Datasheet

I
TEC
vs. TEMPERATURE
MAX1968 toc09
TEMPERATURE (°C)
TEC CURRENT (A)
806020 400-20
0.996
0.998
1.000
1.002
1.004
1.006
1.008
1.010
1.012
1.014
0.994
-40
FREQ = 500kHz
V
CTLI
= 1.9V
R
TEC
= 1Ω
V
ITEC
vs. TEC CURRENT
MAX1968 toc08
TEC CURRENT (A)
V
ITEC
(V)
1 -1
0.5
1.0
1.5
2.0
2.5
3.0
0
-3 3
ZERO-CROSSING TEC CURRENT
vs. CTLI VOLTAGE
MAX1968 toc07
1ms/div
I
TEC
500mA/div
1.5V
0A
V
CTLI
100mV/div
TEC CURRENT vs. CTLI VOLTAGE
MAX1968 toc06
20ms/div
I
TEC
1A/div
0V
0A
V
CTLI
1V/div
TEC CURRENT RIPPLE
MAX1968 toc05
400ns/div
I
TEC
2mA/div
DC CURRENT = 1A
V
DD
RIPPLE
MAX1968 toc04
200ns/div
V
DD
100mV/div
AC-COUPLED
OUTPUT VOLTAGE RIPPLE
MAX1968 toc03
400ns/div
V
OS2
100mV/div
AC-COUPLED
V
OS1
100mV/div
AC-COUPLED
EFFICIENCY vs. TEC CURRENT
V
DD
= 3.3V
MAX1968 toc02
TEC CURRENT (A)
EFFICIENCY (%)
21
10
20
30
40
50
60
70
80
90
0
03
FREQ = 500kHz
R
LOAD
= 0.85Ω
EFFICIENCY vs. TEC CURRENT
V
DD
= 5V
MAX1968 toc01
TEC CURRENT (A)
EFFICIENCY (%)
21
10
20
30
40
50
60
70
80
90
0
03
FREQ = 500kHz
R
LOAD
= 1Ω
MAX1968/MAX1969
Power Drivers for Peltier TEC Modules
6 _______________________________________________________________________________________
Typical Operating Characteristics
(V
DD
= 5V, V
CTLI
= 1V, V
FREQ
= GND, R
LOAD
= 1Ω, circuit of Figure 1, T
A
= +25°C, unless otherwise noted.)