View ATS276_238929.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

ATC
Complementary Output Hall Effect Latch Features
- On-chip Hall sensor with two different sensitivity and hysteresis settings for ATS276/277 - 3.5V to 20V operating voltage - 400mA (avg) output sink current - Build-in protecting diode only for chip reverse power connecting - -20C to 85C operating temperature - Low profile 4 pin SIP package
ATS276/277
General Description
Applications
Dual-coil Brush-less DC Motor Dual-coil Brush-less DC Fan Revolution Counting Speed Measurement
ATS276/277 are integrated Hall sensors with output drivers, mainly designed for electronic commutation of brush-less DC Fan. This IC internally includes the regulator, protecting diode, Hall plate, amplifier, comparator, and a pair of complementary open-collector outputs (DO, DOB). While the magnetic flux density (B) is larger than operate point (Bop), DO will turn on (low), and meanwhile DOB will turn off (high). Each output is latched until B is lower than release point (Brp), and then DODOB transfer each state. For DC fan application, sometimes need to test power reverse connection condition. Internal diode only protects chip-side but not for coil-side. If necessary, add one external diode to block the reverse current from coil-side.
Ordering Information
ATS27X X - X X X - X
Part No. 6 : ATS276 7 : ATS277
Wafer Body Blank or A~Z : if necessary to specify
Package P: SIP-4L
Lead L : Lead Free Blank: Normal
Packing Blank : Tube or Bulk A : Tape & Reel
Magnetic Characteristics 276:A or B or C 277:A or B
Typical Application Circuit
27X
coil1
coil2
1 Vcc
2
3
4
Brush-less DC Fan
This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sale of the product.
Rev.B1 Mar 17, 2004 1/7
ATC
Complementary Output Hall Effect Latch Block Diagram
1
VCC DO
ATS276/277
2
REG.
Hall Plate
Amp
DOB
3
GND
4
Pin Assignment
277 (276) Front View
1 : VCC 2 : DO 3 : DOB 12 3 4 4 :GND
Name Vcc DO DOB GND
P/I/O P O O P
Pin # 1 2 3 4
Description Power Supply Input Output Pin Output Pin Ground
Anachip Corp. www.anachip.com.tw 2/7
Rev.B1 Mar 17, 2004
ATC
Complementary Output Hall Effect Latch Absolute Maximum Ratings ( at Ta=25C )
Characteristics Supply voltage Reverse VCC Polarity Voltage Magnetic flux density Continuous Output "on" current Hold Peak (Start Up) Operating temperature range Storage temperature range Package Power Dissipation Maximum Junction Temp Symbol VCC VRCC B Ic Values 20 -20 Unlimited 0.4 0.5 0.7 -20~+85 -65~+150 550 150 Unit V V
ATS276/277
A C C mW C
Ta Ts
PD Tj
Electrical Characteristics ( T=+25C Vcc = 4.0V to 20V )
Characteristic Low Supply Voltage Supply Voltage Output Zener Breakdown Output Saturation Voltage Output Leakage Current Supply Current Output Rise Time Output Falling Time Switch Time Differential Symbol Vce Vcc Vz Vce(sat) Icex Icc tr tf t Conditions Vcc=3.5V, IL=100mA 3.5 Vcc=14V, IL=300mA Vce=14V, Vcc=14V Vcc=20V, Output Open Vcc=14V, RL=820, CL=20pF Vcc=14V, RL=820, CL=20pF Vcc=14V, RL=820, CL=20pF 46 0.3 <0.1 16 3.0 0.3 3.0 Min Typ 0.4 20 0.6 10 25 10 1.5 10 Max Units V V V V A mA s s s
