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MAX1968_07 Datasheet, PDF (6/16 Pages) Maxim Integrated Products – Power Drivers for Peltier TEC Modules
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Power Drivers for Peltier TEC Modules
Typical Operating Characteristics
(VDD = 5V, VCTLI = 1V, VFREQ = GND, RLOAD = 1Ω, circuit of Figure 1, TA = +25°C, unless otherwise noted.)
EFFICIENCY vs. TEC CURRENT
VDD = 5V
90
FREQ = 500kHz
80
70
60
50
40
30
20
RLOAD = 1Ω
10
0
0
1
2
3
TEC CURRENT (A)
90
80
70
60
50
40
30
20
10
0
0
EFFICIENCY vs. TEC CURRENT
VDD = 3.3V
FREQ = 500kHz
RLOAD = 0.85Ω
1
2
TEC CURRENT (A)
VOS2
100mV/div
AC-COUPLED
VOS1
100mV/div
AC-COUPLED
3
OUTPUT VOLTAGE RIPPLE
MAX1968 toc03
400ns/div
VDD
100mV/div
AC-COUPLED
VDD RIPPLE
MAX1968 toc04
ITEC
2mA/div
TEC CURRENT RIPPLE
MAX1968 toc05
VCTLI
1V/div
TEC CURRENT vs. CTLI VOLTAGE
MAX1968 toc06
0V
ITEC
0A
1A/div
200ns/div
DC CURRENT = 1A
400ns/div
20ms/div
VCTLI
100mV/div
ZERO-CROSSING TEC CURRENT
vs. CTLI VOLTAGE
MAX1968 toc07
3.0
2.5
1.5V
2.0
VITEC vs. TEC CURRENT
ITEC
500mA/div
1.5
0A
1.0
0.5
1ms/div
0
-3
-1
1
3
TEC CURRENT (A)
ITEC vs. TEMPERATURE
1.014
1.012
1.010
1.008
1.006
1.004
1.002
1.000
0.998 FREQ = 500kHz
0.996
VCTLI = 1.9V
RTEC = 1Ω
0.994
-40 -20 0 20 40 60 80
TEMPERATURE (°C)
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