DRV10987 Datasheet, PDF (47/69 Pages) Texas Instruments – DRV10987 12- to 24-V, Three-Phase, Sensorless BLDC Motor Driver

www.ti.com
8.5.3.4 MotorKt Register (address = 0x03) [reset = 0x00]
DRV10987
SLVSE89 – AUGUST 2017
15
MotorKt[15]
R-0
7
MotorKt[7]
R-0
14
MotorKt[14]
R-0
6
MotorKt[6]
R-0
Bit Field
15:0 MotorKt[15:0]
Figure 45. MotorKt Register
13
MotorKt[13]
R-0
12
MotorKt[12]
R-0
11
MotorKt[11]
R-0
10
MotorKt[10]
R-0
9
MotorKt[9]
R-0
8
MotorKt[8]
R-0
5
MotorKt[5]
R-0
4
MotorKt[4]
R-0
3
MotorKt[3]
R-0
2
MotorKt[2]
R-0
1
MotorKt[1]
R-0
0
MotorKt[0]
R-0
Table 13. MotorKt Register Field Descriptions
Type
R
Reset
0x00
Description
16-bit value indicating the motor measured velocity constant.
Ktc (V/Hz) = {MotorKt[15:0]} / 2 / 1090
8.5.3.5 MotorCurrent Register (address = 0x04) [reset = 0x00]
Figure 46. MotorCurrent Register
15
Reserved
R-0
14
Reserved
R-0
13
Reserved
R-0
12
Reserved
R-0
11
Reserved
R-0
10
MotorCurrent[1
0]
R-0
9
MotorCurrent[9]
R-0
8
MotorCurrent[8]
R-0
7
6
5
4
3
2
1
0
MotorCurrent[7] MotorCurrent[6] MotorCurrent[5] MotorCurrent[4] MotorCurrent[3] MotorCurrent[2] MotorCurrent[1] MotorCurrent[0]
R-0
R-0
R-0
R-0
R-0
R-0
R-0
R-0
Bit
15:11
10:0
Field
Reserved
MotorCurrent[10:0]
Table 14. MotorCurrent Register Field Descriptions
Type
R
R
Reset
0
0x00
Description
Do not access these bits.
11-bit value indicating the motor current.
Current (A) = 3 × (MotorCurrent[10:0] –- 1023) / 2048
8.5.3.6 IPDPosition–SupplyVoltage Register (address = 0x05) [reset = 0x00]
Figure 47. IPDPosition–SupplyVoltage Register
15
IPDPosition [7]
R-0
14
IPDPosition [6]
R-0
13
IPDPosition [5]
R-0
12
IPDPosition [4]
R-0
11
IPDPosition [3]
R-0
10
IPDPosition [2]
R-0
9
IPDPosition [1]
R-0
8
IPDPosition [0]
R-0
7
SupplyVoltage[
7]
R-0
6
SupplyVoltage[
6]
R-0
5
SupplyVoltage[
5]
R-0
4
SupplyVoltage[
4]
R-0
3
SupplyVoltage[
3]
R-0
2
SupplyVoltage[
2]
R-0
1
SupplyVoltage[
1]
R-0
0
SupplyVoltage[
0]
R-0
Table 15. IPDPosition–SupplyVoltage Register Field Descriptions
Bit Field
15:8 IPDPosition [7:0]
7:0 SupplyVoltage[7:0]
Type
R
R
Reset
0x0
0x0
Description
8-bit value indicating the estimated motor position during IPD
plus the IPD advance angle (see Table 7)
8-bit value indicating the supply voltage
V_POWERSUPPLY (V) = SupplyVoltage[7:0] × 30 V / 255
For example, SupplyVoltage[7:0] = 0x67,
V_POWERSUPPLY (V) = 0x67 (102) × 30 / 255 = 12 V
Copyright © 2017, Texas Instruments Incorporated
Product Folder Links: DRV10987
Submit Documentation Feedback
47