1 When a fan is rotating, the capacitor is charged at 3 µA (typ) and discharged through the C with pulses according to the

rotational speed.

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

These operations 2, 3 repeated on a cycle of approximately t on : t off=1:6 protect a motor.

4 If the lock is released when the C voltage drops to V

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

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:

2 Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on

SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees

jointly or severally.

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.

This catalog provides information as of November, 1997. Specifications and information herein are subject to change without notice.

Rotation

Output on

Output off

Output

on

Output off

Rotation

Lock

Lock release

Automatic return circuit C pin voltage

LB1663, 1663M, 1666

No. 2552- 6/6