iC-JE
PWM RELAY/SOLENOID DRIVER
FEATURES
APPLICATIONS
Wide operating voltage range of 10..45Vdc
PWM control for coil currents of 40..300mA
Coil current for energize and hold modes set by an external
resistor
Coil current monitored during energize mode, detection of
load breakage and voltage errors
Automatic current reduction after 100ms to reduce the power
consumption in hold mode
The internal free-wheeling alteration function supports PWM
operation and quick demagnetizing during shutdown
Status report given at the current-limited LED output
Shutdown with excessive temperature and low voltage
Integrated oscillator needs no external components
PWM frequency is beyond audible range
Protective circuitry against damage by ESD
Minimum space requirements, few external components
PWM drive for inductive loads
(e.g. relays, electrovalves)
Relay low/high-side switch
PACKAGES
PDIP8
SO8
BLOCK DIAGRAM
1999
Rev D0
I
-
MUX
MUX
t=25us
15V
HOLD
INI
ERR
V
1.2V
x0.66
x1.0
INI
-
+
1
0
+
80kHz
HOLD
PWMOK
PWMOK
EN
R
Q
S
OUT
7
VB
8
6
GND
3
IN
ISET
2
1
LED
GND
10..45V
START
t>=100ms
ON
2.4Hz
OFF
RSET
10..60k
0.01..10H
LOUT
iC-JE
CONTROL
PWM
DELAY
HOLD MODE
RESET
TURN-ON
THERMAL SHUTDOWN
LOW VOLTAGE
INPUT
REFERENCE
DRIVER OUTPUT
TURN-ON CURRENT
CONTROL
iC-Haus GmbH
Tel
+49-6135-9292-0
Integrated Circuits
Fax +49-6135-9292-192
Am Kuemmerling 18, D-55294 Bodenheim
http://www.ichaus.com
iC-JE
PWM RELAY/SOLENOID DRIVER
Rev D0, Page 2/10
DESCRIPTION
iC-JE is a PWM driver for inductive loads, such as relay coils, solenoid valves and small DC motors.
The setpoint for the coil current is preset with the help of the RSET external resistor. 60..300mA can be set
for energize mode which then automatically drop to 2/3 of this value (40..200mA) during hold mode. The
device is switched to hold mode after 100ms provided that the set coil current is obtained during energizing
(PWMOK= 1).
The changeover between energize and hold modes is suitable for typical relay drives which require a
powerful initial energizing current which can then be reduced after closing the air gap in a magnetic circuit.
The quadratic dependence on the current intensity means that the power dissipation of the system is more
than halved through this reduction.
The output current is measured with zero loss at the power transistor's ON resistance and compared to the
setpoint. In order to maintain this setpoint, the switch-on time of the coil driver is modulated by the pulse
width. The internal flyback diode maintains the current during the switching pauses. The switching
frequency of ca. 80kHz is provided by the internal oscillator.
The device is shutdown by a lo signal at input IN 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 demagnetizing 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 energize mode has not reached the setpoint.
The driver output is shutdown with low voltage or excessive temperature.
The device is protected against destruction by ESD.
PACKAGES PDIP8, SO8 to JEDEC Standard
PIN CONFIGURATION PDIP8
PIN FUNCTIONS
(top view)
No. Name Function
1
LED
State monitor
2
ISET
PWM Reference Current
(setpoint adjustment)
3
IN
Input
4
n.c.
5
n.c.
6
GND
Ground
7
OUT
PWM Output
8
VB
+10 to 45V Supply Voltage
PIN CONFIGURATION SO8
(top view)
iC-JE
PWM RELAY/SOLENOID DRIVER
Rev D0, Page 3/10
ABSOLUTE MAXIMUM RATINGS
Values beyond which damage may occur; device operation is not guaranteed.
Item
Symbol
Parameter
Conditions
Fig.
Unit
Min.
Max.
