AH3761 high sensitivity hall effect latch AH3761 rev. 1 1 of 9 september 2009 www.diodes.com ? diodes incorporated ? 3v to 28v dc operation voltage ? chopper stabilized ? wide operating voltage range ? built-in power reverse protection ? built-in voltage overshoot protection ? output short circuit protection ? open drain pre-driver ? sip3 and sc59 (commonly known as sot23 in asia) : available in ?green? molding compound (no br, sb) ? lead free finish/rohs compliant (note 1) AH3761 is an integrated hall effect latched sensor designed for electronic commutation of brush-less 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 open drain output. an internal bandgap regulator is used to provide temperature compensated supply voltage for internal circuits and allows a wide operating supply range. if a magnetic flux density larger than threshold bop, do is turned on (low). the output state is held until a magnetic flux density reversal falls below brp causing do to be turned off (high). ? brush-less dc motor commutation ? rpm detection ? consumer and industrial position sensor ? flow meters typical application circuit AH3761 1 2 3 vdd output gnd r features general description application
AH3761 high sensitivity hall effect latch AH3761 rev. 1 2 of 9 september 2009 www.diodes.com ? diodes incorporated a h 3 7 6 1 - x g - x packing p : sip3 package green a : ammo box (note 3) b : bulk (note 4) w : sc59 g : green 7 : tape & reel device package code packaging (note 2) bulk 7? tape and reel ammo box quantity part number suffix quantity part number suffix quantity part number suffix AH3761-pg-a p sip3 na na na na 4000/box -a AH3761-pg-b p sip3 1000 -b na na na na AH3761-wg-7 w sc59 na na 3000/tape & reel -7 na na notes: 1. eu directive 2002/95/ec (rohs). all applicable rohs exemptions applied. please visit our website at http://www.diodes.com/products/lead_free.html 2. pad layout as shown on diodes inc. suggested pad layout document ap02001, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf. 3. ammo box is for sip3 spread lead. 4. bulk is for sip3 straight lead. pin assignments (1) sip3 (2) sc59 1. vdd 2. gnd 3. ( top view ) out 1.vdd 3. gnd 2. out ( top view ) pin name p/i/o pin # description vdd p 1 positive power supply gnd p 2 ground out o 3 output pin ordering information pin descriptions
AH3761 high sensitivity hall effect latch AH3761 rev. 1 3 of 9 september 2009 www.diodes.com ? diodes incorporated block diagram control current limit sample and hold low-pass filter amp amp power switch to all subcircuits vou t vdd gnd dynamic offset cancellation absolute maximum ratings (at t a = 25 o c) symbol characteristics values unit vdd supply voltage 30 v vrdd reverse battery voltage -30 v b magnetic flux density unlimited v ds output off voltage 30 v i o (p eak ) output ?on? current (peak) 100 ma t st storage temperature range -65~+150 c t j ( max ) maximum junction temperature 150 c p d package power dissipation sip3 550 mw sc59 230 mw jc thermal resistance junction to case sip3 227 c/w sc59 543 c/w recommended oper ating conditions symbol characteristic conditions min typ. max unit vdd supply voltage operating 3 24 28 v t a operating ambient temperature operating -40 - 125 c
AH3761 high sensitivity hall effect latch AH3761 rev. 1 4 of 9 september 2009 www.diodes.com ? diodes incorporated electrical characteristics (t a =+ 25 c, vdd =24v, note 7) symbol characteristic test conditions min typ. max unit vo(sat) output saturation voltage iout =20ma, b>bop - 300 500 mv ioff output leakage current v o =24v, bbop (note 5) 50 70 90 ma t st start-up time of ic vdd>3v, b>bop (note 6) - 47 - us notes: 5. the device will shut down operating after the output current i o is over the output current limit i om for 160us (typically). the device will re-start up operating after resetting the supply voltage vdd. 6. i n initial power on time, the output state is kept in ?high? in this start-up time of ic. 7. typical data is at t a =+25 c, vdd=24v and is design information only. magnetic characteristics (t a =+ 25 c, vdd =3v to 28v, note 8) (1mt=10gauss) symbol parameter min typ. max unit bop operate point 5 30 60 gauss brp release point -60 -30 -5 gauss bhys hysteresis - 60 - gauss notes: 8. magnetic characteristics are for design information, which will vary with supply voltage, operating temperature an d after soldering. marking side s (sip3) n marking side s (sc59) n v dd (output voltage) brp bop 0 (magnetic flux density b) output turn off turn on (off-state) (on-state) v sat v sat bhy
