MAX6620ATI+ by Analog Devices

Quad Linear Fan-Speed Controller


The MAX6620 controls the speeds of up to four fans using four independent linear voltage outputs. The drive voltages for the fans are controlled directly over the I²C interface. Each output drives the base of an external bipolar transistor or the gate of a FET in high-side drive configuration. Voltage feedback at the fan's power-supply terminal is used to force the correct output voltage. The MAX6620 offers two methods for fan control. In RPM mode, the MAX6620 monitors four fan tachometer logic outputs for precise (±1%) control of fan RPM and detection of fan failure. In DAC mode, each fan is driven with a voltage resolution of 9 bits and the tachometer outputs of the fans are monitored for failure. The DAC_START input selects the fan power-supply voltage at startup to ensure appropriate fan drive when power is first applied. A watchdog feature turns the fans fully on to protect the system if there are no valid I²C communications within a preset timeout period. The MAX6620 operates from a 3.0V to 5.5V power supply with low 250µA supply current, and the I²C-compatible interface makes it ideal for fan control in a wide range of cooling applications. The MAX6620 is available in a 28-pin TQFN package and operates over the -40°C to +125°C automotive temperature range.

Where to Buy

Prices starting from US$3.56

Distributor Stock
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RS
from US$4.39
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Analog Devices
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Newark Electronics
from US$5.28
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element14
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Farnell
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Features

Controls Up to Four Independent Fans with Linear (DC) Drive
Uses Four External Low-Cost Pass Transistors
1% Accuracy Precision RPM Control
Controlled Voltage Rate-Of-Change for Best Acoustics
I²C Bus Interface
3.0V to 5.5V Supply Voltage Range
250µA (typ) Operating Supply Current
3µA (typ) Shutdown Supply Current
Small 5mm x 5mm Footprint

Specifications

Fan Controller Functions Fan Failure Detector
Interface 2-Wire/I2C/SMBus
Fan Control Linear
Package/Pins TQFN/28
BudgetaryPrice (See Notes) 3.33


MAX6620ATI+ Semiconductors - ICs by Analog Devices

FAN CONTROLLER DC TQFN-28

Status: Unknown
Series: -
RoHS: Unknown
Download Datasheet Visit Manufacturer Site View Pricing & Stock

Specifications

Motor Type DC
No. of Outputs 4Outputs
Output Current -
Output Voltage -
Driver Case Style TQFN
No. of Pins 28Pins
Supply Voltage Min 3V
Supply Voltage Max 5.5V
Operating Temperature Min -40°C
Operating Temperature Max 125°C
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant To Be Advised
MSL MSL 1 - Unlimited
SVHC No SVHC (15-Jan-2018)

Alternative Descriptions

Quad Linear Fan-Speed Controll | Analog Devices
MAXIM,MAX6620ATI+ | RS
Fan Controller, Dc, Tqfn-28 | Newark Electronics
FAN CONTROLLER, DC, TQFN-28 | element14

Frequently Asked Questions

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Is the MAX6620ATI+ RoHS compliant?

This part has not been flagged as RoHS Compliant.

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Authorised distributors including Analog Devices, RS, Newark Electronics, element14 and Farnell have stock available or on a lead time for MAX6620ATI+ .

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