G001 V(VB)
Voltage at VB
-0.3
48
V
G002 I(VB)
Current in VB
-350
6
mA
G003 V(OUT)
Voltage at OUT
-0.3
60
V
G004 I(OUT)
Output Current in OUT
-6
350
mA
G005 V(LED)
Voltage at LED
-0.3
VB
V
G006 I(LED)
Current in LED
-6
8
mA
G007 V(ISET)
Voltage at ISET
-0.3
48
V
G008 I(ISET)
Current in ISET
-6
6
mA
G009 V(IN)
Voltage at IN
-0.3
48
V
G010 I(IN)
Current in IN
-6
6
mA
TG1 Tj
Junction Temperature
-40
150
C
TG2 Ts
Storage Temperature
-40
150
C
THERMAL DATA
Operating Conditions: VB= 10..45V, LOUT= 0.01..10H, RSET= 10..60k
Item
Symbol
Parameter
Conditions
Fig.
Unit
Min.
Typ.
Max.
T1
Ta
Operating Ambient Temperature
Range
-25
80
C
T2
Rthja
Thermal Resistance Chip / Ambient
PDIP8 package
110
K/W
T3
Rthja
Thermal Resistance Chip / Ambient
SO8 package
140
K/W
All voltages are referenced to ground unless otherwise noted.
All currents into the device pins are positive; all currents out of the device pins are negative.
iC-JE
PWM RELAY/SOLENOID DRIVER
Rev D0, Page 4/10
ELECTRICAL CHARACTERISTICS
Operating Conditions: VB= 10..45V, LOUT= 0.01..10H, RSET= 10k..60k
, Tj= -25..125
C, unless otherwise noted.
LED connected or pin LED linked to GND.
Item
Symbol
Parameter
Conditions
Tj
Fig.
Unit
C
Min.
Typ.
Max.
Total Device
001
VB
Permissible Supply Voltage
Range
10
45
V
002
I(VB)
Supply Current in VB
Outputs OUT, LED disabled
0.5
2
mA
003
I(VB)
Supply Current in VB
Output OUT enabled
0.5
3
mA
004
Vc()lo
Clamp Voltage lo at all Pins
I()= -4mA, other Pins open
-1.4
-0.3
V
005
Vc()hi
Clamp Voltage hi at
VB, IN, ISET
I()= 4mA, other Pins open
48
57
V
006
Vc()hi
Clamp Voltage hi at OUT
I(OUT)= 4mA, other Pins open
60
71
V
007
Vc()hi
Clamp Voltage hi at LED vs. VB
Vc()hi= V(LED)-V(VB)
I(LED)= 4mA, other Pins open
0.3
1.4
V
Driver Output OUT
101
Vs()lo
Saturation Voltage lo
I(OUT)= 200mA
1
360
600
mV
102
Vs()lo
Saturation Voltage lo
I(OUT)= 300mA
1
550
850
mV
103
PWMthi
Permissible Energizing Current
1
300
mA
104
PWMthi
Permissible Hold Current
1
40
mA
105
Isc()
Short-circuit Current
V(OUT)= VB
0.6
1
1.7
A
106
Vc()hi
Clamp Voltage hi at
PWM-Free-Wheeling
Vc()hi= V(OUT)-VB;
IN= hi, I(OUT)= 200mA
1
1
1.5
V
107
Vc()hi
Clamp Voltage hi at
PWM-Free-Wheeling
Vc()hi= V(OUT)-VB;
IN= hi, I(OUT)= 300mA
1
1.4
2
V
108
Vc()off
Clamp Voltage hi at
Turn-off
Vc()hi= V(OUT)-VB;
IN: hi
lo, I(OUT)= 200mA
1
12
15
17
V
109
IIK()
Leakage Current
IN= lo, V(OUT)= 0..VB
1
10
A
110
twon()min Minimum PWM Turn-on Duration IN= hi, ISET open
1
250
1000
ns
111
C()
Permissible Load Capacitance
1
nF
Input IN
201
Vt()on
Threshold Voltage hi
2.6
2.85
3.2
V
202
Vt()off
Threshold Voltage lo
1.7
