ah276q complementary output hall effect latch ah276q rev. 5 1 of 8 november 2009 ds31066 www.diodes.com ? diodes incorporated ? on-chip hall sensor with two different sensitivity and hysteresis settings for ah276 ? built-in protecting diode only for chip reverse power connecting ? -20 c to 85 c operating temperature ? lead free package: sip-4l ? sip-4l: available in ?green? molding compound (no br, sb) ? lead free finish/rohs compliant (note 1) ah276 are integrated hall sensors with output drivers, mainly designed for electronic commutation of brush-less dc fan. this ic internally includes the regulator, protecting diode, hall plate, amplifier, comparator, and a pair of complementary open-collector outputs (do, dob) . while the magnetic flux density (b) is larger than operate point (bop) , do will turn on (low), and meanwhile dob will turn off (high). each output is latched until b is lower than release point (brp), and then do, dob transfer each state. for dc fan application, sometimes need to test power reverse connection condition. internal diode only protects chip-side but not for coil-side. if necessary, add one external diode to block the reverse current from coil-side. ? dual-coil brush-less dc motor ? dual-coil brush-less dc fan ? revolution counting ? speed measurement ah 276 q - p x - b - x p : sip-4l package lead free l : lead free version magnetic characteristics q a or b or c (note 3) packing b : bulk g : green device package code packaging (note 2) bulk magnetic characteristics quantity part number suffix ah276q-pl-b-a p sip-4l 1000 -b a ah276q-pl-b-b p sip-4l 1000 -b b ah276q-pl-b-c p sip-4l 1000 -b c AH276Q-PG-B-A p sip-4l 1000 -b a ah276q-pg-b-b p sip-4l 1000 -b b ah276q-pg-b-c p sip-4l 1000 -b c 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. please refer to page 4 (magnetic characteristics table). features general description applications ordering information
ah276q complementary output hall effect latch ah276q rev. 5 2 of 8 november 2009 ds31066 www.diodes.com ? diodes incorporated 276 12 4 3 1 : vcc 2 : do 3 : dob 4 : gnd ( top view ) pin name p/i/o pin # description vcc p 1 power supply input do o 2 output pin dob o 3 output pin gnd p 4 ground block diagram 1 reg. hall plate amp do gnd 2 3 4 vcc dob pin assignment pin descriptions
ah276q complementary output hall effect latch ah276q rev. 5 3 of 8 november 2009 ds31066 www.diodes.com ? diodes incorporated typical application circuit 12 4 3 276 1uf/25v 12v brush-less dc fan absolute maximum ratings (@ t a =25 c) symbol characteristics rating unit v cc supply voltage 20 v v rcc reverse v cc polarity voltage -20 v b magnetic flux density unlimited io output ?on? current (note 4) continuous 0.4 a hold 0.5 peak (start up) 0.7 ts storage temperature range -65~+150 c p d package power dissipation (sip-4l) 550 mw t j maximum junction temperature 150 c jc thermal resistance (sip-4l) 227 c/w notes: 4. p d shall be within safety operation area. t j t a ja jc tc
ah276q complementary output hall effect latch ah276q rev. 5 4 of 8 november 2009 ds31066 www.diodes.com ? diodes incorporated recommended oper ating conditions symbol characteristic conditions min max unit v cc supply voltage (note 5) operating 3.5 20 v t a operating ambient temperature operating -20 85 c notes: 5. the output do/dob is switching as magnetic field change (s>300g, n<-300g). electrical characteristics (t a =+25 c) symbol characteristic conditions min typ. max unit vz o utput zener breakdown (note 6) - 35 - v vce(sat) o utput saturation voltage vcc=14v, i l =400ma - 0.6 0.9 v icex o utput leakage current vce=14v, vcc=14v - < 0.1 10 a icc s upply current vcc=20v, output open 7 16 25 ma notes: 6. vz is a typical value for design reference. vz will vary with different coils design.
ah276q complementary output hall effect latch ah276q rev. 5 5 of 8 november 2009 ds31066 www.diodes.com ? diodes incorporated magnetic characteristics (t a =+25 c, v cc =14v, note 7) a grade symbol characteristic min typ. max unit bop operate point 10 - 50 gauss brp release point -50 - -10 gauss bhy hysteresis - 75 - gauss b grade symbol characteristic min typ. max unit bop operate point 5 - 70 gauss brp release point -70 - -5 gauss bhy hysteresis - 75 - gauss c grade symbol characteristic min typ. max unit bop operate point - - 100 gauss brp release point -100 - - gauss bh y h y steresis -75 - gauss notes: 7. magnetic characteristics are for design information, which will vary with supply voltage, operating temperature an d after soldering. b hy v sat v cc ( output voltage ) b rp b op 0 s n ( magnetic flux density b ) do turn on turn off ( off-state ) ( on-state ) b hy v sat v cc ( output voltage ) b rp b op 0 s n ( magnetic flux density b ) dob turn off turn on ( off-state ) ( on-state )
ah276q complementary output hall effect latch ah276q rev. 5 6 of 8 november 2009 ds31066 www.diodes.com ? diodes incorporated performance characteristics 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 (mw ) 85 marking information 276q part number ( top view ) y ww x x : internal code : a~z : lead free y : year : 0~9 ww : week : 01~52, " 52" represents 52 and 53 week a~z : green sip-4l
ah276q complementary output hall effect latch ah276q rev. 5 7 of 8 november 2009 ds31066 www.diodes.com ? diodes incorporated package information (all dimensions in mm) (1) package type: sip-4l active area depth sensor location marking side 0.7mm 1. 1 ? 0.1mm 1234 1.95 ? 0.1mm package dimension
ah276q complementary output hall effect latch ah276q rev. 5 8 of 8 november 2009 ds31066 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 liability arising out of the application or use of this document or any product described herein; neither does diodes incorpora ted convey any license under its patent or trademark rights, nor the rights of others. any customer or user of this document or pr oducts described 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 application. 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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