Datasheet

LT1947
9
1947fa
TYPICAL APPLICATIO S
U
D2
L1
3.3µH
L2
4.7µH
D1
D3
BAT54S
D4
R3
182k
R1
69.8k
C2
3.3µF
CERAMIC
×2
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
C4
0.68µF
C6
220nF
AV
DD
10V
150mA
V
ON
24V
10mA
V
OFF
–6V
10mA
R2
10k
1947 TA04
R4
10k
C5
10nF
C3
220nF
C1
2.2µF
CERAMIC
V
IN
3.3V
SHUTDOWN
D1: MBRM120
D2: CMDSH-3
L1: SUMIDA CLQ4DI03R3
L2: TAIYO YUDEN LB2012B-4R7M
SW2
V
IN
SW1
SHDN
C
T
LT1947
GND
V
O2
FB1
V
ON
FB2
TFT-LCD Bias Generator: 10V, 24V, –6V Output
D2
L1
4.7µH
L2
4.7µH
D1
D3 D4
BAT54S
R3
147k
R1
86.6k
C2
3.3µF
CERAMIC
×2
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
C4
34k
34k
Q2
Q1
C6
AV
DD
12V
120mA
V
ON
20V
10mA
V
OFF
–6V
20mA
R2
10k
1947 TA02
R4
10k
C5
10nF
C3
0.22µF
C1
4.7µF
V
IN
3.3V
SHUTDOWN
D1: MBRM120
D2: CMDSH-3
L1: SUMIDA CLQ4DI04R7
L2: TAIYO YUDEN LB2012B4R7M
Q1: MMBT3904 NPN
Q2: MMBT3906 PNP
SW2
V
IN
SW1
SHDN
C
T
LT1947
GND
V
O2
FB1
V
ON
FB2
TFT-LCD Bias Generator: 12V, 20V, –6V Output