Schematics

A
B
D
123456
D
C
A
B
C
C2
0.1u
VBUS
D-
D+
ID
GND
J1
Y1
20M
C6
20P
C7
20P
C11
0.1u
C9
0.1u
C8
0.1u
CLK
R9
100KF
NTC1
100KJ
R8
100KF
R7
499KF
C5
0.1u
DIO
GND
C1
22u
R19
1KJ
R18
1KJ
1
VSS
2
PA0
3
PA1
4
PA2
5
PA3
6
PA4
7
PA5
8
PA6
9
PA7
10
PB0
11
PB1
12
PB2
13
PB3
14
PB4
15
PB5
16
PB6
17
PB7
18
PC0
19
PC1
20
VDD
U2
IMT1810B
R6
10KJ
TEST
RST
R5
3KJ
R4
20KJ
R2
3KJ
R3
20KJ
C29
50V/0.1u
C30
50V/0.1u
C31
50V/0.1u
C32
50V/0.1u
C22
105P
D1
R
1
BST
2
PWM
3
EN
4
VCC
5
SWN
6
SWN
7
PGND
8
VIN
U4
LP1130
D5
S4
C24
226P
R26
10KJ
C21
105P
C26
105P
1
BST
2
PWM
3
EN
4
VCC
5
SWN
6
SWN
7
PGND
8
VIN
U5
LP1130
D6
S4
C28
226P
R27
10KJ
C25
105P
C19
4.7n
C18
104P
R21
10KF
R20
10KF
R25
0.02RF
C20
103P
R24
1KF
R23
33KF
R22
10KF
C10
104P
C4
106P
C3
106P
1
GND
2
VIN
3
VOUT
U1
HT7550
R1
10RJ
C23
223P
C27
223P
C37
4.7n
C38
104P
R28
10KF
R29
100KF
R32
10KF
R39
1MF
+
-
10
9
8
U3-C
LM324
+
-
13
12
14
U3-D
LM324
+
-
2
3
1
U3-A
LM324
+
-
5
6
7
U3-B
LM324
C12
0.1u
R16
100KJ
R17
5.6KJ
D4
1N4148W
C16
10n
C15
47n
R12
100KF
R13
47KF
R14
100KJ
C14
0.1u
R15
1.5KJ
C13
0.1u
R11
100KJ
R10
2.2MJ
L1
Coil
6.3UH
12
34
D2
LED-1204R+G
12
34
D3
LED-1204R+G
C17
0.1u
OSCI
OSCO
MCU_VDDVIN
TEM_AD
VIN_DET
MCU_VDD
RST
LEDR
LEDG
VIN
D-
D+
OSCI
OSCO
MCU_VDD
RST
PA
MCU_VDD
PB
LEDR
LEDG
COILV
VIN_DET
MCU_VDD
D-
D+
D-OUT
D+OUT
D-OUT
D+OUT
V_BACK
TEM_ADCOILI
DATI
MCU_VDD
PB
MCU_VDD
PA
VIN
DATI
COILI
MCU_VDD
DATV
MCU_VDD
COILV
V_BACK
DATV
LEDR
LEDG
MCU_VDD