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ATS177
SINGLE OUTPUT HALL EFFECT LATCH
Description
ATS177 is an integrated Hall-Effect latch 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-collector output. An internal bandgap regulator provides a temperature compensated supply voltage for internal circuits and allows a wide operating supply range. When the magnetic flux density (B) is larger than operate point (Bop), output is switched on (DO pin is pulled low). The output state is held on until a magnetic flux density reversal falls below Brp. When B is less than Brp, the output is switched off. The ATS177 is available in SIP-3L package.
Pin Assignments
(Top View)
3. DO 2. GND 1. Vcc
SIP-3L
Applications
* * * * Brush-less DC Motor Brush-less DC Fan Revolution counting Speed measurement
Features
* * * * * * * * * Bipolar Hall-Effect latch sensor 3.5V to 20V DC operating voltage Temperature compensation Open-collector pre-driver 25mA maximum output sink current Built-in reverse polarity protection Operating temperature: -40C to +125C SIP-3L package Green Molding Compound (No Br, Sb) (Note 1)
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.
Notes:
Typical Application Circuit
+12V D1
R1 2K U1
L1
L2
R2 1 VCC OUTPUT GND 2 ATS177 3 Q1 NPN 3K + C1 0.47uF Q2 NPN
+
C2 0.47uF
Brush-less DC Fan ATS177
Document number: DS31055 Rev. 6 - 2
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ATS177
SINGLE OUTPUT HALL EFFECT LATCH Pin Descriptions
Pin name Vcc GND DO P/I/O P P O Pin # 1 2 3 Description Positive power supply Ground Digital output
Functional Block Diagram
Vcc 1
Regulator Hall plate 3 2 DO Amp 2 GND
Absolute Maximum Ratings (TA = 25C)
Symbol VCC VRCC B VCE PD IC TJ(MAX) TS Characteristics Supply Voltage Reverse VCC Polarity Voltage Magnetic Flux Density Output OFF Voltage Package Power Dissipation Output "ON" Current Maximum Junction Temperature Storage Temperature Range Rating 20 -20 Unlimited 30 550 25 150 -65~+150 Unit V V V mW mA C C
SIP-3L Continuous
Recommended Operating Conditions
Symbol VCC TA
Notes:
Characteristic Supply Voltage Operating Ambient Temperature (Note 2)
Conditions Operating Operating
Min 3.5 -20
Max 20 85
Unit V C
2. Shall not exceed PD and Safety Operation Area.
ATS177
Document number: DS31055 Rev. 6 - 2
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ATS177
SINGLE OUTPUT HALL EFFECT LATCH
Electrical Characteristics (TA = 25C)
Symbol VCE (sat) Icex Icc tr tf Characteristic Output Saturation Voltage Output Leakage Current Supply Current Output Rise Time Output Falling Time Test Conditions VCC = 14V, Ic = 20mA VCE = 14V, VCC = 14V VCC = 20V, Output Open VCC = 14V, RL = 820, CL = 20pF VCC = 14V, RL = 820, CL = 20pF Min Typ. 300 <0.1 5 0.3 0.3 Max 700 10 10 1.5 1.5 Unit mV uA mA us us
Test Circuit
14V
DO RL RL=820 Ohm CL=20 pF CL
Test Circuit
ATS177
Document number: DS31055 Rev. 6 - 2
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ATS177
SINGLE OUTPUT HALL EFFECT LATCH Magnetic Characteristics (TA = 25C, Note 3)
(1mT=10 Gauss) A grade Symbol Bops(south pole to brand side) Brps(south pole to brand side) Bhy(|Bopx|-|Brpx|) B grade Symbol Bops(south pole to brand side) Brps(south pole to brand side) Bhy(|Bopx|-|Brpx|)
Notes:
Parameter Operation Point Release Point Hysteresis
Min 5 -70 -
Typ. 80
Max 70 -5 -
Unit Gauss Gauss Gauss
Parameter Operation Point Release Point Hysteresis
Min -100 -
Typ. 80
Max 100 -
Unit Gauss Gauss Gauss
3. Magnetic characteristics may vary with supply voltage, operating temperature and after soldering.
DO
Output Voltage in Volts
OFF
12 10 8 6 4
OP
RP Vsat -200 -100 0
2
ON
100
200
Magnetic Flux Density in Gauss
Typical Magnetic Switch Point vs. Temperuture
100
Flux Density (B)
50 0
Bop Brp Bhys
-50 -20 25 80
o
100
Temperature ( C)
ATS177
Document number: DS31055 Rev. 6 - 2
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ATS177
SINGLE OUTPUT HALL EFFECT LATCH Performance Characteristics
(1) SIP-3L TA (C) PD (mW) TA (C) PD (mW)
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
PD (mW)
6 00 5 00 4 00 3 00 2 00 1 00 0 0 -40 25
Power Dissipation Curve
50
75
85
100
1 25
TA (oC)
15 0
ATS177
Document number: DS31055 Rev. 6 - 2
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ATS177
SINGLE OUTPUT HALL EFFECT LATCH Ordering Information
ATS177 - X X - X - X
Package P : SIP-3L
Lead Free L : Lead Free G : Green (Note 4)
Packing A : Ammo Box (Note 7) B : Bulk (Note 8) 7 : Tape & Reel
7" Tape and Reel Quantity NA NA NA NA NA NA NA NA Part Number Suffix NA NA NA NA NA NA NA NA
Magnetic Characteristics A or B
Device
Tube/Bulk Package Packaging Part Code (Note 5, 6) Quantity Number Suffix P P P P P P P P SIP-3L SIP-3L SIP-3L SIP-3L SIP-3L SIP-3L SIP-3L SIP-3L NA NA NA NA 1000 1000 1000 1000 NA NA NA NA -B -B -B -B
Ammo Box Quantity 4000/Box 4000/Box 4000/Box 4000/Box NA NA NA NA Part Number Suffix -A -A -A -A NA NA NA NA Magnetic Characteristics A B A B A B A B
ATS177-PL-A-A ATS177-PL-A-B ATS177-PG-A-A ATS177-PG-A-B ATS177-PL-B-A ATS177-PL-B-B ATS177-PG-B-A ATS177-PG-B-B Notes:
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.
Marking Information
(1) SIP-3L
(Top View)
Part Number
177
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
ATS177
Document number: DS31055 Rev. 6 - 2
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ATS177
SINGLE OUTPUT HALL EFFECT LATCH 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
ATS177
Document number: DS31055 Rev. 6 - 2
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ATS177
SINGLE OUTPUT HALL EFFECT LATCH Package Outline Dimensions (Continued)
(2) Package Type: SIP-3L for Ammo pack
ATS177
Document number: DS31055 Rev. 6 - 2
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ATS177
SINGLE OUTPUT HALL EFFECT LATCH
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ATS177
Document number: DS31055 Rev. 6 - 2
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