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AH266
HIGH VOLTAGE HALL EFFECT LATCH
Features
* * * * * * * * On-Chip Hall Plate Operating Voltage: 4V~28V o Output Current: 400mA (Continuous, 25 C) Reverse Protection Diode Only for Chip Reverse Power Connecting (Note 1) Output Protection Zener Breakdown Vz = 62V (Typ.) Lead Free package: SIP-4L SIP-4L: Available in "Green" Molding Compound (No Br, Sb) Lead Free Finish/ RoHS Compliant (Note 2)
General Description
AH266 is an integrated Hall sensor with output drivers 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, a Schmitt trigger to provide switching hysteresis for noise rejection, and complementary Darlington open-collector drivers for sinking large current loads. An internal band-gap regulator is used to provide temperature compensated supply voltage for internal circuits and allows a wide operating supply range. If a magnetic flux density (B) is larger than operation point (Bop), DO will turn on (low) and DOB will turn off (high). The output state is latched prior to reaching release point (Brp). If B< Brp, DO will turn off and DOB will turn on. AH266 is rated for operation over o o temperature range from -20 C to 85 C and voltage range from 4V to 28V. The devices are available in low cost die forms or rugged 4 pin SIP packages.
Applications
* * * * Dual-Coil Brush-Less DC Motor Dual-Coil Brush-Less DC Fan Revolution Counting Speed Measurement
Ordering Information
AH 266 K - P X - B - X
Version K
Package P : SIP-4L
Lead Free L : Lead Free G : Green
Packing B : Bulk
Magnetic Characteristics A or B
Device
Lead-free
Lead-free
AH266K-PL-B-A AH266K-PL-B-B AH266K-PG-B-A AH266K-PG-B-B
Notes:
Package Code P P P P
Packaging (Note 3) SIP-4L SIP-4L SIP-4L SIP-4L
Quantity 1000 1000 1000 1000
Bulk Part Number Suffix -B -B -B -B
Magnetic Characteristics A B A B
1. Protection diode only exists at power pin (1, 4) output, not including pin (2, 3). 2. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at http://www.diodes.com/products/lead_free.html. 3. 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.
AH266 Rev. 4
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(c) Diodes Incorporated
AH266
HIGH VOLTAGE HALL EFFECT LATCH
Pin Assignment
( Top View ) 266
12
3
4
SIP-4L
Pin Descriptions
Pin 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
Block Diagram
VCC 1 DO
REG. Hal l Plate Amp
DOB
AH266 Rev. 4
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AH266
HIGH VOLTAGE HALL EFFECT LATCH
Typical Application Circuit
266
Coil 1
Coil 2
1 Vcc
2
3
4
Brush-Less DC Fan
Absolute Maximum Ratings
Symbol Vcc Vout (off) Io (con) Io (hold) Io (peak) B TST PD JC Supply Voltage Output "OFF " Voltage Output "ON" Current
(TA = 25oC)
Parameter
Rating 28 28 400 (Note 5) 500 700 Unlimited -65 ~ +150 550 227
Unit V V mA mA mA Gauss C mW C/W
Magnetic Flux Density Storage Temperature Range Power Dissipation (Note 6) Thermal Resistance Junction-to-Case
Recommended Operating Conditions
Symbol VCC TA
Notes:
Characteristic Supply Voltage Operating Ambient Temperature (Note 7)
Conditions Operating Operating
Min 4 -20
Max 28 85
Unit V C
4. This application circuit can't protect reverse coil current if power is connecting reverse. 5. Io (con) is 150 mA at 85C. 6. See Performance Characteristics for other conditions. 7. Shall not exceed PD and Safety Operation Area.
AH266 Rev. 4
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(c) Diodes Incorporated
AH266
HIGH VOLTAGE HALL EFFECT LATCH
Electrical Characteristics
Symbol Vz Vce (SAT) Icex Icc tr tf t Characteristic Output Zener Breakdown Output Saturation Voltage Output Leakage Current Supply Current Output Rise Time Output Falling Time Switch Time Differential
(TA = 25C)
Conditions Output Turn off Vcc = 24V, IC = 400mA Vce = 24V, VCC = 24V Vcc = 24V, Output Open Vcc = 24V, RL = 820, CL = 20pF Vcc = 24V, RL = 820, CL = 20pF Vcc = 24V, RL = 820, CL = 20pF
Min 54
Typ. 62 1.1 < 0.1 5 1.0 1.0 3.0
Max 70 1.5 10 10 5 1.5 10
Unit V V A mA s s s
Test Circuit
24V
266
V out 1 (DO)
RL1
V out 2 (DOB)
RL2 CL1 RL1 = RL2 = 820 Ohm CL1 = CL2 = 20 pF CL2
AH266 Rev. 4
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(c) Diodes Incorporated
AH266
HIGH VOLTAGE HALL EFFECT LATCH
Magnetic Characteristics
A grade Symbol Bop Brp Bhy B grade Symbol Bop Brp Bhy
(TA = +25oC)
Characteristic Operation Point Release Point Hysteresis
Min 10 -70 -
Typ. 80
(1mT = 10 Gauss) Max Unit 70 -10 Gauss Gauss Gauss
Characteristic Operation Point Release Point Hysteresis
DOB
Output Voltage in Volts Output Voltage in Volts
Min -100 -
Typ. 80
DO
Max 100 -
Unit Gauss Gauss Gauss
Turn on
Bhy
Turn off
Turn off
Bhy
Turn on
VSAT Brp 0 Bop Magnetic Flux Density in Gauss
VSAT Brp 0 Bop Magnetic Flux Density in Gauss
Performance Characteristics
TA (C) PD (mW) TA (C) PD (mW)
P D (m W ) 6 00 5 00 4 00 3 00 2 00 1 00 0 0 15 30 45 60 75 859 0 1 05 1 20 1 35 1 50 T A (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 owe r Dissipa tio n C urve
AH266 Rev. 4
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(c) Diodes Incorporated
AH266
HIGH VOLTAGE HALL EFFECT LATCH
Operation Characteristics
DO (Output Voltage)
VCC High
S
Marking Side
Vd
Bhy
Low
N (SIP-4L) N
VSAT Brp 0 Bop S
(Magnetic Flux Density)
Marking Information
( Top View ) Part Number
266X Y WW X
X : Version : K Y : Year : 0~9 WW : Week : 01~52, "52" represents 52 and 53 week X : Internal Code : a~z : Lead Free A~Z : Green
SIP-4L
AH266 Rev. 4
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AH266
HIGH VOLTAGE HALL EFFECT LATCH
Package Information
(1) Package type: SIP-4L
(All Dimensions in mm)
Marking side
1.10.1mm
1.950.1mm
0.7 mm
1
2
3
4
Active Area Depth
Package Dimension
Sensor Location
AH266 Rev. 4
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MARCH 2009
(c) Diodes Incorporated
AH266
HIGH VOLTAGE HALL EFFECT LATCH
IMPORTANT NOTICE Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to any product herein. Diodes Incorporated does not assume any liability arising out of the application or use of any product described herein; neither does it convey any license under its patent rights, nor the rights of others. The user of products in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on our website, harmless against all damages. LIFE SUPPORT Diodes Incorporated products are not authorized for use as critical components in life support devices or systems without the expressed written approval of the President of Diodes Incorporated.
AH266 Rev. 4
8 of 8 www.diodes.com
MARCH 2009
(c) Diodes Incorporated

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