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| Unipolar Driver ICs SI-7300A and SI-7330A s Ratings Absolute maximum rating Type No. SI-7300A SI-7330A Supply voltage (V) VCC1 48 42 VCC2 8 8 Output current (A) Io 1.7 3.2 Junction temperature (C) Tj +125 +125 Operating ambient temperature (C) Top -20 to +80 -20 to +80 (Ta = 25C) Storage temperature (C) Tstg -30 to +100 -30 to +100 s Characteristics Electrical characteristics Supply voltage Output current VCC2 input current Oscillation frequency External zener diode breakdown voltage (V) VZ min VCC1 +5 VCC1 max 70 43 (Ta = 25C) Input excitation signal (active high) Input voltage (V) High level input current (mA) Low High Io= Io= Io= Io= level level 0.5A/o 1.0A/o 1.5A/o 3.0A/o (OFF) (ON) VIL max 0.8 0.3 VIH typ 2.8 1.8 lIH lIH lIH lIH min max min max min max min max 2.2 10.0 3.0 10.0 4.9 10.0 5 100 15 100 40 100 (V) VCC1 Type No. SI-7300A SI-7330A VCC2 IO (mA/o) IOM* (mA) lCC2 max 45 45 min 19 19 (kHz) F typ max 21 21 25 25 min typ max min typ max min max min typ max 15 15 30 30 42 4.5 35 4.5 5 5 5.5 200 1500 535 580 625 5.5 200 3000 535 580 625 * Measurement conditions are as shown in the external connection diagram. s Block diagram SI-7300A Auxiliary power supply VCC2 Reference voltage RX Trigger pulse generator circuit Excitation signal amplifier Excitation signal (4-phase) Current detection resistor Rs Rx : Variable current resistor Counter EMF canceller Comparator amplifier Main power supply VCC1 Zener diode for cancelling counter EMF ZD Current controller M s External connection diagram SI-7300A VCC2 + 2.2F 10V 9 1 16 15 14 13 8 510x4 A B A B 4 10 6 1 14 8 15 A IO B 18 16 3 13 9 11 IOM measurement conditions VCC1 = 30V VCC2 = 5V RSA, RSB = 1.8 RX : Open SPM : Rm = 3.6/ : Lm = 9.0mH/ ZD : VZ = 60V B A F.C SI-7330A ZD + 100 F 50V VCC1 VCC2 + 2.2 F 10V 9 16 15 14 13 8 2 10k 82x4 A B 13 8 SI-7330A 1 16 ZDA ZDB + 100F 50V VCC1 IO A1 Excitation signal input (active low) 11 6 18 2 3 4 IO F.C 5 12 SI-7300A 7 17 2 SPM Excitation signal input (active low) B2 A3 B4 TD62302P (Toshiba) (Open collector) PD A9 B 4 A 12 10 15 IO B 7 5 A 10k Rx SPM B 2SC2002 RSA RSB TD62302P (Toshiba) (Open collector) PD RX 17 19 20 14 3 RSA RSB IOM measurement conditions VCC1 = 30V VCC2 = 5V RSA, RSB = 1.8 RX : Open SPM : Rm = 3.6/ : Lm = 9.0mH/ ZD : VZ = 43V 29 SI-7300 and SI-7330A s Equivalent circuit diagram SI-7300A 14 R1 Q1 R2 Q2 15 30.00.5 s External dimensions SI-7300A 65.00.5 59.00.4 2 - 4.5 Type No. Lot No. 7 (Unit: mm) Plastic package 7.80.3 17 D1 16 D2 8.61 4.5 8 D7 D8 D9 D10 3.8 P=2.54 21.60.5 21.60.5 * * * * * 2.5 0.5 11 9 D3 10 12 13 Q3 D4 Q4 5 7 D5 Q5 D6 6 Q6 4 3 1 Trigger pulse generator circuit Pin No. 1 * * * * 18 SI-7330A 69.00.5 63.00.4 Plastic package 7.00.5 3.5 R9 Q7 R13 R11 2 R3 R7 R5 + - R8 R15 R6 R4 Q8 R14 R10 35.00.5 16.6 3.4 8.61 + - R12 1.8 Type No. Lot No. 8.0 3.8 3 P=2.54 0.5 1.4 R16 18 Pin No. 12 20 s Supply voltage vs. Output current SI-7330A 16 Q10 Q1 R26 18 D1 19 11 10 12 9 13 14 Trigger pulse generator circuit SI-7300A 1.6 R1 R2 Q11 Q2 R27 15 17 6 D7 D8 D3 Q3 D4 Q4 D9 D5 Q5 D6 Q6 4 3 1 R9 Q7 R3 R7 R5 R15 R11 R13 + - + - 1.4 1.2 Output current IO (A/ ) D2 1.0 0.8 0.6 0.4 0.2 0 0 20 24 28 32 VCC2=5V Motor 23PM-C108 Rm=3.6/ Lm=9.0mH/ D10 7 5 8 R8 R6 R10 R4 Q8 R14 R12 2 36 40 R16 20 Supply voltage VCC (V) s Case temperature vs. Output current SI-7300A Output current Io (A) 1.2 1.1 1.0 0.9 0 0 20 40 60 80 100 VCC1 = 30V VCC2 = 5V Motor Rm = 3.6/ Lm = 9.0mH/ s Case temperature vs. Chopping frequency SI-7300A Chopping frequency F(KHz) 24 23 22 21 0 0 20 40 60 80 100 VCC1 = 30V VCC2 = 5V Motor Rm = 3.6/ Lm = 9.0mH/ Case temperature TC (C) Case temperature Tc (C) 30 SI-7300 and SI-7330A Application Note s Determining the output current IO (motor coil current) The output current, lo is fixed by the following circuit elements: RS : Current detection resistor VCC2 : Supply voltage RX : Variable current resistor To operate a motor at maximum current level, set Rx = infinity (open). Based on the specifications of SI-7300A, its output current lo can be seen as: lo (rms value): 535 to 625 mA To compute lo when different values are used for Rs and VCC2, use the approximation formula below. The maximum ripple value IOH of the output current waveform can be computed as follows: .1 (0.233*VCC2-0.026) [A] lOH(max) = . RS .1 (0.214*VCC2-0.021) [A] lOH(min) = . RS The graph of this equation is shown below. s Power down mode The SI-7300A can be operated in power down mode. The circuit is shown below. When transistor Tr is switched on, the reference voltage drops and the output current can be decreased. 