A1441 Hall Effect Direction Detection Sensor Discontinued Product This device is no longer in production. The device should not be purchased for new design applications. Samples are no longer available. Date of status change: November 2, 2009 Recommended Substitutions: For existing customer transition, and for new customers or new applications, contact Allegro Sales. NOTE: For detailed information on purchasing options, contact your local Allegro field applications engineer or sales representative. Allegro MicroSystems, Inc. reserves the right to make, from time to time, revisions to the anticipated product life cycle plan for a product to accommodate changes in production capabilities, alternative product availabilities, or market demand. The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, Inc. assumes no responsibility for its use; nor for any infringements of patents or other rights of third parties which may result from its use. A1441 Low-Voltage Full-Bridge Brushless DC Motor Driver with Hall Element Commutation Features and Benefits Description ▪ Single-chip solution for high reliability ▪ Chopper stabilization technique for precise signal response over operating range ▪ 2.0 to 4.0 V operation ▪ Sleep mode pin allowing external logic signal enable/ disable to reduce average power consumption ▪ Restart feature ▪ Small package size The A1441 is a full-bridge motor driver designed to drive low-voltage bipolar brushless DC motors. Commutation of the motor is achieved by use of a single Hall element to detect the position of an alternating-pole ring magnet. A high density merged Bipolar-CMOS semiconductor process allows the integration of the Hall element on the same IC as the motor control circuitry, providing a single-chip solution for enhanced reliability. All necessary circuitry is incorporated within the device package, eliminating the need for any external support components. Package: 6 Contact MLP/DFN/SON (suffix EL) 6 1 2 5 4 A micropower sleep mode can be enabled by an external signal, to reduce current consumption for battery management in portable electronic devices. In addition, the device offers an active function for motor braking. The A1441 is optimized for vibration motor applications such as cellular phones, pagers, electronic toothbrushes, and handheld video game controllers. These devices also drive low power fan motors designed with cogging plates. 3 Approximate Scale 1:1 Continued on the next page… Functional Block Diagram 1441-DS, Rev. 4 A1441 Low-Voltage Full-Bridge Brushless DC Motor Driver with Hall Element Commutation Description (continued) The small package outlines and low profiles make this device ideally suited for use in applications where printed circuit board area and component headroom are at a premium. It is available in a lead (Pb) free (leadframe plating 100% matte tin) 6-pin surface mount MLP (microleadframe: DFN) package, with exposed pad for enhanced thermal dissipation. Selection Guide Packing* 3000 pieces/ 7-in. reel Part Number Package A1441EELLT-T MLP 2×2 mm; 0.50 mm nom. height *For additional packing options, contact Allegro. Absolute Maximum Ratings Characteristic Symbol Notes Rating Supply Voltage VDD Reverse Battery Voltage VRDD –0.3 V Output Voltage VOUT –0.3 V to VDD + 0.3 V Control Input Voltage Load Current ILOAD B Operating Ambient Temperature TA Storage Temperature –0.3 V to VDD + 0.3 V VIN(High) Magnetic Flux Density Maximum Junction 5.0 V Positive ILOAD flow is from VOUT1 to VOUT2 ±150 mA Unlimited Range E –40ºC to 85ºC TJ(max) 165ºC Tstg –65ºC to 170ºC Pin-out Diagram VDD 1 Sleep Mode Drive Control Control SLEEP 2 6 VOUT2 5 VOUT1 4 GND Driver NC 3 Terminal List Table Name VDD Number Function EL Package 1 Supply voltage S̄ ¯L̄¯Ē ¯Ē¯P̄¯ 2 Toggle Sleep/Enabled modes NC 3 No connection GND 4 Ground VOUT1 5 First output VOUT2 6 Second output Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com 2 A1441 Low-Voltage Full-Bridge Brushless DC Motor Driver with Hall Element