M54679SP

M54679SP RENESAS | Alldatasheet

Document overview

• Manufacturer or author: pROVIDED bY alldatasheet.com(free datasheet download site)
• PDF pages: 12

Technical content

Features

• Wide supply voltage sphere (10 to 35 V)
• Bipolar, constant current PWM function. (Topside transistors PWM function, maximum current is 0.8 Amps.)
• Few external components. (This IC can be operated with 1 capacitor and 2 resistances.)
• 4 phases input style (include the protection function of output through current).
• Output current charge function (2 bits, 4 type currents).
• Thermal protection circuit.
• Include flywheel diodes. Application
• Printer, PPC and Facsimile. Function The M54679SP is a semiconductor integrated circuit, which can drive to phase stepper motor. It can control the direction of motor current and output motor current (4 steps) by I0, I1 terminals. Also, it can drive the two-phase bipolar stepper motor by one IC as it includes two current control circuits. Block Diagram Vm1 Ph1A Ph1B Q R S Ph2A Ph2B QR S S1 Fref S2 VTM Rs1 Rs2 Out1B Out1A Out2A Out2B Vcc VTL VTHFrequency Generator Spike current cancel FF1 FF2 Current comp1 Current comp2 GND Source PWM Source PWM P.GND P.GND Spike current cancel Stby Standby P.GND Vm2 TSD Regout (3.5V) 1.25V 10K18K Vref I0(2) I1(2) I0(1) I1(1)

Rev.1.0, Sep.17.2003, page 2 of 11 Pin Configuration (Top View)

32 Shrink-DIP (32P4B)

P.GND GND Vm1 I1(1) I0(1) Stby Regout Ph2A Ph2B GND I1(2) I0(2) Fref Vm2 Rs2 Out2A Out2B N.C NC Pin Functions Symbol Terminal Function Vm1, Vm2 Motor supply voltage Power supply for motor driver. Out1A, Out1B, Out2A, Out2B, Output terminals Motor drive output terminals. Rs1, Rs2 Current sensor Output current sensing resistor (Rs) connection terminals. Vcc Power supply Control circuit power supply. Ph1A, Ph1B, Ph2A, Ph2B Phase input Output current direction switch terminals. I0(1), I1(1), I0(2), I1(2), Output current change Output curr ent change (100%, 70%, 31%, 0%) terminals. Stby Standby input Standby input (L: standby, H or Open: motor function) terminal. S1, S2 Sense inputs Input voltage terminal of comparators. Vref Vref input Reference voltage due to setting output current. Regout Output of voltage stabilizer Output of voltage st abilizer (Vout = 3.5 V). Fref A capacitor for oscillator A capacitor due to PWM carrier frequency. P.GND Power GND The GND terminal of bottom side flywheel diodes.

Rev.1.0, Sep.17.2003, page 3 of 11 Absolute Maximum Ratings (Ta = 25°C unless otherwise noted) Symbol Parameter Conditions Rating Unit Vm Motor supply voltage –0.3 to 37 V Iout Output current Per one phase ±0.8 A VCC Power supply –0.3 to 7.0 V Vlogic Logic input voltage Ph1A, Ph1B, Ph2A, Ph2B, I0, I1, stby –0.3 to Vcc V Vanalog Analog input voltage Vref S1, S2 –0.3 to Vcc V VRs Output current sensing Rs1, Rs2 1.5 V Pd Power dissipation 1.7 W Tj Junction temperature 150 °C Topr Operating temperature −20 to 75 °C Tstg Storage temperature −40 to 125 °C Thermal Derating Curve 01 0 2 0 3 04 0 5 0 Ambient Temperature Ta (°C) Power Dissipation Pd (W) 60 70 8 0 Al board 10 cm2 θc-a = 25°C/W( ) With a heat dissipation board θj-c = 25°C/W 2.5W 1.7W Simple substance (θc-a = 48.5°C/W) Recommended Operating Conditions Limits Symbol Parameter Min. Typ. Max. Unit Vcc Power supply 4.5 5.0 5.5 V Vm Motor supply voltage 10 — 35 V Iout Output current 50 — 800 mA tPLH Rising time of logic inputs — — 2.0 µs tPHL Falling time of logic inputs — — 2.0 µs Ton PWM ON time 5.0 — 50 µs Toff PWM OFF time 5.0 — 50 µs TSDon Thermal shut down — 160 — °C

