Datasheet

MAX8520/MAX8521
Smallest TEC Power Drivers for Optical
Modules
12 ______________________________________________________________________________________
V
DD
R
SENSE
0.09Ω
C2
1µF
C5
10µF
L2
4.7µH
R2
REF
LX1
V
DD
L1
4.7µH
CS
OS1
OS2
PVDD1
C1
1µF
C3
1µF
C4
1µF
C6
0.1µF
49.9kΩ
100kΩ
PGND1
PGND2
REF
MAXIP
MAXIN
MAXV
PVDD2
MAX8520
LX2
COMP
FREQ
ITEC
ON
OFF
SHDN
CTLI GND
0.022µF
10µF
243kΩ
1kΩ
10µF
50kΩ
0.01µF
REF
DAC
INPUTS
V
DD
C7
1µF
C8
0.1µF
R
EXT
60kΩ
R
THER
MAX5144
U1
MAX4238
U2
U4
Figure 2. Typical Application Circuit for the MAX8520 with Reduced Op-Amp Count Configuration