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
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•
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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
1 of 8
www.diodes.com
MARCH 2009
©
Diodes Incorporated
AH266
HIGH VOLTAGE HALL EFFECT LATCH
Pin Assignment
( Top View )
266
1 2
3
4
SIP-4L
Pin Descriptions
Pin Name
V
CC
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
V
CC
1
DO
REG.
Hal
l
Plate
Amp
DOB
AH266 Rev. 4
2 of 8
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MARCH 2009
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Diodes Incorporated
AH266
HIGH VOLTAGE HALL EFFECT LATCH
Typical Application Circuit
266
Coil 1
Coil 2
1
V
cc
2
3
4
Brush-Less DC Fan
Absolute Maximum Ratings
Symbol
V
cc
V
out (off)
I
o (con)
I
o (hold)
I
o (peak)
B
T
ST
P
D
θ
JC
Supply Voltage
Output “OFF ” Voltage
Output “ON” Current
(T
A
= 25
o
C)
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
V
CC
T
A
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. I
o (con)
is 150 mA at 85°C.
6. See
Performance Characteristics
for other conditions.
7. Shall not exceed P
D
and Safety Operation Area.
AH266 Rev. 4
3 of 8
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MARCH 2009
©
Diodes Incorporated
AH266
HIGH VOLTAGE HALL EFFECT LATCH
Electrical Characteristics
Symbol
Vz
V
ce (SAT)
I
cex
I
cc
tr
tf
Δt
Characteristic
Output Zener Breakdown
Output Saturation Voltage
Output Leakage Current
Supply Current
Output Rise Time
Output Falling Time
Switch Time Differential
(T
A
= 25°C)
Conditions
Output Turn off
V
cc
= 24V, I
C
= 400mA
V
ce
= 24V, V
CC
= 24V
V
cc
= 24V, Output Open
V
cc
= 24V, RL = 820Ω, CL = 20pF
V
cc
= 24V, RL = 820Ω, CL = 20pF
V
cc
= 24V, RL = 820Ω, 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
µA
mA
µs
µs
µs
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
4 of 8
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MARCH 2009
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Diodes Incorporated
AH266
HIGH VOLTAGE HALL EFFECT LATCH
Magnetic Characteristics
A grade
Symbol
Bop
Brp
Bhy
B grade
Symbol
Bop
Brp
Bhy
(T
A
= +25
o
C)
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
B
hy
Turn off
Turn off
B
hy
Turn on
V
SAT
Brp
0
Bop
Magnetic Flux Density in Gauss
V
SAT
Brp
0
Bop
Magnetic Flux Density in Gauss
Performance Characteristics
T
A
(°C)
P
D
(mW)
T
A
(°C)
P
D
(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
5 of 8
www.diodes.com
MARCH 2009
©
Diodes Incorporated
