33981B 查看數據表（PDF） - Freescale Semiconductor
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33981B Datasheet PDF : 37 Pages
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DYNAMIC ELECTRICAL CHARACTERISTICS
STATIC ELECTRICAL CHARACTERISTICS
DYNAMIC ELECTRICAL CHARACTERISTICS
Table 4. 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)(12)
t ON
10
25
50
μs
Output Rising Slew Rate
SRR
V/μs
VPWR = 13 V, from 10% to 90% of VOUT, SR Capacitor = 4.7 nF,
RL= 5.0 Ω
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 Ω
8.0
Output Turn-ON Delay Time(13)
VPWR = 13 V, SR Capacitor = 4.7 nF
t DLYON
200
Output Turn-OFF Delay Time(14)
VPWR = 13 V, SR Capacitor = 4.7 nF
t DLYOFF
500
Input Switching Frequency(11)
Output PWM ratio @ 60 kHz(15)
f PWM
–
R PWM
5.0
Time to Reset Fault Diagnosis
(overload on high side or external low side)
t RSTDIAG
100
16
400
1000
20
200
35
700
1500
60
95
400
V/μs
ns
ns
kHz
%
μs
Output Over-current Detection Time
t OCH
1.0
10
20
μs
Notes
11. The MC33981 can work down (~100Hz). The fault management reset can not be guaranteed with PWM frequency lower than 5.0 kHz
(INHS=0 during 200 μs typ)
12. Values for CBOOT=100 nF. Refer to the paragraph entitled Sleep Mode on page 13. Parameter is guaranteed by design and not
production tested.
13. Turn-ON delay time measured from rising edge of INHS that turns the output ON to VOUT = 0.5 V with RL= 5.0 Ω resistive load.
14. 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 Ω resistive load.
15. The ratio is measured at VOUT = 50% VPWR without SR capacitor. The device is capable of 100% duty cycle.
Analog Integrated Circuit Device Data
Freescale Semiconductor
33981
7
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