LV8111V_0910 SANYO [Sanyo Semicon Device], LV8111V_0910 Datasheet - Page 13

• Manufacturer Part Number: LV8111V_0910
• Description: For Polygon Mirror Motor 3-phase Brushless Motor Driver
• Manufacturer: SANYO [Sanyo Semicon Device]

11. Power Supply Stabilization
12. VREG Stabilization
13. Error Amplifier
14. IC Reverse Metal
15. SDCC (Speed Detection Current Control) function
Since this IC is used in applications that draw large output currents and adopts the drive method by switching, the
power-Supply line is subject to fluctuations. Therefore, capacitors with capacitances adequate to stabilize the
power-supply voltage must be connected between the V CC pin and GND. The ground-side a capacitor must be
connected as close to the GND2 pin of power GND as possible. If it is impossible to connect a capacitor (electrolytic
capacitor) near the pin, the ceramic capacitor of about 0.1μF must be connected as close to the pin as possible.
If diodes are inserted in the power-supply line to prevent IC destruction due to reverse power supply connection,
Since this makes the power-supply voltage even more subject to fluctuations, even larger capacitors will be required.
To stabilize the VREG voltage that is the power supply of the control circuit, connect a capacitor of 0.1μF or more.
GND of the capacitor must be attached as close to the control block GND (GND1 pin) of the IC as possible.
External components of the error amplifier block must be placed as close to the IC as possible to reduce influence of
noise.
Also, these components must be placed as separate from the motor as possible.
To improve heat radiation, the metal part on the reverse of IC is stuck fast to the substrate by using highly-conduction
solder.
The SDCC circuit controls the speed detection current. It limits the current to 87.5% of the specified current to reduce
acceleration of the motor when the rotation of the motor exceeds 95% of its target speed. This enables stabilized phase
lock pull-in and minimizes the variation in startup time.
The SDCC function is disabled by setting F/R low. It is enabled by setting F/R high or open.
Notes: If the selected state of SDCC does not match the rotational direction of the motor, it is necessary to solve the
problem by changing the HALL bias.
This catalog provides information as of February, 2009. Specifications and information herein are subject
This catalog provides information as of October, 2009. Specifications and information herein are subject
to change without notice.
to change without notice.
SANYO Semiconductor Co.,Ltd. assumes no responsibility for equipment failures that result from using
SANYO Semiconductor Co.,Ltd. assumes no responsibility for equipment failures that result from using
products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition
products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition
ranges, or other parameters) listed in products specifications of any and all SANYO Semiconductor Co.,Ltd.
ranges, or other parameters) listed in products specifications of any and all SANYO Semiconductor Co.,Ltd.
products described or contained herein.
products described or contained herein.
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SANYO Semiconductor Co.,Ltd. strives to supply high-quality high-reliability products, however, any and all
semiconductor products fail or malfunction with some probability. It is possible that these probabilistic failures or
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safety measures so that these kinds of accidents or events cannot occur. Such measures include but are not
limited to protective circuits and error prevention circuits for safe design, redundant design, and structural
limited to protective circuits and error prevention circuits for safe design, redundant design, and structural
design.
design.
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product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification" for the
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Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed
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above.
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LV8111V
PS No.A1416-13/13