33981 查看數據表（PDF） - Freescale Semiconductor
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33981 Datasheet PDF : 40 Pages
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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)
t ON
10
25
50
s
Output Rising Slew Rate
SRR
V/s
VPWR = 13 V, from 10% to 90% of VOUT, SR Capacitor = 4.7 nF,
RL= 5.0
8.0
16
35
Output Falling Slew Rate
SRF
VPWR = 13 V, from 90% to 10% of VOUT, SR Capacitor = 4.7 nF,
RL= 5.0
8.0
16
V/s
35
Output Turn-ON Delay Time(15)
VPWR = 13 V, SR Capacitor = 4.7 nF
t DLYON
ns
200
400
700
Output Turn-OFF Delay Time(16)
VPWR = 13 V, SR Capacitor = 4.7 nF
Input Switching Frequency(13)
Output PWM ratio at 60 kHz(17)
Time to Reset Fault Diagnosis
(overload on high side or external low side)
t DLYOFF
500
f PWM
–
R PWM
5.0
t RSTDIAG
100
1000
20
–
200
ns
1500
60
kHz
95
%
s
400
Output Over-current Detection Time
t OCH
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.
33981
10
Analog Integrated Circuit Device Data
Freescale Semiconductor
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