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AH337
SINGLE PHASE HALL EFFECT SWITCH
Description
AH337 is an unipolar Hall-Effect sensor for contactless switching applications. The device includes an on-chip Hall voltage generator for magnetic sensing, an amplifier that amplifies the Hall voltage, a Schmitt trigger to provide switching hysteresis for noise rejection, and an open-collector output. The band-gap regulator allows a wide operating voltage range. When the magnetic flux density (B) is larger than operate point (Bop), output is switched on (OUT pin is pulled low). The output state is held on until a magnetic flux density falls below Brp. When B is less than Brp, the output is switched off. The AH337 is available in SIP-3L and SC59 packages.
Pin Assignments
(Top View)
3. OUT 2. GND 1. Vdd
SIP-3L
(Top View)
3. OUT GND 2. 1. Vdd
SC59
Applications
* * * * * VCD/DVD Loader, CD/DVD ROM Cover Detector Speed Measurement Home Appliances Home Safety
Features
* * * * * * * * Unipolar Hall-Effect sensor 4.2V to 28V DC operating voltage Temperature compensation Open drain pre-driver 25mA maximum output sink current Operating temperature: -40C to +125C SIP-3L and SC59 packages (SC59 is commonly known as SOT23 in Asia) Green Molding Compound (No Br, Sb) (Note 1)
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.
Typical Application Circuit
4.2V ~ 28 V
Vdd
RL
AH337
Output GND
AH337
Document number: DS31050 Rev. 9 - 2
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AH337
SINGLE PHASE HALL EFFECT SWITCH Pin Descriptions
Pin Name Vdd GND OUT P/I/O P P O Pin # 1 2 3 Description Positive Power Supply Ground Output Pin
Functional Block Diagram
Vdd 1
Regulator Hall plate Amp 2 GND 3 2 OUT
Absolute Maximum Ratings (TA = 25C)
Symbol Vdd B VDS Id TS TJ(MAX) PD Characteristics Supply Voltage Magnetic Flux Density Output OFF Voltage Output "ON" Current Storage Temperature Range Maximum Junction Temperature Package Power Dissipation Values 30 Unlimited 30 25 -65~+150 150 550 230 Unit V V mA C C mW mW
Continuous
SIP-3L SC59
Recommended Operating Conditions
Symbol Vdd TA
Notes:
Parameter Supply Voltage (Note 2) Operating Ambient Temperature
Conditions Operating Operating
Min 4.2 -40
Max 28 125
Unit V C
2. The output of IC will be switched after the supply voltage is over 4.2V, but the magnetic characteristics won't be normal until the supply is over 4.5V. 2 of 9 www.diodes.com July 2010
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AH337
Document number: DS31050 Rev. 9 - 2
AH337
SINGLE PHASE HALL EFFECT SWITCH
Electrical Characteristics (TA = 25C, Vdd = 12V)
Symbol VDS (SAT) Ioff Idd Characteristic Output Saturation Voltage Output Leakage Current Supply Current Test Conditions Iout = 10mA, B > Bop B < Brp Output Open Min Typ. 300 < 0.1 2 Max 400 10 4 Unit mV uA mA
Magnetic Characteristics (TA = 25C, Vdd = 4.5V to 28V, Note 3)
(1mT = 10 Gauss) Max Unit 150 Gauss 90 Gauss Gauss
Symbol Bops(south pole to brand side) Brps(south pole to brand side) Bhy(|Bopx|-|Brpx|)
Notes:
Parameter Operation Point Release Point Hysteresis
Min 90 30 -
Typ. 120 60 60
3. Magnetic characteristics may vary with supply voltage, operating temperature and after soldering.
Operating Characteristics
Output ( Output Voltage )
S
S
Marking side
( off -state )
Vdd
B hy
Turn off Turn on
Marking side
N (SC59)
N V SAT (SIP-3L) 0 B rp Bop
( on -state )
( Magnetic flux density B )
AH337
Document number: DS31050 Rev. 9 - 2
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AH337
SINGLE PHASE HALL EFFECT SWITCH Performance Characteristics
(1) SIP-3L 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 85 120 90 110 100 92 110 74 120 55 130 37 140 18 150 0
P D (m W ) 300
P o w e r D is s ip a tio n C u rv e
200
100
0 0 -4 0 25 50 75 100 125 150 T A (C )
AH337
Document number: DS31050 Rev. 9 - 2
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AH337
SINGLE PHASE HALL EFFECT SWITCH Ordering Information
AH337 - X X - X
Package P : SIP-3L W : SC59
Lead Free L : Lead Free G : Green (Note 4)
Packing A : Ammo Box (Note 7) B : Bulk (Note 8) 7 : Tape & Reel
Device AH337-PL-A AH337-PL-B AH337-PG-A AH337-PG-B AH337-WL-7 AH337-WG-7
Notes:
Bulk Package Packaging Part Code (Note 5, 6) Quantity Number Suffix P SIP-3L NA NA P SIP-3L 1000 -B P SIP-3L NA NA P SIP-3L 1000 -B W SC59 NA NA W SC59 NA NA
7" Tape and Reel Ammo Box Part Part Quantity Number Quantity Number Suffix Suffix NA NA 4000/Box -A NA NA NA NA NA NA 4000/Box -A NA NA NA NA 3000/Tape & Reel -7 NA NA 3000/Tape & Reel -7 NA NA
4. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at http://www.diodes.com/products/lead_free.html. 5. 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. 6. Reverse taping as shown on Diodes Inc. Surface Mount (SMD) Packaging document AP02007, which can be found on our website http://www.diodes.com/datasheets/ap02007.pdf. 7. Ammo Box is for SIP-3L Spread Lead. 8. Bulk is for SIP-3L Straight Lead.
AH337
Document number: DS31050 Rev. 9 - 2
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AH337
SINGLE PHASE HALL EFFECT SWITCH Marking Information
(1) SIP-3L
(Top View)
Part Number
337
Y WW X
Y : Year : 0~9 WW : Week : 01~52, "52" represents 52 and 53 week X : Internal Code : A~Z : Green a~z : Lead Free
(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 a~z : Lead Free
Package SC59 Identification Code P1
Part Number AH337
AH337
Document number: DS31050 Rev. 9 - 2
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AH337
SINGLE PHASE HALL EFFECT SWITCH Package Outline Dimensions (All Dimensions in mm)
(1) Package Type: SIP-3L for Bulk pack
0.51mm NOM 2.00 +/0.10mm
1.15 +/0.10mm
BRANDED SURFACE
1
2
3
Active Area Depth
Package Dimension
Sensor Location
AH337
Document number: DS31050 Rev. 9 - 2
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AH337
SINGLE PHASE HALL EFFECT SWITCH Package Outline Dimensions (Continued)
(2) Package Type: SIP-3L for Ammo pack
(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
AH337
Document number: DS31050 Rev. 9 - 2
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AH337
SINGLE PHASE HALL EFFECT SWITCH
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AH337
Document number: DS31050 Rev. 9 - 2
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July 2010
(c) Diodes Incorporated

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