4
Schematic diagrams
Figure 24.
STEVAL-ETH001V1 circuit schematic (1 of 10)
Linear regulation 3.8V to +3.3V
VBUS
20-60 V
DC-DC conversion, +Vbus to +3.3V
560.9 kHz
3v3
+Vbus
+15Vcc
+5V
+15Vcc
+Vbus
+15Vcc
3v8
+Vbus
3v8
3v8
C107
47uF
+
C94
330uF
100V
1
2
C102
0.1uF
R136
0
C116
3.3uF
C120
10uF
1
2
TP2
5001
+
C96
330uF
100V
1
2
D17
STPS2L60A
R128
0
D18
STPS2L60A
C108
1uF
C117
3.3uF
R139
39k
C118
1 uF
C104
1 uF
C172
10nF
N.M.
R141
2.2k
C112
180pF
C95
100nF
C105
1 uF
R140
39k
TP1
5001
C97
100nF
C103
4.7uF
C168
2.2uF
R133
68k
C98
1uF
L6
1
2
L7987L
U15
VBIAS
1
VIN
2
VIN_2
3
VCC
4
EN
5
SS
6
SYNCH
7
COMP
8
FB
9
FSW
10
ILIM
11
PGOOD
12
LX
13
LX_2
14
BOOT
15
GND
16
EP
17
C210
0.1uF
R130
U27LD39150DT33-R
Vout
2
GND
4
Vin
1
R138
46.4k
L5
10uH
1
2
C100
100pF
C173
0.1uF
C156
1uF
C109
820pF
C111
1uF
C99
820pF
R131
40.2k
L7987L
U14
VBIAS
1
VIN
2
VIN_2
3
VCC
4
EN
5
SS
6
SYNCH
7
COMP
8
FB
9
FSW
10
ILIM
11
PGOOD
12
LX
13
LX_2
14
BOOT
15
GND
16
EP
17
U16
IN
1
OUT
3
GND
4
C119
0.1uF
R135
750R
C106
22nF
C115
0.1uF
R129
680R
R132
33k
C206
1 uF
L7805CD2T-TR
R134
18k
11
10
7
6
SS
5
4
3
2
U14
C110
0.1uF
C100
2
1
L5
10uH
Vin
4
D16
SMBJ48A-TR
5.6k
17
15
14
13
12
9
8
1
U15
1
33uH
C98
C103
C97
TP1
C105
C95
C104
C114
27nF
C101
22nF
R128
0
R137
3.3k
2
1
100V
C96
+
2
1
J9
CON2
C113
1uF
R136
0
2
1
100V
C94
+
+Vbus
3v8
+Vbus
519.4 kHz
DC Bus Voltage Input
DC-DC conversion, +Vbus to +15V
DC-DC conversion, +15Vcc to +5V
UM2807
-
Rev 1
page 18/40
UM2807
Schematic diagrams
