LA6585MC
www.onsemi.com
5
APPLICATION CIRCUIT
Figure 3. Sample Application Circuit
GND
V
CC
FG
OUT1
OUT2
IN+
IN−
HB
*1
Di
Cr
*2
On board element
H
R2
H
R1
*3
IN+
IN−
HB
*5
RD
*4
CT
*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 V
CC
, carry out bias to
V
CC
with resister R2 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 1.5 V, which enables
the Hall element to generate the stable Hall output
satisfactory in temperature characteristics.
Adjustment of the Hall output amplitude is made
with R1. (When V
CC
= 12 V, the step *2 above
proves advantageous for IC heat generation.)
*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.
ORDERING INFORMATION
Device Package Wire Bond Shipping
†
(Qty / Packing)
LA6585MC−AH SOIC−10 NB
(Pb−Free / Halogen Free)
Au wire 2,000 / Tape & Reel
LA6585MC−AH−M SOIC−10 NB
(Pb−Free / Halogen Free)
Au wire 2,000 / 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
.
