LX7720 Daughter Board User's Manual
June 2020
LX7720 Daughter Board rev 2.1
20
© 2020 Microsemi Corporation
6
Complete Schematics
C6
0.1uF/50V/0805
VCC
EXT_VREF
1
2
J2
HDR_2_100MIL
1
2
J3
HDR_2_100MIL
C19
3.3uF/50V/0805
C25
0.1uF/50V/0805
EXT_VEE
C1
0.1uF/50V/0805
C2
10uF/50V/0805
C7
0.1uF/50V/0805
C13
0.1uF/50V/0805
C17
0.1uF/50V/0805
C20
0.1uF/50V/0805
C23
0.1uF/50V/0805
C26
0.1uF/50V/0805
C3
220uF/50V
VGS
10-18V @ 1A
5V @ 200mA
2.3-2. 7V
-13V
C16
0.1uF/50V/0805
20-150V @ 5A
VMPS
C9
1uF/50V/0805
VCC
R1 0R/0805
C10
1uF/50V/0805
R2
150K/1%/0805
POT = 41.66K, VOUT=2.3V
POT = 34.09K, VOUT=2.7V
5V @ 200mA
1
1
2
2
3
J1
HDR_3_100MIL
VREF_IN
C11
0.1uF/50V/0805
VIN
1
GND
2
EN
3
ADJ
4
VOUT
5
U2
ADP123AUJZ-R7
1
3
2
R3
50K_15Turns
C25A
10uF/50V/0805
C91
10uF/50V/0805
C92
10uF/50V/0805
C15
10uF/50V/0805
C5
10uF/50V/0805
C8
10uF/50V/0805
C14
10uF/50V/0805
C18
10uF/50V/0805
C27
10uF/50V/0805
C21
10uF/50V/0805
C24
10uF/50V/0805
VGS
85
MGND_6
86
MGND_7
88
VCC_1
21
VCC_2
120
SGND_6
115
DMOD_PS
45
MGND_2
47
MGND_1
43
VGS_VEE
48
MGND_VEE
52
VGSA
55
MGND_3
54
VGSB
67
MGND_4
66
VGSC
99
MGND_8
100
VGSD
111
MGND_9
112
VREF_IN
20
VREF_OUT
19
/EXT_VEE_EN
87
VMPS
80
VBOOST
82
CPP
81
CPN
84
VEE_CP_P
49
VEE_CP_N
50
VEE
51
U1A
LX7720
C22
1uF/50V/0805
C4
220uF/50V
1
2
J4
HDR_2_100MIL
C12
1uF/50V/0805
.
.
Figure 22. Power Connection