Peripheral Circuit Power Supply (Vdd(3.3[V]) Or Vcc(5.0[V])) - Renesas RAA306012 User Manual

RAA306012 RSSK User's Manual
4.1.3

Peripheral Circuit Power Supply (VDD(3.3[V]) or VCC(5.0[V]))

he power supply for the peripheral circuits on the Evaluation Board can be selected from VDD pin (3.3[V]) or
VCC pin (5.0[V]) of the smart gate driver by the 0[Ω] resistors connection. The power supply for some
peripheral circuits (Current Sense (External), Halls, LEDs, RMWB(ICS)) can be also selected from U301
(5.0[V]) or U302 (3.3[V]) by JP304 and 0[Ω] resistors (R335, R363, R364, R365, R366, R367, R368, R369). In
the default settings of the Evaluation Board, R97 and R98 are not mounted, so the VDD pin (3.3[V]) is
selected, and 2-3 of JP304 are shorted to select U302 (3.3[V]). When selecting the VCC pin (5.0[V]) as the
power supply for the peripheral circuits, mount 0[Ω] resistors to R97 and R98 shown in Figure 4-2. Also,
connect 1-2 of JP304 to select U301 (5.0[V]).
The output voltage (V
DD
bleeder ratio (R4 / R5) of the external feedback resistors shown in Figure 4-2. These resistances on the
Evaluation Board are R4 = 160[kΩ] and R5 = 91[kΩ], so the output voltage of the VDD pin is 3.310[V]. For
details of VDD pin and VCC pin, refer to 4.1.2 in the "RAA306012 Application Notes: Hardware
(R18AN0067EJ)".
When changing the Peripheral Circuit Power Supply on the Evaluation Board, it is necessary to change the
operating voltage of the E2OB circuit on the Control Board as well. The voltage settings of the E2OB circuit on
the Control Board can be changed by changing the JP102 settings. To use 5.0[V], connect 1-2 of JP102 and
to use 3.3[V], connect 2-3 of JP102. The power supply settings for the E2OB circuit on the Control Board with
JP102 are shown in Figure 4-3.
HALL
(EX_LDO select)
R369
MVDD
EX_LDO
R368
：Short (0[Ω] resistor or solder)
0
： Mounted resistor
： Mounted capacitor
Figure 4-2 Peripheral Circuit Power Supply Components for Evaluation Board
R12UZ0128EJ0100 Rev.1.00
Nov 1, 2023
) can be fine-tuned within the recommended operating conditions by adjusting the
U301
(5.0[V])
JP304
U301 U302
C19
R97
R4
R99
(VDD(3.3[V]) or VCC(5.0[V]))
1 2 3
U302
(3.3[V])
EX_LDO (3.3[V] select)
EX_LDO
MVDD
C18
R335
R98
Current Sense (External)
R5
(MVDD select)
MVDD
(VDD3.3[V] select)
4. Peripheral Circuits
RMBK(ICS) (EX_LDO select)
R366 R367
EX_LDO MVDD
MVDD EX_LDO
R365 R364
LED (EX_LDO select)
R363
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