HA13609ANT Datasheet, PDF (16/31 Pages) Hitachi Semiconductor – Three-Phase Brushless Motor Driver

HA13609ANT
Set C3 and derive the integration constants from following formulas.
R6 = 0 Ω
R3 = ¹
ω_P · C3
R5 = ^R3
G_(E)
C4 =
1
2 · R5 · ωo
R7 = R5
Next, determine R4 to match the phase of PLL OUT.
R4 =
(3.46 – V_P) R3
(V_P – 1.2) – (1.9 – V_P) · R3 / R5
Here, V_P : See the electrical characteristics.
When log ω_P/ω_M is greater than 2, a phase advance to compensate for this phenomenon is
required. Use the following formula to set the phase advance;
C5
·
R8
>
20 · 2
ω_P
R4
DIS
R6 R7
R8
PLL
C4
R5
C5
4. The following formulas determine the stuck rotor protect detection time t_LP (detects the current
limiter operating time), the output off time t_OFF, and the setup time t_set. The figures show the
operating waveforms.
t_LP =
∆V1
Isink
· C105 ≈ 0.09 × 10⁶ · C105
t_OFF =
∆V2
Isource
· C105 ≈ 0.32 × 10⁶ · C105
t_set =
V_LH2
Is
· C105 ≈ 0.0005 × 10⁶ · C105
[sec]
[sec]
[sec]
See the electrical characteristics for the definitions of ∆V1, ∆V2, Isink, Isource, and Is.
Standby
(MD0k to 2 = Low)
Enable
Current limiter
operation
I_RNF
0
Lock
protect
pin
V_LH1
V_LH2
V_LL
t_LP
t_OFF
∆V1 ∆V2
t_LP
0
t_set
Output off
Note that a capacitor with a leakage current sufficiently smaller that Isource must be used for
C105.
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