M54646AP RENESAS | Alldatasheet

Document overview

  • Manufacturer or author: pROVIDED bY alldatasheet.com(free datasheet download site)
  • PDF pages: 9

Technical content

Features

  • Wide driver voltage range (10 – 40V)
  • Wide output current control range (20 – 800mA)
  • Bipolar and constant current control
  • Built-in flywheel diode
  • Built-in thermal protection circuit Application Office automation equipment such as printers, FDDs, HDDs and facsimiles Function M54646AP Integrated Circuit drives two-phase bipolar stepper motors while controlling winding current: It controls winding current direction by inputting phases (pins 14 and 15) and, at the same time, controls winding current amperage with terminals V R (pins (2) and (27)). Provided with control circuits that output two phases, this IC is sufficient to drive a two-phase bipolar stepper motor. Pin Configuration Outline 28P4B M54646AP C 1 VR1 VMM 1 M A1 M B1 VMM 1 VCC1 Ph1 GND → ← → 28 → ← M B2 VMM 2 VCC2 Ph2 GND C 2 VR2 VMM 2 M A2 Comparator input (1) Comparator reference voltage input(1) Output stage supply voltage (1) Output terminal (1) Current sensor (1) Output terminal (1) Output current direction switch One-shot multi time constant Power supply (1) Output stage supply voltage (1) Output terminal (2) Output current direction switch One-shot multi time constant Power supply (2) Output stage supply voltage (2) Comparator input (2) Comparator reference voltage input (2) Output stage supply voltage (2) Output terminal (2) Current sensor (2)

Rev.1.0, Sep.19.2003, page 2 of 8 Block Diagram 20 21 22 23 GND Comparator reference voltage input (2) M A2 M B2 VMM 2 Output terminal (2) Output stage supply voltage (2) 16 24 6789 GND M A1 M B1 Output terminal (1) 13 5 12 17 TSD Comparator input(2) C 2 One-shot multi time constant T tOFF = 0.69 •R T • CT Current sensor Current sensor C 1 Comparator input (1) Mono- stable tOFF = 0.69 •R T • CT Current sensor One-shot multi time constant (1) T1 E1 Current sensor (1) Mono- stable Power supply (2) V CC2 Power supply (1) VCC1 Output current direction switch VR2 Ph2 Comparator reference voltage input (1) Direction switch output current VR1 Ph1 VMM 1 Output stage supply voltage (1) 19 181527 41 0142 325 Absolute Maximum Ratings (Ta = 25°C, unless otherwise noted.) Parameter Symbol Ratings Unit Conditions Supply voltage VCC −0.3 to 7 V Output stage supply voltage V MM −0.3 to 45 V Logic input voltage VL −0.3 to 6 V Analog input voltage VC −0.3 to Vcc V Reference input voltage VR −0.3 to 15 V Logic input current IL −10 mA Analog input current IC −10 mA Output current IO ±1000 mA Power dissipation Pd 1.92 W Operating temperature Topr −20 to 85 °C Storage temperature Tstg −55 to 125 °C

Rev.1.0, Sep.19.2003, page 3 of 8 Recommended Operating Condition (Ta = 25°C, unless otherwise noted.) Limits Parameter Symbol Min. Typ. Max. Unit Supply voltage VCC 4.5 5 5.5 V Output supply voltage VMM 10 40 V Output current IO 20 800 mA Logic input rise time tPLH 2 µS Logic input fall time tPHL 2 µS Thermal shutdown temperature T ON 165 °C

Electrical characteristics

(Ta = 25°C, VCC = 5.0V, unless otherwise noted.) L i m i t s Parameter Symbol Min. Typ. Max. Unit Test conditions Logic input voltage “H” V IH 2.0 Vcc V V CC =5V “L” V IL 0 0.8 Comparator threshold voltage VCH 400 430 450 mV V R =5V Comparator input current I CO −20 20 µA Output cutoff current IOFF 100 µA Total saturation voltage Vsat 3.5 V Sensing resistance is not included. (IO =500mA) Cutoff time tOFF 25 30 35 µ S V MM =10V, tON ≥ 5µs Turnoff delay td 1.6 2.0 µS dVK/dt ≥ 50mV/µs Power current ICC 25 mA V CC =5V, 1phase Logic input current “H” I IH 20 µA VI=2.4V “L” I IL −0.4 mA VI=0.4V

