NJU7327 데이터 시트보기 (PDF) - Japan Radio Corporation

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NJU7327

Single-phase DC Brushless Motor Driver IC

Japan Radio Corporation  

NJU7327

Given that the bias current is set to be 5mA by HW101A datasheet, R1 and R2 can be determined as follows:

R1 +

R2 +

Rin

=

VDD

Ihbias

=

12

5 ×10−3

=

2.4kΩ

R1 = R2 = 1kΩ

The output voltage of hall elements is influenced by the bias current and magnetic flux density of hall elements.

The optimum input voltage of NJU7327 is 100mVp-p and higher. With such input voltage, the highest efficiency can

be obtained.

4. Design of FG output resistance (R3)

FG Out (FG: Pin8) is an open drain output and R3 is a pull up register. A typical value of R3 is 10kΩ.

The timing chart of FG Out is as follows.

Note that the pull up resistance shall be connected to below supply voltage.

Hall input

IN+

FG Terminal voltage

[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.

-7 -

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