PS No. 5625-11/11

LB1872

stipulate the speed error when the LD output is on, this must be determined based on the result of a speed

measurement for the motor state.

This IC includes a built-in circuit that masks LD output chattering (rapid switching between on and off) during phase

lock pull-in. The mask time is determined as shown below by the capacitance of the capacitor inserted between the

CLD pin and ground.

t = 0.35

× C

t: Mask time (s)

C: External capacitance (µF)

If LD chattering is masked, the LD output is delayed by the mask time. Therefore care is required, since the speed

error when LD is on is changed by the mask time.

Leave the CLD pin open if there is no need for masking.

7. Power supply stabilization

Since this IC provides large output currents, it can easily cause fluctuations in the power supply line voltage.

If diodes are inserted in the power supply lines to prevent device destruction by reverse power supply connection, the

power supply line voltage becomes especially liable to fluctuations. In this case, even larger capacitors are required.

8. External protection circuits

If an application will include external motor constraint protection and other external protection circuits, use an open

collector transistor output to set the FC pin low to shut off the IC drive current.

This catalog provides information as of January, 1998. Specifications and information herein are subject to

change without notice.

s 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.

s Anyone purchasing any products described or contained herein for an above-mentioned use shall:

ΠAccept 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:

 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.

s 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.