Datasheet

13
LT1304/LT1304-3.3/LT1304-5
TYPICAL APPLICATIONS
U
Negative LCD Bias Generator
Electroluminescent Panel Driver with 200Hz Oscillator
V
IN
SW
GND
FB
22k
I
LIM
LT1304
+
+
1M
1%
**
**
**
110k
1%
90.9k
1%
VOLTAGE ADJUST
1kHz PWM INPUT
0V TO 5V
1.69M
1%
1µF
CERAMIC
47µF
3.3µF
10µF
35V
1000pF
2 CELLS
L1*
10µH
–V
OUT

–14V TO –22V
1mA TO 10mA
* SUMIDA CD43-100
** MOTOROLA MBR0530
1304 TA14
+
EFFICIENCY = 70% TO 75%
AT I
LOAD
≥ 2mA
DANGER! HIGH VOLTAGE
V
IN
SW
GND
200Hz
NC
FB
3.3k
I
LIM
LBI
LBO
34
16
LT1304
51k
22k
22k
22k
1/2 BAW56
FMMT458
MBR0530
50k
INTENSITY
ADJUST
10M
(3.3M × 3)
1µF
200V
MUR160
600V
1nF
0.01µF
47µF
EL PANEL
C
PANEL
≤ 20nF
1:12*
* DALE LPE3325-A205 TRANSFORMER MEASURES 6.5mm × 8.2mm × 5.2mm (H)
[phone]
1304 TA15
SHDN
22k
22k
V
IN

2V TO 7V
5V = OPERATE
0V = SHUTDOWN
2N3906
75k
1/2 BAW56
+