29
D-EJ775
• IC Block Diagrams
IC302
TA2120FN (EL)
+
–
+
–
+
–
23
20
19
18
17
16
15
14
13
2
3
4
5
6
7
8
9
10
11
12
1
24
BIAS
BEEP
PW
SW
MT
SW
ALC
DET
ATT
SW
PWC
SW
OUT B
OUT A
BEEP
IN
BST
PW
B
PW
C
BST
NF
ADD
OUT
RF IN PWC
SW
OUT B OUT C OUT A
PWR
GND
MIX
OUT
ALC
IN
ALC
DET
ATT
SW
IN A
IN B
GND
MT
TC
MT
SW
PW
SW
BIAS
BIAS
IN
BST
SW
BST
OUT
VCC
ADD
A
ADD
B
21
22
PW
A
ALC
ALC
IC406
TB2127AFN (EL)
+
–
CONTROL
+
–
+
–
+
–
TRIANGULAR
WAVE
GENERATING
INTERFACE
PRE-DRIVER
VC
1
SYNC
2
XBRK
3
FG
4
VC
5
DGND
6
XRST
7
DATA
8
XLAT
9
CLK
10
VDU
11
U
12
PGUV
24 PWM
23 APWM
22 AGND
21 VG
20 COM
19 UI
18 VI
17 WI
16 PGW
15 W
14 VDVW
13 V