DatasheetsPDF.com

A1441 Dataheets PDF



Part Number A1441
Manufacturers Allegro MicroSystems
Logo Allegro MicroSystems
Description Low-Voltage Full-Bridge Brushless DC Motor Driver
Datasheet A1441 DatasheetA1441 Datasheet (PDF)

A1441 Low-Voltage Full-Bridge Brushless DC Motor Driver with Hall Element Commutation Features and Benefits ▪ 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 Description The A1441 is a full-bridge motor driver designed to drive low-voltage bipolar brushless .

  A1441   A1441


Document
A1441 Low-Voltage Full-Bridge Brushless DC Motor Driver with Hall Element Commutation Features and Benefits ▪ 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 Description 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 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. 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. www.DataSheet4U.com Package: 6 Contact MLP/DFN/SON (suffix EL) 6 5 4 1 2 3 Approximate Scale 1:1 Continued on the next page… Functional Block Diagram 1441-DS, Rev. 2 A1441 Low-Voltage Full-Bridge Brushless DC Motor Driver with Hall Element Commutation a lead (Pb) free (leadframe plating 100% matte tin) 6-pin surface mount MLP (microleadframe: DFN) package, with exposed pad for enhanced thermal dissipation. 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 Selection Guide Part Number Package Packing1 A1441EELLT-T MLP 2×2 mm; 0.50 mm nom. height 3000 pieces/ 7-in. reel A1441SEKLT-T2 1For additional packing options, contact Allegro. 2These variants are in production but have been determined to be NOT FOR NEW DESIGN. This classification indicates that sale of this device is currently restricted to existing customer applications. The device should not be purchased for new design applications because obsolescence in the near future is probable. Samples are no longer available. Status change: May 1, 2006. Absolute Maximum Ratings Characteristic Supply Voltage Reverse Battery Voltage Output Voltage Control Input Voltage Load Current Magnetic Flux Density Operating Ambient Temperature Maximum Junction Storage Temperature Symbol VDD VRDD VOUT VIN(High) ILOAD B TA TJ(max) Tstg Range E Positive ILOAD flow is from VOUT1 to VOUT2 Notes Rating 5.0 V –0.3 V –0.3 V to VDD + 0.3 V –0.3 V to VDD + 0.3 V ±150 mA Unlimited –40ºC to 85ºC 165ºC –65ºC to 170ºC Pin-out Diagram VDD 1 Sleep Mode Drive Control Control Driver 6 VOUT2 SLEEP 2 5 VOUT1 NC 3 4 GND Terminal List Table Name VDD ¯ S ¯¯ L ¯¯ E ¯¯ E ¯¯ P ¯ NC GND VOUT1 VOUT2 Number EL Package 1 2 3 4 5 6 Function Supply voltage Toggle Sleep/Enabled modes No connection Ground First output 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 VOUT(Sat) LOAD Total Output Saturation Voltage1 – – 400 ILOAD = 70 mA, VDD = 2.2 V 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 ¯ S ¯¯ L ¯¯ E ¯¯ E ¯¯ P ¯ Input Threshold VINHI VDD–0.7 – – I – – 1 ¯ S ¯¯ L ¯¯ E ¯¯ E ¯¯ P ¯ Input Current IN 4 Crossover Dead Time tDT VOUT switching – 2 – Restart Delay5 tRS – – 225 BOP – 35 75 BRP Magnetic Switchpoints –75 –35 – BHYS BOP – BRP; BOP > BRP – 70 – VOUT1 BBop BBop 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. Units V mV mV μA μs μs V V μA μs ms G G G – – – – Alle.


A1395 A1441 A16-2


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site.
(Privacy Policy & Contact)