unit
Min.
Typ.
Max.
1.14
1.20
1.26
V
Reference IACT and IHOLD
701
V()
Reference Voltage IACT and
IHOLD
702
Isc()
Short-Circuit Current
V(IHOLD) = 0 V or V(IACT) = 0 V
-2.5
-1.8
-0.3
mA
703
K1
Transfer Value for Energising
Current RACT = K1 / I(SW)act
I(SW)act = 10...100 mA
560
620
680
AΩ
704
K2
Transfer Value for Hold Current
RHOLD = K2 / I(SW)hold
I(SW)hold = 10...100 mA
560
620
680
AΩ
80
Oscillator
J01
fosc
Mean Oscillator Frequency
(fmax + fmin) / 2
60
120
kHz
J02
df
Frequency Variation
(fmax − fmin) / (2 ∗ fosc)
12
15
%
-20
20
mV
-10
10
nA
Synchronisation SYNC
S01
Vth()sync
Trigger Threshold at SYNC
S02
Ilk()
Leakage Current
V(SYNC) = -3 V ... 3 V
iC-GE100
PWM RELAY/SOLENOID DRIVER
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Rev A0.3, Page 7/11
ELECTRICAL CHARACTERISTICS: Diagrams
Figure 1: Operation modes: energise mode, hold mode and turn-off
tmag ≈
I(SW )act × LSW
VB
(1)
tdmag ≈
I(SW )hold × LSW
Vc (SW − VB)off
(2)
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iC-GE100
PWM RELAY/SOLENOID DRIVER
Rev A0.3, Page 8/11
APPLICATIONS INFORMATION
Setting the coil current
The following equations can be given for the energise
and hold modes of the PWM control using Electrical
Characteristics Nos. 703 resp. 704:
RACT =
RHOLD =
Example
For a relay with a starting current of 70 mA and 40 mA
hold current the following applies:
K1
I(SW )act
(3)
RACT =
K2
I(SW )hold
(4)
RHOLD =
620ΩA
= 8.8 k Ω
0.07 A
(5)
620ΩA
= 15.5 k Ω
0.04 A
(6)
Application circuits
10..36V
10..36V
LED
DIAG
LED
DIAG
VB
VB
SYNC
SYNC
CVB
100nF
CVB
100nF
iC-GE
iC-GE100
iC-GE100
SW
SW
EN
EN
IACT
RACT
6.2k
IHOLD
IACT
GND
RACT
6.2k
RHOLD
62k
GND
IHOLD
GND
RHOLD
62k
GND
Figure 2: Activation by switching VB
10..36V
DIAG
DIAG
VB
SYNC
CVB
100nF
EN
iC-GE100
SW
EN
IACT
RACT
6.2k
IHOLD
GND
RHOLD
62k
GND
Figure 4: Activation via EN
feedback from DIAG with 5 V logic levels
Figure 3: Activation by switching GND
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iC-GE100
PWM RELAY/SOLENOID DRIVER
Rev A0.3, Page 9/11
10..36V
LED
10..36V
DIAG
VB
SYNC
CVB
100nF
LED
iC-GE100
DIAG
SW
EN
VB
SYNC
IACT
RACT
6.2k
IHOLD
GND
CVB
100nF
RHOLD
62k
iC-GE100
SW
EN
IACT
RACT
6.2k
IHOLD
GND
RHOLD
62k
GND
GND
Figure 5: High-side driver for relays with freewheeling diode
Figure 6: Low-side driver for relays with free-wheeling
diode
CSN
10P
ACN
CSP
10P
10..36V
LED
CVB
100nF
DIAG
VB
50Hz
RS
SYNC
CSG
1nF
100K
RSG
2MEG
RL
iC-GE100
ACP
SW
EN
EN
IACT
RACT
6.2k
IHOLD
GND
RHOLD
62k
GND
Figure 7: Utilising the SYNC input
V(AC)
Time
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.
V(EN)
Time
V(SYNC)
Time
The phase shift is used to compensate the switching
delay of the relay so that the load can be switched at
zero current.
Time
The benefit from synchronous switching may be
utilised, if the switching times are short and reproducible.
IACT
IHOLD
I(SW )
I(RL)
Time
TRelon
Figure 8: Utilising the SYNC input
iC-GE100
PWM RELAY/SOLENOID DRIVER
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Rev A0.3, Page 10/11
iC-Haus expressly reserves the right to change its products and/or specifications. An info letter gives details as to any amendments and additions made to the
relevant current specifications on our internet website www.ichaus.de/infoletter; this letter is generated automatically and shall be sent to registered users by
email.
Copying – even as an excerpt – is only permitted with iC-Haus’ approval in writing and precise reference to source.
iC-Haus does not warrant the accuracy, completeness or timeliness of the specification and does not assume liability for any errors or omissions in these
materials.
The data specified is intended solely for the purpose of product description. No representations or warranties, either express or implied, of merchantability, fitness
for a particular purpose or of any other nature are made hereunder with respect to information/specification or the products to which information refers and no
guarantee with respect to compliance to the intended use is given. In particular, this also applies to the stated possible applications or areas of applications of
the product.
iC-Haus conveys no patent, copyright, mask work right or other trade mark right to this product. iC-Haus assumes no liability for any patent and/or other trade
mark rights of a third party resulting from processing or handling of the product and/or any other use of the product.
As a general rule our developments, IPs, principle circuitry and range of Integrated Circuits are suitable and specifically designed for appropriate use in technical
applications, such as in devices, systems and any kind of technical equipment, in so far as they do not infringe existing patent rights. In principle the range of
use is limitless in a technical sense and refers to the products listed in the inventory of goods compiled for the 2008 and following export trade statistics issued
annually by the Bureau of Statistics in Wiesbaden, for example, or to any product in the product catalogue published for the 2007 and following exhibitions in
Hanover (Hannover-Messe).
We understand suitable application of our published designs to be state-of-the-art technology which can no longer be classed as inventive under the stipulations
of patent law. Our explicit application notes are to be treated only as mere examples of the many possible and extremely advantageous uses our products can
be put to.
iC-GE100
PWM RELAY/SOLENOID DRIVER
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Rev A0.3, Page 11/11
ORDERING INFORMATION
Type
Package
Order Designation
iC-GE100
DFN8 3 mm x 3 mm
iC-GE100 DFN8-3x3
For technical support, information about prices and terms of delivery please contact:
iC-Haus GmbH
Am Kuemmerling 18
D-55294 Bodenheim
GERMANY
Tel.: +49 (61 35) 92 92-0
Fax: +49 (61 35) 92 92-192
Web: http://www.ichaus.com
E-Mail: [email protected]
Appointed local distributors: http://www.ichaus.com/sales_partners