Rev.1.0, Sep.17.2003, page 4 of 11

Electrical Characteristics

(Ta = 25°C, Vcc = 5 V, VM = 24 V unless otherwise noted.) Control circuit LimitsSymbol Parameter Conditions Min Typ Max Unit ICC1 Stby = H, Ph*A = H, Ph*B = L (Bridge ON) 39 56 73 ICC2 Stby = H, Ph*A = Ph*B (Bridge OFF) 20 27 40 ICC3 Supply current Stby = L (Standby condition) 1.5 4.0 6.5 mA Im12 Motor supply current (standby) Stby = L –10 0 100 µA VlogicH 2.4 — Vcc VlogicH Logic input voltage (Ph, I1, I0, Stby terminals) Note 0— 0 . 6 V I(PH)H Vin = 5 V — — 10 I(PH)L Phase terminal input current Vin = 0 V –20 –3.0 — µA I(I0, I1)H Vin = 5 V — — 10 I(I0, I1)L I0, I1 terminal input current Vin = 0 V –400 –300 — µA I(stby)H Vin = 5 V — — 10 I(stby)L Standby terminal input current Vin = 0 V –400 –300 — µA I(S) Current sensing comparators input current S1 or S2 terminals input current (S = 0 V, Vref = 5 V). –20 –3.0 — µA V(S) Current sensing comparators input voltage sphere S1 or S2 terminals input voltage sphere 0 — V CH(H) V I(Vref) Vref input current Input current of Vref (Vref = 5 V, I0 = I1 = 0 V) — 500 650 µA V(Vref) Vref input voltage sphere 0 — Vcc V FC Oscillation frequency of Fref C = 390 pF , Fref terminal oscillation 20 30 40 kHz Vreg Voltage stabilizer output Iout = –0.1 mA to +1 mA 3.35 3.50 3.65 V VCH(H) I0 = L, I1 = L, Vref = 5 V (Vref/10*100%) 475 500 525 mV VCH(M) I0 = H, I1 = L, Vref = 5 V (Vref/10*70%) 325 350 375 mV VCH(L) Current sensing comparators threshold voltage I0 = L, I1 = H, Vref = 5 V (Vref/10*31%) 139 155 171 mV Note: The logic reference voltage depends on the diode, and changes according to the temperature. Please consider the change in the temperature when setting the voltage level input to the logic.

Rev.1.0, Sep.17.2003, page 5 of 11 Output circuit (Ta = 25°C, Vcc = 5 V, VM = 24 V unless otherwise noted.) LimitsSymbol Parameter Conditions Min Typ Max Unit Vsat Output saturation voltage Top and Bottom at load current 0.6 A — 1.6 2.2 V Ileak Output leakage current –100 — +100 µA VF(H) VF of flywheel diode (top) If = 0.6A — 1.7 2.3 V VF(L) VF of flywheel diode (bottom) If = 0.6A — 1.1 1.5 V tdon Turn ON delay of output Ti me until output become ON since Fref = 2.5 V → 0.5 V —0 . 5 2 . 0 µS tdoff Turn OFF delay of output Ti me until output become OFF since Vref < S —2 . 0 3 . 5 µS tdstby OFF delay of standby Tim e until output become ON since Stby = L → H — 3.0 10.0 µS tdph Phase delay Time until output become ON since Phase = L → H — 3.0 10.0 µS Function Explanation (1) Ph inputs make a decision the output function. (Ph input of phase 4) Ph*A Ph*B Out*A Out*B LLO FF O FF HL HL LH LH HHO FF O FF *: 1 or 2 Note: The outputs shut off under Ph*A and Ph *B High condition at the same time. (2) Output current and terminal of output current setting. I0 I1 Output current ratio Current sensing comparators threshold voltage (Vref = 5 V) L L 100% 500 mV H L 70% 350 mV L H 31% 155 mV HH0 % —

