Driving circuit for a two-phase DC brushless fan motor

Details Driving circuit for a two-phase DC brushless fan motor Driving circuit for a two-phase DC brushless fan motor

2006-08-15

2006-08-15

Ip, Paul (Department: 2837)

Electricity: motive power systems

Automatic and/or with time-delay means

Responsive to thermal conditions

C318S268000, C318S434000, C700S300000, C361S033000

Reexamination Certificate

active

07091689

ABSTRACT:
The present invention is a driving circuit for a two-phase DC brushless fan motor comprises a control unit, a Hall element, a motor and a motor protection circuit, an MOS element, a reverse protection circuit and a temperature control circuit. By sensing the running temperature of the motor by the temperature sensor and feeding it back to the motor and offering proper current as tied in with a current limiting resistor, thermal shutdown will not happen.

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“LB1868M; Two-Phase Brushless Fan Motor Driver, Monolithic Digital IC.” Sanyo Electric Co., Ltd. Semiconductor Company. Tokyo Bld., 1-10, 1 Chrome, Ueno, Taito-ku, Tokyo, 110-8534 Japan. 83100RM(KI) No. 6203; Aug. 2000.
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“LB1860, 1860M, 1861, 1861M; Variable Speed Fan Motor Driver, Monolithic Digital IC.” Sanyo Electric Co., Ltd. Semiconductor Company. Tokyo Bld., 1-10, 1 Chrome, Ueno, Taito-ku, Tokyo, 110-8534 Japan. 73096HA(II)/4060TA, TS No. 3519; Jul. 1996.
“LB1863M, 1869M; Two-Phase Unipolar Brushless Motor Driver, Automatic Recovery Type . . . ” Sanyo Electric Co., Ltd. Semiconductor Company. Tokyo Bld., 1-10, 1 Chrome, Ueno, Taito-ku, Tokyo, 110-8534 Japan. 13097HA (OT) No. 4043; Jan. 1997.

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