Duo-I Plus Power Supply - Boston duo-i plus Service Manual

1 2
PGND
KBU606
C69
330pF, 50V
3
-
C76
100nF, 50V
A
C77
330pF, 50V
PGND
Special layout consideration
T16
CN4
1
2
3
4
Special layout consideration
B
GND_DIGITAL F2
KBP206
120 OHM
C98 D5
330pF, 50V C103
6800uF
25V 100nF, 50V
-
C179
C106
330pF, 50V 100nF, 50V
GND_DIGITAL
C108
R96
330pF, 50V
Low_Power_Mode
68k, 1%
R98
GND_DIGITAL 100k, 1%
T30
GND_ANALOG
C
D
1 2
3
P_Power_Amp
D2
C73
1
6800uF
25V
FB38
LGATE
1K OHM
PGND
D3
U5
C79 1
NC VCC
2
SYNC A
R41 49.9 3
GND Y
150pF, 50V
NC7SZ05M5X
D4
SGND
T17
FB22 FB37
C222 C223
330pF 1nF
GND_DIGITAL GND_DIGITAL
The +10V rail is actually
closer to +9.25Vdc.
50µA max (off)
U8
LM2931CS P10V_AUDIO T14 560 T15
4 5
IN OUT
R95 R52
C259 51k, 1% 2 1 R209
ON/OFF ADJ D7 C102
576R, 1%
100nF, 50V
4.7V
C260
+
C261
100nF, 50V
220uF, 16V
GND_ANALOG GND_ANALOG
C262
+ GND_ANALOG
R211
10uF, 16V
Q17
1
4K02, 1%
B MMBT3904
C180
2.2uF, 16V
GND_ANALOG GND_ANALOG GND_ANALOG
3
4 5
P5VOut
C74 C75
P5VOut
C78 1uF 1uF
100nF, 50V
GND_DIGITAL
5
SGND GND_DIGITAL SGND C220
4
100pF, 25V
R42 22.6k
C81 U6
ISL6442IAZ
22pF, 50V 1
Do Not Populate OCSET1
SGND 23
BOOT1
22
C83 100nF, 50V 2 UGATE1
SS1EN1 21
C84 100nF, 50V 11 PHASE1
SS2EN2 20
5 LGATE1
RT
R44 52.3k 12
OCSET2
C88 3 14
COMP1 BOOT2
4 15
SGND FB1 UGATE2
10 16
COMP2 PHASE2
100pF, 50V 9 17
FB2 LGATE2
C89
R46 7.5K
3.3nF, 50V
C90
100pF, 50V
C91
R47 1.13k
C219
10nF, 50V SGND
100pF, 25V
Do Not Populate
GND_DIGITAL
GND_DIGITAL
C93
R49 150
1nF, 50V
R50 29.4k
P4V7 D6
4.7V
C99
R54 10k
C159
220uf
4.7uF, 10V
6.3V
C105
R55 100
2.2nF, 50V
SGND
P3V3
C116
100pF, 25V
GND_DIGITAL
4 5
6
C70 C189 C191
+ C71
C72
47uF, 20V
1uF 1nF 330pF
1nF, 50V
R39 4.02k
C228 GND_DIGITAL
4.7uF, 25V P5VLCM P5V
1
R109 36.5 FDC6561AN FB43
L5
Q3B
47uH 5V @ 1.05A +/-5%
T33
75V D12 BAS316
C221
R113 10
36.5
1nF, 50V
C80 C162 C163
Do Not Populate 3
C216
Q3A
R110 100pF, 25V 2.2uF 2.2uF 2.2uF
GND_DIGITAL C160
47nF, 50V 1.5nF, 50V
75V D13 BAS316
C82
LGATE
GND_DIGITAL
C86
C87
1nF, 50V
47nF, 50V C190 C85 C192
1.37K
1nF 1uF,25V 330pF
R45
75V D14 BAS316
31.6 GND_DIGITAL GND_DIGITAL P9V
3 9V @ 200mA +/-5%
L6
Q4A FB44
100uH
R111 T12
T32
C218 R114 10
1nF, 50V 75V D15 BAS316 C92 C164
31.6
C217 C112
1 2.2uF,16V
1uF,16V 100pF, 25V 100pF, 25V
Q4B
C161
R112 P3V3
LGATE2 1.5nF, 50V
FB50
1K OHM
GND_DIGITAL
T10
Q5
P10V_AUDIO FB45 T13 4
3 2
120 OHM
C96
+
FZT749
47uF, 16V, ESR=1.4
100
R51 5.49k
C100
+
R53 C101
C104
100nF, 50V
GND_DIGITAL
47uF,16V,ESR=0.07
1uF, 16V
R56 1.21k
GND_DIGITAL
SGND
P5V
C135 C95
100pF, 25V 100pF, 25V
GND_DIGITAL
Special Layout Consideration
Shield Can
CAN1
2.28in x 1.65in
GND_ANALOG GND_ANALOG

Duo-i Plus Power Supply

6
7 8
A
P3V3
Special layout consideration
L11 PADC_DAC
2.2uH
P3V3A
FB40
1K OHM
T9 T11
B
C188
10nF, 50V
GND_ANALOG
C
D
Integrated Products Division
300 Jubilee Drive
Peabody, MA 01960 USA
978.538.5000 FAX: 978.538.6226
Title
Duo-I+
Size Number Revision
D Power Supply 3.0
Date: 9/10/2009 Time: 11:00:58 PM Drawn By: GlennR Sheet 9 of 9
File: C:\BostonAcoustics\ClockRadio\Duo-I Plus\Hardware\Power Supply.SchDoc
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