TPS61020 Datasheet, PDF (18/22 Pages) Texas Instruments – 96% EFFICIENT SYNCHRONOUS BOOST CONVERTER WITH 1.5-A SWITCH

TPS61020, TPS61024
TPS61025, TPS61027
SLVS451A – SEPTEMBER 2003 – REVISED APRIL 2004
Input
0.9 V to 6.5 V
TPS61020
L1
SW
VOUT
4.7 µH
C2
D1
C1
VBAT
22 µF
EN
10 µF
LBI
FB
C3
PS
LBO
R1
10 nF
GND
PGND
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List of Components:
U1 = TPS61020DRC
L1 = Sumida CDRH2D16-4R7
C1, C2, C3 = X7R, X5R Ceramic
D1 = White LED
Figure 24. Power Supply Solution for Powering White LED´s in Lighting Applications
Input
1.8 V to 6.5 V
L1
TPS61020
4.7 µH
C1
10 µF
SW
VBAT
EN
LBI
VOUT
FB
C2
R1
D1
22 µF 1.5 MΩ
PS
GND
C3
LBO
22 µF
R2
200 kΩ
PGND
Flashlight
Q1
Comtrol
List of Components:
U1 = TPS61020DRC
L1 = TDK VLF3010AT 4R7MR70
C1, C2, C3 = X7R, X5R Ceramic
D1 = OSRAM LWW57G
Q1 = Vishay SI1012R
Figure 25. Simple Power Supply Solution for Powering White LED Flashlights
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