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SI-7321M Scheda tecnica(PDF) 1 Page - Sanken electric |
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SI-7321M Scheda tecnica(HTML) 1 Page - Sanken electric |
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1 / 19 page  SANKEN ELECTRIC CO., LTD. http://www.sanken-ele.co.jp/en/ SI-7321M Description The SI-7321M constant-current mode motor driver IC features efficient unipolar driver design for full- and half-step operation, and 1/4, 1/8, and 1/16 microstepping. The clock-in type input interface allows simplified control logic, with the flexibility of sequencer timing using either rising Clock edge only or both rising and falling edges. Additional flexibility is provided by user-configurable blanking time, and load circuit short or open protection (patents granted in Japan and the U.S.A.). Along with inputs for built-in sense current detection, these features minimize power losses. The device has a multi-chip internal structure for lower thermal resistance. The control IC (MIC) and the four power elements (MOSFET) are all separate ICs. The package (HSOP) provides wide output terminals at each corner, further enhancing device thermal dissipation. The built-in excitation distribution circuit (sequencer) allows motor control using only the Clock signal for simple operations (forward, reverse, hold), with motor speed control by frequency inputintoClockpin,androtationdirectioncontrolbyadedicated logic input. This eliminates logic signal lines required for conventional phase-input methods, and reduces demand on heavily-used CPUs. Low-power sleep mode, as well as reduced power during PWM off-time maximize energy savings. Features and Benefits ▪ Power supply voltage, VBB , 46 V maximum, 10 to 44 V normal operating range ▪ 18.6 × 9.9 mm package footprint ▪ Logic supply voltage, VDD , 3.3 to 5.5 V ▪ Maximum output current: 1.5 A ▪ Four NMOS output MOSFETs, RDS(on) = 0.25 Ω typical ▪ Built-in sequencer ▪ Simplified clock-in stepping control ▪ Full- and half-stepping and 1/4, 1/8, and 1/16 microstepping ▪ Surface mount type 44-pin molded package for automatic assembly and low profile ▪ Self-excitation PWM current control with fixed off-time ▪ Microstepping off-time adjusted automatically by step Unipolar 2-Phase Microstepping Motor Driver IC Functional Block Diagram Package: 44-pin HSOP surface mount Not to scale Continued on the next page… Sequencer and Sleep Circuit Synchro Control PWM Control OSC Comp + - DAC Pre- Driver PWM Control OSC DAC Pre- Driver Comp + - MIC Reg. 43 44 1 438 6 7 8 9 10 11 12 13 14 15 16 17 31 29 20 21 22 23 Protect Protect 41 2 3 40 5 27 18 19 28 39 30 32 33 34 35 36 37 24 26 25 42 28210.05 |
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