TDA7293
3
1
4
13
7
8
15
2
14
6
10
R3 680
C11 22
µ
F
L3 5
µ
H
R18 270
R16
13K
C15
22
µ
F
9
R12
13K
C13 10
µ
F
R13 20K
C12 330nF
R15 10K
C14
10
µ
F
R14 30K
D5
1N4148
PLAY
ST-BY
R17 270
L1 1
µ
H
T1
BDX53A
T3
BC394
D3 1N4148
R4
270
R5
270
T4
BC393
T5
BC393
R6
20K
R7
3.3K
C16
1.8nF
R8
3.3K
C17
1.8nF
Z2 3.9V
Z1 3.9V
L2 1
µ
H
R19 270
D4 1N4148
D2 BYW98100
R1
2
R2
2
C9
330nF
C10
330nF
T2
BDX54A
T6
BC393
T7
BC394
T8
BC394
R9
270
R10
270
R11
20K
OUT
IN
C7
100nF
C5
1000
µ
F
35V
C8
100nF
C6
1000
µ
F
35V
C1
1000
µ
F
63V
C2
1000
µ
F
63V
C3
100nF
C4
100nF
+50V
+25V
D1 BYW98100
GND
-25V
-50V
D97AU807C
12
D6
1N4001
R20
20K
R21
20K
D7
1N4001
R22
10K
R23
10K
P
ot
Figure 6: High Efficiency Application Circuit
Figure 6a: PCB and Component Layout of the fig. 6
TDA7293
9/15