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參數資料
| 型號： | THMC45 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 運動控制電子 |
| 英文描述： | BRUSHLESS DC MOTOR CONTROLLER, 0.25 A, PDSO8 |
| 封裝： | PLASTIC, HTSSOP-8 |
| 文件頁數： | 2/14頁 |
| 文件大小： | 157K |
| 代理商： | THMC45 |
PRODUCT PREVIEW documents contain information on new
products in the definition Phase. Characteristic data and other
data specifications are subject to change without notice. This
document is to be used for discussion only and should not be
used as the basis for any design.
thmc45.doc
Copyright
2000 Texas Instruments
!TI Strictly Private !
10
THMC45
SINGLE-PHASE 5VDC BRUSHLESS FAN DRIVER WITH SINGLE WIRE CONTROL INTERFACE
Product Preview
Locked Rotor Protection
An internal digital timer is used to monitor the output of the Hall sensor amplifier.
If a change in
commutation state is not observed via the hall comparator inputs within 1 second (typical), the OUTA
and OUTB outputs will be disabled for 8 seconds (typical). After the outputs have been disabled, the
THMC45 will re-enable the OUTA and OUTB outputs in order to automatically restart the motor after a
locked rotor condition. If the locked rotor condition still exists, the above process will repeat itself until
the locked condition is removed or the THMC45 is powered down (see Figure 3).
Figure 3: Typical Locked Rotor Protection Timing Waveforms
OUTA, OUTB
ENABLE
HALL SENSOR
COMPARATOR
OUTPUT
8s
1s
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