Power Drivers for Peltier TEC Modules

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13

OS2

OS1

CS

LX1

LX2

COMP

ITEC

GND

CTL1

50m

Ω

100k

Ω

50k

Ω

100k

Ω

100k

Ω

1

µF

1

µF

1

µF

1

µF

1

µF

1

µF

PGND1

PGND2

REF

MAXIP

FREQ

MAXIN

MAXV

MAX1968

3V TO

5.5V

TO REF

0.01

µF

10k

Ω

3.3

µH

SHDN

3.3

µH

10

µF

ON

OFF

U3A

U3B

510k

Ω

100k

Ω

10k

Ω

U2

TO REF

10

µF

0.022

µF

240k

Ω

10k

Ω

TEMPERATURE

SET POINT*

*SEE FIGURE 2

FOR TEMPERATURE

SET POINT SET BY A DAC

0.1

µF

0.1

µF

10k

Ω

1

µF

MAX4477

MAX4477

MAX4475

Figure 1. Typical Application Circuit for MAX1968