HA13705 Hitachi Semiconductor, HA13705 Datasheet - Page 19

• Manufacturer Part Number: HA13705
• Description: IPIC Intelligent Power IC High Side Solenoid Driver
• Manufacturer: Hitachi Semiconductor

8. The delay time of the power monitor for start up is as follows.
9. The cut off frequency fcpwm of the filter for current control input of the spindle motor is as
10. To get the maximum driving efficiency for spindle motor, the capacitor C101, C102 should be
11. To stabilize output voltage od retract driver, the capacitor C115 should be chosen as following
12. Time t
where, please set the value of C101, C102 so that C101 < C102 can be kept including the
where, Vthb
and, please select capacitor C112 and C116 that the ratio of C112/C116 is more than 3 times,
tpor = 140 C105
fcpwm =
C101 = 0.8 C102
C102 =
C115 =
t
follows.
chosen as following equation.
accuracy of the absolute value to assure the stability of motor starting and speed lock state.
equation. Please chose same values for C115.
capacitor C112, C116 as following equation.
because the last voltage of BRK and BRKDLY terminals falls if the value of C116 is big for C112,
and effect of brake goes down.
BRKDLY
BRKDLY
fbemf
V
Vpss
=
2
tan( /6)
2
2
BRK0
of the delayed brake of V, W phase for retract is determined by resistor R109 and
C116 R109
1 +
13k
(R105 // R106)
= Vpss – 0.7 [V]
20k C103
3 10
1
: Back EMF frequency at standard rotation speed of the spindle motor [Hz]
C116
C112
: Threshold voltage that output MOS transistor of spindle motor driver is
: +12 V power supply for spindle motor driver
operated.
fbemf
6
1
[ms]
ln 1
[Hz]
[F]
V
[F]
Vthb
BRK0
1 +
C116
C112
[s]
(15)
(16)
(17-1)
(17-2)
(18)
(19)
HA13614FH
19