led flasher - CREATIVE CHIPS GmbH

CCA 4100 Flasher/Oscillator
LED FLASHER
IC-Layout
FEATURES
?? LED-Flash-Light driver IC
?? very long operation time with only one 1.5V battery
cell
?? minimum external devices (capacitor)
?? large operating range from 1 to 5V
?? average current drain under 500µA (over battery
live cycle)
?? wide temperature range
?? low cost
?? fully function compatible to LM3909
GENERAL DESCRIPTION
The CCA4100 is an insensitive and easy to use IC to flash
Light Emitting Diodes (LEDs). For operating it only needs an
external capacitor and a standard 1,5V battery cell.
The circuite is self starting and includes internal timing
resistors and a resistor to limit LED current. The device is
optimised for minimal power drain at 1,5V and 3V at nominal
flashing rates.
Typical Applications are toys, advertising gimmicks or novelties
but also applications with necessity to locate something in the
dark as fishing floats, fire alarms and fire extinguishers or
emergency switches and exits.
The circuit could also be used for electronic applications as
triggers and saw tooth generators.
PIN CONFIGURATION (SOP 8)
F-RC
1
8
S-RC
OUT
2
7
NC
NC
3
6
RL
GND
4
5
Vcc
CCA
4100
Dok.-Nr.: DD0013
LED-Flasher
PIN
1
2
3
4
5
6
7
8
NAME
F-RC
Out
NC
GND
VCC
RL
NC
S-RC
-1-
DESCRIPTION
Fast Frequency
Voltage Output to charge capacitor
no connected
ground
supply voltage
current limited resistor out
no connected
Slow Frequency
Ro/13.03.01
CCA 4100 Flasher/Oscillator
ELECTRICAL CHARACTERISTICS
o
Conditions unless otherwise specified:
Parameter
Supply voltages
Flash Frequency
High Flash Frequency
Current
Peak LED current
Pulse Width
o
-40 C < TOP < 85 C;
Symbol
VCC , VDD
f
fh
I
ILEDmax
TPW
Conditions
C 300µF (5%)
C 0,30 µF (5%)
in operation mode
C 350 µF
C 350 µF at half amplitude
Min.
1.1
0,65
Typ.
1,0
1,1
0,55
45
6,0
Max.
6.0
1,3
0,75
Application example
300µ / 3 V
1
8
2
7
CCA
4100
3
6
4
5
1,5 V
Dok.-Nr.: DD0013
LED-Flasher
Flash rate: ~ 1 Hz
-2-
Ro/13.03.01
Unit
V
Hz
KHz
mA
mA
ms
CCA 4100 Flasher/Oscillator
REVISION HISTORY
Revision
1.0
Date
03/13/01
Author
Roland Obst
Item
Data sheet
CREATIVE CHIPS GmbH
Am Ockenheimer Graben 54
D-55411 Bingen / Rhein
Germany
Phone: +49 (0) 6721 7999 10
Fax:
+49 (0) 6721 7999 12
Email:
[email protected]
Internet:
http://www.creativechips.com
Dok.-Nr.: DD0013
LED-Flasher
-3-
Ro/13.03.01