cystech electronics corp. spec. no. : c499a4 issued date : 2007.09.26 revised date : page no. : 1/6 CSH277A4 complementary output hall effe ct latched sink driver ic description the CSH277A4 is an integrated hall sensors with output drivers designed for electronic commutation of brushless dc motor applications. the device includes an on-chip hall voltage generator for magnetic sensing, a comparator that amplifies the hall voltage, and a schmitt trigger to provide switching hysteresis for noise rejection, and complementary open collector drivers for sinking large curre nt loads. an internal bandgap regulator is used to provide temperature compensated supply voltage for intern al circuits and allows a wide operating supply range. if a magnetic flux density larger than threshold bop, do is turned on (low) and dob is turned off (high). the output state is held until a magnetic flux density reversal falls below brp causing do to be turned off and dob turned on. CSH277A4 is rated for operation over temperature range from -20 to 85 and voltage range from 3.5v to 20v. the devices are available in low cost di e forms or rugged 4 pin sip packages. features ? on-chip hall sensor ic with two different sensitivity and hysteresis settings ? internal bandgap regulator allows temperature compen sated operations and a wide operating voltage range ? high output sinking capability up to 400ma for driving large load ? lower current change rate reduces th e peak output voltage during switching ? build in protection diode for chip reverse power connecting ? package: sip-4l applications ? brushless dc motor ? brushless dc fan ? revolution counting ? speed measurement functional block diagrams CSH277A4 cystek product specification
cystech electronics corp. spec. no. : c499a4 issued date : 2007.09.26 revised date : page no. : 2/6 CSH277A4 cystek product specification
cystech electronics corp. spec. no. : c499a4 issued date : 2007.09.26 revised date : page no. : 3/6 CSH277A4 cystek product specification
cystech electronics corp. spec. no. : c499a4 issued date : 2007.09.26 revised date : page no. : 4/6 CSH277A4 cystek product specification
cystech electronics corp. spec. no. : c499a4 issued date : 2007.09.26 revised date : page no. : 5/6 CSH277A4 cystek product specification
cystech electronics corp. spec. no. : c499a4 issued date : 2007.09.26 revised date : page no. : 6/6 CSH277A4 cystek product specification sip-4l dimension inches millimeters inches millimeters marking: device name date code: year+month year: 2006 6 2007 7, ?, etc month : jan a, feb b, mar c, apr d,may e, jun f,jul g, a u g h, sep j,oct k nov l, dec m lot code: 01~99 serially 4-lead sip-4l plastic package cystek packa g e code: a 4 style: pin 1.vcc 2.output 3.output 4. ground dim min. max. min. max. dim min. max. min. max. a 0.051 0.071 1.295 1.803 d 0. 201 0.211 5.105 5.359 a1 0.024 - 0.610 - e 0.139 0.149 3.531 3.785 b 0.013 0.017 0.330 0.432 l 0.551 0.630 14.00 16.00 b1 0.016 0.020 0.406 0.508 e 0.05 ref 1.27 ref notes: 1.dimension and tolerance based on our spec. dated apr. 18,2002. 2.controlling dimension: millimeters. 3.maximum lead thickness includes lead finish thickness, and minimum lead thickness is the minimum thickness of base material. 4.if there is any question with packing specification or packing method, please c ontact your local cystek sales office. material: ? mold compound: epoxy resin family, flammability solid burning class: ul94v-0 important notice: ? all rights are reserved. reproduction in whole or in part is prohibited without the prior written approval of cystek. ? cystek reserves the right to make changes to its products without notice. ? cystek semiconductor products are not warranted to be suitable for use in life-support applications, or systems. ? cystek assumes no liability for any consequence of customer pr oduct design, infringement of pat ents, or application assistance .
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