Test Circuit
14V
277 (276)
RL1
DO DOB
RL2 RL1=RL2=820 Ohm CL1=CL2=20 pF
CL1 CL2
Anachip Corp. www.anachip.com.tw 3/7
Rev.B1 Mar 17, 2004
ATC
Complementary Output Hall Effect Latch Magnetic Characteristics( Ta=+25C)
(1mT=10 Gauss) A grade Characteristic Operate Point Release Point Hysteresis B grade Characteristic Operate Point Release Point Hysteresis C grade Characteristic Operate Point Release Point Hysteresis ATS276 ATS276 ATS276 Symbol Bop Brp Bhy Min. -100 Typ. 75 Max. 100 Unit Gauss Gauss Gauss ATS276 ATS277 ATS276 ATS277 ATS276 ATS277 Symbol Bop Brp Bhy Min. 5 5 -70 -70 Typ. 75 75 Max. 70 70 -5 -5 Unit Gauss Gauss Gauss ATS276 ATS277 ATS276 ATS277 ATS276 ATS277 Symbol Bop Brp Bhy Min. 10 10 -50 -50 Typ. 75 75 Max. 50 50 -10 -10 Unit Gauss Gauss Gauss
ATS276/277
DO ( Output Voltage ) ( Output Voltage )
DOB
Vcc
( off-state )
( off-state )
Vcc
Turn off
Bhy
Turn on
Turn on
Bhy
Turn oFF
( on-state )
( on-state )
Vsat
Vsat Brp 0 Bop ( Magnetic flux density B )
Brp
0
Bop
( Magnetic flux density B )
Anachip Corp. www.anachip.com.tw 4/7
Rev.B1 Mar 17, 2004
ATC
Complementary Output Hall Effect Latch Performance Characteristics (SIP4)
Ta (C) 25 50 60 70 80 85 90 95 100 220 105 198 110 176 115 154 120 132 Pd (mW) 550 440 396 352 308 286 264 242
Pd (mW)
1000 800 600 400 200 0 0 25 50 75 85 100 125
ATS276/277
Power Dissipation Curve
Ta (C)
150
Typical Magnetic Switch Point VS. Supply Voltage
120
Flux Density (G)
Bhys
80
Bop
40 0 -40 5 12 20
Brp
24
Supply Voltage (V)
Typical Supply Current versus Supply Voltage
16 14 12 10 8 6 4 2 0 0 5
Supply Current (mA)
TA=80oC
TA=25oC
TA=-20oC
10
15
20
25
Supply Voltage (V)
Anachip Corp. www.anachip.com.tw 5/7
Rev.B1 Mar 17, 2004
ATC
Complementary Output Hall Effect Latch Operating Characteristics
DO ( Output Voltage ) S
Marking side
ATS276/277
Vcc
High
Vd Bhy
Low
N ( SIP4 ) N
Vsat Brp 0 Bop S
( Magnetic flux density )
Marking Information
( Top View ) Part Number
27X
X XX X X
Blank : normal L : Lead Free Package ID Code: A ~ Z Nth week: 01~52 Year: "1" = 2001 "2" = 2002 ~
Anachip Corp. www.anachip.com.tw 6/7
Rev.B1 Mar 17, 2004
ATC
Complementary Output Hall Effect Latch Package Information
Active Area Depth
Marking side
1.35mm
ATS276/277
Package Sensor Location
1.75mm
0.7mm
1
2
3
4
Package Dimension
5 -7 1.55mm +/-0.1mm 1.03mm +/-0.1 0.30mm +/-0.1mm 3 -5
o
o
o
14.25mm +/-1.25mm 0.38mm +/-0.03mm
o
3.65mm +/-0.1mm
0.46mm +/-0.03mm
0.38mm +/-0.03mm 3.81mm +/-0.03mm
5.22mm +/-0.1mm 4.20mm +/-0.1mm
5 -7
o
o
3 -5
o
o
27X
0.2mm Max. 1.42mm+/-0.1mm
1.27mm +/-0.03mm
Anachip Corp. www.anachip.com.tw 7/7
Rev.B1 Mar 17, 2004

▲Up To Search▲

Price & Availability of ATS276

	To Download ATS276 Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .