M54687FP RENESAS | Alldatasheet

Document overview

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

Technical content

Features

  • Capable of controlling the speed in forward and reverse rotating directions
  • Capable of controlling the speed in high speed mode
  • Large output current drive (IO(max) =700mA)
  • Built-in clamp diode
  • Flat package (16P2N) Application Micro-cassette for phone-answering machine, AV equipment, and other general consumption appliances Function The M54687FP is an IC that can control the forward rotation, reverse rotation and speed of small DC brush motor. For the basic operation of this IC, output modes are selected, as shown in the logic truth table, by entering appropriate H/L level into the R, L and S inputs. Two resistances are put between the output pin and the PSC pin and the resistance ratios are appropriately adjusted to perform the speed control. In addition to the above, speed control can be done by varying the voltage at VR pin, in the high speed mode. Pin Configuration Outline 16P2N-A Power supply M54687FP NC: no connection PSC1 GND L-VCC PSC2 Speed control 1 R input S input L input Power supplySpeed control 2 Power supply Output 1 High speed control Output 2 125 116 107 R S L P-VCC O 1 VR GND NC O 2 P-VCC

Rev.1.0, Sep.19.2003, page 2 of 8 Logic Truth Table Input Output R L S O1 O2 Mode H H H H FG FF Forward rotation high speed governor H L H H G PLAY Forward rotation governor L H H FG H REW Reverse rotation high speed governor L L H G H REV Reverse rotation governor H H L L L BRAKE Brake operation L L L OFF OFF STB Standby mode output high imp. H L L    Reserved L H L   G: Governor control output mode FG: Rotating speed controllable with the voltage at VR pin (However, the precision is worse than G.) Block Diagram Reference voltage Output 2 High Speed control Power supply VCC GND Output 1 O 1 15 10 8 7 9 4 5 12 13 O 2 ( – ) VR Speed control 1 PSC1 Speed control 2 PSC2 Activation circuit Reference voltage Control circuit R input L input S input Constant voltage, Constant current 362 RL S ( – )

Rev.1.0, Sep.19.2003, page 3 of 8 Absolute Maximum Ratings (Ta = 25°C unless otherwise noted.) Parameter Symbol Ratings Unit Condition Power supply VCC –0.5 – +14 V Input voltage VI –0.5 – VCC V Output voltage VO –0.5 – VCC+2 V Allowable motor rush current IOP ±700 mA t ON ≤ 100ms, duty of 1% or less. Continuous output current IO ±200 mA However, Pd must not exceed the maximum rating. Power dissipation Pd 1.14 W When mounted in board Operating temperature Topr -20 – 75 °C Storage temperature Tstg -40 – 125 °C Power Dissipation Pd (W) Operating Temperature Ta (˚C) Thermal Derating (Absolute Maximum Rating) 2.0 When mounted in board 25 50 75 100 1.5 1.0 0.5 Recommended Operational Conditions (Ta = 25°C unless otherwise noted.) Limits Parameter Symbol Min. Typ. Max. Unit Supply voltage Vcc 6.0 9.0 13.0 V “H” input voltage VIH 2.0 Vcc V “L” input voltage VIL 0 0.4 V VR control voltage range* VR 0 Vcc V * : IO ≤ 200mA when FF/REW speed is controlled.

Rev.1.0, Sep.19.2003, page 4 of 8

Electrical characteristics

(Ta = 25°C, unless otherwise noted.) VI= 5.0V V V Limits Min. Typ. Max.Symbol Test conditions UnitParameter IO(leak) “L” output voltage 0.22 VCC = 14V, VO = 14V Standby mode 100 5.0 VCC-1.2 0.5 1.05 µA VOH VOL Vref “H” output voltage Output leak current Input current Supply current Governor characteristics (I) PLAY REV mode 0.95 1.0 1.71.2 0.1 0.02 0.2 µA II ICC1 ICC2 ICC3 ICC4 IB K Vref Vref / VCC K K / VCC Vref Vref / Ta / TaK K VrefII Vref Vref / Ta Vref Vref / IO / IOK K Vref Vref / IO Vref Vref / VCC IB IR Governor characteristics (II) FFREW Voltage characteristics FF/REW Output open Output open Output open PLAY/REV BRAKE STAND BY Reference voltage Bias current Current proportional constant Temperature characteristics Current characteristics VR input current Reference voltage Temperature characteristics Current characteristics Bias current Voltage characteristics K Vref K Vref K V ref IO = -200mA, VR = 5.0V IO = 200mA, VR = 0V, Vpsc = 2.5V FF / REW / BRAKE mode IO = 40mA VCC = 6.0 – 13V VCC = 6.0 – 13V IO = 40mA IO = 50 – 200mA IO = 50 – 200mA Ta = -20 – 75˚C Ta = -20 – 75˚C VR = 0.3V VR = 0.3V VCC = 6.0 – 13V VR = 0.3V IO = 50 – 200mA VR = 0.3V Ta = -20 – 75˚C VR = 0.3V VR = 0V 0.4 mA1.0 VCC-0.9 – 0.7 5.0 0.01 0.01 0.01 2.0 3.0 0.2 0.1 1.3 -5.0 0.7 1.8 -20 mA µA %/˚C %/mA %/V V %/˚C %/˚C %/mA %/V %/V %/mA 8.0 mA V mA mA mA 8.0 10.0

