DRV3203E-Q1 Datasheet, PDF (24/39 Pages) Texas Instruments – Three-Phase Brushless Motor Driver

DRV3203E-Q1
SLVSCE5A – NOVEMBER 2013 – REVISED JANUARY 2014
Table 8. Motor Current-Sense Electrical Characteristics
PARAMETER
CONDITIONS
MIN
VB = 12 V, T_A = –40°C to +150℃ (unless otherwise specified)
MOTOR CURRENT SENSE
VOfs
Input offset voltage
–5
VO_0
Output voltage, ALV
Imotor = 0 A, SPI register CSCFG. CSOFFSET
-
Rshunt = 1 mΩ,
VLine
Linearity, ALV
R11 = R12 = 1 kΩ,
29.4
R21 = R22 = 30 kΩ
VGain
Gain
10
Tset_TR1 ⁽¹⁾
Settling time (rise), ALV
±1%
Rshunt = 1 mΩ, VGain = 30, C_L = 100 pF,
Imotor = 0 A → 30 A,
-
(ALV: 1 V → 1.9 V, AREF = 1 V)
Tset_TR2 ⁽¹⁾
Settling time(rise), ALV
±1%
Rshunt = 1 mΩ, VGain = 30, C_L = 100 pF,
Imotor = 0 A → 60 A,
-
(ALV: 1 V → 2.8 V, AREF = 1 V)
Rshunt = 1 mΩ, VGain = 30, C_L = 100 pF,
Tset_TF1⁽¹⁾ Settling time(fall), ALV ±1% Imotor = 30 A → 0,
-
(ALV: 1.9 V → 1 V, AREF = 1 V)
Rshunt = 1 mΩ, VGain = 30, C_L = 100 pF,
Tset_TF2⁽¹⁾ Settling time(fall), ALV ±1% Imotor = 60 A → 0,
-
(ALV: 2.8 V → 1 V, AREF = 1 V)
OVADth
Overcurrent threshold
Rshunt = 1 mΩ, VGain = 30, AREF = 1 V, ADTH = 1.98
V,
SPI register FLTCFG. MTOCTH, OVADth = (2 × ADTH --
89.1
AREF) / (Rshunt × VGain)
TDEL_OVAD Propagation delay
(1)
(rise or fall)
-
tfiltMTOC
filtering time
OSC1 = 9 MHz-11 MHz
0.8
(1) Specified by design.
ALV
ALFB/2
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TYP MAX UNITS
5 mV
0.5
1
-V
1.5
30 30.6 mV/A
30
- V/V
1 2.5 µs
1 2.5 µs
1 2.5 µs
1 2.5 µs
99 108.9 A
- 1.5 µs
1 1.2 µs
VCC
VO_0
VLine
=´Y/´X
´Y
´X
ADTH
0A
Imotor
0A
OVAD
Imotor
Figure 16. Motor Current Sense and Overcurrent
24
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