AH3761

AH3761
HIGH SENSITIVITY HALL EFFECT LATCH
General Description
Features
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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
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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
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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
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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
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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
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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
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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
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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
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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
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SEPTEMBER 2009
© Diodes Incorporated
AH3761
HIGH SENSITIVITY HALL EFFECT LATCH
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DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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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
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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
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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
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AH3761 Rev. 1
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