Bipolar Driver IC SI-7200M ■ Ratings (Ta = 25°C) Absolute maximum rating Supply voltage Output current (A) (V) Junction temperature (°C) Operating ambient temperature (°C) Storage temperature (°C) Type No. VCC1 V CC2 Io Tj Top Tstg SI-7200M 50 10 1.2 +125 –20 to +80 –30 to +100 ■ Characteristics Electrical characteristics Supply voltage (V) Type No. Excitation signal Power down Input current Input voltage Input Input voltage (mA) current (V) (V) (mA) VCC1 V CC2 IO I O1 I O2(Power down) V IL(ON) VIH(OFF) IIL VPD-L(OFF) V PD-H(ON) IPD-L I PD-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 SI-7200M 15 30 40 4.5 5 *Output current (mA) 5.5 200 1000 390 440 490 235 275 315 0 0.5 V CC2 V CC2 1.6 –0.4 +2 0 0.4 2 VCC2 1 2 Trigger pulse VCC2 Input Input Fre- input voltage time quency current (V) (µs) (kHz) (mA) Vtrig Ttrig Ftrig ICC2 min max min typ typ max max 3.5 VCC2 1.0 2.0 20 25 45 * IO1 : Measurement conditions shown in the external connection diagram IO2 : Measurement conditions shown in the external connection diagram with pin 9 open ■ Block diagram Auxiliary power supply VCC2 Trigger pulse generator circuit Power down Reference voltage Main power supply VCC1 Comparator amplifier Current controller M Power down Excitation signal (4-phase) Excitation signal amplifier Counter EMF canceller SI-7200M RS ■ External dimensions ■ Equivalent circuit diagram u w r y!2 !7 !5 !3 (Unit: mm) Plastic package !8 R1 Q1 Q2 R2 R3 Q3 65.0±0.5 Q4 R4 7.8±0.3 R21 R33 R35 R25 R40 R43 R42 !1 o R44 Q17 i R41 – + Q13 Q5 R29 R5 R6 R18 D5 D6 46 Q10 Q14 Q6 R30 R14 R10 I/C2/2 R37 R15 R11 Q11 R23 R34 R36 R27 R22 R26 – + D3 R7 R8 R19 D7 D8 Q15 Q7 R31 R16 D4 R20 Q12 R12 R24 Q16 Q8 R32 R28 2 – φ 4.5 Type No. Lot No. 3.8 P=2.54 21.6±0.5 I/C2/2 Pin No. R38 t e q : NC D2 7 R9 D1 Q9 R17 8.6±1 R13 R39 30.0±0.5 !0 4.5 59.0±0.4 !4 !6 21.6±0.5 1..................................18 0.5 2.5 SI-7200M ■ External connection diagram VCC-1 18 A A B B Excitation signal 7 6 12 13 9 10 Power down VCC-2 1kΩ VR44kΩ 78 42 555 VR 300Ω 4 A 17 B 5 11 5 1kΩ 14 IS1555 RSB 8 0.01µF SPM B 15 a 3 Equiva6 lent 1000pF A SI-7200M 2SA561 3.9kΩ 2 3 16 Power down pin : Active high Excitation signal pin : Active low I01, I02 measurement conditions Pin 1 : NC VCC–1 = 35V RSA VCC–2 = 5V RSA, RSB = 2.4Ω SPM : stepper motor Rating : R = 6.3Ω L = 15.5mH at 20°C *a : Trigger pulse for output current control Pulse width : 2 µs Frequency : 20 kHz ■ Supply voltage and output current = 2µs Motor Rm = 3.5Ω/φ Lm = 6.6 mH/φ Trigger pulse : Ttrig Ftrig = 20kHz Output current Io (A) 1.0 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) Motor Rm = 3.5Ω/φ Lm = 6.6 mH/φ 1.0 Motor = 103G – 775 – 1240 VCC = 30V l01 = IA 0.8 0.6 Trigger pulse Ttrig = 2µs Ftrig = 20kHz 0.2 0 20 40 60 80 100 Case (aluminum plate) temperature Tc (°C) 2 When using motor wiring AC.A. BC-B (A.B : open) AC BC 1.4 1.0 A 0.6 200 ph as e ex cit at ion A 500 B B 1000 ation 0.4 1- 1.8 e excit Pull-out torque (kg-cm) 2.2 2 phas Output current Io (A) ■ Torque and response frequency (Setting) ■ Output current and temperature 5000 Response frequency f (pps) 47 SI-7200M Application Note ■ Determining the output current IO (motor coil current) The output current, I O is fixed by the following circuit elements: RS : Current detection resistor VCC-2 : Auxiliary supply voltage Output current vs. Current detection resistor Based on the specifications of SI-7200M, its output current IO can be seen as: 1.4 To compute IO when different values are used for RS and V CC-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 I OH(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 20KΩ variable resistor across pins 8 and 11. Output current IOH1 (A) IO1 (effective value): 390 to 490mA 1.2 1.0 0.8 IOH 0.6 (ma x)5 IOH 0.4 V (min )5V 0.2 0 1 2 3 4 Current detection resistor Rs (Ω) IOH 0 Waveform of output current ■ Power down mode Power down output current vs. Current detection resistor Power down mode output current IOH2 (A) 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. 1.2 1.0 0.8 0.6 0.4 IOH2 (m ax)5V IOH2 (m 0.2 in)5V 0 0 1 2 3 Current detection resistor Rs (Ω) ■ 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 4 SI-7200M Application Note ■ 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 I O are measured at the maximum level of the supply voltage VCC. However, the motor is in holding mode at the 2-phase excitation. * For details on thermal design, refer to the technical data book SI-7200M (2) From the above measurements, the internal power dissipation (2phase) of the hybrid IC can be obtained through the following formula. Derating curve SL-7200M Aluminum heatsink Using silicone grease Unit : mm 16 2 PD = VCC x ICC –2I O (R L + RS) Where R L: 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. 1kΩ VR44kΩ 78 42 555 VR 300Ω 3 Equiva6 lent 1kΩ 1000pF 0.01µF A Power dissipation PD (W) × 50 A B SPM (6 °C /W ) tho 4 2 6 4 A × .5 Wi IO 17 ut he ats ink 2 B 15 a 0 5 11 5 0 SI-7200M 2SA561 3.9kΩ 2 10 8 VCC1 14 IS1555 RSB 8 3 0 20 40 60 80 Ambient temperature Ta (°C) RSA 16 a : Trigger pulse for controlling the output current Pulse width : 2µs Frequency : 20 kHz SI-7200M Power dissipation vs. Output current q 7 w e 6 Power dissipation PD/φ (W) VCC-2 7 6 12 13 9 10 ) Excitation signal A A (2-phase excitation) B B Power down 10 W 18 / °C 5.1 A ICC 12 2( Method for measuring the SI-7200M current 0× 10 (4) Verify that the temperature of the aluminum base plate of the hybrid IC or adjacent heatsink is below 85°C (equivalent to max. ambient temperature) when operating under actual load conditions. 0× 10 (3) The heatsink area corresponding to the ambient temperature can be obtained from the SI-7200M derating curve shown in the right. 14 5 4 3 VCC-1 q 40V w 30V e 20V Motor 6V 5Ω/φ 14mH/φ No load 2 1 0 0 0.2 0.4 0.6 0.8 1.0 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 Gasoline, Benzine and Kerosene (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 SHINETSU CHEMICAL INDUSTRIES CO., LTD. • YG6260 TOSHIBA SILICONE CO., LTD. • SC102 DOW CORNING TORAY SILICONE CO., LTD. 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