Rev.1.0, Sep.19.2003, page 4 of 8 Switching Characteristics Switching Waveform 1/2 tON tOFF tOFF =0.69 • RT • CT VMA – VMB or VMB – VMA td VCH VE Timing Chart Two-phase excitation Phase 1 Phase 2 Application Directions (1) Phase Input Phase input determines output mode: Phase MA MB H H L L L H (2) VR (reference voltage) Stepless current level variation is available by continuously changing VR . (3) Current sensor Compares voltage converted from amperage by current sensing resistor to designated reference voltage level. When they are the same, comparator triggers Mono-stable, and shuts off output transistor during time frame tOFF . During this period, current level decreases to slightly below reference level. When period has passed, output transistor is reactivated. This series of operations is repeated. (4) Single-pulse generator Mono-stable is triggered at comparator output phase rise edge. Mono-stable output pulse width is determined by input to timing terminals R T and CT, as follows: tOFF = 0.69 × RT × CT

Rev.1.0, Sep.19.2003, page 5 of 8 If new trigger occurs during tOFF, it is ignored. (5) Analog control Stepless output current level variation is available by continuously changing voltage VR or feedback voltage to comparator. A: Recommended operational range B: External Schottky diode to be connected betweenoutput terminal and power terminal as well as between output terminal and GND. ✽ This regulation is for temporary electric power use. For continuous use, be sure power dissipation does not go beyond package’s operational range. θj-c = 8°C/W A: Mounted on 25cm glassfiber epoxy resin circuit board with one side copper-foiled θc-a = 42°C/W B: With aluminum heat sink (1t) 10cm θc-a = 25°C/W C: With aluminum heat sink (1t) 100cm θc-a = 10°C/W Tj (max)= 150°C AREA OF SAFE OPERATION OUTPUT CURRENT Io (A) 1.0 0.8 0.6 0.4 0 1 02 03 04 0 4 5 5 0 A B DRIVER VOLTAGE V MM (V) B 0.2 THERMAL DERATING POWER DISSIPATION (W) 10.0 8.0 6.0 4.0 0 25 50 75 100 A B AMBIENT TEMPERATURE ( °C) C 2.0

Rev.1.0, Sep.19.2003, page 6 of 8 Application Example C 1 VR1 VMM 1 M A1 GND VMM 1 VCC1 Ph1 C 2 28 VR2 27 VMM 2 26 M A2 25 GND VMM 2 18

17 VCC2

15 Ph2

R S1, RS2 = 1Ω R C1 , RC2 = 1kΩ C C1 , CC2 = 820ρF R T1, RT2 = 56kΩ C T1, CT2 = 820ρF Stepper motor R T1 Phase1 R S1 C C1 R C1 E1 E2 C T2 R T2 Phase2 R S2 C C2 R C2 24V 47µF

Rev.1.0, Sep.19.2003, page 7 of 8 CAUTIONS (1) Be sure to short-circuit VCC1 and VCC2 before use. (2) When IC total output current changes greatly, e.g. when output current flows intermittently due to thermal protection operation, supply voltage may fluctuate. Provide power supply and wiring such that even in such a case amperage will not exceed absolute maximum rating. (3) Excessive power voltage fluctuations may cause unstable IC operation. To regulate such fluctuations, connect capacitor between terminals VCC and GND as close to IC terminal as possible. (Refer to application example.) (4) Thermal protection function

  • Thermal protection characteristics may differ depending on wiring layout. Be sure to test IC on circuit board before use. After circuit board is replaced, test IC again.
  • Circuit boards on which this IC mounted are designed such that impedance between power supply and output terminal will be kept low; therefore, IC output terminal may be short- circuited internally if excessive surge voltage is applied accidentally from outside. To prevent circuit board from burning in such a case, take safety measures such as installation of a fuse. (5) Flywheel diode This IC has built in flywheel diode to provide a return current route to motor. To prevent overheating and malfunction in operational areas where great current and voltage are applied, install a Schottky diode externally. For details, refer to “Area of Safe Operation” and “Application Example.”

