Diodes AH2984 Manuel d'utilisateur télécharger pdf

AH2984

Document number: DS31698 Rev. 4 - 2

1 of 10

www.diodes.com

December 2013

H2984

TWO PHASE HALL-EFFECT SMART FAN MOTOR CONTROLLER

Description

The AH2984 is a single-chip solution for driving two-coil brushless

direct current (BLDC) fans and motors. The device includes a Hall-

effect sensor, dynamic offset correction and two complementary

open-drain output drivers with internal Zener diode protection. It is

optimized for low start-up voltage.

To help protect the motor coils, the AH2984 provides Rotor Lock

Protection which shuts down output drives if rotor lock is detected.

The device automatically re-starts when the rotor lock is removed.

Over temperature shutdown provides thermal protection for the

device.

The AH2984 is available in SIP4 and SOT89-5 packages.

Features

• Single-chip solution

• Operating Voltage: 2.5V to 15V

• Built-in Hall sensor and input amplifier

• Rotor Lock Protection (Lock detection, output shutdown and

automatic re-start)

• Built-in reverse voltage protection diode

• Built-in Zener protection for output drivers

• Average output current up to 500mA

• Packages: SIP-4 and SOT89-5

• “Green” Molding Compound

• Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)

• Halogen and Antimony Free. “Green” Device (Note 3)

Pin Assignments

Applications

• Two-coil BLDC Cooling Fans

• Low Voltage/ Low Power BLDC Motors

Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.

2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"

and Lead-free.

3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and

<1000ppm antimony compounds.

3 7

DOBDO

GND

Vdd

AH2984

(Top View)

GND

AH2984

1 2 4 3

1 : V

2 : DO

3 : DOB

4 : GND

(Top View)

SIP- 4

SOT89-5

1 2 3 4 5 6 7 8 9 10

Résumé du contenu

AH2984 Document number: DS31698 Rev. 4 - 2 1 of 10 www.diodes.com December 2013© Diodes Incorporated AH2984TWO PHASE HALL-EFFECT SMART FAN MOTOR CO

Page 2 - Vdd DOGND

AH2984 Document number: DS31698 Rev. 4 - 2 10 of 10 www.diodes.com December 2013© Diodes Incorporated AH2984 IMPORTANT NOTICE DIODES INCORPORATED

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AH2984 Document number: DS31698 Rev. 4 - 2 2 of 10 www.diodes.com December 2013© Diodes Incorporated AH2984 Typical Applications Circuit (Note 4)

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AH2984 Document number: DS31698 Rev. 4 - 2 3 of 10 www.diodes.com December 2013© Diodes Incorporated AH2984 Functional Block Diagram (1) For SI

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AH2984 Document number: DS31698 Rev. 4 - 2 4 of 10 www.diodes.com December 2013© Diodes Incorporated AH2984 Absolute Maximum Ratings (@TA = +25°C,

Page 6 - Power Dissipation Curve

AH2984 Document number: DS31698 Rev. 4 - 2 5 of 10 www.diodes.com December 2013© Diodes Incorporated AH2984 Magnetic Characteristics (TA = +25C, V

Page 7 - 52 and 53 week

AH2984 Document number: DS31698 Rev. 4 - 2 6 of 10 www.diodes.com December 2013© Diodes Incorporated AH2984 Performance Characteristics (1) SIP-4

Page 8 - (1) Package type: SIP-4L

AH2984 Document number: DS31698 Rev. 4 - 2 7 of 10 www.diodes.com December 2013© Diodes Incorporated AH2984 Ordering Information (Note 9) AH2984

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AH2984 Document number: DS31698 Rev. 4 - 2 8 of 10 www.diodes.com December 2013© Diodes Incorporated AH2984 Package Outline Dimensions (All dimens

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