la6581t Sanyo Semiconductor Corporation, la6581t Datasheet - Page 4

• Manufacturer Part Number: la6581t
• Description: Fan Motor Driver Btl Driver Single-phase Full-wave
• Manufacturer: Sanyo Semiconductor Corporation

Sample Application Circuit
*1 : When Di to prevent breakdown in case of reverse connection is used, it is necessary to insert a capacitor Cr to
*2 : To obtain Hall bias from V CC , carry out 1/2 × V CC bias as shown in the figure. Linear driving is made through
*3 : When the Hall bias is taken from the HB pin, constant-voltage bias is made with about 2.0V. Therefore, the Hall
*4 : Keep this open when not used.
*5 : When the wiring from the Hall output to IC Hall input is long, noise may be carried through the wiring. In this case,
secure the regenerative current route. Similarly, Cr is necessary to enhance the reliability when there is no
capacitor near the fan power line.
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.
element can provide the output satisfactory in temperature characteristics. Adjustment of the Hall output
amplitude is made with R1. (When V CC = 12V, the step *2 above proves advantageous for IC heat generation.)
insert the capacitor as shown in the figure.
This catalog provides information as of June, 2007. Specifications and information herein are subject
to change without notice.
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Elements in
substrate
*1
Di
*2
Cr
R2
R2
H
*5
LA6581T
HB
IN –
IN +
LA6581T
GND
V CC
OUT1
OUT2
FG
*4
*3
R1
H
PS No.A0706-4/4
HB
IN –
IN +