iC-NT
LIGHT CHAIN PULSE DRIVER
FEATURES
♦
Adjustable LED pulse operation, set range of 0.4..1A
♦
Controlled current slew rate enables short light pulses
down to 1µs
♦
LED efficiency degradation compensated by positive current
temperature coefficient
♦
Low standby current; circuit activation by input data
♦
Low power requirement for external set resistor
♦
Control logic with 3-step shift register
♦
Compatible to CMOS levels
♦
Data output buffer with built-in 120Ω wave impedance
adaption
♦
Single 5V supply
♦
Thermal shutdown and power-down reset
♦
ESD protection
♦
Small outline package SO8
♦
Suited for high-risk applications according to IEC 1496-1
◊
Option: Extended temperature range of -20°C..85°C
APPLICATIONS
♦
Electro-sensitive protective
equipment (ESPE)
♦
Light curtain LED driver
♦
Light barrier LED driver
PACKAGES
SO8
BLOCK DIAGRAM
+5V
2
VDD
CONTROL INPUTS
iC-NT
LOGIC
OUTPUT BUFFER
1
DIN
6µA
DOUT
FF1
D
C
R
6µA
Q
Q1
6
FF2
D
C
R
Q
Q2
FF3
3
CLK
&
D
C
R
Q
Q3
LED CURRENT SINK
VDD
+5V
4
SHEN
SEND
6µA
S
Dis
500Ω
LED
8
1
1
VDD
ENABLE
A
1:1200
VTREF
PDR
TR
POWER DOWN
RESET
REFERENCE AND
THERMAL SHUTDOWN
+
-
50Ω
ISET
5
RSET
GND
7
©1997
iC-Haus GmbH
Integrierte Schaltkreise
Am Kuemmerling 18, 55294 Bodenheim
Rev A0
1.8kΩ
Tel (+49)6135-9292-0
Fax (+49)6135-9292-192
http://www.ichaus.com
ICHAUS [ IC-HAUS GMBH ]
