LT1930 데이터 시트보기 (PDF) - Linear Technology
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LT1930 Datasheet PDF : 12 Pages
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LT1930/LT1930A
TYPICAL APPLICATIO S
9V, 18V, –9V Triple Output TFT-LCD Bias Supply with Soft-Start
D1 D2
C3
0.1µF
L1
VIN
4.7µH
D5
3.3V
5
1
+
C1
VIN
SW
2.2µF
VSS
RSS
LT1930
30k 4
3
SHDN
FB
3.3V
0V
DSS
1N4148
GND
2
CSS
68nF
C2
0.1µF
C1: X5R OR X7R, 6.3V
C2,C3, C5: X5R OR X7R, 10V
D4
C4: X5R OR X7R, 25V
D1- D4: BAT54S OR EQUIVALENT
D5: MBR0520 OR EQUIVALENT
D3
L1: PANASONIC ELT5KT4R7M
18V
10mA
C4
1µF
9V
200mA
R1
124k
C5
10µF
R2
20k
C6
1µF
–9V
10mA 1930/A TA11a
9V OUTPUT
5V/DIV
–9V OUTPUT
5V/DIV
18V OUTPUT
10V/DIV
IL1 0.5A/DIV
Start-Up Waveforms
2ms/DIV
8V, 23V, –8V Triple Output TFT-LCD Bias Supply with Soft-Start
D1 D2
D3 D4
C3
C4
C5
C6
0.1µF
0.1µF
0.1µF
1µF
L1
VIN
4.7µH
3.3V
5
1
+
C1
VIN
SW
2.2µF
VSS
RSS
LT1930
30k 4
3
SHDN
FB
3.3V
0V
DSS
1N4148
GND
2
CSS
68nF
C1: X5R OR X7R, 6.3V
C2-C4, C7, C8: X5R OR X7R, 10V
C5: X5R OR X7R, 16V
C6: X5R OR X7R, 25V
D1- D6: BAT54S OR EQUIVALENT
D7: MBR0520 OR EQUIVALENT
L1: PANASONIC ELT5KT4R7M
D7
C2
0.1µF
D5
D6
8V
220mA
R1
113k
C7
10µF
R2
21k
C8
1µF
–8V
10mA
23V
10mA
1930/A TA12a
8V OUTPUT
5V/DIV
–8V OUTPUT
5V/DIV
23V OUTPUT
10V/DIV
IL1 0.5A/DIV
Start-Up Waveforms
2ms/DIV
10
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