MAX1979 datasheet(8/20 Pages) MAXIM

Part #	MAX1979

Description	Integrated Temperature Controllers for Peltier Modules

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Manufacturer	MAXIM [Maxim Integrated Products]

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Integrated Temperature

Controllers for Peltier Modules

8

_______________________________________________________________________________________

SWITCHING FREQUENCY CHANGE

vs. INPUT SUPPLY

VDD (V)

5.0

4.5

4.0

3.5

-30

-25

-20

-15

-10

-5

0

5

10

-35

3.0

5.5

REFERENCE VOLTAGE CHANGE

vs. INPUT SUPPLY

-2.5

-2.0

-1.5

-1.0

-0.5

0

0.5

1.0

-3.0

VDD (V)

5.0

4.5

4.0

3.5

3.0

5.5

REFERENCE VOLTAGE CHANGE

vs. TEMPERATURE

TEMPERATURE (

°C)

60

40

20

0

-20

-3

-2

-1

0

1

2

3

-4

-40

80

REFERENCE LOAD REGULATION

REFERENCE LOAD CURRENT (mA)

0.8

0.6

-0.2

0

0.2

0.4

-0.8

-0.6

-0.4

-0.2

0

0.2

0.4

0.6

-1.0

-0.4

1.0

SINK

SOURCE

ATO VOLTAGE

vs. THERMISTOR TEMPERATURE

THERMISTOR TEMPERATURE (

°C)

30

20

010

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

4.5

0

-10

40

50

60

NTC, 10k

Ω THERMISTOR

CIRCUIT IN FIGURES 1 AND 2

STARTUP AND SHUTDOWN WAVEFORMS

100

µs/div

VSHDN

5V/div

ITEC

500mA/div

IDD

200mA/div

CTLI STEP RESPONSE

1ms/div

1.5V

0A

VCTLI

1V/div

ITEC

1A/div

INPUT SUPPLY STEP RESPONSE

1A

0V

VDD

2V/div

ITEC

20mA/div

10ms/div

THERMAL STABILITY,

COOLING MODE

4s/div

TEMPERATURE

0.001

°C/div

ITEC = +25

°C

TA = +45

°C

Typical Operating Characteristics (continued)

(VDD = 5V, VCTLI = 1V, VFREQ = GND, RTEC = 1Ω, circuit of Figure 1, TA = +25°C, unless otherwise noted.)

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