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MC33981 Scheda tecnica(PDF) 10 Page - Freescale Semiconductor, Inc |
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MC33981 Scheda tecnica(HTML) 10 Page - Freescale Semiconductor, Inc |
10 / 40 page Analog Integrated Circuit Device Data 10 Freescale Semiconductor 33981 ELECTRICAL CHARACTERISTICS DYNAMIC ELECTRICAL CHARACTERISTICS DYNAMIC ELECTRICAL CHARACTERISTICS Table 5. Dynamic Electrical Characteristics Characteristics noted under conditions 6.0 V VPWR 27 V, -40 C TA 125 C, unless otherwise noted. Typical values noted reflect the approximate parameter mean at TA = 25 C under nominal conditions, unless otherwise noted. Characteristic Symbol Min Typ Max Unit CONTROL INTERFACE AND POWER OUTPUT TIMING (CBOOT, VPWR) Charge Blanking Time (CBOOT)(14) tON 10 25 50 s Output Rising Slew Rate VPWR = 13 V, from 10% to 90% of VOUT, SR Capacitor = 4.7 nF, RL= 5.0 SRR 8.0 16 35 V/ s Output Falling Slew Rate VPWR = 13 V, from 90% to 10% of VOUT, SR Capacitor = 4.7 nF, RL= 5.0 SRF 8.0 16 35 V/ s Output Turn-ON Delay Time(15) VPWR = 13 V, SR Capacitor = 4.7 nF tDLYON 200 400 700 ns Output Turn-OFF Delay Time(16) VPWR = 13 V, SR Capacitor = 4.7 nF tDLYOFF 500 1000 1500 ns Input Switching Frequency(13) fPWM – 20 60 kHz Output PWM ratio at 60 kHz(17) RPWM 5.0 – 95 % Time to Reset Fault Diagnosis (overload on high side or external low side) tRSTDIAG 100 200 400 s Output Over-current Detection Time tOCH 1.0 10 20 s Notes 13. The MC33981 fully operates down to DC. To reset a latched Fault the INHS pin must go low for the “Time to reset Fault Diagnosis” (tRSTDIAG). 14. Values for CBOOT=100 nF. Refer to Sleep Mode on page 16. Parameter is guaranteed by design and not production tested. 15. Turn-ON delay time measured from rising edge of INHS that turns the output ON to VOUT = 0.5 V with RL= 5.0 resistive load. 16. Turn-OFF delay time measured from falling edge of INHS that turns the output OFF to VOUT = VPWR -0.5 V with RL= 5.0 resistive load. 17. The ratio is measured at VOUT = 50% VPWR without SR capacitor. The device is capable of 100% duty cycle. |
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