Rev.1.0, Sep.19.2003, page 5 of 8 Application Example When the normal speed is set to 2000rpm, and the high speed is set to 3500rpm Motor: Armature resistance Ra = 14 , Generation constant Ka = RT: The resistance of 300 is used for temperature compensation to take measures against hunting at low temperature. Install at a position close to the IC, if possible. 10µF∗ Reference voltage L-G ( – ) VR PSC1 PSC2 Activation circuit Reference voltage Control circuit R L S Constant voltage, Constant current P-G VCC M O 2O 1 VCC = 5.0V 20k RT 0.1µF RT 300 / / 5.6 k VCC = 9.0V RS Control signal ( – ) 3000 2.57

Rev.1.0, Sep.19.2003, page 6 of 8 Speed Control Method (1) Speed Control Method I (See the application circuit drawing.) For PLAY/REV Rotation number can be expressed by the following formula: RT+RS RT K Ka (1+ )+la( -Ra)} Where: Motor generation constant: Ka, Motor armature resistance: Ra, Rotation number: N K: Current proportional constant, IB: PSC pin bias current, Ia:motor current RT, RS: External resistance In addition, to set the rotation number with RS, external resistance RT is generally set as follows: RT ≤ K × Ra For FF/REW Note that the rotation number is basically controlled with the same expression as formula (1) but different reference voltage Vref and different bias current IB are to be used. However, Vref 5VR+0.5 (2) Speed Control Method II (to increase the motor rotation number) VCCVRPSC2PSC1 O 1 O 2 R L S L-G P-G Control signal M RS RT RT In the external circuit above, the voltage across motors is almost determined by the ratio of ‘RS+RT ’ to ‘RT ’ and, therefore, a value set for the voltage across motors is not so large. As method (1) of speed control I, the rotation number can be controlled. However, the following relations must be satisfied: RT → RT+RS RS+RT → RT

Rev.1.0, Sep.19.2003, page 7 of 8 (3) Speed Control Method III (to increase the precision of forward rotation and reverse rotation) Control signal VCCVRPSC2PSC1 O 1 O 2 R L S L-G P-G M RT1RS1 RS2RT2 The above two applications cannot make fine adjustments in forward rotation and reverse rotation (because the external resistance is shared with the forward rotation and reverse rotation). Fine adjustments can be made for each of forward rotation and reverse rotation if the external circuit is set as shown in the drawing above. This external circuit is also available to change the speed of forward and reverse rotation. The control method adopts the same formula as formula (1). However, the following relations must be satisfied: RT+RS → RS1 or RS2 RT → RT1 or RT2 CAUTIONS (1) Oscillation may take place with the setting of RT>K•Ra. Set R ≤ KRa. (2) Add a capacitor of 0.1µF to the portion between PSCs to reduce brush noise of the motor. (3) Add a capacitor of 10µF to the portion between VCC and GND to reduce brush noise and back electromotive noise of the motor. (4) At a low temperature, RT>KRa is set due to temperature characteristics of resistance Ra of the motor. When oscillation takes place, use resistance with a temperature coefficient for RT. (5) When the supply voltage is low, note that saturation of the output transistor of the IC may prevent the rotating speed for control. Taking into account motor noise etc., set constants in the following range. 2.0V V CC - (EC+Ia  Ra) = VCC - {RT  IB + Vref(1+ )+  Ia}RT RS RT K When the back electromotive force is large with the brakes applied, for example, malfunction may occur in internal parasitic Di. If flyback current of 1A or more flows, add Schottky Di to the portion between the output and the GND. When the IC is used at a high speed for PWM etc., note that switching of output results in delay of approx. 10µs.

Rev.1.0, Sep.19.2003, page 8 of 8 Package Dimensions MMP SOP16-P-300-1.27 Weight(g) JEDEC Code 0.2 Cu Alloy 16P2N-A Plastic 16pin 300mil SOP Symbol Min Nom Max A b c D E L y Dimension in Millimeters H E .350 .180 .010 .25 .57 .40 .271 .10 .81 .40 .20 .110 .35 .271 .87 .60 .251 .627 .20 .12 .50 .250 .210 .45 .18 .80 .10 b2 — 0.76 0˚ — 8˚ e 16 9 HE E D e y F A A2 A1 L c e b2 Recommended Mount Pad Detail FDetail G z x —Z1 0.605 0.755 0.25 z b x M G

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