NJM2606D 데이터 시트보기 (PDF) - Japan Radio Corporation

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NJM2606D

LOW VOLTAGE DC MOTOR CONTROLLER

Japan Radio Corporation  

■ TYPICAL APPLICATION

NJM2606 / 2606A

The voltage applied at the motor is set as VM, which brings the following formula.

VM

=

(R1

+ R2

+ R3 ) Iref

+ R1･IM

+ Iref

K

Now that, Iref = Vref / R2 so that,(Iref ≒100µA setting is appropriate)

VM

=

Vref

R2

(R1

+

R1

K

+ R2

+ R3 )+

R1

K

IM Λ

Λ

(1)

On the other hand, the voltage applied at the motor itself will be as in the following.

VM = EO + RM･IM Λ Λ (2)

Through (1), (2), and then leading to stabilize the control system.

RM･IM

>

R1

K

･IM

∴R1 < K･RM Λ Λ (3)

Taking in consideration of deviations, R1(MAX) < K(MIN)･RM(MIN) with the condition.

Items required checking in regard to the temperature coefficient

IC items

1. Reference voltage : Temperature coefficient of Vref.

2. Current Ratio : Temperature coefficient of K

*1 External component items

3. Temperature coefficient of R1, R2 and R3

The relation among these 3 parts takes the very important roll.

4. Temperature coefficient of motor internal resistance

5. Temperature coefficient of motor generative voltage

6. Temperature coefficient ratio of R1 and RM

Count up from 3.4.

[CAUTION]

The specifications on this databook are only

given for information , without any guarantee

as regards either mistakes or omissions. The

application circuits in this databook are

described only to show representative usages

of the product and not intended for the

guarantee or permission of any right including

the industrial rights.

Ver.2003-12-09

-5-

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