TPS61040
TPS61041
SLVS413 – FEBRUARY 2002
APPLICATION INFORMATION
R3
200 kΩ
BC857C
R1
L1
10 µH
D1
V
V
IN
1.8 V to 6 V
OUT
18 V / 10 mA
TPS61040
C
FF
22 pF
2.2 MΩ
V
SW
FB
IN
C2
1 µF
C3
0.1 µF
(Optional)
C1
4.7 µF
R2
160 kΩ
EN
GND
L1:
D1:
C1:
C2:
Sumida CR32-100
Motorola MBR0530
Tayo Yuden JMK212BY475MG
Tayo Yuden TMK316BJ105KL
Figure 18. LCD Bias Supply With Load Disconnect
D3
V2 = –10 V/15 mA
D2
C4
4.7 µF
C3
1 µF
L1
D1
6.8 µH
V1 = 10 V/15 mA
TPS61040
C
FF
22 pF
R1
1.5 MΩ
V
IN
SW
FB
V
IN
= 2.7 V to 5 V
C2
1 µF
C1
4.7 µF
L1:
Murata LQH4C6R8M04
D1, D2, D3: Motorola MBR0530
C1:
C2, C3, C4: Tayo Yuden EMK316BJ105KF
EN
GND
R2
210 kΩ
Tayo Yuden JMK212BY475MG
Figure 19. Positive and Negative Output LCD Bias Supply
16
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