Rev.1.0, Sep.19.2003, page 8 of 8 Package Dimensions SDIP28-P-400-1.78 Weight(g) — 2.2 JEDEC CodeEIAJ Package Code Lead Material Cu Alloy 28P4B Plastic 28pin 400mil SDIP Symbol Min Nom Max A b c E D L Dimension in Millimeters A1 0.51 —— — 3.8 — 0.35 0.45 0.55 0.9 1.0 1.3 0.22 0.27 0.34 27.8 28.0 28.2 8.75 8.9 9.05 — 1.778 — — 10.16 — 3.0 —— 0˚ — 15˚ —— 5.08 e 28 15 141 E c e1 A2 A1 bb1e LA SEA TING PLANE D

© 2003. Renesas Technology Corp., All rights reserved. Printed in Japan. Colophon 1.0 Keep safety first in your circuit designs! 1. Renesas Technology Corp. puts the maximum effort into making semiconductor products better and more reliable, but there is always the possibility that trouble may occur with them. Trouble with semiconductors may lead to personal injury, fire or property damage. Remember to give due consideration to safety when making your circuit designs, with appropriate measures such as (i) placem ent of substitutive, auxiliary circuits, (ii) use of nonflammable material or (iii) prevention against any malfunction or mishap. Notes regarding these materials 1. These materials are intended as a reference to assist our customers in the selection of the Renesas Technology Corp. product best suited to the customer's application; they do not convey any license under any intellectual property rights, or any other rights, belonging to Renesas Technology Corp. or a third party. 2. Renesas Technology Corp. assumes no responsibility for any damage, or infringement of any third-party's rights, originating in the use of any product data, diagrams, charts, programs, algorithms, or circuit application examples contained in these materials. 3. All information contained in these materials, including product data, diagrams, charts, programs and algorithms represents information on products at the time of publication of these materials, and are subject to change by Renesas Technology Corp. without notice due to product improvements or other reasons. It is therefore recommended that customers contact Renesas Technology Corp. or an authorized Renesas Technology Corp. product distributor for the latest product information before purchasing a product listed herein. The information described here may contain technical inaccuracies or typographical errors. Renesas Technology Corp. assumes no responsibility for any damage, liability, or other loss rising from these inaccuracies or errors. Please also pay attention to information published by Renesas Technology Corp. by various means, including the Renesas Technology Corp. Semiconductor home page (http://www.renesas.com). 4. When using any or all of the information contained in these materials, including product data, diagrams, charts, programs, and algorithms, please be sure to evaluate all information as a total system before making a final decision on the applicability of the information and products. Renesas Technology Corp. assumes no responsibility for any damage, liability or other loss resulting from the information contained herein. 5. Renesas Technology Corp. semiconductors are not designed or manufactured for use in a device or system that is used under circumstances in which human life is potentially at stake. Please contact Renesas Technology Corp. or an authorized Renesas Technology Corp. product distributor when considering the use of a product contained herein for any specific purposes, such as apparatus or systems for transportation, vehicular, medical, aerospace, nuclear, or undersea repeater use. 6. The prior written approval of Renesas Technology Corp. is necessary to reprint or reproduce in whole or in part these materials. 7. If these products or technologies are subject to the Japanese export control restrictions, they must be exported under a license from the Japanese government and cannot be imported into a country other than the approved destination. An y diversion or reexport contrary to the export control laws and regulations of Japan and/or the country of destination is prohibited. 8. Please contact Renesas Technology Corp. for further details on these materials or the products contained therein. Sales Strategic Planning Div. Nippon Bldg., 2-6-2, Ohte-machi, Chiyoda-ku, Tokyo 100-0004, Japan http://www.renesas.com Renesas Technology America, Inc. 450 Holger Way, San Jose, CA 95134-1368, U.S.A Renesas Technology Europe Limited. Dukes Meadow, Millboard Road, Bourne End, Buckinghamshire, SL8 5FH, United Kingdom Tel: <44> (1628) 585 100, Fax: <44> (1628) 585 900 Renesas Technology Europe GmbH Dornacher Str. 3, D-85622 Feldkirchen, Germany Tel: <49> (89) 380 70 0, Fax: <49> (89) 929 30 11 Renesas Technology Hong Kong Ltd. 7/F., North Tower, World Finance Centre, Harbour City, Canton Road, Hong Kong Tel: <852> 2265-6688, Fax: <852> 2375-6836 Renesas Technology Taiwan Co., Ltd. FL 10, #99, Fu-Hsing N. Rd., Taipei, Taiwan Renesas Technology (Shanghai) Co., Ltd. 26/F., Ruijin Building, No.205 Maoming Road (S), Shanghai 200020, China Renesas Technology Singapore Pte. Ltd. 1, Harbour Front Avenue, #06-10, Keppel Bay Tower, Singapore 098632 Tel: <65> 6213-0200, Fax: <65> 6278-8001 RENESAS SALES OFFICES