TEMPERATURE (

°C)

80

60

20

40

0

-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

Ω

TEC CURRENT (A)

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

500mA/div

1.5V

0A

100mV/div

TEC CURRENT vs. CTLI VOLTAGE

MAX1968 toc06

20ms/div

1A/div

0V

0A

1V/div

TEC CURRENT RIPPLE

MAX1968 toc05

400ns/div

2mA/div

DC CURRENT = 1A

MAX1968 toc04

200ns/div

100mV/div

AC-COUPLED

OUTPUT VOLTAGE RIPPLE

MAX1968 toc03

400ns/div

100mV/div

AC-COUPLED

100mV/div

AC-COUPLED

EFFICIENCY vs. TEC CURRENT

TEC CURRENT (A)

2

1

10

20

30

40

50

60

70

80

90

0

03

FREQ = 500kHz

Ω

EFFICIENCY vs. TEC CURRENT

TEC CURRENT (A)

2

1

10

20

30

40

50

60

70

80

90

0

03

FREQ = 500kHz

Ω

Power Drivers for Peltier TEC Modules

6

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Typical Operating Characteristics