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MC34920EIR2 Scheda tecnica(PDF) 9 Page - Freescale Semiconductor, Inc |
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MC34920EIR2 Scheda tecnica(HTML) 9 Page - Freescale Semiconductor, Inc |
9 / 29 page Analog Integrated Circuit Device Data Freescale Semiconductor 9 34920 ELECTRICAL CHARACTERISTICS DYNAMIC ELECTRICAL CHARACTERISTICS DYNAMIC ELECTRICAL CHARACTERISTICS Table 4. Dynamic Electrical Characteristics Characteristics noted under conditions 21 V ≤ VVB+ ≤ 42 V, TA = 10°C to 55°C, TJ max = 135°C, VCC = 5.25 V max unless otherwise noted. Typical values noted reflect the approximate parameter mean at TA = 25°C under typical conditions unless otherwise noted. Characteristic Symbol Min Typ Max Unit SERIAL INPUT PORT TIMING Serial Clock Frequency fCLK – 4.0 12 MHz SCLK High Width tCLH 41.667 125 – ns SCLK Low Width tCLL 41.667 125 – ns Delay CS Falling to First SCLK Rising tCS-SCLK 83.333 250 – ns Delay Last SCLK Rising Edge to CS Rising tSCLK-CS 83.333 250 – ns Data Valid to SCLK Set-Up Time tDSU 41.667 125 – ns Data Hold Time tDHD 41.667 125 – ns SDI Rise Time tRD 5.0 – 10 ns SDI Fall Time tFD 5.0 – 10 ns SCLK Rise/Fall Time tRFC 5.0 – 10 ns CS Off-Time (tDHD + tDSU) tNCS-OFF 83.333 250 – ns V1 AND V2 VOLTAGE REGULATORS Clock Frequency Overtemperature fOP 175 200 225 kHz V1 Duty Cycle V1_DC 35 37.5 40 % V2 Duty Cycle V2_DC 80 82.5 85 % BIPOLAR CURRENT REGULATED STEP MOTOR DRIVE SYSTEM Shoot-Through Delay tDEAD 15 200 350 ns Off-Time tOFF 20 29 38 µs Current Blanking Time tBLANK 300 – 750 ns DC MOTOR DRIVE SYSTEM PWM Frequency TA = 25°C fPWM – 20 21 kHz Shoot-Through Delay tDEAD 15 180 350 ns Overcurrent Off-Time tOC_OFF 10 40 70 µs |
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