Datasheet
SLUS446B – MAY 2000 – REVISED DECEMBER 2000
17
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
APPLICATION INFORMATION
design example: forced constant-frequency mode switching converter, two li-ion cell input, 3.0-V
output
Figure 10 shows the schematic of a forced constant-frequency mode switching converter based upon the
TPS62102. The output current for this design can range from 200 mA to 500 mA.
UDG–000130
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
R4
15 k
Ω
C2
680 pF
L1
4.7
µ
H
10
µ
F
MLC
R3
36 k
Ω
OUT 3.3 V
200 mA TO 500 mA
TPS62102
5.0 V TO 8.5 V DC
R2
113 k
Ω
C3
100 pF
R1
1 k
Ω
D1
10BQ040
C4
†
Optional
Figure 10. Forced Constant-Frequency Mode Application Circuit