Rev.1.0, Sep.17.2003, page 6 of 11 (3) Equivalent circuit of Vref terminal. The equivalent circuit of Vref terminal is shown in bellow circuit. As Vref terminal needs typical 500 µA input current, consider this value when Vref voltage is set. Vref 18K 3.5K 0.68K (4) Current sensing comparators. The current sensing comparators compare the voltage (V RS) of current sensing resistor and threshold voltage (VCH) of this comparators, then if VRS > VCH, the comparators output change and shut off the output. (5) Oscillation circuit. External capacitor (390 pF typ) is charged and discharged by the constant current and a triangular waveform (V TH (Fref terminal high voltage) = 2.5 V, VTL (Fref terminal low voltage) = 0.5 V) appears to Fref terminal. This triangular waveform is a carrier frequency of PWM circuit. The carrier frequency changes if this external capacitor value is changed. M54679SP is designed that the oscillation frequency is 30 kHz if the external capacitor value is 390 pF. The oscillation frequency is in inverse proportion to the value of an external capacitor. (6) Spike current cancellation. Output power transistors go to ON, then the spike current appears on the R S (current sensing) in a short time and this is caused by the internal delay time. M54679SP has the cancellation circuit of the spike current as the current sensing comparators do not cause error functions. So, the function of current sensing comparators is shut off during 2 µs since the output power transistors go to ON. (7) Ph signal delay circuit. M54679SP has a delay time of 3.0 µs until output H-bridge power stage go to ON since Ph signal change Low to high. This delay time is enough short time for the frequency (plus rate) of Ph signal and there is no problem in the normal function. (8) Rs and S1 or S2 terminal. If S1 or S2 terminal (non-inverted input of the current sensing comparators) is connected the nearest position of current sensing resistor, the error of the current sensing by means of wire resistance on the board will be decreased. (9) Voltage stabilizer. M54679SP has a voltage stabilizer of 3.5 V. The reference voltage (Vref) can connect the output (Regout) of voltage stabilizer directly. In this case, the current capability of the output of voltage stabilizer is 1.0 mA (source current), 0.1 mA (sink current).

Rev.1.0, Sep.17.2003, page 7 of 11 (10) Setting output current. As the output circuit of M54679SP is designed by the bipolar type NPN transistors, the current that go through the motor coil is smaller about 15 mA (typical) than the current that go through the current sensing resistor. This is caused by the base current of the power transistors. Therefore, be aware this base current when the output current is set. OFF ON OFFON RS Iout MB VM VCC MA Ib=15mA(Typ.) Iout =IRS - Ib (11) Power GND terminal. Power GND is connected the anodes of flywheel diodes of bottom side. When the output H-bridge power stage goes to ON, as the flyback current go through this GND terminal, minimize the wire resistor of this GND on the board.

Rev.1.0, Sep.17.2003, page 8 of 11 (12) Output current timing chart under Ph inputs and I0, I1 output conditions. Under output current waveforms show the current that a motor driver is going to control, so these do not show the actual current waveforms. The waveform of the current when motor is driven becomes a corrupted-curved waveform when the current changes due to the inductance of the motor. <4 steps function> (1) (2) (3) (4) Ph1A Ph1B Output current 1 (Current of Phase 1) Output current 2 (Current of Phase 2) A A B B Ph2A Ph2B L L 100% 100% 100% 100% A B B (2) (4) (1) (3) ABA B A B A B Torque vector Ph1A Ph1B Output current 1 (Current of Phase 1) Output current 2 (Current of Phase 2) A A B B Ph2A Ph2B <8 steps function> A B B A [1] [2] [3] [4] [5] [6] [7] [8] ABA B A B A B Ph1A Ph1B Output current 1 (Current of Phase 1) Output current 2 (Current of Phase 2) A A B B Ph2A Ph2B <16 steps function> A B B A ABA B A B A B 234 10 11 123456789 1 0 1 2 11 13 14 15 16 I0(1),I0(2) I0(1) I1(1) I0(2) I1(2) 31% 70% 100% 70% 100% 100% I1(1),I1(2) I0(1),I0(2) I1(1),I1(2)

Rev.1.0, Sep.17.2003, page 9 of 11 (13) Input terminal Symbol Equivalent circuit of the circumstance of input terminals Remarks Stby I0(1) I1(1) I0(2) I1(2) VCC Ph1A Ph1B Ph2A Ph2B VCC VCC S VCH Vref Vref I0(1) I1(1) VCC I0(2) I1(2) Fref VCC Fref

Rev.1.0, Sep.17.2003, page 10 of 11 Application Circuit Rrs2 Rrs1 input input input input Vcc Vm input input input 390pF input input 0.5 to 1.0 Ω 0.5 to 1.0 Ω Ph1A Ph1B Vref Vcc Rs1 Out1B Out1A P.GND GND Vm1 I1(1) I0(1) Stby Regout Ph2A Ph2B GND I1(2) I0(2) Fref Vm2 Rs2 Out2A Out2B N.C NC M Stepper Motor

Rev.1.0, Sep.17.2003, page 11 of 11 Package Dimensions SDIP32-P-400-1.78 Weight(g) — 2.2 JEDEC CodeEIAJ Package Code Lead Material Alloy 42/Cu Alloy 32P4B Plastic 32pin 400mil SDIP Symbol Min Nom Max A b c E D L Dimension in Millimeters A1 0.51 — — 0.35 0. 3.8 45 0.55 0.9 1.0 1.3 0.63 0.73 1.03 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 . 0 8 e 32 17 161 E c e1 A2 A1 b2bb1e LA SEATING PLANE D MMP

© 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