NJU7346 New Japan Radio Co.,Ltd, NJU7346 Datasheet - Page 7

• Manufacturer Part Number: NJU7346
• Description: Nju7346 Single-phase Dc Brushless Motor Driver Ic
• Manufacturer: New Japan Radio Co.,Ltd

3. Design of FG output resistsnce (R3)
be obtained.
of FG Out is as follows.
Given that the bias current is set to be 5mA by HW101A datasheet, R1 and R2 can be determined as follows:
The output voltage of hall elements is influenced by the bias current and magnetic flux density of hall elements.
The optimum input voltage of NJU7346 is 100mVp-p and higher. With such input voltage, the highest efficiency can
FG Out(FG:Pin2) is a open drain output and R3 is a pull up register. A typical value of R3 is 10k . The timing chart
Note that the pull up resistance shall be connected to below supply voltage.
R
R
1
1
FG Terminal voltage
R
R
2
2
Rin
1
k
Hall input
Ihbias
V
IN+
DD
5
12
10
3
2
4 .
k
[CAUTION]
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.
The specifications on this databook are only
NJU7346
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