AH3761 high sensitivity hall effect latch AH3761 rev. 1 5 of 9 september 2009 www.diodes.com ? diodes incorporated performance characteristics (1) sip3 t a ( c) 25 50 60 70 80 85 90 95 100 p d (mw) 550 440 396 352 308 286 264 242 220 t a ( c) 105 110 115 120 125 130 135 140 150 p d (mw) 198 176 154 132 110 88 66 44 0 power dissipation curve 0 100 200 300 400 500 600 0 25 50 75 100 125 150 t a (c ) p d (m w ) -40 (2) sc59 (commonly known as sot23 in asia) t a ( c) 25 50 60 70 80 90 100 110 120 125 130 140 150 p d (mw) 230 184 166 147 129 110 92 74 55 46 37 18 0 power dissipation curve 0 100 200 300 0 25 50 75 100 125 150 t a (c) p d (m w ) -40
AH3761 high sensitivity hall effect latch AH3761 rev. 1 6 of 9 september 2009 www.diodes.com ? diodes incorporated marking information (1) sip3 3761 part number ( top view ) y ww x x : internal code : a~z : green y : year : 0~9 ww : week : 01~52, "52" represents 52 and 53 week (2) sc59 (commonly known as sot23 in asia) xx y w x ( top view ) xx : identification code w : week : a~z : 1~26 week; x : a~z : green y : year 0~9 a~z : 27~52 week; z represents 52 and 53 week part number package identification code AH3761 sc59 p8
AH3761 high sensitivity hall effect latch AH3761 rev. 1 7 of 9 september 2009 www.diodes.com ? diodes incorporated package information (all dimensions in mm) (1) package type: sip3 for bulk only active area depth sensor location 123 2.00 +/- 0.10mm 1.15 +0.10mm/ -0.20mm 0.51mm nom branded surface package dimension
AH3761 high sensitivity hall effect latch AH3761 rev. 1 8 of 9 september 2009 www.diodes.com ? diodes incorporated package information (continued) (2) package type: sip3 for ammo pack-only (3) sc59 (commonly known as sot23 in asia) 0 . 3 5 /0 . 50 0.10/0.20 0.013/0.10 0.35/0.55 0.95 2.70/ 3.00 2.90/3.10 1.00/ 1.30 1.50/ 1.70 1.90 top view 0 o /8 o
AH3761 high sensitivity hall effect latch AH3761 rev. 1 9 of 9 september 2009 www.diodes.com ? diodes incorporated important notice diodes incorporated makes no warranty of any kind, express or implied, with regards to this document, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose (and their equivalents under the laws of any jurisdiction). diodes incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or ot her changes without further notice to this document and any product described herein. diodes incorporated does not assume any liabi lity arising out of the application or use of this document or any product described herein; neither does diodes incorporated convey any license under its patent or trademark rights, nor the rights of others. any customer or user of this document or products desc ribed herein in such applications shall assume all risks of such use and will agree to hold diodes incorporated and all the companies whose products are represented on diodes incorporated website, harmless against all damages. diodes incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthoriz ed sales channel. should customers purchase or use diodes incorporated products for any unintended or unauthorized application, customers shall indemnify and hold diodes incorporated and its representatives harmless against all claims, damages, expenses, and attorney fee s arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized a pplication. products described herein may be covered by one or more united states, international or foreign patents pending. product names and markings noted herein may also be covered by one or more united states, international or foreign trademarks. life support diodes incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the chief executive officer of diodes incorporated. as used herein: a. life support devices or systems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in significant injury to the user. b. a critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or to affect its safety or effectiveness. customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support dev ices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of diodes incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related information or support that may be provided by diodes incorporated. further, customers must fully indemnify diodes incorporated and its representatives against any damages arising out of the use of diodes incorporated products in such safety-critical, life support devices or systems. copyright ? 2009, diodes incorporated www.diodes.com
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