2 Rx Tr SI-7300A SI-7300A Output current IOH vs. Variable current resistor RX 1.6 1.4 Output current IOH (A) 1.2 1.0 0.8 0.6 0.4 0.2 0 0 1 max R s = 0.7 min s = 1 max R min IOH Waveform of output current SI-7300A Output current IOH vs. Current detection resistor Rs 1.6 1.4 3 2 3 Variable current resistor Rx (k) 4 SI-7330A Output current IOH vs. Variable current resistor RX Rs = 0.3 Output current IOH (A) 1.2 1.0 0.8 0.6 0.4 0.2 0 0 1 2 3 Current detection resistor Rs () 4 Output current IOH (A) 2 Rs = 0.8 1 1.131 IOH(max) 1 Rs 4.843+ 4.9 VCC2 - 0.026 Rx IOH(min) 1 1.107 Rs 5.165+ 5.1 VCC2 - 0.021 Rx max min VCC 2=5 V 0 0 VCC 2=5 * Rx : k V 1 2 3 Variable current resistor Rx (k) 4 SI-7330A Output current IOH vs. Current detection resistor Rs 3 1 (0.233VCC2-0.026) Rs IOH(min) 1 (0.214VCC2-0.021) Rs IOH(max) s Example of a Frequency vs. Torque characteristic The graph shows the relationship between frequency and pull-out torque of SI-7300A. SI-7300A Pull-out torque out vs. Response frequency 5 Pull-out torque out (kg-cm) Output current IOH (A) 2 4 3 2 23PM-C108 VCC1=30V IO=1.2A/ Motor 1 1 (Fixed) 0 500 2-phase excitation VZ=60V 0 0 1 2 3 Current detection resistor Rs () 4 1000 5000 Response frequency f (pps) 31 SI-7300A and SI-7330A Application Note s Thermal design The procedures for the thermal design of the SI-7300A are as follows: (1) As shown in the right figure, the supply current ICC1 and the output current lo are measured at the maximum level of the supply voltage VCC1. However, the motor is in holding mode at the 2-phase excitation. (2) From the above measurements, the internal power dissipation (2 phases) of the hybrid IC can be obtained through the following formula. Pdiss = VCC1 * ICC1 - 2Io2(RL + RS) Where RL: coil resistance of the motor per phase Shown in the lower graphs are sample calculations of Pdiss vs. Io. (3) The heatsink area corresponding to the ambient temperature can be obtained from the SI-7300A derating curve shown in the lower right. (4) Verify that the temperature of the aluminum base plate of the hybrid IC or adjacent heatsinks is below 85C (equivalent to max. ambient temperature) when operating under actual conditions. * For details on thermal design, refer to the technical data. Method for measuring current SI-7300A VCC2 + 2.2 F 10V 9 1 16 15 14 13 8 510x4 A B A B 4 10 6 12 SI-7300A 2 18 16 3 13 9 11 1 ICC1 ZD 8 15 5 7 17 B B A A A SPM VCC1 A + 100 F 50V 14 IO Excitation signal input (Active low) 2 3 4 TD62302P (Toshiba) (Open collector) PD 10k Rx 2SC2002 RSA RSB SI-7300A Heat dissipation per phase vs. output current Heat dissipation per phase Pdiss (W) 9 8 7 SI-7300A Derating curve SI-7330A Derating curve 30 1 2 3 28 SI-7300A Aluminium heatsink Using silicone grease Unit : mm 25 SI-7300A Aluminium heatsink Using silicone grease Unit : mm Internal heat dissipation Pdiss (W) 6 5 4 3 2 1 0 0 VCC1 1 40V 2 30V 3 20V Internal heat dissipation Pdiss (W) 24 10 2 0x 10 2 0x x2 00 20 20 x2 00 10 0x 15 10 0x 15 0x 0x Motor 3.6/ 9.0mH/ No load Excitation signal 1-phase, holding mode 2 16 10 2 0x 10 15 10 0x 2 0x 10 0x 2 0.2 0.4 0.6 0.8 1.0 1.2 1.4 12 10 0x 5 Output current Io (A/ ) SI-7330A Heat dissipation per phase vs. output current Heat dissipation per phase Pdiss (W) 16 14 12 10 8 6 4 2 0 0 0.5 1.0 1.5 2.0 Condition VCC2=5V 1-phase, holding mode Motor Rm=0.85/ Lm=1.45mH/ 0x 10 10 2 0x 5 0x 2 8 No hea tsin k No hea tsin 5 4 k 0 0 20 40 60 80 0 0 20 40 60 80 Ambient temperature Ta (C) Ambient temperature Ta (C) 2.5 3.0 3.5 Output current Io (A/ ) 32 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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