LB1669M Sanyo, LB1669M Datasheet - Page 5

• Manufacturer Part Number: LB1669M
• Description: 2-Phase Unipolar Brushless Motor Driver
• Manufacturer: Sanyo

(4) Output protection function (C pin)
(5) Rotation detect signal (RD pin)
(6) Radio noise reducing (pins B1 and B2)
(7) Thermal shutdown function
This catalog provides information as of December, 1996. Specifications and information herein are subject to change without notice.
Capacitor pin used in forming an automatic recovery circuit. If rotation is stopped due to overload, the pin voltage level
increases and then forces the output to become inactive. In this case, after proper load adjustment, the output returns to the
‘drive’ mode from the ‘stop’ mode automatically. By changing the capacitor value, the lock detect time period can be set.
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
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
4 If the lock is released when the C voltage drops to V
Open collector output (Drive mode: ‘‘L’’, Stop mode: ‘‘H’’)
These are the base pins for Darlington connected output transistors.
If radio noise is a problem, add a capacitor of 0.01 to 0.1µF or less.
Shutdown the driver output in case of coil short-circuiting and abnormal IC heating.
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
2 Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on SANYO
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.
rotational speed.
voltage drops to V
These operations 2 and 3 are repeated at a cycle of approximately t
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:
ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally.
For 1 µF
Rotation
lock detection time about 2 seconds
lock protection time (output ON) about 1 second
TH
Lock
2, the capacitor is charged to V
Output on
(output OFF) about 6 seconds
Automatic Recovery Circuit C Pin Voltage
Output off
LB1669, 1669M
TH
TH
1 again. (At this moment, the output is turned ON.)
2, the output is turned ON, starting rotation.
Output on
on
Output off
: t
Lock released
off
= 1 : 6 to protect the motor.
Rotation
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V
IN
.