HA13558AFH Hitachi, HA13558AFH Datasheet - Page 11

• Manufacturer Part Number: HA13558AFH
• Description: CD-ROM Combo Driver
• Manufacturer: Hitachi

3. Determine this value using the following formula as a guideline. Vr1 is the VR1 (pin 7) voltage
4. Determine this value using the following formula as a guideline. Here, Vthsld is the SLD control
5. The SLD driver maximum output current Iosldmax is determined by the following formula. Here,
Cclk =
Also, the maximum spindle rotation speed depend on the Cclk as following figure.
Csld =
(See the electrical characteristics table.) and
upper and lower Vth. ( Vthclk is about 1.0 V)
circuit internal threshold voltage. (See the electrical characteristics table.)
Vsldcl is the current limiter reference voltage. (See the electrical characteristics table.)
Iosldmax =
16 • fclk • Rref • Vthclk
8 • Rref • Vthsld
toffsld • Vr1
Vsldcl
Rs
Vr1
8000
7500
7000
6500
6000
5500
5000
4500
4000
20
30
Cclk vs.Nmax
Cclk (pF)
40
Vthclk is the potential difference between the
50
Rref = 3.3 k
60
70
HA13558AFH
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