Datasheet

MAX8520/MAX8521
Smallest TEC Power Drivers for Optical
Modules
______________________________________________________________________________________ 11
V
DD
R
SENSE
0.09Ω
C2
1µF
C5
10µF
L2
4.7µH
R2
REF
R
THER
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
MAX8521
LX2
COMP
FREQ
ITEC
ON
OFF
SHDN
CTLI GND
0.022µF
10µF
243kΩ
10kΩ
1µF
510kΩ
100kΩ
10kΩ
TO
REF
DAC
INPUTS
V
DD
V
DD
C7
1µF
C8
0.1µF
MAX4477
MAX4477
MAX4475
MAX5144
U1
U2
U4
U3A
U3B
Figure 1. MAX8521 Typical Application Circuit