fs6989 Fortune Semiconductor Corporation, fs6989 Datasheet - Page 10

• Manufacturer Part Number: fs6989
• Description: Single-phase Full-wave Motor Driver
• Manufacturer: Fortune Semiconductor Corporation

Rev. 0.2
Fig8
Fig9
8.
Lock protection and auto-restart waveform
9.
Power dissipation versus temperature
There is no need of external timing capacitor for lock protection and auto-restart function.
This driver IC detects the rotation of the motor by hall signal, and control output on time
and off time by internal counters. The driver will be shut down roughly 1 ~ 3 seconds after
the motor is locked. When the drivers have been shut down, the automatic self-restart
circuit will try to power up the drivers every 1 ~ 3 seconds until lock is released.
The power dissipated by the IC varies widely with the supply voltage, the output current,
and loading. It is important to ensure the application does not exceed the allowable
power dissipation of the IC package. The recommended motor driver power dissipation
versus temperature is depicted as follows.
100
700
600
500
400
300
200
0
To use at temperature above Ta=25
0
25
Power Dissipation Temperature
Ambient Temperature ( ℃ )
50
75
100
℃
reduce 4.6mW/
125
150
℃
FS6989
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