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| Bipolar Driver IC SI-7200M s Ratings Absolute maximum rating Type No. SI-7200M Supply voltage (V) VCC1 50 VCC2 10 Output current (A) Io 1.2 Junction temperature (C) Tj +125 Operating ambient temperature (C) Top -20 to +80 (Ta = 25C) Storage temperature (C) Tstg -30 to +100 s Characteristics Electrical characteristics Excitation signal Power down Input current Input voltage Input Input voltage (mA) current (V) (V) (mA) VCC1 VCC2 IO IO1 IO2(Power down) VIL(ON) VIH(OFF) IIL VPD-L(OFF) VPD-H(ON) IPD-L IPD-H min typ max min typ max min max min typ max min typ max min max min max max min max min max max max 15 30 40 4.5 5 5.5 200 1000 390 440 490 235 275 315 0 0.5 VCC2 VCC2 1.6 -0.4 +2 0 0.4 2 VCC2 1 2 Supply voltage (V) *Output current (mA) Trigger pulse VCC2 Input Input Fre- input voltage time quency current (V) (s) (kHz) (mA) Vtrig Ttrig Ftrig ICC2 min max min typ typ max max 3.5 VCC2 1.0 2.0 20 25 45 Type No. SI-7200M * IO1 : Measurement conditions shown in the external connection diagram IO2 : Measurement conditions shown in the external connection diagram with pin 9 open s Block diagram Auxiliary power supply VCC2 Main power supply VCC1 Trigger pulse generator circuit Reference voltage Comparator amplifier Current controller Power down Excitation signal (4-phase) Power down M Excitation signal amplifier Counter EMF canceller SI-7200M RS s Equivalent circuit diagram u !8 R1 Q1 Q2 R2 R3 Q3 Q4 R4 wr y!2 !7 !5 !3 s External dimensions (Unit: mm) Plastic package 65.00.5 59.00.4 4.5 7.80.3 !0 R39 R13 R9 R40 R43 !1 o R44 Q17 i R42 R41 - + D1 Q9 R17 Q13 Q5 R29 R5 R6 D2 R18 Q10 R14 R10 R22 R26 - + R15 R11 Q11 R23 R34 R36 R27 I/C2/2 R38 D3 R19 R7 R8 D4 R20 Q12 R16 R12 30.00.5 2 - 4.5 Type No. Lot No. 8.61 R21 R33 R35 R25 D5 D6 Q14 Q6 R30 D7 D8 Q15 Q7 R31 R24 Q16 Q8 R32 R28 7 3.8 P=2.54 21.60.5 21.60.5 1..................................18 0.5 2.5 I/C2/2 R37 Pin No. te q : NC !4 !6 46 SI-7200M s External connection diagram VCC-1 18 A Excitation signal VCC-2 VR44k 78 42 3 1k A A B B Power down 2SA561 3.9k 7 6 12 13 9 10 2 4 17 15 A B B SPM SI-7200M 11 5 14 RSB 3 16 I01, I02 measurement conditions Pin 1 : NC VCC-1 = 35V RSA VCC-2 = 5V RSA, RSB = 2.4 SPM : stepper motor Rating : R = 6.3 L = 15.5mH at 20C *a : Trigger pulse for output current control Pulse width : 2 s Frequency : 20 kHz VR 300 5 555 a IS1555 8 Equiva6 lent 1000pF 0.01F 1k Power down pin : Active high Excitation signal pin : Active low s Supply voltage and output current Motor Rm = 3.5/ Lm = 6.6 mH/ Trigger pulse : Ttrig = 2s Ftrig = 20kHz 1.0 Output current Io (A) Dotted lines indicate non-trackable 20 kHz chopping voltage 0.8 0.6 0.4 0.2 Increase in lo due to the effect of the trigger pulse width 0 16 20 24 28 32 36 40 Supply voltage VCC1 (V) s Output current and temperature s Torque and response frequency 1.0 Motor = 103G - 775 - 1240 VCC = 30V l01 = IA 2.2 Output current Io (A) Pull-out torque (kg-cm) 0.8 1- 2 1.8 ph When using motor wiring AC.A. BC-B (A.B : open) as e ex 0.6 AC BC cit at 1.4 ion 0.4 Trigger pulse Ttrig = 2s Ftrig = 20kHz 1.0 A A B B 0.2 0 20 40 60 80 100 0.6 200 500 1000 5000 Case (aluminum plate) temperature Tc (C) Response frequency f (pps) (Setting) Motor Rm = 3.5/ Lm = 6.6 mH/ 2 phas e excit ation 47 SI-7200M Application Note s Determining the output current IO (motor coil current) The output current, IO is fixed by the following circuit elements: RS : Current detection resistor VCC-2 : Auxiliary supply voltage Based on the specifications of SI-7200M, its output current IO can be seen as: IO1 (effective value): 390 to 490mA To compute IO when different values are used for RS and VCC-2, use the approximation formula below or the graph at the right. The maximum ripple value IOH of the output current waveform is within the IOH(MIN) ~ IOH(MAX) range shown by the following formulas: 1 . (0.247xVCC-2-0.03) [A] IOH(max) = . RS 1 . (0.225xVCC-2-0.024) [A] IOH(min) = . RS To