lb1663 Sanyo Semiconductor Corporation, lb1663 Datasheet - Page 6

• Manufacturer Part Number: lb1663
• Description: 2-phase Unipolar Brushless Motor Drivers
• Manufacturer: Sanyo Semiconductor Corporation

1 When a fan is rotating, the capacitor is charged at 3 µA (typ) and discharged through the C with pulses according to the
2 When a fan is locked, no discharge occurs through the C and the C voltage rises, turning OFF the output at 0.8 V
3 When the output is turned OFF, discharge occurs through the C at 0.44 µA (typ). If the lock is not released when the C voltage
4 If the lock is released when the C voltage drops to V
This catalog provides information as of November, 1997. Specifications and information herein are subject to change without notice.
rotational speed.
drops to V
These operations 2, 3 repeated on a cycle of approximately t on : t off = 1 : 6 protect a motor.
No products described or contained herein are intended for use in surgical implants, life-support systems,
aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like,
the failure of which may directly or indirectly cause injury, death or property loss.
Anyone purchasing any products described or contained herein for an above-mentioned use shall:
1 Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and
2 Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on
Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for
volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or
implied regarding its use or any infringements of intellectual property rights or other rights of third parties.
distributors and all their officers and employees, jointly and severally, against any and all claims and litigation
and all damages, cost and expenses associated with such use:
SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees
jointly or severally.
TH
2, the capacitor is charged to V
Rotation
Lock
Output on
Automatic return circuit C pin voltage
LB1663, 1663M, 1666
TH
1 again. (At this moment, the output is turned ON.)
Output off
TH
2, the output is turned ON, starting rotation.
Output
on
Output off
Lock release
Rotation
No. 2552- 6/6
IN
.