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부품번호 | AH3774 기능 |
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기능 | HIGH-VOLTAGE HIGH-SENSITIVITY HALL EFFECT LATCH | ||
제조업체 | Diodes | ||
로고 | |||
전체 14 페이지수
AH3774
HIGH-VOLTAGE HIGH-SENSITIVITY HALL EFFECT LATCH
Description
The AH3774 is a high-voltage, high-sensitivity Hall Effect Latch IC
designed for commutation of brushless DC motor, flow meters, linear
encoders and position sensors in industrial and consumer home
appliance and personal care applications. To support a wide range of
demanding applications, the design is optimized to operate over the
supply range of 3.0V to 28V. With chopper stabilized architecture and
an internal bandgap regulator to provide temperature compensated
supply for internal circuits, the AH3774 provides a reliable solution
over the whole operating range. For robustness and protection, the
device has a reverse blocking diode with a Zener clamp on the
supply. The output has an over current limit and a Zener clamp.
Pin Assignments
(Top View)
GND 2
3 OUTPUT
1 VDD
SC59 and SOT23
The single open-drain output can be switched on with South Pole of
sufficient strength and switched off with North Pole of sufficient
strength. When the magnetic flux density (B) perpendicular to the
package is larger than the operate point (Bop) the output is switched
on (pulled low). The output is held latched until magnetic flux density
reverses and becomes lower than the release point (Brp).
The magnetic operating and release polarity is opposite for SOT23
and SC59 packages. SOT23 and SIP-3 packages will require South
Pole to the part marking side to operate while SC59 will require South
Pole to the non-part marking side.
(Top View)
SIP-3
3. OUTPUT
2. GND
1. VDD
Features
• Bipolar Latch (South Pole: On, North Pole: Off)
• 3.0V to 28V Operating Voltage Range
• High Sensitivity: Bop and Brp of +40G and -40G Typical
• Single Open Drain Output with Over Current Limit
• Chopper Stabilized Design Provides
• Superior Temperature Stability
Minimal Switch Point Drift
Enhanced Immunity to Stress
• Good RF Noise Immunity
• Reverse Blocking Diode and Zener Clamp on Supply
• -40°C to +125°C Operating Temperature
• ESD (HBM): 6kV
• Industry Standard SC59, SOT23 and SIP-3 Packages
• Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
• Halogen and Antimony Free. “Green” Device (Note 3)
Applications
• Brushless DC Motor Commutation
• Revolution Per Minute (RPM) Measurement
• Flow Meters
• Angular and Linear Encoder and Position Sensors
• Contact-less Commutation, Speed Measurement and Angular
Position Sensing/Indexing in Consumer Home Appliances, Office
Equipments and Industrial Applications
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl)
and <1000ppm antimony compounds.
AH3774
Document number: DS37899 Rev. 1 - 2
1 of 14
www.diodes.com
September 2015
© Diodes Incorporated
AH3774
Magnetic Characteristics (Notes 11 & 12) (TA = -40°C to +125°C, VDD = 3.0V to 28V, unless otherwise specified) (1mT=10 Gauss)
Symbol
Parameter
Bop (South Pole to part marking side for
SOT23 and SIP-3 packages);
South Pole to the non-part marking side
for SC59 package. See diagram below)
Operation Point
Conditions
VDD = 12V, TA = +25°C
TA = -40°C to +125°C
Min Typ Max Unit
— 40 —
20 40 60
Brp (North Pole to part marking side for
SOT23 and SIP-3 packages;
North Pole to the non-part marking side
for SC59 package. See diagram below)
Release Point
VDD = 12V, TA = +25°C
TA = -40°C to +125°C
— -40 —
Gauss
-60 -40 -20
Bhy (|Bopx|-|Brpx|)
Hysteresis (Note 13)
VDD = 12V, TA = +25°C
TA = -40°C to +125°C
— 80 —
40 80 120
Notes:
11. When power is initially turned on, VDD must be within its correct operating range (3.0V to 28V) to guarantee the output sampling. The output state is
valid after the start-up time of 10µs typical from the operating voltage reaching 3V.
12. Typical values are defined at TA = +25°C, VDD = 12V. Maximum and minimum values over the operating temperature range is not tested in production
but guaranteed by design, process control and characterization.
13. Maximum and minimum hysteresis is guaranteed by design, process control and characterization.
Output
(off-state)
VDD
Turn off
Bhy
Turn on
Brp 0
(on-state)
VOUT_ON = VOUT(SAT)
Bop
( Magnetic Flux Density B )
S
Part mark
N
(SC59)
S
Part mark
S
Part mark
N
(SOT23)
N
(SIP-3)
AH3774
Document number: DS37899 Rev. 1 - 2
4 of 14
www.diodes.com
September 2015
© Diodes Incorporated
4페이지 AH3774
Thermal Performance Characteristics
(1) Package types: SC59 and SOT23
TA (°C)
PD (mW)
25 50 60 70 80 85 90 100 105 110 120 125 130 140 150
230 184 166 147 129 120 110 92 83 74 55 46 37 18 0
Power Dissipation Curve
300
200
100
0
-040
25
50 75 100
Ambient Temperature TA (oC)
125
150
(2) Package type: SIP-3
TA (°C)
PD (mW)
25 50 60 70 80 85 90 100 105 110 120 125 130 140 150
550 440 396 362 308 286 264 220 198 176 132 110 88
44
0
PD (mW)
600
500
400
300
200
100
0
-040
Power Dissipation Curve
25 50 75
100 125 150
TA (°C)
AH3774
Document number: DS37899 Rev. 1 - 2
7 of 14
www.diodes.com
September 2015
© Diodes Incorporated
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DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |