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AH3761
HIGH SENSITIVITY HALL EFFECT LATCH
Features
* * * * * * * * * 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)
General Description
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).
Application
* * * * Brush-less DC Motor Commutation RPM Detection Consumer and industrial position sensor Flow meters
Typical Application Circuit
Vdd
R 1 AH3761 2 3 Output
GND
AH3761 Rev. 1
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AH3761
HIGH SENSITIVITY HALL EFFECT LATCH
Ordering Information
AH3761-XG-X
Package P : SIP3 W : SC59
Green G : Green
Packing A : Ammo Box (Note 3) B : Bulk (Note 4) 7 : Tape & Reel
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
Bulk Device AH3761-PG-A AH3761-PG-B AH3761-WG-7
Notes:
Package Code P P W
Packaging (Note 2) SIP3 SIP3 SC59
Quantity NA 1000 NA
Part Number Suffix NA -B 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 )
3. OUT 2. GND 1. Vdd
( Top View ) 3. OUT GND 2. 1 . Vdd
Pin Descriptions
Pin Name Vdd GND OUT P/I/O P P O Pin # 1 2 3 Description Positive Power Supply Ground Output Pin
AH3761 Rev. 1
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AH3761
HIGH SENSITIVITY HALL EFFECT LATCH
Block Diagram
Vdd Power switch To All Subcircuits VOUT Control Sample and Hold Low-Pass Filter Dynamic Offset Cancellation
Amp
Amp
Current Limit
GND
Absolute Maximum Ratings
Symbol Vdd Vrdd B VDS IO(peak) TST TJ(MAX) PD JC
(at TA = 25oC)
Characteristics Supply Voltage Reverse Battery Voltage Magnetic Flux Density Output OFF Voltage Output "On" Current (Peak) Storage Temperature Range Maximum Junction Temperature Package Power Dissipation Thermal Resistance Junction to case SIP3 SC59 SIP3 SC59
Values 30 -30 Unlimited 30 100 -65~+150 150 550 230 227 543
Unit V V V mA C C mW mW C/W C/W
Recommended Operating Conditions
Symbol Vdd TA Characteristic Supply Voltage Operating Ambient Temperature Conditions Operating Operating Min 3 -40 Typ. 24 Max 28 125 Unit V C
AH3761 Rev. 1
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AH3761
HIGH SENSITIVITY HALL EFFECT LATCH
Electrical Characteristics
Symbol Vo(sat) Ioff Idd Characteristic Output Saturation Voltage Output Leakage Current Supply Current Output Rising Time Output Falling Time Chopping Frequency Output Current Limit Start-up time of IC
(TA =+ 25C, Vdd =24V, Note 7)
Test Conditions Iout =20mA, B>Bop VO =24V, BBop (Note 5) Vdd>3V, B>Bop (Note 6)
Min 50 -
Typ. 300 < 0.1 4 340 20 300 70 47
Max 500 10 6 90 -
Unit mV uA mA ns ns KHz mA us
tr
tf
fc
IOM
tST
Notes:
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=+25C, Vdd=24V and is design information only.
Magnetic Characteristics
(TA =+ 25C, Vdd =3V to 28V, Note 8)
Symbol Bop Brp Bhys
Notes:
Parameter Operate Point Release Point Hysteresis
Min 5 -60 -
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.
Output
(Output Voltage)
S
S
Marking side
(off-state)
Vdd
Turn off
Bhy
Turn on
Marking side
(on-state)
N (SC59)
N
VSAT
VSAT Brp 0 Bop
(SIP3)
(Magnetic Flux Density B)
AH3761 Rev. 1
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AH3761
HIGH SENSITIVITY HALL EFFECT LATCH
Performance Characteristics
(1) SIP3 TA (C) PD (mW) TA (C) PD (mW)
P D (m W ) 600 500 400 300 200 100 0 0 -4 0 25 50 75 100 125 150 TA (C )
25 550 105 198
50 440 110 176
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
(2) SC59 (Commonly known as SOT23 in Asia) TA (C) PD (mW) 25 230 50 184 60 166 70 147 80 129 90 110 100 92 110 74 120 55 125 46 130 37 140 18 150 0
P D (m W ) 300
P o w e r D is s ip a tio n C u rve
200
100
0 0 -4 0 25 50 75 100 125 150 T A (C )
AH3761 Rev. 1
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AH3761
HIGH SENSITIVITY HALL EFFECT LATCH
Marking Information
(1) SIP3
( Top View )
Part Number
3761
Y WW X
Y : Year : 0~9 WW : Week : 01~52, "52" represents 52 and 53 week X : Internal Code : A~Z : Green
(2) SC59 (Commonly known as SOT23 in Asia)
( Top View )
XX Y W X
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
Part Number AH3761
Package SC59
Identification Code P8
AH3761 Rev. 1
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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
2
3
Active Area Depth
Package Dimension
Sensor Location
AH3761 Rev. 1
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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)
0.35/0.50
TOP VIEW
1.50/ 1.70
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
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AH3761
HIGH SENSITIVITY HALL EFFECT LATCH
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AH3761 Rev. 1
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