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SI-7330 数据表(PDF) 4 Page - Sanken electric |
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SI-7330 数据表(HTML) 4 Page - Sanken electric |
4 / 5 page 32 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 dis- sipation (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 tem- perature 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 85 °C (equivalent to max. ambient temperature) when operat- ing under actual conditions. * For details on thermal design, refer to the technical data. 80 60 40 20 0 Ambient temperature Ta (°C) 0 4 8 12 16 20 24 28 SI-7300A Derating curve No heatsink 100 ×50 ×2 100 ×100 ×2 SI-7300A Aluminium heatsink Using silicone grease Unit : mm SI-7330A Derating curve SI-7300A Aluminium heatsink Using silicone grease Unit : mm 0 5 10 15 20 25 30 80 60 40 20 0 Ambient temperature Ta (°C) 100 × 100 × 2 100 ×50 ×2 No heatsink Excitation signal input (Active low) TD62302P (Toshiba) (Open collector) PD VCC2 2.2 F 10V + 1 2 3 4 16 15 14 13 10k Ω Rx 2SC2002 9 8 510 Ω×4 A B A B 114 4 10 6 12 2 8 15 5 7 17 9 11 18 16 3 13 RSA RSB ZD VCC1 100 F 50V IO A B A B SPM + SI-7300A Method for measuring current SI-7300A A ICC1 A µ µ 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 9 8 7 6 5 4 3 2 1 0 SI-7300A Heat dissipation per phase vs. output current Output current Io (A/ ) 1 2 3 VCC1 1 40V 2 30V 3 20V Motor 3.6 Ω/ 9.0mH/ No load Excitation signal 1-phase, holding mode 16 14 12 10 8 6 4 2 0 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 SI-7330A Heat dissipation per phase vs. output current Condition VCC2=5V 1-phase, holding mode Motor Rm=0.85 Ω/ Lm=1.45mH/ Output current Io (A/ ) φ φ φ φ φ φ |
类似零件编号 - SI-7330 |
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类似说明 - SI-7330 |
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