fine-adjust the output current, connect a 20K variable resistor across pins 8 and 11. Output current IOH1 (A) 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 1 2 3 4 IOH IOH Output current vs. Current detection resistor (ma x)5 V (min )5V Current detection resistor Rs () IOH 0 Waveform of output current s Power down mode The SI-7200M can be operated in power down mode. By pulling up pin 9 to high level IO can be reduced to 60% of the motor rotation current. Power down output current vs. Current detection resistor Power down mode output current IOH2 (A) 1.2 1.0 0.8 0.6 0.4 0.2 0 0 1 2 3 4 IOH2 (m ax)5V IOH2 (m in)5V Current detection resistor Rs () s Operating voltage range The Sl-7200M can be used in applications (low coil resistance RL and high supply voltage VCC) where SI7200E and SI-7230E cannot be used. 48 SI-7200M Application Note s Thermal design Procedures for thermal design of SI-7200M are shown below. (1) As shown in the figure below, the supply current ICC and the output current IO are measured at the maximum level of the supply voltage VCC. However, the motor is in holding mode at the 2-phase excitation. (2) From the above measurements, the internal power dissipation (2phase) of the hybrid IC can be obtained through the following formula. PD = VCC x ICC -2IO (RL + RS) Where RL: Resistance of the motor coil between pins 2 and 4 and pins 15 and 17 Shown in the lower graph is a sample calculation of PD vs. IO. (3) The heatsink area corresponding to the ambient temperature can be obtained from the SI-7200M derating curve shown in the right. (4) Verify that the temperature of the aluminum base plate of the hybrid IC or adjacent heatsink is below 85C (equivalent to max. ambient temperature) when operating under actual load conditions. Method for measuring the SI-7200M current 14 0x 10 2 * For details on thermal design, refer to the technical data book SI-7200M Derating curve 16 SL-7200M Aluminum heatsink Using silicone grease Unit : mm 0x 10 12 2( Power dissipation PD (W) / C 5.1 10 10 W ) 8 0 x 50 x 2 (6 .5 C 6 Wi tho /W ) A 18 ICC VCC1 Excitation signal A A (2-phase excitation) B B Power down VCC-2 VR44k 78 42 3 7 6 12 13 9 10 2 4 17 15 A IO A 4 ut he ats ink A B B SPM 2 1k 2SA561 3.9k SI-7200M 11 5 14 RSB 3 16 RSA VR 300 5 555 a IS1555 8 Equiva6 lent 0 0 20 40 60 80 1000pF 0.01F 1k Ambient temperature Ta (C) a : Trigger pulse for controlling the output current Pulse width : 2s Frequency : 20 kHz SI-7200M Power dissipation vs. Output current q w 6 e 7 Power dissipation PD/ (W) 5 4 3 2 1 0 0 0.2 0.4 0.6 0.8 1.0 VCC-1 q 40V w 30V e 20V Motor 6V 5/ 14mH/ No load Output current IO (A) 49 SI-7200M, SI-7230M, SI-7115B, SI-7300A, SI-7330A, SI-7500A and SI-7502 Handling Precautions (Note: The SI-7502 is applicable for item (2) only.) For details, refer to the relevant product specifications. (1) Tightening torque: The torque to be applied in tightening screws when mounting the IC on a heatsink should be below 49N*m. (2) Solvent: Do not use the following solvents: Substances that Chlorine-based solvents : Trichloroethylene, dissolve the package Trichloroethane, etc. Aromatic hydrogen compounds : Benzene, Toluene, Xylene, etc. Ketone and Acetone group solvents Substances that weaken the package (3) Silicone grease: The silicone grease to be used between the aluminum base plate of the hybrid IC and the heatsink should be any of the following: * G-746 * YG6260 * SC102 SHINETSU CHEMICAL INDUSTRIES CO., LTD. TOSHIBA SILICONE CO., LTD. DOW CORNING TORAY SILICONE CO., LTD. Gasoline, Benzine and Kerosene Please pay sufficient attention in selecting silicone grease since oil in some grease may penetrate the product, which will result in an extremely short product life. Others * Resistance against radiation Resistance against radiation was not considered in the development of these ICs because it is assumed that they will be used in ordinary environment. 54 |
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