LA6587FA

PS No.A2044-5/5

Sample Application Circuit

*1 : When the breakdown protective DI at reverse connection is to be used, it is necessary to insert the capacitor Cr to

secure the regenerative current route. Similarly, Cr must be provided to enhance the reliability when there is no

capacitor near the fan power line.

*2 : To obtain Hall bias from VCC, carry out 1VCC bias as shown in the figure. Linear driving is made through

voltage control of the coil by amplifying the Hall output. When the Hall element output is large, the startup

performance and efficiency are improved. Adjustment of the Hall element can reduce the noise further.

*3 : To obtain Hall bias from the HB pin, carry out constant-voltage bias at about 1.5V, which enables the Hall

element to generate the stable Hall output satisfactory in temperature characteristics.

*4 : Keep this open when not using.

*5 : When the wiring from the Hall output to IC Hall input is long, noise may be carried through the wiring.

In this case, insert the capacitor as shown in the figure.

GND

VCC

FG

OUT1

OUT2

IN+

IN-

HB

*1

Di

Cr

*2

R1

*3

IN+

IN-

HB

*5

1/2FG

*4

*6

CT

H

H

On board element

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