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HCD-BX77DBi
• IC Block Diagrams
– CD Board –
IC201 TK63115SCL-G@GT
VIN 1
THERMAL &
OVER CURRENT
PROTECTION
–
VOLTAGE
GND 2
REFERENCE
+
5
VOUT
ON/OFF
VCONT 3
4
NC
CONTROL
– DAB Board –
IC801 TK11133CSCL-G
5
4
OVER HEAT &
OVER CURRENT
PROTECTION
CONTROL
CIRCUIT
–
+
BANDGAP
REFERENCE
1
2
3
HCD-BX77DBi
IC401 BA5826HFP-E2
28
VO1(–)
1
D.BUFF
27
2
VO1(+)
D.BUFF
D.BUFF
LEVEL
SHIFT
26
IN1
3
D.BUFF
LEVEL
SHIFT
25
RESET
4
24
THERMAL
SHUT-DOWN
REGULATOR
BIAS TRAP
23
REGB
5
VCC
22
REGOUT
6
VCC
21
MUTE
MUTE
7
20
GND
8
IN2'
9
19
IN2
10
LEVEL
LEVEL
SHIFT
D.BUFF
D.BUFF
SHIFT
18
VO2(+)
11
D.BUFF
D.BUFF
17
VO2(–)
12
GND
13
16
OPOUT
14
15
IC802 TK68112AS2G0L-C
VIN
1
5
VOUT
REFERENCE
–
VOLTAGE
+
ON/OFF
GND
2
CONTROL
THERMAL & OVER
CURRENT PROTECTION
VCONT
3
4
NC
– IP Board –
IC102 TK11133CSCL-G
GND
5
VO4(–)
OVER HEAT &
VO4(+)
OVER CURRENT
PROTECTION
CONTROL
–
CIRCUIT
IN4
+
BANDGAP
IN4'
REFERENCE
1
2
3
BIAS
VCC
VCC
IN3'
IC304 BD3499FV-E2
IN3
A1
1
A2
2
B1
3
VO3(+)
B2
4
INPUT
INPUT
SELECTOR
GAIN
C1
5
C2
6
VO3(–)
D1
7
RESETt
D2
8
OPIN
SEL2
9
INVERTER
SEL1
10
VOL1
11
VOLUME
VOL2
12
TC2
13
TC1
14
TREBLE/
BASS
36
36
– MAIN Board –
IC201 R5523N001B-TR-F
4
GATE
EN
1
CONTROL
UVLO
GND
2
THERMAL
SHUTDOWN
FLG
3
IC311 BA6956AN
TSD
28 FIL
27 GND
26 SDA
PC BUS
LOGIC
25 SCL
1
2
3
4
5
24 VCC
23 OUT1
SURROUND
22 SB1
21 SR
20 SB2
19 OUT2
18 BCB1
17 BCA1
IC312 MC14052BDTR2
16 BCA2
15 BCB2
2Y0
1
2Y2
2
2-COM
3
2Y3
4
2Y1
5
INH
6
GND
7
GND
8
5 OUT
CURRENT
LIMIT
4 IN
FLAG
DELAY
CONTROL LOGIC
6
7
8
9
16
VCC
15
1Y2
14
1Y1
13
1-COM
12
1Y0
11
1Y3
10
A
9
B
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