MAX8520 MAXIM [Maxim Integrated Products], MAX8520 Datasheet - Page 6

• Manufacturer Part Number: MAX8520
• Description: Smallest TEC Power Drivers for Optical Modules
• Manufacturer: MAXIM [Maxim Integrated Products]

Smallest TEC Power Drivers for
Optical Modules
6
(V
DD
TEC CURRENT vs. CTLI VOLTAGE
_______________________________________________________________________________________
= 5V, circuit of Figure 1, T
OUTPUT VOLTAGE RIPPLE
DIFFERENTIAL
400ns/div
20ms/div
0.520
0.510
0.500
0.490
0.480
0.470
0.460
0.450
-40
FREQ = 1MHz
V
R
MAX8520/21 toc04
MAX8520/21 toc07
I
CTLI
TEC
TEC
-20
= 1Ω
= 2V
vs. AMBIENT TEMPERATURE
AMBIENT TEMPERATURE (°C)
A
0
= +25°C, unless otherwise noted)
0V
0A
C
V
1mV/div
AC-COUPLED
I
V
1V/div
I
1A/div
TEC
TEC
2
OS2
CTLI
= C
= 1A
- V
20
7
= 1µF
OS1
40
60
Typical Operating Characteristics (continued)
ZERO-CROSSING TEC CURRENT
80
V
DD
400ns/div
1ms/div
RIPPLE
MAX8520/21 toc08
MAX8520/21 toc05
1100
1000
1.5V
0A
V
I00mV/div
I
100mA/div
V
20mV/div
AC-COUPLED
I
TEC
900
800
700
600
500
400
TEC
CTLI
DD
= 1A
-40
FREQ = 1MHz
V
R
FREQ = 500kHz
CTLI
TEC
-20
= 1Ω
= 1.5V
SWITCHING FREQUENCY
3.0
2.5
2.0
1.5
1.0
0.5
0
vs. TEMPERATURE
-2.0
TEMPERATURE (°C)
0
-1.5
20
V
-1.0
TEC CURRENT RIPPLE
ITEC
40
TEC CURRENT (A)
-0.5
vs. TEC CURRENT
400ns/div
60
0
0.5
80
1.0
MAX8520/21 toc06
1.5
2.0
1.5A
10mA/div
AC-COUPLED
0A