Texas Instruments TPS25762Q1EVM-146, User Manual

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6.2 Sub Schematic – Input Circuit
This schematic is U_TPS25772Q1_A_Input sub-schematic of the main schematic. Figure 6-4 shows the input
circuit. TPS25762Q1EVM-146, TPS25772Q1EVM-149, and TPS25772Q1EVM-150 have same input circuit.
10nF
50V
C28
100nF
50V
C33
28.2V
D9
1uH
P6SMB33CA
L2
100nF
50V
C29
GND
VBAT VIN_RAW
10µF
50V
C30
10µF
50V
C32
GND
100nF
50V
C35
4
Q5
NVMFS5C442NLT1G
5
1,2,3
100nF
50V
C31
100nF
50V
Reverse Curr ent, Reve rse Connect ion, a nd EMC fi lter
C34
GND
CONN_GND
VIN_FILT
J12
SPC15363
J13
SPC15354
5
GATE
4
CATHODE
1
VCAP
3
EN GND
2
6
ANODE
U6
LM74700QDBVRQ1
Figure 6-4. Input Circuit
6.3 Sub Schematic – Auxiliary Power
This schematic is SS1 sub-schematic of the main schematic. Figure 6-5 shows the auxiliary power supply circuit.
U7 provides the 5-V power for VCONN and LDO input of U8 and U9. U8 and U9 provide 3.3-V power and 1.1-V
power for peripherals like TIVA, HUB, IO expander, I
2
C temperature sensor, USB mux, and digital potentiometer.
4.7µF
35V
C37
4.7µF
35V
C38
1µF
35V
C44
GND
GND
100nF
50V
C40
100nF
50V
C41
GND
220nF
50V
C39
GND
10V
22uF
C42
10V
22uF
C43
100nF
50V
C36
GND
80.6k
R57
Power Supply for 5 00mA VCONN and HUB f or Data
SH-J13
SH-J12
5.1k
R60
Green
2
1
D12
VIN_FILT
5.1k
R55
2
Green
1
D10
GND
VCC3V3
GND
100nF
50V
C45
6.3V
10µF
C46
GND GND
6.3V
10µF
C48
GND
19.6k
R59
GND
VCC1V1
GND
6.3V
10µF
C49
GND
GND GND
47.0k
R63
5.1k
R56
2
Green
1
D11
GND
TP22
TP23
TP26
TP24 TP25
GND GND
VCC5V
TP21
SH-J15
88.7k
R131
GND
L
D
O
_
5
V
1
2
3
4
5
6
J14
1
OUT
FB
2
GND
3
4
EN
5
PG
6
IN
7
PAD
U9
1
OUT
FB
2
TPS74601PBQWDRVRQ1
GND
3
4
EN PG
5
IN
6
7
PAD
U8
GND
TPS74601PBQWDRVRQ1
VCC3V3
47.0k
R62
97.6k
R58
6.3V
10µF
C47
10V
0.01uF
C50
10V
0.01uF
C51
LMR33620CQ5RNXTQ1
1
PGND
2
VIN
NC
3
4
BOOT
5
VCC
6
AGND
FB
7
PG
8
EN
9
VIN
10
PGND
11
SW
12
U7
1.5uH
L7
Figure 6-5. Auxiliary Power
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SLVUC03 – NOVEMBER 2022
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