DRV8308_15 Datasheet, PDF (9/60 Pages) Texas Instruments – DRV8308 Brushless DC Motor Controller

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DRV8308
SLVSCF7A – FEBRUARY 2014 – REVISED OCTOBER 2014
Electrical Characteristics (continued)
over operating free-air temperature range (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MOSFET DRIVERS
V_OUTH
V_OUTL
High-side gate drive output voltage
Low-side gate drive output voltage
I_O = 100 μA, VM ≥ 12V
I_O = 100 μA
IDRIVE = 000
IDRIVE = 001
IDRIVE = 010
I_OUT
Peak gate drive current
IDRIVE = 011
IDRIVE = 100
IDRIVE = 101
IDRIVE = 110
IDRIVE = 111
CYCLE-BY-CYCLE CURRENT LIMITER
V_LIMITER
Voltage limit across R_ISENSE for the current
limiter
OCPDEG = 00
t_BLANK
Time that V_LIMITER is ignored, from the start of ^{OCPDEG = 01}
the PWM cycle
OCPDEG = 10
OCPDEG = 11
PROTECTION CIRCUITS
V_SENSEOCP
Voltage limit across R_ISENSE for overcurrent
protection
OCPTH = 00
V_FETOCP
Voltage limit across each external FET’s drain ^{OCPTH = 01}
to source for overcurrent protection
OCPTH = 10
OCPTH = 11
OCPDEG = 00
t_OCP
Deglitch time for V_SENSEOCP or V_FETOCP to
trigger
OCPDEG = 01
OCPDEG = 10
OCPDEG = 11
V_UVLO
VM undervoltage lockout
VM rising
VM falling
V_OVLO
VM overvoltage lockout
VM rising, OVTH = 0
VM rising, OVTH = 1
t_RETRY
T_TSD
Fault retry time after RLOCK or OTS
Thermal shutdown die temperature
RETRY = 1
LRTIME = 00
t_LOCK
Locked rotor detect time
LRTIME = 01
LRTIME = 10
LRTIME = 11
V_CPFAIL VCP failure threshold (CPFAIL bit)
MIN
TYP
VM + 10
10
10
20
30
50
90
100
110
130
0.225
0.25
2
3
3.75
6
1.7
1.8
200
250
400
500
600
750
850
1000
1.6
2.3
3
5
8
7.8
32
34.5
28
5
150
160
1
3
5
10
VM + 3
MAX UNIT
V
V
mA
0.275 V
µs
1.9 V
400
600
mV
850
1200
µs
V
36
V
29
s
°C
s
V
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