MAX1978-MAX1979 datasheet(5/20 Pages) MAXIM

Part #	MAX1978-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

_______________________________________________________________________________________

5

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

SYMBOL

CONDITIONS

MIN

MAX

UNITS

Input Supply Range

VDD

3

5.5

V

VDD = 5V, ITEC = 0 to ±3A,

VOUT = VOS1 -VOS2 (MAX1978)

-4.3

+4.3

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

VOUT = VOS1 (MAX1979)

4.3

VDD = 3V, ITEC = 0 to ±3A,

VOUT = VOS1 - VOS2 (MAX1978)

-2.3

+2.3

Output Voltage Range

VOUT

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

VOUT = VOS1 (MAX1979)

2.3

V

MAX1978

±3

Maximum TEC Current

ITEC(MAX)

MAX1979

6

A

Reference Voltage

VREF

VDD = 3V to 5.5V, IREF = 150µA

1.475

1.515

V

Reference Load Regulation

∆VREF

VDD = 3V to 5.5V,

IREF = 10µA to -1mA

5mV

VMAXI_ = VREF

135

160

VOS1 < VCS

VMAXI_ = VREF/3

40

60

VMAXI_ = VREF

135

160

Current-Sense Threshold

VOS1 > VCS

VMAXI_ = VREF/3

40

60

mV

VDD = 5V

50

No-Load Supply Current

IDD(NO

LOAD)

VDD = 3.3V

30

mA

Shutdown Supply Current

IDD-SD

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

3

mA

VDD rising

2.4

2.8

UVLO Threshold

VUVLO

VDD falling

2.25

2.75

V

FREQ = GND

450

650

Switching Frequency Internal

Oscillator

fSW-INT

FREQ = VDD

800

1200

kHz

OS1, OS2, CS Input Current

IOS1, IOS2,

ICS

0 or VDD

-100

+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 ✕

VDD

V

SHDN, FREQ Input High Voltage

VIH

VDD = 3V to 5.5V

0.75 ✕

VDD

V

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