2003 Feb 12 4
Philips Semiconductors Preliminary specification
70 W high efficiency power amplifier
with diagnostic facility TDA1562Q; TDA1562ST;
TDA1562SD
BLOCK DIAGRAM
Fig.1 Block diagram.
handbook, full pagewidth
POWER-
STAGE
PREAMP
STAT
VP*
VP*
75
kΩ
−
+
C1+C1−
FEEDBACK
CIRCUIT
TDA1562
POWER-
STAGE
CLASS-B
CLASS-H
FAST MUTE
TEMPERATURE
SENSOR LOAD DUMP
PROTECTION
STANDBY
MUTE
ON
LOAD
DETECTOR DYNAMIC
DISTORTION
DETECTOR
DIAGNOSTIC
INTERFACE
TEMPERATURE
PROTECTION
CURRENT
PROTECTION
LIFT-SUPPLY
LIFT-SUPPLY
disable
disable
16
MODE 4
1
IN+
35
75
kΩ
15 kΩ
reference
voltage
PREAMP
−
+
2
IN−
14
Vref
17
SGND
C2+C2−
OUT−
15 13 6
PGND1 PGND2
MGL264
12
11
DIAG
OUT+
7
8
910
V
P2
VP1