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NuMaker-HMI-N9H20
Mar. 15, 2022
Page
32
of 42
Rev 1.00
NUMA
K
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R
-HMI
-N
9H20
US
E
R M
A
NU
A
L
Ma
k
er Nu
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be
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NUC
47
2
Us
er Man
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l
3.3
NuMaker-N9H20 Power Supply Circuit
Figure 3-3 shows the NuMaker-N9H20 power supply circuit.
Figure 3-3 NuMaker-N9H20 Power Supply Circuit
VS
DC
5V
RTC18V
(ZT7104)
VS
+
CP18
47u
CB22
0.1u
CX4
30p
RTC18V
VS
CON4
BAT1
1
2
3
CB23
0.1u
PWREN
C6
0.01u
1.8V : 240K/120K
2.0V : 300K/120K
VS
CX5
10n
S3
PWR_ON_OFF
CON5
BAT2
1
2
VS
R22
4K7
VD33
VD18
PWREN
VS
VIN
C7
0.1u
VS
Q3
2N3906
1
2
3
+
-
5VIN
U2
ZT7104AS
SOT23-5L
1
3
2
4
5
VIN
CE
VSS
FB
SW
PWREN
R23
10K
VD18
RX1 680K
Q1
IS2301
1
3
2
+
-
+
CP21
47u
CAP_B
RX4 240K
CX1
0.1u
Q2
IS2301
SOT-23-GSD
1
3
2
VS
LX2
4.7uH
INDUCTOR IRON
VS
D1
RB161M
POWER
LED
U3
ZT7104AS
SOT23-5L
1
3
2
4
5
VIN
CE
VSS
FB
SW
RTC18V
ON OFF
VS
VS
VS
LED1
Power
+
CP19
47u
POWER
CON3
DC5V
2
3
1
RX5
120K
LX1
4.7uH
INDUCTOR IRON
CX2
30p
VS
+
CP20
47u
CAP_B
VS
R18
10K
BAT
VD33
CB24
0.1u
RX2
150K
CX3
0.1u
R19
100K
RX3
51K
U4
XC6206P182MR
SOT-23-GOI
1
2
3
VSS
VOUT
VIN
R21
10K
BAT
ZD1
5V6
R20
1K