Renesas RL78/G1F User Manual page 15

RL78/G1F Motor Driver Board GB01
8.3 Output Voltage Detection Circuit
The inverter board integrates a circuit used to input the bus line voltage and 3-phase output voltage (U-
phase, V-phase, and W-phase) to the A/D pins of the microcontroller via a resistance voltage divider. The
equation (2) below shows the relationship between the 3-phase output voltage, bus line voltage, and
detection voltage.
Figure 8-5 Schematic Diagram of Output Voltage Detection Circuit
8.4 Voltage Generation Circuit
This board generates the voltage of 12V and 5V from the main power supply (24V).
Input Voltage
Item
12V generation 24
5V generation 12
R12UT0012EJ0100 Rev.1.00
20.10.2020
Vout [ ���� ] =
10 × 10
10k Ω
Vin
470 Ω
Table 8.1 Voltage Generation Circuit
Output Voltage
(Typ.) [V] (Typ.) [V]
12
5
470
× �������� ���� [����] (2)
+ 470
3
Vout
0.1µF(V )
BUS
NC(V )
Uvw
Output Current
(Max.) [A]
0.06
0.1
User's Manual
V
BUS
V
U
V
V
V
W
Used for:
5V generation
•
Gate driver IC
•
Power supply for MCU
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