iC-JE
PWM RELAY/SOLENOID DRIVER
Rev F1, Page 1/9
FEATURES
APPLICATIONS
♦ Wide operating voltage range of 10 to 45 Vdc
♦ PWM control for coil currents of 40 to 300 mA
♦ Coil current for energise and hold modes set by an external
resistor
♦ PWM drive for inductive loads
(e.g. relays, electrovalves)
♦ Relay low-/high-side switch
♦ Coil current monitored during energise mode, detection of load
breakage and voltage errors
♦ Automatic current reduction after 100 ms to reduce the power
consumption in hold mode
♦ The internal free-wheeling alteration function supports PWM
operation and quick demagnetising during shutdown
♦ Status signalled 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
PACKAGES
♦ Protective circuitry against damage by ESD
♦ Minimum space requirements, few external components
PDIP8
SO8
BLOCK DIAGRAM
10...45 V
TURN−ON CURRENT
DRIVER OUTPUT
VB
8
LOW VOLTAGE
ERR
THERMAL SHUTDOWN
CONTROL
EN
INI
PWMOK
15 V
HOLD
HOLD MODE
DELAY
1
LED
S Q
R
ON
START
t >= 100 ms
2.4 Hz
OFF
MUX
LOUT
0.01...10 H
I
V
OUT
GND
7
TURN−ON
RESET
−
+
t = 25 us
HOLD
PWM
CONTROL
REFERENCE
3
IN
0
6
x1.0
INI
MUX
1
80 kHz
x0.66
INPUT
PWMOK
+
−
1.2 V
iC−JE
ISET
2
RSET
10...60 kΩ
GND
Copyright © 2007 iC-Haus
http://www.ichaus.com