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DRV10963 Datasheet(PDF) 9 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) 9 Page - Texas Instruments

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Example: Minimum Duty Cycle = 10%
Output Average Amplitude
90%
VCC
13%VCC
Input Duty
10%VCC
5%VCC
0
5% 10%
1.5%
13%
Input Duty
Output Duty
0
10%
10%
Optional Transfer Functions:
(13%, 10%, 5%, no limit)
DRV10963
www.ti.com
SLAS955A – MARCH 2013 – REVISED JULY 2015
Feature Description (continued)
Figure 4. PWM Command Input Controls the Output Peak Amplitude
Figure 5. Example of PWM Command Input Controlling the Output
The transfer function between the PWM commanded duty cycle and the output peak amplitude is adjustable in
the DRV10963 device. The output peak amplitude is described by Equation 1 when PWMcommand > minimum
operation duty cycle. The minimum operation duty cycle can be set to either 13%, 10%, 5% or no limit by OTP
setting (MINOP_DC[1:0]). Table 1 shows the optional settings for the minimum operation duty cycle. When the
PWM commanded duty cycle is lower than minimum operation duty cycle and higher than 1.5%, the output will
be controlled at the minimum operation duty cycle. When the input duty cycle is lower than 1.5%, the DRV10963
device will not drive the output, and enters the standby mode. This is illustrated in Figure 6.
Table 1. Minimum Operation Duty Cycle
MINIMUM OPERATION DUTY
MINOP_DC[1:0]
CYCLE
0
0 (no limit)
1
5%
2
10%
3
13%
Figure 6. Speed Control Transfer Function
7.3.2 Spin up Settings
DRV10963 starts the motor using a procedure which is illustrated in Figure 7.
The motor start profile includes device configurable options for open loop to close loop transition threshold
(HOffth), align time (TAlign), and accelerate rate (RAcc).
Copyright © 2013–2015, Texas Instruments Incorporated
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