K2391 Data Sheet

K2391
Absolute Maximum Ratings
Input
Voltage
Operating
Storage
Rating
Range
Temperature
Temperature
Symbol
Recommended Operating Conditions
Input
Voltage
Rating
Electrical Characteristics
After tube has been allowed to warm-up for 5 minutes.
External Disable Circuit shown on page 3.
Value
Units
Vin
-0.3
to +5. 5
Vdc
To
-0
to +70
o
C
Tst
g
-40
to +85
o
C
Symbol
Unless
otherwise noted Vin = 5.00 Volts dc and Ta = 25 o
C
Input
Current
Operating
Characteristic
Frequency
Value
Units
Vin
+ 2.5 to 5. 5
Vdc
Symbol
Min
Typ
Max
Units
Iin
- . 97
1.
1 Adc
Fo
40
45
50
KHz
M inimum Output Voltage Vout
(min)
1200
- - Vrms
Efficiency
η - 76
- %
Output
Current (per tube)
Output Voltage (per tube)
(When powering a load
simulating the referenced
display.)
Iout
- 5.
2 - marms
Vout
- 355
- Vrms
Pin3
Input Current Requirement - - 11
- madc
Specifications subject to change without notice.
Relative Frequency
Input Power (Watts)
25%
20%
15%
10%
5%
0%
Relative Frequency vs.Input Voltage
-5%
2.00 3.00 4.00 5.00 6.00
Input Voltage (Vdc)
7.0
6.0
5.0
4.0
3.0
2.0
1.0
Input Power vs.Input Voltage
0.0
2.00 3.00 4.00 5.00 6.00
Input Voltage (Vdc)
Disable Circuit
Typical Performance Curves
Control
1 K
3.3 K
Relative Brightness
Input Current (Adc)
1.5 K
2N3904
140%
120%
100%
80%
60%
40%
20%
+Vin 5V
2N3906
1N4148
Relative Brightness vs.Input Voltage
Control (pin 3)
K2391
0%
2.00 3.00 4.00 5.00 6.00
Input Voltage (Vdc)
1.20
1.00
0.80
0.60
0.40
0.20
Input Current vs.Input Voltage
0.00
2.00 3.00 4.00 5.00 6.00
Input Voltage (Vdc)
Endicott Research Group, Inc.
Made in USA
page 2.
Endicott Research Group, Inc.
Valid with the "C" jumper removed
page 3.