HCD-HDX275/HDX277WC/HDX279W/HDX475/HDX576WF/HDX675
65
1
VC
TSD
2
VIN
3
GND
4
VOUT
5
ADJ
+
–
REF
1
2
3
6
4
CONT
GND
NP
VIN
5
GND
VOUT
CONTROL
CIRCUIT
BANDGAP
REFERENCE
CONSTANT
CURRENT
SOURCE
OVER HEAT &
OVER CURRENT
PROTECT
VDD 2
OUT 1
GND 3
+
–
VREF
CD
5
NC
4
• IC Block Diagrams
– MAIN Board –
IC201, 505, 506 SI-3010KM-TLS
IC502 TK11250CMCL-G
IC503 PST3635NR
36
23
24
1
2 3
4
5
44
8 9 10
46
17
22
21
20
30
35
25
26
27
28
29
32
33
34
16
45
13
14
15
47
48
DI
EMPHA
AUDIO
DISEL
DOUT
DINO
DINI
DIN2
6
DGND
7
DVDD
11
AV
D
D
12
AGND
DOSEL0
R
VIN
LPF
CKSEL0
XSTATE
18 DGND
19 DVDD
XIN
XOUT
XMCK
XSEL
31
DGND
DO
CSFLAG
F0
F1
F2
VF
ERR9P
BPSYNC
ERROR
DATAO
DOSEL1
CKOUT
BCK
LRCK
CKSEL1
XMODE
TIMING
SAMPLING
FREQUENCY
C BIT
DETECT
PA/PB
DETECT
LOCK
DETECT
INPUT
CIRCUIT
DATA
DEMODULATOR
PLL
X’ TAL
IC702 LC890561W-E
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