HA13568AT Hitachi Semiconductor, HA13568AT Datasheet - Page 13
HA13568AT
Manufacturer Part Number
HA13568AT
Description
CD-ROM Combo Driver
Manufacturer
Hitachi Semiconductor
Datasheet
1.HA13568AT.pdf
(22 pages)
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5. The PWM oscillation frequency fpwm is determined by the following equation.
6. The C103 to C105 for B-EMF filter are determined by the following equation.
7. The FCS and TRR is determined by the following equation.
8. The output voltage Vout of voltage regulator is determined by the following equation.
Where, Vhct3 : CT3 pin high voltage ( 3.3 V)
Where, Rfill
Where, R1
fpwm =
Voltage drive:
Gv =
Current drive:
Gm =
Vout = 3.3 1 +
Rflt No P
21
Rin + R2
((Rin + R2) Rs)
Vlct3 : CT3 pin low voltage ( 1.3 V)
No
R2
Rin
Rs
8 Ct3 Rt (Vhct3
R1
R1
: B-EMF detection output resistor (See the electrical characteristics)
: Maximum rotation speed (rpm)
: Resistor of IC inside ( 30k )
: Resistor of IC inside ( 7k )
: Resistor value inserted in the input ( )
: Current sense resistor ( )
Rr1
Rr2
(R110 to R113)
C103
Vrt
Vlct3)
Rflt No P
35
HA13568AT
13
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