AH3761 HIGH SENSITIVITY HALL EFFECT LATCH General Description Features • • • • • • • • • 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. 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) 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). Application • • • • Brush-less DC Motor Commutation RPM Detection Consumer and industrial position sensor Flow meters Typical Application Circuit Vdd R 1 AH3761 3 Output 2 GND AH3761 Rev. 1 1 of 9 www.diodes.com SEPTEMBER 2009 © Diodes Incorporated AH3761 HIGH SENSITIVITY HALL EFFECT LATCH Ordering Information AH3761-XG-X Package Green Packing P : SIP3 W : SC59 G : Green A : Ammo Box (Note 3) B : Bulk (Note 4) 7 : Tape & Reel Bulk Device AH3761-PG-A AH3761-PG-B AH3761-WG-7 Notes: Package Code Packaging (Note 2) Quantity P P W SIP3 SIP3 SC59 NA 1000 NA Part Number Suffix NA -B NA 7” Tape and Reel Part Quantity Number Suffix NA NA NA NA 3000/Tape & Reel -7 Ammo Box Part Quantity Number Suffix -A 4000/Box NA NA NA NA 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 ( Top View ) ( Top View ) 3. OUT 3. OUT 2. GND GND 2. 1 . Vdd 1. Vdd Pin Descriptions Pin Name P/I/O Pin # Description Vdd GND OUT P P O 1 2 3 Positive Power Supply Ground Output Pin AH3761 Rev. 1 2 of 9 www.diodes.com SEPTEMBER 2009 © Diodes Incorporated AH3761 HIGH SENSITIVITY HALL EFFECT LATCH Block Diagram Vdd Power switch To All Subcircuits Low-Pass Filter Sample and Hold Dynamic Offset Cancellation Amp VOUT Amp Control Current Limit GND Absolute Maximum Ratings Symbol Vdd Vrdd B VDS IO(peak) TST TJ(MAX) (at TA = 25oC) Characteristics Values 30 -30 Unlimited 30 100 -65~+150 150 550 230 227 543 Supply Voltage Reverse Battery Voltage Magnetic Flux Density Output OFF Voltage Output “On” Current (Peak) Storage Temperature Range Maximum Junction Temperature PD Package Power Dissipation θJC Thermal Resistance Junction to case SIP3 SC59 SIP3 SC59 Unit V V V mA °C °C mW mW °C/W °C/W Recommended Operating Conditions Symbol Vdd TA AH3761 Rev. 1 Characteristic Supply Voltage Operating Ambient Temperature Conditions Operating Operating 3 of 9 www.diodes.com Min Typ. Max Unit 3 -40 24 - 28 125 V °C SEPTEMBER 2009 © Diodes Incorporated AH3761 HIGH SENSITIVITY HALL EFFECT LATCH Electrical Characteristics Symbol Characteristic Vo(sat) Ioff Idd tf fc IOM tST Min Typ. Max Unit 50 - 300 < 0.1 4 340 20 300 70 47 500 10 6 90 - mV uA mA ns ns KHz mA us Iout =20mA, B>Bop VO =24V, B<Bop Output Open RL =10KΩ, CL =16pF RL =10KΩ, CL =16pF B>Bop (Note 5) Vdd>3V, B>Bop (Note 6) 5. The device will shut down operating after the output current IO is over the output current limit IOM for 160us (typically). The device will re-start up operating after resetting the supply voltage Vdd. 6. In initial power on time, the output state is kept in “High” in this start-up time of IC. 7. Typical data is at TA=+25°C, Vdd=24V and is design information only. Magnetic Characteristics Symbol Bop Brp Bhys Notes: Test Conditions Output Saturation Voltage Output Leakage Current Supply Current Output Rising Time Output Falling Time Chopping Frequency Output Current Limit Start-up time of IC tr Notes: (TA =+ 25°C, Vdd =24V, Note 7) (TA =+ 25°C, Vdd =3V to 28V, Note 8) Parameter Min 5 -60 - Operate Point Release Point Hysteresis Typ. 30 -30 60 (1mT=10Gauss) Max Unit 60 Gauss -5 Gauss Gauss 8. Magnetic characteristics are for design information, which will vary with supply voltage, operating temperature and after soldering. S S Marking side Marking side (Output Voltage) Output Vdd (off-state) Turn off Bhy Turn on (on-state) N N (SC59) (SIP3) VSAT VSAT Brp 0 Bop (Magnetic Flux Density B) AH3761 Rev. 1 4 of 9 www.diodes.com SEPTEMBER 2009 © Diodes Incorporated AH3761 HIGH SENSITIVITY HALL EFFECT LATCH Performance Characteristics (1) SIP3 25 550 105 198 TA (°C) PD (mW) TA (°C) PD (mW) 50 440 110 176 P D (m W ) 60 396 115 154 70 352 120 132 80 308 125 110 85 286 130 88 90 264 135 66 95 242 140 44 100 220 150 0 P o w e r D is s ip a tio n C u rve 600 500 400 300 200 100 0 00 -4 25 50 75 100 125 150 T A (°C ) (2) SC59 (Commonly known as SOT23 in Asia) TA (°C) 25 50 60 70 80 90 100 110 120 125 130 140 150 PD (mW) 230 184 166 147 129 110 92 74 55 46 37 18 0 P D (m W ) P o w e r D is s ip a tio n C u rve 300 200 100 0 -400 25 50 75 100 125 150 T A (°C ) AH3761 Rev. 1 5 of 9 www.diodes.com SEPTEMBER 2009 © Diodes Incorporated AH3761 HIGH SENSITIVITY HALL EFFECT LATCH Marking Information (1) SIP3 ( Top View ) Part Number Y : Year : 0~9 WW : Week : 01~52, "52" represents 52 and 53 week X : Internal Code : A~Z : Green 3761 Y WW X (2) SC59 (Commonly known as SOT23 in Asia) ( Top View ) XX Y W X Part Number AH3761 AH3761 Rev. 1 XX : Identification code Y : Year 0~9 W : Week : A~Z : 1~26 week; a~z : 27~52 week; z represents 52 and 53 week X : A~Z : Green Package SC59 Identification Code P8 6 of 9 www.diodes.com SEPTEMBER 2009 © Diodes Incorporated AH3761 HIGH SENSITIVITY HALL EFFECT LATCH Package Information (All Dimensions in mm) (1) Package Type: SIP3 for Bulk only 0.51mm NOM 2.00 +/0.10mm 1.15 +0.10mm/ -0.20mm BRANDED SURFACE 1 Active Area Depth 2 3 Sensor Location Package Dimension AH3761 Rev. 1 7 of 9 www.diodes.com SEPTEMBER 2009 © Diodes Incorporated AH3761 HIGH SENSITIVITY HALL EFFECT LATCH Package Information (Continued) (2) Package Type: SIP3 for Ammo Pack-only (3) SC59 (Commonly known as SOT23 in Asia) TOP VIEW 1.50/ 1.70 0.35/0.50 2.70/ 3.00 1.90 2.90/3.10 1.00/ 1.30 0.10/0.20 0.013/0.10 0.95 0.35/0.55 0 O /8 O AH3761 Rev. 1 8 of 9 www.diodes.com SEPTEMBER 2009 © Diodes Incorporated AH3761 HIGH SENSITIVITY HALL EFFECT LATCH 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 other 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 Incorporated convey any license under its patent or trademark rights, nor the rights of others. Any Customer or user of this document or products 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 unauthorized 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 fees 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 devices 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 AH3761 Rev. 1 9 of 9 www.diodes.com SEPTEMBER 2009 © Diodes Incorporated