Two Tube
DC to AC Inverter
page 4.
E1950C
Preliminary
E1950C
Specifications and
Applications Information
* Input bypass capacitor may be required (10uf - 100uf)
Connection Diagram
The ERG E1950C (E200II Series) dc to ac inverter is
specifically designed to power the Sharp LQ10D421
LCD display module to a nominal brightness level from
a +12 volt dc source.
The E1950Cs small size and encapsulated package
makes it the ideal power source for applications where
small size, high efficiency and reliability are critical.
This inverter is designed to satisfy the most common
cold-cathode lighting requirements for the Sharp
LQ10D421 display where a PWM dimming control
option is desired. Custom units, providing different
inputs, outputs or package refinements are available.
E200II Package
08/04/00
5
4
3
6
1
2
-
+
Vin
1
2
64
5
3
*
+
-
Vin
E1950C
Two CCF Tubes
* should be selected to be compatible with LCD and display driver
Control (+5.0V)
330 S
Control
approx. 6.6 ms*
+5.0V
0
Enable
Please Note: Values for PWM Control Voltage and Control Resistor have been selected to
maintain a Minimum Source Current of 15mAdc. Any deviations to the values specified above
may result in unreliable operation and/or Inverter damage. Dimming of tubes is only possible
by varying the Duty cycle of the PWM signal.
E1950C Inverter with PWM Dimming/Disable
PWM
Signal
Disable
5% - 100% Controls Dimming
330 S
Two CCF Tubes
1. Vin(+) 4. Vout(AC)
2. Vin(-) 5. Vout(AC)
3. Common 6. Control
Package Configuration
1.26[32,0]
Max
.60[15,24]
Max
.15[3,8]
Min
1.56
[39,7]
Max 1.100
[27,94]
.28[7,1]
.700[17,78]
.400[10,16]
.22[5,6] .800[20,32]
.300[7,62]
.025[0,64] Square (6X)
.300[7,62]
1
6
34
2
5
Endicott Research Group, Inc.
2601 Wayne St., Endicott NY 13760
607-754-9187 Fax 607-754-9255
http://www.ergpower.com
Endicott Research Group, Inc.
2601 Wayne St., Endicott NY 13760
607-754-9187
E1950C E1950C
Endicott Research Group, Inc.
Endicott Research Group, Inc. Made in USA
page 2. page 3.
Typical Performance Curves
Input Current vs . Input Voltage
Input Voltage (Vdc)
Input Current (Adc)
0.11
0.19
0.27
0.35
0.43
0.51
0.59
6 8 10 12 14 16
Input Power vs . Input Voltage
Input Voltage (Vdc)
Input Power (Watts)
0.75
2.25
3.75
5.25
6.75
8.25
9.75
6 8 10 12 14 16
Relative Brightness vs. Input Power
Input Power (Watts)
Relative Brightness
20%
40%
60%
80%
100%
120%
140%
0.75 2.75 4.75 6.75 8.75
Relative Frequency vs . Input Voltage
Input Voltage (Vdc)
Relative Frequency
-6.0%
0.0%
6.0%
12.0%
18.0%
24.0%
30.0%
36.0%
6 8 10 12 14 16
Disable Circuit 3.3 K
1.5 K
2N3906
2N3904
1 K
+Vin 5V
Control (pin 6)
Control
1N4148
sgnitaRmumixaMetulosbA
gnitaRlobmySeulaVstinU
egnaRegatloVtupnIniV5.31+ot3.0-cdV
erutarepmeTgnitarepOoT07+ot0
o
C
erutarepmeTegarotSgtsT58+ot04-
o
C
snoitidnoCgnitarepOdednemmoceR
gnitaRlobmySeulaVstinU
egatloVtupnIniV2.31ot6+cdV
scitsiretcarahClacirtcelE
52=aTdnacdstloV00.21=niVdetonesiwrehtosselnU
o
C
citsiretcarahClobmySniMpyTxaMstinU
tnerruCtupnIniI-75.046.0cdA
ycneuqerFgnitarepOoF429243zHK
egatloVtuptuOmuminiM)nim(tuoV0221--smrV
ycneiciffE η-88-%
ebutreptnerruCtuptuOtuoI-0.6- smram
egatloVtuptuO
ebuthcaegnirewoPnehW(
124D01QLprahSehtni
)yalpsid
tuoV-005- smrV
tnemeriuqeRtnerruCtupnI6niP--51- cdam
After tube has be allowed to warm-up for 5 minutes Specifications subject to change without notice.
External Disable Circuit shown on page 3.
