TPS61020, TPS61024, TPS61025
TPS61026, TPS61027, TPS61028
TPS61029
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SLVS451D–SEPTEMBER 2003–REVISED FEBRUARY 2006
TPS61020
L1
SW
VOUT
4.7 µH
D1
C2
VBAT
C1
10 µF
Input
0.9 V to 6.5 V
22 µF
EN
LBI
FB
C3
R1
10 nF
PS
LBO
PGND
GND
List of Components:
U1 = TPS61020DRC
L1 = Sumida CDRH2D16-4R7
C1, C2, C3 = X7R, X5R Ceramic
D1 = White LED
Figure 25. Power Supply Solution for Powering White LED's With LED Currents Below 150 mA in
Lighting Applications
TPS61020
L1
SW
VOUT
4.7 mH
D1
C2
VBAT
R1
C1
10 mF
Input
1.5 MW
22 mH
EN
1.8 V to 6.5 V
LBI
FB
C3
R2
PS
LBO
200 kW
2200 pF
PGND
GND
Q1
Flashlight
Control
List of Components:
U1 = TPS61020DRC
L1 = TDK VLF3010AT 4R7MR70
C1, C2, C3 = X7R, X5R Ceramic
D1 = OSRAM LWW57G
Q1 = Vishay SI1012R
Figure 26. Simple Power Supply Solution for Powering White LED Flashlights
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