2.0
2.3
V
203
Vt()hys
Hysteresis
Vt()hys= Vt()on-Vt()off
0.7
0.85
1.1
V
204
lpd()
Pull-down Current
V(IN)= 4..45V
50
100
200
A
205
Rpd()
Pull-down Resistor
V(IN)= 0..4V
20
50
80
k
206
tp(IN-
OUT)
Turn-on Delay
IN: lo
hi
20
s
207
tp(IN-
OUT)
Turn-off Delay
IN: hi
lo
10
s
208
tp(VB-
OUT)
Turn-on Delay when VB is
powered up
IN= VB, VB= VBoff
VBon
40
s
209
tp(IN-
LED)
Delay Time from IN to LED
(with light permanently on)
PWMOK= 1 before tpPMWlo
65
100
135
ms
210
tp(IN-
LED)
Delay Time from IN to LED
(with light flashing)
PWMOK= 0
130
200
270
ms
iC-JE
PWM RELAY/SOLENOID DRIVER
Rev D0, Page 5/10
ELECTRICAL CHARACTERISTICS
Operating Conditions: VB= 10..45V, LOUT= 0.01..10H, RSET= 10k..60k
, Tj= -25..125
C, unless otherwise noted.
LED connected or pin LED linked to GND.
Item
Symbol
Parameter
Conditions
Tj
Fig.
Unit
C
Min.
Typ.
Max.
State Monitor LED
301
Ipd()
Pull-down Current
V(LED)= 5V..VB
3
5
8
mA
302
Vs()lo
Saturation Voltage lo
I(LED)= 200
A
0.4
V
303
Ipu()
Pull-up Current
V(LED)= 0V..(VB-1V)
-20
-100
-300
A
304
VBlo
Permissible Supply Voltage for
Monitoring Function
6
45
V
305
VBon
Turn-on Threshold at VB
7.6
8
8.4
V
306
VBoff
Undervoltage Threshold at VB
decreasing voltage VB
7.1
7.5
7.9
V
307
VBhys
Hysteresis
VBhys= VBon-VBoff
200
500
800
mV
308
Toff
Thermal Shutdown Temperature
130
140
150
C
309
Ton
Thermal Lock-on Threshold
decreasing temperature
110
120
130
C
310
Thys
Thermal Shutdown Hysteresis
Thys= Toff-Ton
10
20
30
C
311
f()
Flash Frequency on Error
ERR= hi or PWMOK= 0
VB= 6..45V
1.8
2.4
3.6
Hz
Reference ISET
401
V()
Reference Voltage
1.14
1.20
1.26
V
402
Isc()
Short-Circuit Current
V(ISET)= 0V
-2.5
-1.8
-0.3
mA
403
K1
Transfer Value for Energizing
Current RSET= K1 / I(OUT)start
I(OUT)start= 60..150mA
2900
3250
3600
A
404
K1
Transfer Value for Energizing
Current RSET= K1 / I(OUT)start
I(OUT)start= 150..300mA
2900
3250
3600
A
405
CRrel
Relative Current Ratio
It(OUT)hold / It(OUT)start
(Trigger Thresholds Ratio:
Hold vs. Energize Mode)
I(OUT)start= 60..150mA
1
63
66
69
%
406
CRrel
Relative Current Ratio
It(OUT)hold / It(OUT)start
(Trigger Thresholds Ratio:
Hold vs. Energize Mode)
I(OUT)start= 150..300mA
1
63
66
69
%
407
K2
Transfer Value for Hold Current
RSET= K2 / I(OUT)hold
I(OUT)hold= 40..100mA
1930
2160
2400
A
408
K2
Transfer Value for Hold Current
RSET= K2 / I(OUT)hold
I(OUT)hold= 100..200mA
1930
2160
2400
A
Oscillator
501
fosc
Oscillator Frequency
1
60
80
120
kHz
Turn-on Current Control
601
tpPWMlo Hold Mode Propagation Delay
PWMOK= 1 before tpPWMlo
65
100
135
ms
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