LB1872 데이터 시트보기 (PDF) - SANYO -> Panasonic
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LB1872 Datasheet PDF : 11 Pages
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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.
Therefore, capacitors with adequate capacitances for stabilization must be inserted between the VDD and ground pins.
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.
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:
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:
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.
This catalog provides information as of January, 1998. Specifications and information herein are subject to
change without notice.
PS No. 5625-11/11
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