DRV10963 Datasheet, PDF (8/14 Pages) Texas Instruments – 5-V, THREE PHASE, SENSORLESS BLDC MOTOR DRIVER

DRV10963
SLAS955 – MARCH 2013
www.ti.com
Figure 2. Motor Start Procedure
LOCK DETECTION
If the motor is stalled during running, the lock detection algorithm will be triggered after T_{ON_LOCK}. The DRV10963
will immediately stop driving the motor for T_{OFF_LOCK}. The DRV10963 will then attempt to drive the motor again.
If the motor is stalled from a stationary condition, the lock detection algorithm will be triggered after the system
goes into close loop as illustrated in the Motor Start Procedure figure. After the part transitions into closed loop
the lock condition will be detected and the DRV10963 will immediately stop driving the motor for T_{OFF_LOCK}. The
DRV10963 will then attempt to drive the motor again. If the lock condition still exists, the DRV10963 will re-enter
the next lock protection cycle until the lock condition is removed.
CURRENT LIMIT
The DRV10963 provides an internal current limit function. The output voltage (duty cycle) is limited such that the
motor phase current does not exceed I_LIM. When the current limit function is active the duty cycle output will not
be controlled by the PWM input duty cycle.
SHORT CIRCUIT CURRENT PROTECTION
The DRV10963 contains internal short circuit current protection circuitry. It is triggered when motor phase current
exceeds I_SHT. The circuit will temporarily disable the output voltage. When the motor phase current drops below
I_SHT, the DRV10963 will attempt to restart the motor.
ANTI VOLTAGE SURGE (AVS)
The DRV10963 includes circuitry to prevent the motor from transferring energy back into the power supply. This
can typically happen when the PWM input duty cycle suddenly decreases or the motor is suddenly shut down
due to lock protection or thermal protection.
OVER TEMPERATURE PROTECTION
The DRV10963 contains a thermal shut down function which disables motor operation upon detecting the device
junction temperature has exceeded T_SD. After the junction temperature has lowered approximately T_{SD_HYS}°,
motor operation will resume.
8
Submit Documentation Feedback
Product Folder Links: DRV10963
Copyright © 2013, Texas Instruments Incorporated