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DRV10963 Datasheet(PDF) 16 Page - Texas Instruments

Part No. DRV10963
Description  DRV10963 5-V, Three-Phase, Sensorless BLDC Motor Driver
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

DRV10963 Datasheet(HTML) 16 Page - Texas Instruments

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DRV10963
SLAS955A – MARCH 2013 – REVISED JULY 2015
www.ti.com
The lower two pictures in Figure 14 illustrate how the AVS circuit in the DRV10963 device prevents this energy
from being returned to the supply. When the AVS condition is detected the DRV10963 device will act to turn on
the low side device designated as S6. This allows the current flowing in the motor inductance to be returned to
ground instead of being directed to the VCC supply voltage.
7.3.9 Control Advance Angle
To achieve the best efficiency it is often desirable to control the drive state of the motor so that the motor’s phase
current is aligned with the motor’s BEMF voltage.
To align the motor’s phase current with the motor’s BEMF voltage the inductive effect of the motor must be
considered. The voltage applied to the motor should be applied in advance of the motor’s BEMF voltage. This is
illustrated in Figure 16. The DRV10963 provides configuration bits (CTRL_ANG[4:0] )for controlling the time
(Tadv) between the driving voltage and BEMF. For motors with salient pole structures, aligning the motor BEMF
voltage with the motor current may not achieve the best efficiency. In these applications the timing advance
should be adjusted accordingly. This can be accomplished by operating the system at constant speed and load
conditions and by adjusting the Tadv until the minimum current is achieved.
Figure 16. DRV10963 Advance Angle Control
Table 8. Control Advance Angle Settings
CTRL_ANG[4:0]
Tadv
0
0
1
20 µs
2
40 µs
3
60 µs
n
n × 20 µs
6
120 µs
8
160 µs
31
620 µs
7.3.10 Overtemperature Protection
The DRV10963 contains a thermal shut down function which disables motor operation when the device junction
temperature has exceeded TSD. Motor operation will resume when the junction temperature becomes lower than
TSD - TSD_HYS.
7.3.11 Undervoltage Protection
The DRV10963 contains an undervoltage lockout feature, which prevents motor operation whenever the supply
voltage (VCC) becomes too low. Upon power up, the DRV10963 will operate once VCC rises above VUVLO_H.
The DRV10963 will continue to operate until VCC falls below VUVLO_L.
7.3.12 OTP Configuration
The DRV10963 features OTP (one time programmable) bits to allow for flexible configuration of the device in
order for optimization over a wide range of applications. Selection of various OTP options is described
throughout this specification. The DRV10963JJ, DRV10963JM, DRV10963JU, and DRV10963JA parts listed in
Table 10 are configured at the factory based on popular OTP settings for several different applications. TI
provides EVM hardware along with a special GUI and a Motor System Tuning Guide which provides detailed
instructions for determining the right part for your application. If your application requires settings not provided in
16
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Copyright © 2013–2015, Texas Instruments Incorporated
Product Folder Links: DRV10963


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