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MAX1978

Integrated Temperature Controllers for Peltier Modules

Maxim Integrated 

Integrated Temperature

Controllers for Peltier Modules

ELECTRICAL CHARACTERISTICS

(VDD = PVDD1 = PVDD2 = SHDN = 5V, FREQ = GND, CTLI = FB+ = FB- = MAXV = MAXIP = MAXIN = REF, TA = -40°C to +85°C,

unless otherwise noted.) (Note 5)

PARAMETER

Input Supply Range

SYMBOL

VDD

CONDITIONS

VDD = 5V, ITEC = 0 to ±3A,

VOUT = VOS1 -VOS2 (MAX1978)

MIN

MAX UNITS

3

5.5

V

-4.3

+4.3

Output Voltage Range

VOUT

VDD = 5V, ITEC = 0 to 6A,

VOUT = VOS1 (MAX1979)

VDD = 3V, ITEC = 0 to ±3A,

VOUT = VOS1 - VOS2 (MAX1978)

4.3

V

-2.3

+2.3

Maximum TEC Current

Reference Voltage

Reference Load Regulation

Current-Sense Threshold

No-Load Supply Current

Shutdown Supply Current

UVLO Threshold

Switching Frequency Internal

Oscillator

OS1, OS2, CS Input Current

VDD = 3V, ITEC = 0 to 6A,

VOUT = VOS1 (MAX1979)

MAX1978

ITEC(MAX)

MAX1979

VREF VDD = 3V to 5.5V, IREF = 150µA

∆VREF

VDD = 3V to 5.5V,

IREF = 10µA to -1mA

VOS1 < VCS

VOS1 > VCS

VMAXI_ = VREF

VMAXI_ = VREF/3

VMAXI_ = VREF

VMAXI_ = VREF/3

IDD(NO

LOAD)

IDD-SD

VDD = 5V

VDD = 3.3V

SHDN = GND, VDD = 5V (Note 3)

VUVLO

VDD rising

VDD falling

fSW-INT

FREQ = GND

FREQ = VDD

IOS1, IOS2,

ICS

0 or VDD

1.475

135

40

135

40

2.4

2.25

450

800

-100

2.3

±3

A

6

1.515

V

5

mV

160

60

mV

160

60

50

mA

30

3

mA

2.8

V

2.75

650

kHz

1200

+100

µA

SHDN, FREQ Input Current

I SHDN,

I FREQ

0 or VDD

-5

+5

µA

SHDN, FREQ Input Low Voltage

VIL

VDD = 3V to 5.5V

0.25 ✕

V

VDD

SHDN, FREQ Input High Voltage

VIH

VDD = 3V to 5.5V

0.75 ✕

V

VDD

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