Renesas RA Family
5.1.4
Output voltage detection circuit
The INV-BRD has the circuit that inputs bus voltage and three-phase output voltage (U, V and W phase) into
the AD pin of the microcontroller through resistive voltage divider. Relation between the three-phase output
voltage, the bus voltage and the detection voltage is described by the below equation (3).
5.1.5
Voltage generation circuit
On the INV-BRD, the gate driver voltage ("+12V" in the schematic) is generated from the 5V power supply
("+5V" in the schematic) with the boost converter. If 5V is not supplied from the CPU board, the buck
converter on the INV-BRD generates 5V from the voltage input (12 to 48V) from the DC jack or terminal
block.
5V generation
Gate driver voltage
R12UZ0091EJ0100 Rev 1.00
August 3, 2021
Vout [ ] =
10 × 10
10k W
Vin
470 W
Figure 5-4 Output voltage detection circuit
Table 5-1
Input voltage
Item
[V]
12~48
5
generation
470
× [ ] (3)
3
+ 470
Vout
0.1mF
Voltage generation
Output voltage
(TYP.) [V]
5
11.4
MCK-RA6T2 User's Manual
V
BUS
V
U
V
V
V
W
Output current
(Max) [A]
0.6
-
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