HA13609ANT Datasheet, PDF (19/31 Pages) Hitachi Semiconductor – Three-Phase Brushless Motor Driver

HA13609ANT
7. The table below lists reference values for the stabilization capacitors C103 and C104 for the
crystal oscillator element according to the frequency used.
X’tal (MHz)
C103, C104 (pF)
4 to 6
≈ 20 to 40
6 to 8
≈ 10 to 20
Use a resonance resistance of under 50Ω as a criterion for selecting the crystal element used.
8. Include these components if required.
9. The cutoff frequency of the filter formed by C110 and R121 should be between 3 and 10 times
the PWM oscillator frequency.
10. The gain, G_CTL, from the error amplifier input to R_NF is given be the following formula:
G_CTL = 1 +
Rif
R125
11. The formulas below determine the relationship between capacitor C108, which sets the power on
reset (POR) delay time, and the resistors R126 and R127, which set LVI.
V_LVI = V_SD
1+
R126
R127
[V]
However, V_LVI > 3V
V_HYS = R126 · I_HYS
[V]
However, V_LVI – V_HYS > 2.5V
t_POR = 0.052 × 10⁶ · C108 [sec]
The time t_POR is the time required for the oscillator to reach stability. This time should be 20ms or
longer.
V_LVI
V_HYS
V_SD, I_HYS: See the electrical characteristics.
V_SS
< 2.0 V
0V
POR
0V
2.0 V
1.3 V
RST
t_POR
t_POR
0V
When using an external reset input to set the IC to the standby state, pin 20 must be set to a low
level that is under 0.4V.
12. When the Hall inputs are common mode input, the open circuit protection circuit makes the
output transistors non-operational. When all the Hall input phases are open, the lower side
output transistors become non-operational.
The output transistors will be disabled if one or two phases are disconnected (become open) only
when the Hall inputs are common mode.
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