Datasheet
SLUS446B – MAY 2000 – REVISED DECEMBER 2000
19
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
design example: forced variable-frequency mode switching converter, two li-ion cell input, 3.0-V
output
Figure 13 shows the schematic of a forced variable-frequency mode switching converter based upon the
TPS62102. The output current for this design can range from 0 mA to 100 mA.
UDG–00057
1
3
2
4
VIN
SD/SYNC
C1
1.0
µ
F
MODE
AGND
8
6
7
5
SW
PGND
FB
COMP
+
+
LI ION
LI ION
R1
100 k
Ω
L1 22
µ
H
C2
10
µ
F
MLC
R2
36 k
Ω
OUT 3.0 V
TO
100 mA
TPS62102
10BQ040
NC
†
D1
0 mA
†
Optional
Figure 13. Forced Variable-Frequency Mode Application Circuit
design example: automatic mode switching converter, single li-ion cell input, 1.8-V output
Figure 14 shows the schematic of an automatic-mode switching converter based upon the TPS62102. The
output current for this design can range from 0 mA to 500 mA.
UDG–00140
1
3
2
4
VIN
SD/SYNC
C1
1.0
µ
F
MODE
AGND
8
6
7
5
SW
PGND
FB
COMP
LI–ION
R2
Ω
L1
15
µ
H
20
µ
F
MLC
80 k
Ω
OUT 1.8 V
TPS62102
R4
27 k
Ω
C2
2.2 nF
10BQ040
R1
1 k
Ω
C3
150 pF
+
†
D1
2.5 V TO 4.25 Vdc
100 k
C4
R3
0 mA TO 500 mA
†
Optional
Figure 14. 1.8-V Output Automatic-Mode Switching Converter Application Circuit