iC-JE
PWM RELAY/SOLENOID DRIVER
Rev F1, Page 1/9
FEATURES
o
Wide operating voltage range of 10 to 45 Vdc
o
PWM control for coil currents of 40 to 300 mA
o
Coil current for energise and hold modes set by an external
resistor
o
Coil current monitored during energise mode, detection of load
breakage and voltage errors
o
Automatic current reduction after 100 ms to reduce the power
consumption in hold mode
o
The internal free-wheeling alteration function supports PWM
operation and quick demagnetising during shutdown
o
Status signalled at the current-limited LED output
o
Shutdown with excessive temperature and low voltage
o
Integrated oscillator needs no external components
o
PWM frequency is beyond audible range
o
Protective circuitry against damage by ESD
o
Minimum space requirements, few external components
APPLICATIONS
o
PWM drive for inductive loads
(e.g. relays, electrovalves)
o
Relay low-/high-side switch
PACKAGES
SO8
PDIP8
BLOCK DIAGRAM
10...45 V
LOW VOLTAGE
THERMAL SHUTDOWN
ERR
TURN−ON CURRENT
CONTROL
EN
PWMOK
HOLD MODE
DELAY
START
t >= 100 ms
TURN−ON
RESET
t = 25 us
HOLD
DRIVER OUTPUT
VB
8
INI
1
LED
MUX
HOLD
ON
2.4 Hz
OFF
15 V
S Q
R
LOUT
0.01...10 H
OUT
I
V
−
+
7
3
IN
INI
INPUT
REFERENCE
x1.0
x0.66
+
−
0
MUX
1
PWM
CONTROL
GND
6
80 kHz
PWMOK
iC−JE
ISET
2
1.2 V
RSET
10...60 kΩ
GND
Copyright © 2007 iC-Haus
ICHAUS [ IC-HAUS GMBH ]
