Datasheet

MAX8520/MAX8521
Smallest TEC Power Drivers for Optical
Modules
______________________________________________________________________________________ 17
GND
FREQ
(MAX8520)
COMP
CTLI
ITEC
MAXIP
FREQ (MAX8521)
PWM CONTROL
AND
GATE CONTROL
MAXIN
R
SENSE
PGND1
PGND2
MAXV
REF
SHDN
REF
OS1
OS2
CS
LX1
LX2
ON
OFF
3V TO
5.5V
OS1
REF
CS
MAX V
TEC
=
V
MAXV
× 4
OR V
DD
MAX I
TEC
=
(V
MAXIP
/V
REF
) ×
(0.15V/R
SENSE
)
MAX I
TEC
=
(V
MAXIN
/V
REF
) ×
(0.15V/R
SENSE
)
PVDD1
PVDD2
V
DD
V
DD
MAX8521/
MAX8520
Functional Diagram