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) (10)
tON
10
25
50
µs
Output Rising Slew Rate
SR
V/µs
R
V
= 13 V, from 10% to 90% of V
SR Capacitor = 4.7 nF,
SR Capacitor = 4.7 nF,
PWR
OUT,
OUT,
R = 5.0 Ω
L
8.0
16
35
Output Falling Slew Rate
SR
V/µs
F
V
= 13 V, from 90% to 10% of V
PWR
R = 5.0 Ω
L
8.0
16
35
Output Turn-ON Delay Time (11)
tDLYON
ns
ns
V
= 13 V, SR Capacitor = 4.7 nF
200
400
700
PWR
Output Turn-OFF Delay Time (12)
= 13 V, SR Capacitor = 4.7 nF
tDLYOFF
V
500
1000
20
1500
PWR
Input Switching Frequency (9)
Output PWM ratio @ 60kHz (13)
Time to Reset Fault Diagnosis
f
–
60
95
kHz
%
PWM
R
5.0
PWM
tRSTDIAG
µs
(over load on high side or external low side)
Output Over Current Detection Time
Notes
100
1.0
200
10
400
20
tOCH
µs
9. The MC33981 can work down (~100Hz). The fault management reset can not be guaranteed with PWM frequency lower than 5kHz
(INHS=0 during 200us typ)
10. Values for CBOOT=100nF. Refer to the paragraph entitled Sleep Mode on page 13. Parameter is guaranteed by design and not
production tested.
11. Turn-ON delay time measured from rising edge of INHS that turns the output ON to V
= 0.5 V with R = 5.0 Ω resistive load.
L
OUT
12. Turn-OFF delay time measured from falling edge of INHS that turns the output OFF to V
= V
-0.5 V with R = 5.0 Ω resistive load.
PWR L
OUT
13. The ratio is measured at Vout = 50% VPWR without SR capacitor. The device is capable of 100% duty cycle.
33981
Analog Integrated Circuit Device Data
Freescale Semiconductor
7
FREESCALE [ Freescale ]
