A1441

A1441 ALLEGRO | Alldatasheet

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A1441-DS Worcester, Massachusetts 01615-0036 (508) 853-5000

115 Northeast Cutoff, Box 15036

www.allegromicro.com Allegro MicroSystems, Inc. AB SO LUTE MAX I MUM RAT INGS Control Input V oltage,VIN(High) –0.3 V to VDD + 0.3 V Operating Temperature Ambient, T *Positive ILOAD flow is from VOUT1 to VOUT2. 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 sensor to detect the position of an alternating-pole ring magnet. A high density merged Bipolar-CMOS semiconductor process allows the integra- tion 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 incor- porated within the device package, eliminating the need for any external support components. 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 hand-held video game controllers. These devices also drive low power fan motors designed with cogging plates. The small package outline and low profile 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 MLP microleadframe package for surface mount, with exposed pad for enhanced thermal dissipation. Low-Voltage Full-Bridge Brushless DC Motor Driver with Hall Element Commutation Use the following complete part numbers when ordering: Features and Benefits Part Number Package Packing A1441SELLT-T 2×2×0.50 mm 7-in. Reel, 3000 pieces/reel Package EL, 6-pin Surface Mount MLP 1 2 3 6 5 4 Approximate Actual Size Package EL 2 × 2 mm

A1441-DS Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com Allegro MicroSystems, Inc. Low-Voltage Full-Bridge Brushless DC Motor Driver with Hall Element Commutation A1441 Functional Block Diagram Package EL, 2 × 2 mm, 6-pin Surface Mount MLP Terminal List Table Pin Name Function

1 VDD Supply voltage

3 NC No connection

4 GND Ground

5 VOUT1 First output

6 VOUT2 Second output

A1441-DS Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com Allegro MicroSystems, Inc. Low-Voltage Full-Bridge Brushless DC Motor Driver with Hall Element Commutation A1441 DEVICE CHARACTERISTICS over the voltage and temperature operating range, unless otherwise specified Characteristics Symbol Test Conditions Min. Typ. Max. Units Supply Voltage V DD Running 2.0 – 4.0 V Total Output Saturation Voltage1 VOUT(Sat) ILOAD = 70 mA, VDD = 3.6 V – 300 – mV ILOAD = 100 mA, VDD = 3.6 V – 450 – mV ILOAD = 70 mA, VDD = 2.2 V – 400 – mV Sleep Mode Supply Current I DD(Sleep) –– 1 0 μA Load Current Rise Time2 tr(ILOAD) VDD = 3.6 V – 10 – μs Chopping Settling Time3 ts(CHOP) –3 0– μs VINHI VDD–0.7 – – V Crossover Dead Time4 tDT VOUT switching – 2 – μs Restart Delay5 tRS – 100 – ms Magnetic Switchpoints BOP –3 5 7 5 G BRP –75 –35 – G BHYS BOP – BRP; BOP > BRP –7 0–G Startup Polarity VOUT1 B<Brp LOW – B>Bop HIGH – VOUT2 B<Brp HIGH – B>Bop LOW – 1Either VOUT(Sat) = VQ1(Sat) + VQ4(Sat) or VOUT(Sat) = VQ2(Sat) + VQ3(Sat). Total output saturation voltage is a sum of the voltages 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.

A1441-DS Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com Allegro MicroSystems, Inc. Low-Voltage Full-Bridge Brushless DC Motor Driver with Hall Element Commutation A1441 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; 5,686,894; 5,694,038; 5,729,130; 5,917,320; and other patents pend- ing. Allegro MicroSystems, Inc. reserves the right to make, from time to time, such de par tures from the detail spec i fi ca tions as may be required to permit improvements in the per for mance, reliability, or manufactur- ability of its products. Before placing an order, the user is cautioned to verify that the information being relied upon is current. Allegro products are not authorized for use as critical components in life-support devices or sys tems without express written approval. The in for ma tion in clud ed herein is believed to be ac cu rate and reli- able. How ev er, Allegro MicroSystems, Inc. assumes no re spon si bil i ty for its use; nor for any in fringe ment of patents or other rights of third parties which may result from its use. Copyright © 2005, Allegro MicroSystems, Inc. Package EL, 6-Pin MLP 1.100 MAX .043 1.550 BSC .061 0.32 MIN .013 0.50 BSC .020 1.100 0.850 .043 .033 0.32 0.20 .013 .008 1.550 1.300 .061 .051 0.35 0.15 .014 .006 0.50 BSC .020 2.00 BSC .079 0.55 0.45 .022 .018 0.05 0.00 .002 .000 0.15 REF .006 R0.200 REF .008 0.50 NOM .020 0.15 MIN .006 2.40 REF .094 0.20 REF .008 A Dimensions in millimeters U.S. Customary dimensions (in.) in brackets, for reference only A Pin index area B Exposed thermal pad C D Optional thermal vias, ∅0.30 [.012], pitch 1.2 [.047] Typical pad layout; adjust as necessary to meet application process requirementsC D B 1.00 .0394E E 1.00 .0394E Hall element (not to scale), controlling dimension inches E