ats280 hall-effect smart fan driver (preliminary this datasheet contains new product information. analog technology reserves the rights to modify the product specification with out 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 atc
! 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 m a package: sip-5l less external component ! ordering information ats280x x x temp. grade packing blank: tube or bulk a : tape & reel i5: sip-5l package blank: + ? ! 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 (c t ). ! application circuit
( dc brush-less fan )
ats280 hall-effect smart fan driver (preliminary rev. a0 feb. 20, 2002 atc ! block diagrams
! pin assignments
symbol p/i/o pin # description vcc p 1 positive power supply ct i 2 timing cap. do o 3 driver output dob o 4 driver inverted output gnd p 5 ground
ats280 hall-effect smart fan driver (preliminary rev. a0 feb. 20, 2002 atc ! absolute maximum ratings (ta = 25 c) characteristic symbol rating unit internal zener-protected voltage vcb 56 v operating supply voltage v cc opr 28 v i o (ave) 400 output current i o (peak) 1000 m a power dissipation p d 700 m w operating temperature topr -20~85 c storage temperature tstg -55~150 c ! electrical characteristics (ta=25 c, v cc =12v, c t =1 f) characteristic symbol test condition min typ. max. unit v cc =5v output1 ?on? 10 15 20 quiescent current v cc =12v output1 ?on? 10 17 20 ma i o =0.2a, tj=25 c -0.51.0 i o =0.4a, tj=25 c -0.91.5 output saturation voltage do dob i o =0.8a, tj=25 c -1.02.0 v charge current i ct -1.6 - a continuous rotation - 0.62 - limiting voltage v ctl holding state - 0.84 - recovery voltage v ctr -1.5 - v on time t on c t =1 f -250 - ms automatic self-rotation recovery circuit duty ratio dr t off / t on 45 6 ! magnetic characteristics characteristic symbol ta=+25 c min max ta=0 to 70 min max units operate point ats280 bop 0 60 0 60 g release poin ats280 brp -60 0 -60 0 g hysteresis ats280 bhys 60 200 50 140 g
ats280 hall-effect smart fan driver (preliminary rev. a0 feb. 20, 2002 atc ! package information sip-5l unit: mm / [inch]
! location of sensing point 2.4mm 1.32mm (branded side) (front view) ! marking information 280 part number year: ( front view ) "02" = 2002 "01" = 2001 x x x x nth week: 01~52 id code
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