DRV3204-Q1_15 Datasheet, PDF (23/38 Pages) Texas Instruments – Three-Phase Brushless Motor Driver

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DRV3204-Q1
SLVSBT3B – MARCH 2013 – REVISED JULY 2013
Table 7. Motor Current-Sense Electrical Characteristics
PARAMETER
CONDITIONS
MIN
VB = 12 V, T_A = -40°C to 125℃ (unless otherwise specified)
MOTOR CURRENT SENSE
VOfs
Input offset voltage
-5
VO_0
Output voltage, ALV
Imotor = 0 A, SPI register CSCFG. CSOFFSET
-
VLine
Linearity, ALV
VGain
Gain
Tset_TR1 ⁽¹⁾
Settling time (rise), ALV
±1%
Tset_TR2 ⁽¹⁾
Settling time(rise), ALV
±1%
Tset_TF1 ⁽¹⁾
Settling time(fall), ALV
±1%
Tset_TF2 ⁽¹⁾
Settling time(fall), ALV
±1%
OVADth
Overcurrent threshold
TDEL_OVAD Propagation delay
(1)
(rise or fall)
tfiltMTOC
filtering time
(1) Specified by design
Rshunt = 1 mΩ,
R11 = R12 = 1 kΩ,
R21 = R22 = 30 kΩ
Rshunt = 1 mΩ, VGain = 30, C_L = 100 pF,
Imotor = 0 A → 30 A,
(ALV: 1 V → 1.9 V, AREF = 1 V)
Rshunt = 1 mΩ, VGain = 30, C_L = 100 pF,
Imotor = 0 A → 100 A,
(ALV: 1 V → 4 V, AREF = 1 V)
Rshunt = 1 mΩ, VGain = 30, C_L = 100 pF,
Imotor = 30 A→0,
(ALV: 1.9 V → 1 V, AREF = 1 V)
Rshunt = 1 mΩ, VGain = 30, C_L = 100 pF,
Imotor = 100 A→0,
(ALV: .4 V → 1 V, AREF = 1 V)
Rshunt = 1 mΩ, VGain = 30, AREF = 1 V,
ADTH = 2.5 V, SPI register FLTCFG. MTOCTH,
OVADth = (2 × ADTH - AREF) / (Rshunt ×
VGain)
OSC1 = 9 MHz-11 MHz
29.4
10
-
-
-
-
119.7
-
0.8
TYP
MAX UNITS
5 mV
0.5
1
1.5
-V
2
2.5
30
30.6 mV/A
30
- V/V
1
2.5 µs
1
2.5 µs
1
2.5 µs
1
2.5 µs
133 146.3 A
-
1.5 µs
1
1.2 µs
ALV
ALFB/2
VCC
VO_0
VLine
=´Y/´X
´Y
´X
ADTH
0A
Imotor
0A
OVAD
Imotor
Figure 16. Motor Current Sense and Overcurrent
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