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What is AH3775?

This electronic component, produced by the manufacturer "Diodes", performs the same function as "HIGH-VOLTAGE MEDIUM-SENSITIVITY HALL EFFECT LATCH".


AH3775 Datasheet PDF - Diodes

Part Number AH3775
Description HIGH-VOLTAGE MEDIUM-SENSITIVITY HALL EFFECT LATCH
Manufacturers Diodes 
Logo Diodes Logo 


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AH3775
HIGH-VOLTAGE MEDIUM-SENSITIVITY HALL EFFECT LATCH
Description
The AH3775 is a high-voltage medium-sensitivity Hall Effect latch IC
designed for commutation of brushless DC motors, flow meters,
linear encoders and position sensors in industrial and consumer
home appliances and personal care applications. To support 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 AH3775
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 overcurrent 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 Operation (South Pole: On, North Pole: off)
3.0V to 28V Operating Voltage Range
Medium Sensitivity: BOP and BRP of +70G and -70G Typical
Single, Open-Drain Output with Overcurrent 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
-40C to +125C 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
Contactless 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.
AH3775
Document number: DS37900 Rev. 1 - 2
1 of 14
www.diodes.com
September 2015
© Diodes Incorporated

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AH3775 equivalent
Typical Operating Characteristics
Magnetic Operating Switch Points BOP and BRP
180.0
160.0
140.0
120.0
100.0
80.0
60.0
40.0
20.0
0.0
-20.0
-40.0
-60.0
-80.0
-100.0
-120.0
-140.0
-160.0
-180.0
TA = +25oC
2468
Hyst
Bop
Brp
10 12 14 16 18 20 22 24 26 28 30
Supply Voltage (V)
Switch Points Bop and Brp vs Supply Voltage
AH3775
180.0
160.0
140.0
120.0
100.0
80.0
60.0
40.0
20.0
0.0
-20.0
-40.0
-60.0
-80.0
-100.0
-120.0
-140.0
-160.0
-180.0
VDD = 3V
-50 -25
0
Hyst
Bop
Brp
25 50 75 100 125 150
Temperature (oC)
Switch Points Bop and Brp vs Temperature
180.0
160.0
140.0
120.0
100.0
80.0
60.0
40.0
20.0
0.0
-20.0
-40.0
-60.0
-80.0
-100.0
-120.0
-140.0
-160.0
-180.0
VDD = 12V
-50 -25
0
Hyst
Bop
Brp
25 50 75 100 125 150
Temperature (oC)
Switch Points Bop and Brp vs Temperature
180.0
160.0
140.0
120.0
100.0
80.0
60.0
40.0
20.0
0.0
-20.0
-40.0
-60.0
-80.0
-100.0
-120.0
-140.0
-160.0
-180.0
VDD = 28V
-50 -25
0
Hyst
Bop
Brp
25 50 75 100 125 150
Temperature (oC)
Switch Points Bop and Brp vs Temperature
Supply Current
5.0
TA = +25 C
4.0
3.0
2.0
1.0
0.0
2 4 6 8 10 12 14 16 18 20 22 24 26 28 30
Supply Voltage (V)
Supply Current vs Supply Voltage
4.0
3.8
3.5
28V
3.3
3.0
2.8
3V 12V
2.5
2.3
2.0
-50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130
Temperature (oC)
Supply Current vs Temperature
AH3775
Document number: DS37900 Rev. 1 - 2
5 of 14
www.diodes.com
September 2015
© Diodes Incorporated


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