LB1409 Просмотр технического описания (PDF) - SANYO -> Panasonic

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производитель

LB1409

Level Meter Driver for 9 LEDs

SANYO -> Panasonic 

Sample Application Circuits

(All with offset adjustment)

. Circuit not using Vref 2

LB1409

Adjusting procedures

1. Turn the center of 10 kΩ VR largely to 4.7 µF

capacitor side.

2. Input AC signal of 50/u2 mV from AC IN.

3. Adjust 1 kΩ VR so that the output at OUT becomes

500 mV DC.

Equation used in the calculation of R to be inserted

in series with LED.

Gain : 20 dB

R (red) = (VCC – 2.5) / 6 kΩ

R (green) = (VCC – 2.8) / 18 kΩ

. Circuit using Vref 2

Unit (resistance: Ω, capacitance: F)

Adjusting procedures

. R to be inserted in series with LED is as follows

irrespective of VCC.

R (red) = 360 Ω (Approx. 6 mA)

R (green) = 100 Ω (Approx. 18 mA)

. TR1 should be chosen with PC considered; and the

following transistors are recommended.

Red LED drive 2SD400

Green LED drive 2SD325

Unit (resistance: Ω, capacitance: F)

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

No.683-4/4

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