HA13614FH Datasheet, PDF (10/26 Pages) Hitachi Semiconductor – Combo (Spindle & VCM) Driver

HA13614FH
Timing Chart
Power on Reset (1)
Vsd
Vpss, Vss
and Vdd
Vhys
t
POR
12VGOOD
t_por
1.0V
*2
*2
Max
0
t
Note: 1. Please refer to external components table about how to determine the threshold voltage
Vsd and delay time t_por.
2. Operation for Vss.
Figure 4 Operation of the Power Monitor (1)
Power on Reset (2)
Vpss, Vss
or Vdd
t_por
t_por
POR
<1µs
<1µs
,,,,,,,, ^12VGOOD
Spindle ^ON
Driver _OFF
VCM ^ON
Driver _OFF
Retract
Driver
Retract
Note: This retract driver requires the electrical power from B-EMF of spindle motor.
Figure 5 Operation of the Power Monitor (2)
10