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AH375 Dataheets PDF



Part Number AH375
Manufacturers Diodes Incorporated
Logo Diodes Incorporated
Description SINGLE PHASE HALL EFFECT LATCH
Datasheet AH375 DatasheetAH375 Datasheet (PDF)

AH375 SINGLE PHASE HALL EFFECT LATCH Description Pin Assignments AH375 is an integrated Hall-Effect latched sensor 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, and a Schmitt trigger to provide switching hysteresis for noise rejection, and open drain output. An internal band-gap regulator provides a temperature compensated supply voltage for inte.

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AH375 SINGLE PHASE HALL EFFECT LATCH Description Pin Assignments AH375 is an integrated Hall-Effect latched sensor 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, and a Schmitt trigger to provide switching hysteresis for noise rejection, and open drain output. An internal band-gap regulator provides a temperature compensated supply voltage for internal circuits and allows a wide operating supply range. When the magnetic flux density (B) is larger than operate point (Bop), output is switched on (OUT pin is pulled low). The output state is held on until a magnetic flux density reversal falls below Brp. When B is less than Brp, the output is switched off. (Top View) SIP-3L 3. OUT 2. GND 1. Vdd (Top View) GND 2. SC59 3. OUT 1. Vdd The AH375 is available in SIP-3L and SC59 packages. Features • Bipolar Hall-Effect latch sensor • 2.2V to 20V DC Operating voltage • Temperature compensation • Open drain pre-driver • 25mA maximum output sink current • Operating temperature: -40°C to +125°C • SIP-3L and SC59 packages (SC59 is commonly known as SOT23 in Asia) • Green Molding Compound (No Br, Sb) (Note 1) Applications • Brush-Less DC Motor • Brush-Less DC Fan • Revolution Counting • Speed Measurement Notes: 1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at http://www.diodes.com/products/lead_free.html. Typical Application Circuit Vdd AH375 Document number: DS31172 Rev. 6 - 2 RL C1 AH375 3 2 Output GND 1 of 9 www.diodes.com July 2010 © Diodes Incorporated AH375 SINGLE PHASE HALL EFFECT LATCH Pin Descriptions Pin Name Vdd GND OUT P/I/O P P O Pin # 1 2 3 Description Positive Power Supply Ground Output Pin Functional Block Diagram Vdd 1 Regulator Hall plate Amp 23 OUT 2 GND Absolute Maximum Ratings (TA = 25°C) Symbol Vdd B VDS Id TS TJ(MAX) PD Characteristics Supply Voltage Magnetic Flux Density Output OFF Voltage Output “On” Current Storage Temperature Range Maximum Junction Temperature Package Power Dissipation θJC Thermal Resistance Continuous SIP-3L SC59 SIP-3L SC59 Recommended Operating Conditions Values 20 Unlimited 30 25 -65~+150 150 550 230 227 543 Unit V V mA °C °C mW °C/W Symbol Parameter Conditions Min Max Unit Vdd Supply Voltage (Note 2) TA Operating Ambient Temperature Operating Operating 2.2 -40 20 V 125 °C Notes: 2. The output of IC will be switched after the supply voltage is over 2.2V, but the magnetic characteristics won't be normal until the supply is over 2.5V. AH375 Document number: DS31172 Rev. 6 - 2 2 of 9 www.diodes.com July 2010 © Diodes Incorporated AH375 SINGLE PHASE HALL EFFECT LATCH Electrical Characteristics (TA = 25 °C, Vdd = 12V) Symbol VDS (SAT) Ioff Idd Characteristic Output Saturation Voltage Output Leakage Current Supply Current Test Conditions Iout = 20mA VDD = 14V Output Open Min - Typ. 300 <0.1 2 Max Unit 700 mV 10 uA 4 mA Magnetic Characteristics (TA = 25 °C, Vdd = 2.5V to 20V, Note 3) Symbol Parameter Min Typ. Bops(south pole to brand side) Brps(south pole to brand side) Bhy(|Bopx|-|Brpx|) Operation Point Release Point Hysteresis 5 30 -60 -30 - 60 Notes: 3. Magnetic characteristics may vary with supply voltage, operating temperature and after soldering. (1mT = 10 Gauss) Max Unit 60 Gauss -5 Gauss - Gauss Operating Characteristics SS Marking side Marking side NN (SC59) (SIP-3L) (Output Voltage) Output (off-state) Vdd Turn off Bhy Turn on V SAT Brp 0 (on-state) VSAT Bop ( Magnetic Flux Density B) AH375 Document number: DS31172 Rev. 6 - 2 3 of 9 www.diodes.com July 2010 © Diodes Incorporated AH375 SINGLE PHASE HALL EFFECT LATCH Performance Characteristics (1) SIP-3L TA (°C) PD (mW) TA (°C) PD(mW) 25 50 60 70 80 85 550 440 396 352 308 286 105 110 115 120 125 130 198 176 154 132 110 88 P D (m W ) 600 500 400 300 200 100 0 -04 0 P ow er D iss ipation C urve 25 50 75 100 90 95 100 264 242 220 135 140 150 66 44 0 125 150 TA (°C ) (2) SC59 (commonly known as SOT23 in Asia) TA (°C) 25 50 60 70 80 85 90 100 110 120 130 140 150 PD (mW) 230 184 166 147 129 120 110 92 74 55 37 18 0 P D (m W ) 300 Pow er D issipation C urve 200 100 0 -400 2 5 5 0 7 5 1 0 0 1 2 5 1 5 0 TA (°C) AH375 Document number: DS31172 Rev. 6 - 2 4 of 9 www.diodes.com July 2010 © Diodes Incorporated Ordering Information AH375 SINGLE PHASE HALL EFFECT LATCH AH375 - X X - X Package P : SIP-3L W : SC59 Lead Free L : Lead Free G : Green (Note 4) Packing A : Ammo Box (Note 7) B : Bulk (Note 8) 7 : Tape & Reel Device AH375-PL-A Bulk Package Packaging Part Code (Note 5, 6) Quantity Number Suffix P SIP-3L NA NA 7” Tape and Reel Part Quantity Number Suffix NA NA Ammo Box Part Quantity Number Suffix 4000/Box -A AH375-PL-B P SIP-3L 1000 -B NA NA NA NA AH375-PG-A P SIP-3L NA NA NA NA 4000/Box .


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