ATS177

ATS177 SINGLE OUTPUT HALL EFFECT LATCH Features • • • • • • • • 3.5V to 20V DC operation voltage Temperature compensation Wide operating voltage range Open-Collector pre-driver 25mA maximum sinking output current. Reverse polarity protection Lead Free Finish/RoHS Compliant for Lead Free products (Note 1) Package: SIP-3L General Description ATS177 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-collector output. An internal bandgap regulator is used to provide temperature compensated supply voltage for internal circuits and allows a wide operating supply range. If a magnetic flux density larger than threshold Bop, DO is turned on(low). The output state is held until a magnetic flux density reversal falls below Brp causing DO to be turned off (high). Applications • • • • Brush-less DC Motor Brush-less DC Fan Revolution counting Speed measurement Ordering Information ATS177 - X X X - X Package P:SIP-3L Lead L : Lead Free Magnetic Characteristics -B : Bulk (Note 3) A or B -A : Ammo Box (Note 4) Packing Note: 1. RoHS revision 13.2.2003. Glass and High Temperature Solder Exemptions Applied, see EU Directive Annex Notes 5 and 7. Device Lead-free Package Code P Packaging (Note 2) SIP-3L ATS177-P 2. Tube/Bulk Quantity Part Number Suffix 1000 -B 7” Tape and Reel Quantity Part Number Suffix NA NA Ammo Box Quantity Part Number Suffix 4000/Box -A Note: 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. 3. Bulk is for SIP-3L Straight Lead. 4. Ammo Box is for SIP-3L Spread Lead. ATS177 Rev. 1 1 of 8 www.diodes.com JANUARY 2007 © Diodes Incorporated ATS177 SINGLE OUTPUT HALL EFFECT LATCH Typical Circuit +12V D1 R1 2K U1 1 VCC OUTPUT GND 2 ATS177 3 Q1 NPN L1 L2 R2 3K + C1 0.47uF Q2 NPN + C2 0.47uF Brush-less DC Fan Functional Block Diagrams Vcc 1 Regulator Hall plate 3 2 DO Amp 2 Vss ATS177 Rev. 1 2 of 8 www.diodes.com JANUARY 2007 © Diodes Incorporated ATS177 SINGLE OUTPUT HALL EFFECT LATCH Pin Descriptions 177 1 2 3 SIP-3L Name Vcc Vss DO P/I/O P P O Pin # 1 2 3 Description Positive power supply Ground Digital output Absolute Maximum Ratings Characteristics ( at TA=25oC ) Supply Voltage Reverse Vcc Polarity Voltage Magnetic Flux Density Output OFF Voltage Output “ON” Current Continuous Operating Temperature Range Storage Temperature Range Maximum Junction Temp. Package Power Dissipation SIP-3L Symbol VCC VRCC B Vce Ic TA Ts Tj PD Values 20 -20 Unlimited 30 25 -20~+85 -65~+150 150 550 Unit V V V mA °C °C °C mW ATS177 Rev. 1 3 of 8 www.diodes.com JANUARY 2007 © Diodes Incorporated ATS177 SINGLE OUTPUT HALL EFFECT LATCH Electrical Characteristics Characteristic Supply Voltage Output Saturation Voltage Output Leakage Current Supply Current Output Rise Time Output Falling Time Symbol Vcc Vce(sat) Icex Icc tr tf (TA=+ 25°C) Test Conditions — Vcc=14V, Ic=20mA Vce=14V, Vcc=14V Vcc=20V, Output Open Vcc=14V, RL=820Ω, CL=20pF Vcc=14V, RL=820Ω, CL=20pF Min 3.5 - Typ 300