TPS61040
TPS61041
www.ti.com
SLVS413C–OCTOBER 2002–REVISED AUGUST 2007
L1
10 µH
D1
V
18 V
OUT
V
IN
1.8 V to 6 V
TPS61040
C
22 pF
FF
R1
2.2 MW
V
IN
SW
FB
C2
1 µF
C1
4.7 µF
L1:
D1:
C1:
C2:
Sumida CR32-100
Motorola MBR0530
Tayo Yuden JMK212BY475MG
Tayo Yuden TMK316BJ105KL
EN
GND
R2
160 kW
Figure 16. LCD Bias Supply
L1
10 µH
D1
V
O
18 V
TPS61040
C
FF
R1
2.2 MW
22 pF
V
V
IN
SW
FB
IN
C2
1 µF
1.8 V to 6 V
C1
4.7 µF
DAC or Analog Voltage
0 V = 25 V
1.233 V = 18 V
EN
GND
R2
160 kW
L1:
Sumida CR32-100
D1:
C1:
C2:
Motorola MBR0530
Tayo Yuden JMK212BY475MG
Tayo Yuden GMK316BJ105KL
Figure 17. LCD Bias Supply With Adjustable Output Voltage
R3
200 kW
BC857C
L1
10 µH
D1
V
IN
V
OUT
1.8 V to 6 V
18 V / 10 mA
TPS61040
R1
C
FF
2.2 MW
22 pF
V
IN
SW
FB
C2
1 µF
C3
0.1 µF
(Optional)
C1
4.7 µF
R2
160 kW
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
14
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