LB1669 Ver la hoja de datos (PDF) - SANYO -> Panasonic

Número de pieza

componentes Descripción

Fabricante

LB1669

2-Phase Unipolar Brushless Motor Driver

SANYO -> Panasonic 

LB1669, 1669M

(4) Output protection function (C pin)

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.

For 1 µF lock detection time about 2 seconds

lock protection time (output ON) about 1 second

(output OFF) about 6 seconds

Rotation Output on

Lock

Output off

Output on

Output off

Lock released

Automatic Recovery Circuit C Pin Voltage

Rotation

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 × VIN.

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 drops to VTH2, the capacitor is charged to VTH1 again. (At this moment, the output is turned ON.)

These operations 2 and 3 are repeated at a cycle of approximately ton : toff = 1 : 6 to protect the motor.

4 If the lock is released when the C voltage drops to VTH2, the output is turned ON, starting rotation.

(5) Rotation detect signal (RD pin)

Open collector output (Drive mode: ‘‘L’’, Stop mode: ‘‘H’’)

(6) Radio noise reducing (pins B1 and B2)

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.

(7) Thermal shutdown function

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

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 December, 1996. Specifications and information herein are subject to change without notice.

No.3513-5/5

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