Smallest TEC Power Drivers for
Optical Modules
Functional Diagram
ON
OFF
FREQ (MAX8521)
SHDN
REF
REF
3V TO
5.5V
V
DD
PV
DD
1
MAX V
=
TEC
× 4
MAXV
V
MAXV
OR V
DD
LX1
MAX I
=
TEC
MAXIP
MAXIN
(V
/V ) ×
SENSE
MAXIP REF
(0.15V/R
)
PWM CONTROL
PGND1
CS
AND
MAX I
=
TEC
GATE CONTROL
(V
/V ) ×
MAXIN REF
(0.15V/R
)
SENSE
R
SENSE
OS1
CS
OS2
ITEC
OS1
REF
PV
DD
2
V
DD
CTLI
LX2
COMP
GND
MAX8520/
MAX8521
FREQ
(MAX8520)
PGND2
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