Discontinued Product

Transcription

1 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, 009 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. 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, assumes no responsibility for its use; nor for any infringements of patents or other rights of third parties which may result from its use.

2 Low-Voltage Full-ridge rushless D Motor Driver with Hall Element ommutation Features and enefits Single-chip solution for high reliability hopper stabilization technique for precise signal response over operating range.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 Package: ontact MLP/DFN/SON (suffix EL) 5 4 Description The A44 is a full-bridge motor driver designed to drive low-voltage bipolar brushless D motors. ommutation 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 ipolar-mos semiconductor process allows the integration of the Hall element on the same I 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 A44 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 : ontinued on the next page Functional lock Diagram 44-DS, Rev. 4

3 Low-Voltage Full-ridge rushless D Motor 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 00% matte tin) -pin surface mount MLP (microleadframe: DFN) package, with exposed pad for enhanced thermal dissipation. Selection Guide Part Number Package Packing * A44EELLT-T MLP mm; 0.50 mm nom. height 3000 pieces/ 7-in. reel *For additional packing options, contact Allegro. Absolute Maximum Ratings haracteristic Symbol Notes Rating Supply Voltage V DD 5.0 V Reverse attery Voltage V RDD 0.3 V Output Voltage V OUT 0.3 V to V DD V ontrol Input Voltage V IN(High) 0.3 V to V DD V Load urrent I LOAD Positive I LOAD flow is from VOUT to VOUT ±50 ma Magnetic Flux Density Unlimited Operating Ambient Temperature T A Range E 40º to 85º Maximum Junction T J (max) 5º Storage Temperature T stg 5º to 70º Pin-out Diagram VDD VOUT SLEEP Sleep Mode ontrol Drive ontrol Driver 5 VOUT N 3 4 GND Terminal List Table Number Name EL Package Function VDD Supply voltage S L Ē Ē P Toggle Sleep/Enabled modes N 3 No connection GND 4 Ground VOUT 5 First output VOUT Second output 5 Northeast utoff, ox 503 Worcester, Massachusetts (508)

4 Low-Voltage Full-ridge rushless D Motor DEVIE HARATERISTIS over the voltage and temperature operating range, unless otherwise specified haracteristics Symbol Test onditions Min. Typ. Max. Units Supply Voltage V DD Running V Total Output Saturation Voltage I V LOAD = 00 ma, V DD = 3. V 500 mv OUT(Sat) I LOAD = 70 ma, V DD =. V 400 mv Sleep Mode Supply urrent I DD(Sleep) 0 μa Load urrent Rise Time t r(iload) V DD = 3. V 0 μs hopping Settling Time 3 t s(hop) 30 μs S L Ē Ē P Input Threshold V INLO 0.5 V V INHI V DD 0.7 V S L Ē Ē P Input urrent I IN μa rossover Dead Time 4 t DT VOUT switching μs Restart Delay 5 t RS 5 ms OP G Magnetic Switchpoints RP G HYS OP RP ; OP > RP 70 G Startup Polarity <rp LOW V OUT >op HIGH <rp HIGH V OUT >op LOW Either V OUT(Sat) = V Q(Sat) + V Q4(Sat) or V OUT(Sat) = V Q(Sat) + V Q3(Sat). Total output saturation voltage is a sum of the voltages across the active output transistors. Time period required for current to change from 0% to 90% of it s value. 3 hopping settling time is the required time to have valid device output after power up of the device. 4 rossover dead time is a time period during which all output transistors are switched off. 5 Restart delay is a time period during which only one pair of the output transistors is switched on. 5 Northeast utoff, ox 503 Worcester, Massachusetts (508)

5 Low-Voltage Full-ridge rushless D Motor Package EL, pin MLP/DFN/SON Preliminary dimensions, for reference only (JEDE ultra-thin MO-9UD, except contact layout) Dimensions in millimeters U.S. ustomary 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 # mark area Exposed thermal pad (reference only, terminal # identifier appearance at supplier discretion) Reference land pattern layout; adjust as necessary to meet application process requirements and P layout tolerances; when mounting on a multilayer P, thermal vias at the exposed thermal pad land can improve thermal dissipation (reference EIA/JEDE Standard JESD5-5) D Hall element (not to scale) E Active area depth X0.0 MIN X 0.08 [.003] D R0.0 REF X 0.0 [.004] M A 0.05 [.00] M D A D A SEATING PLANE REF E X0.0 MIN opyright , The products described herein are manufactured under one or more of the following U.S. patents: 5,045,90; 5,4,783; 5,44,83; 5,389,889; 5,58,79; 5,57,; 5,9,37; 5,,39; 5,50,79; 5,8,894; 5,94,038; 5,79,30; 5,97,30; and other patents pending. 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 manufacturability of its products. efore 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 in for ma tion in clud ed herein is believed to be ac cu rate and reliable. How ev er, assumes no responsibility for its use; nor for any in fringe ment of patents or other rights of third parties which may result from its use. For the latest version of this document, visit our website: 5 Northeast utoff, ox 503 Worcester, Massachusetts (508)