ha13561f Renesas Electronics Corporation., ha13561f Datasheet - Page 15

• Manufacturer Part Number: ha13561f
• Description: Combo Spindle & Vcm Driver
• Manufacturer: Renesas Electronics Corporation.

8. The delay time t
9. The differential voltage (Vctl – V
Vsd2 = 1 +
Vhys2 = 1 +
t
where,
DLY
for Vps
where, Vth3, Vth4: Threshold voltage on pin 37 and pin 76 [V] (= 1.39)
Shut down voltage Vsd1, Vsd2 can be designed by the following range.
Vsd1
where, Vth4: Threshold voltage on pin 38 [V] (= 1.4)
Vctl – V
where, D
To be satisfied with above equation (15), it is notice that the ratio of R6 to R7 must be choosen as
If you choose the R// << R3, then equation (17) can be simplified as following equation.
R8
R7
LSB, MSB as follows.
(17)
shown below.
H
=
H
FLT
FLT
=
1 + s • C5 • R// – C3 • (R// + R3) •
+ s
= 2 •
+ s
C106 • Vth5
(s)
(s) =
3
2
4.25 [V], Vsd2
REF1
• C3 • C4 • C5 • R// • R3 • R4
Vhyspm:
I
H
I
CH3
• C5 • C4 • R// • (R3 + R4) – C5 • C3 • R// • R3 •
R// =
R6
R5
CH3
PWM
FLT(S)
1 +
R103
R104
:
R103
R104
= 2 • V
:
•
1
:
R7 • R8
R7 • R8
Charge current on pin 38 [ A] (= 10)
1 –
s
DLY
O
Duty cycle on PWMIN [%]
Transfer function from pin 62 (PWMOUT) to pin 64 (Vctl) as shown in equation
1
• Vth3
R6
R5
of POR for power on reset is determined as follows.
REF1
• Vhyspm
•
Hysteresis voltage on pin 37 and pin 76 [mV] (= 40)
1 +2 • •
10 [V]
•
D
PWM
[s]
100
1
REF1
– 50
s
n
) using for control of VCM driver depend on PWMDAC inputs
[V]
[V]
+
•
R6
R5
R6
R5
s
n
+ C4 • (R// + R3 + R4)
15
1
2
• H
FLT
(s)
R6
R5
+ C3 • C4 • R4 • (R// + R3)
HA13561F
(12)
(13)
(14)
(15)
(16)
(18)
(19)
(17)