M63155FP Renesas Electronics Corporation., M63155FP Datasheet - Page 25
M63155FP
Manufacturer Part Number
M63155FP
Description
3 Phase Brushless Motor Controller
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.M63155FP.pdf
(41 pages)
- Current page: 25 of 41
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M63155FP
Rev.1.0, Sep.16.2003, page 25 of 40
Selecting switch point
for Hi-side FETs gate
Voltage of Phase U
Voltage of Phase V
Voltage of Phase W
M1 (mask signal)
For example:
If point-B is shorted GND, voltage(point-A) between external drain and source voltage reach to more than 1V
during turn-on.
So Drain-Source voltage monitor circuit senses voltage of point-A.
But this circuit can’t do perfect detecting shorted winding coil to GND.
Phase W
Off
Off
Q5
Q6
1.54 - 2.5uS
Off
Phase V
On
l
RS
Q3
Q4
Fig.20 Drain-Source voltage monitor of external FETs
VM
Fig.21 Timing of drain-source voltage monitor
On
Over load current
m
Q2
Q1
Monitoring timing
Off
A
Phase U
m
n
l
More than 1V
B
Drain-Source voltage monitor
Refer to Fig.21 on page 23
+
-
Vthds
>
moving
n
PWM is off
M1
At Point-e in Fig.22 on page 22
Braking
l
To FLT
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