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Fabricante

ATS280I5

Hall-Effect Smart Fan Driver

Analog Technology Inc 

ATS280

Hall-Effect Smart Fan Driver

ATC

 

(Preliminary

! Features

 On chip Hall plate

 Build in Zener protection for output driver

 Build in protection diode for power

reverse connecting

 Rotor-locked detection

 Automatically restart after release of

motor Locking

 Adjustable auto restart time

 Operating voltage: 3~28 V

 Output current: 
= 400 mA

 Package: SIP-5L

 Less external component

! Ordering Information

ATS280X X X

Packing

Blank: Tube or Bulk

A : Tape & Reel

Package I5: SIP-5L

! General Descriptions

ATS280 is the integrated Hall sensor

owned two complementary outputs for

motor’s coil driving, auto locked shutdown

and auto restart functions. Functional block

diagram includes that a regulator with

temperature-compensated band-gap, an

on-chip Hall voltage generator, a

comparator, a Schmitt trigger and two

current output drivers. The regulator can

provide wide operational voltage range.

The Hall voltage generator is to amplify the

Hall voltage due to Hall effect. A Schmitt

trigger is to provide switching Hysteresis for

noise rejection. To avoid coil burning,

rotor-lock detection circuit will shutdown the

output driver if detect rotor-lock status. A

rotation recovery circuit is to restart the

motor after rotor-lock is removed. In

addition, the auto re-start time is flexible by

adjusting the capacitance (CT).

Temp. grade Blank: − 

 +

! Application Circuit

 










 

( DC Brush-less Fan )

This datasheet contains new product information. Analog Technology reserves the rights to modify the product specification without notice. No liability is assumed as a result of the

use of this product. No rights under any patent accompany the sale of the product.

Rev. A0 Feb.20, 2002



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