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HCD-BX70DBi
• 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-BX70DBi
IC401 BA5826SFP-E2
1
28
VO1(–)
D.BUFF
27
2
VO1(+)
D.BUFF
LEVEL
D.BUFF
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
9
IN2'
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(–)
VO4(+)
OVER HEAT &
OVER CURRENT
PROTECTION
CONTROL
IN4
–
CIRCUIT
+
IN4'
BANDGAP
REFERENCE
1
2
3
BIAS
VCC
VCC
IN3'
IC304 BD3499FV-E2
IN3
A1
1
A2
2
B1
3
B2
4
INPUT
INPUT
VO3(+)
GAIN
C1
5
SELECTOR
C2
6
VO3(–)
D1
7
D2
8
RESETt
SEL2
9
OPIN
INVERTER
SEL1
10
VOL1
11
VOLUME
VOL2
12
TC2
13
TC1
14
TREBLE/
BASS
IC311 BA6956AN
TSD
CONTROL LOGIC
1
2
3
4
5
6
7
38
38
– MAIN Board –
IC201 R5523N001B-TR-F
4
GATE
EN
1
CONTROL
UVLO
GND
2
THERMAL
SHUTDOWN
FLG
3
28 FIL
27 GND
PC BUS
26 SDA
LOGIC
25 SCL
24 VCC
23 OUT1
SURROUND
22 SB1
21 SR
20 SB2
19 OUT2
18 BCB1
17 BCA1
16 BCA2
15 BCB2
8
9
5 OUT
CURRENT
LIMIT
4 IN
FLAG
DELAY
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