LT1947 データシートの表示（PDF） - Linear Technology
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LT1947 Datasheet PDF : 12 Pages
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TYPICAL APPLICATIO S
TFT-LCD Bias Generator: 12V, 20V, – 6V Output
BAT54S
D3
D4
34k VOFF
Q1
–6V
Q2 20mA
34k
VIN
3.3V
C1
4.7µF
SHUTDOWN
L1
C6
4.7µH
L2
4.7µH
VIN
SW2
D1
SW1
FB1
D2
C3
0.22µF
R3
147k
R4
10k
VO2 LT1947
FB2
VON
SHDN CT GND
C5
10nF
R1
86.6k
R2
10k
C4
AVDD
12V
120mA
C2
3.3µF
CERAMIC
×2
VON
20V
10mA
C1: TAIYO YUDEN JMK316BJ475MD
4.7µF 6.3V X7R
C2: TAIYO YUDEN LMK325BJ335MD
3.3µF 10V X7R ×2
C3: AVX 0.22µF 25V X7R
C4, C6: TAIYO YUDEN LMK107BJ684MA
0.68µF 10V X7R
D1: MBRM120
D2: CMDSH-3
1947 TA02
L1: SUMIDA CLQ4DI04R7
L2: TAIYO YUDEN LB2012B4R7M
Q1: MMBT3904 NPN
Q2: MMBT3906 PNP
TFT-LCD Bias Generator: 10V, 24V, – 6V Output
BAT54S
D3
D4
VIN
3.3V
C1
2.2µF
CERAMIC
SHUTDOWN
L1
3.3µH
C6
220nF
L2
4.7µH
VIN
SW2
D1
SW1
FB1
D2
C3
220nF
R3
182k
R4
10k
VO2 LT1947
FB2
VON
SHDN CT GND
C5
10nF
R1
69.8k
R2
10k
VOFF
–6V
10mA
C4
0.68µF
AVDD
10V
150mA
C2
3.3µF
CERAMIC
×2
VON
24V
10mA
C1: TAIYO YUDEN LMK316BJ225MD 2.2µF X7R
C2: TAIYO YUDEN LMK325BJ335MD 3.3µF X5R
C3, C6: AVX 0.22µF CERAMIC X7R
C4: TAIYO YUDEN EMK212BJ684MD
D1: MBRM120
1947 TA04
D2: CMDSH-3
L1: SUMIDA CLQ4DI03R3
L2: TAIYO YUDEN LB2012B-4R7M
LT1947
1947fa
9
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