LV8806QA
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7
*4. [OSC]
Capacitor connection pin for setting boot frequency.
Make sure to connect a capacitor of 500pF to 2200pF (recommendation) between this pin and GND. The capacitor is required to
determine boot frequency to start motor.
How to define capacitance:
The capacitance should allow the shortest boot time for the target rotation count and less variation. The higher the capacitance is,
the more likely the variation occurs in boot time. On the other hand, the lower the capacitance is, the more likely an idling occurs.
Since an optimum value for OSC pin constant varies depends on motor characteristics and boot current, make sure to confirm the
constant when motor or circuit specification are changed.
*5. [RF]
Current limit setting pin.
When a pin voltage exceeds 0.265V, current limiter operates and the mode shifts to regeneration mode.
The calculation formula is as follows.
RF resistance value = 0.265V / desired current limit value
*6. [Pin protection resistor]
It is recommended that resistors higher than 1kΩ are connected serially to protect pins against misconnection such as GND open
and reverse connection.
*7. [Resistor for pseudo midpoint]
Delta connector motor does not have midpoint. Therefore, we need to create a pseudo midpoint by external resistor. Please note
that the amplitude of BEMF signal generated during motor rotation varies depends on motor types. Some motors require the
external pseudo midpoint and others do not.
*8. [FG, RD pull-up resistor]
Since FG and RD are open-drain output, make sure to use pull-up resistors.
It is recommended that the pull-up resistor is approximately 10kΩ.
ORDERING INFORMATION
Device Package Shipping (Qty / Packing)
LV8806QA-MH
UQFN16 (2.62.6)
(Pb-Free / Halogen Free)
3000 / Tape & Reel
† For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel
Packaging Specifications Brochure, BRD8011/D. http://www.onsemi.com/pub_link/Collateral/BRD8011-D.PDF
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