Commutation DEVICE CHARACTERISTICS over the voltage and temperature operating range, unless otherwise specified Characteristics Symbol Test Conditions Min. Typ. Max. Supply Voltage VDD Running 2.0 – 4.0 I = 100 mA, VDD = 3.6 V – – 500 Total Output Saturation Voltage1 VOUT(Sat) LOAD ILOAD = 70 mA, VDD = 2.2 V – – 400 Sleep Mode Supply Current IDD(Sleep) – – 10 tr(ILOAD) VDD = 3.6 V – 10 – Load Current Rise Time2 3 Chopping Settling Time ts(CHOP) – 30 – VINLO – – 0.5 S̄¯L̄¯Ē ¯Ē¯P̄¯ Input Threshold VINHI VDD–0.7 – – I – – 1 S̄ ¯L̄¯Ē ¯Ē ¯P̄¯ Input Current IN 4 Crossover Dead Time tDT VOUT switching – 2 – Restart Delay5 tRS – – 225 BOP – 35 75 Magnetic Switchpoints BRP –75 –35 – BHYS BOP – BRP; BOP > BRP – 70 – LOW HIGH Startup Polarity HIGH VOUT2 LOW 1Either V = V + V or V = V + V . Total output saturation voltage is a sum of the voltages OUT(Sat) Q1(Sat) Q4(Sat) OUT(Sat) Q2(Sat) Q3(Sat) across the active output transistors. 2Time period required for current to change from 10% to 90% of it’s value. 3Chopping settling time is the required time to have valid device output after power up of the device. 4Crossover dead time is a time period during which all output transistors are switched off. 5Restart delay is a time period during which only one pair of the output transistors is switched on. VOUT1 B<Brp B>Bop B<Brp B>Bop Units V mV mV μA μs μs V V μA μs ms G G G – – – – Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com 3 Low-Voltage Full-Bridge Brushless DC Motor Driver with Hall Element Commutation A1441 Package EL, 6 pin MLP/DFN/SON 2.15 .085 1.85 .073 Preliminary dimensions, for reference only (JEDEC ultra-thin MO-229UCCD, except contact layout) Dimensions in millimeters U.S. Customary dimensions (in.) in brackets, for reference only Dimensions exclusive of mold flash, gate burrs, and dambar protrusions Exact case and lead configuration at supplier discretion within limits shown A Terminal #1 mark area A D 1.00 .0394 B E 6 D D 1.00 .0394 2.15 .085 1.85 .073 B Exposed thermal pad (reference only, terminal #1 identifier appearance at supplier discretion) A C Reference land pattern layout; adjust as necessary to meet application process requirements and PCB layout tolerances; when mounting on a multilayer PCB, thermal vias at the exposed thermal pad land can improve thermal dissipation (reference EIA/JEDEC Standard JESD51-5) D Hall element (not to scale) 1 6X E Active area depth 2 SEATING PLANE 0.08 [.003] C 0.32 .013 6X 0.20 .008 4X0.20 .008 MIN 0.30 .012 NOM 6 0.60 .024 NOM C 0.55 .022 0.45 .018 0.10 [.004] M C A B 0.05 [.002] M C 0.50 .020 1 2 0.15 .006 REF 0.05 .002 0 0.00 .000 R0.20 .008 REF 2X0.20 .008 MIN C 1 1.00 .039 NOM 0.50 .020 NOM B 0.35 .014 0.15 .006 1.00 .039 NOM 6 1.45 .057 NOM 1.45 .057 NOM Copyright ©2005-2008, Allegro MicroSystems, Inc. The products described herein are manufactured under one or more of the following U.S. patents: 5,045,920; 5,264,783; 5,442,283; 5,389,889; 5,581,179; 5,517,112; 5,619,137; 5,621,319; 5,650,719; 5,686,894; 5,694,038; 5,729,130; 5,917,320; and other patents pending. Allegro MicroSystems, Inc. reserves the right to make, from time to time, such departures from the detail specifications as may be required to permit improvements in the performance, reliability, or manufacturability of its products. Before placing an order, the user is cautioned to verify that the information being relied upon is current. Allegro’s products are not to be used in life support devices or systems, if a failure of an Allegro product can reasonably be expected to cause the failure of that life support device or system, or to affect the safety or effectiveness of that device or system. The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, Inc. assumes no responsibility for its use; nor for any infringement of patents or other rights of third parties which may result from its use. For the latest version of this document, visit our website: www.allegromicro.com Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com 4