TDA1562Q
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INTEGRATED CIRCUITS
DATA SH EET
TDA1562Q; TDA1562ST;
TDA1562SD
70 W high efficiency power
amplifier with diagnostic facility
Preliminary specification
Supersedes data of 1998 Apr 07
2003 Feb 12
Philips Semiconductors Preliminary specification
70 W high efficiency power amplifier
with diagnostic facility
FEATURES
• Very high output power, operating from a single low
supply voltage
• Low power dissipation, when used for music signals
• Switches to low output power at too high case
temperatures
• Few external components
• Fixed gain
• Differential inputs with high common mode rejection
• Mode select pin (on, mute and standby)
• Status I/O pin (class-H, class-B and fast mute)
• All switching levels with hysteresis
• Diagnostic pin with information about:
– Dynamic Distortion Detector (DDD)
– Any short-circuit at outputs
– Open load detector
– Temperature protection.
• No switch-on or switch-off plops
TDA1562Q; TDA1562ST;
TDA1562SD
• Fast mute on supply voltage drops
• Quick start option (e.g. car-telephony/navigation)
• Low (delta) offset voltage at the outputs
• Load dump protection
• Short-circuit safe to ground, supply voltage and across
the load
• Low power dissipation in any short-circuit condition
• Protected against electrostatic discharge
• Thermally protected
• Flexible leads.
GENERAL DESCRIPTION
The TDA1562 is a monolithic integrated 70 W/4 Ω
Bridge-Tied Load (BTL) class-H high efficiency power
amplifier in a 17 lead DIL-bent-SILplastic power package.
The device can be used for car audio systems (e.g.
car radios and boosters) as well as mains fed applications
(e.g. midi/mini audio combinations and TV sound).
QUICK REFERENCE DATA
VP= 14.4 V; RL=4Ω; Rs=0Ω; f = 1 kHz; T
=25°C; unless otherwise specified.
amb
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
V
P
supply voltage operating; note 1 8 14.4 18 V
non-operating −−30 V
load dump −−45 V
I
q
quiescent current on and mute; RL= open
− 110 150 mA
circuit
I
stb
V
output offset voltage on and mute −−100 mV
OO
∆V
delta output offset voltage on ↔ mute −−30 mV
OO
G
v
Z
differential input impedance 90 150 − kΩ
i(dif)
P
o
standby current standby − 350µA
voltage gain 25 26 27 dB
output power THD = 0.5% 45 55 − W
THD = 10% 60 70 − W
THD total harmonic distortion Po=1W − 0.03 − %
=20W − 0.06 − %
P
o
DDD active − 2.1 − %
2003 Feb 12 2
Philips Semiconductors Preliminary specification
70 W high efficiency power amplifier
with diagnostic facility
SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT
SVRR supply voltage ripple rejection on and mute 55 63 − dB
CMRR common mode rejection ratio on 56 80 − dB
ISRR input signal rejection ratio mute 80 100 − dB
V
n(o)
Note
1. When operating at VP> 16 V, the output power must be limited to 85 W at THD = 10% (or minimum load is 6 Ω).
ORDERING INFORMATION
TYPE NUMBER
TDA1562Q DBS17P plastic DIL-bent-SIL power package; 17 leads (lead length 12 mm) SOT243-1
TDA1562Q/S10 DBS17P plastic DIL-bent-SIL power package; 17 leads (lead length 7.7 mm) SOT243-3
TDA1562ST RDBS17P plastic rectangular-DIL-bent-SIL power package; 17 leads (row
TDA1562SD RDBS17P plastic rectangular-DIL-bent-SIL (reverse bent) power package;
noise output voltage on − 100 150 µV
PACKAGE
NAME DESCRIPTION VERSION
spacing 2.54 mm)
17 leads (row spacing 2.54 mm)
TDA1562Q; TDA1562ST;
TDA1562SD
SOT577-2
SOT668-2
2003 Feb 12 3
Philips Semiconductors Preliminary specification
70 W high efficiency power amplifier
with diagnostic facility
BLOCK DIAGRAM
handbook, full pagewidth
STAT
MODE
IN+
IN−
V
ref
SGND
16
4
1
2
14
17
CLASS-B
CLASS-H
FAST MUTE
STANDBY
MUTE
ON
75
kΩ
75
kΩ
TEMPERATURE
SENSOR
+
PREAMP
−
FEEDBACK
CIRCUIT
−
PREAMP
+
15 kΩ
reference
voltage
disable
POWERSTAGE
POWERSTAGE
disable
C1+C1−
35
LIFT-SUPPLY
VP*
LOAD
DETECTOR
VP*
LIFT-SUPPLY
TDA1562Q; TDA1562ST;
TDA1562SD
DYNAMIC
V
P2
11
7
OUT+
8
DIAG
OUT−
TDA1562
V
P1
910
LOAD DUMP
PROTECTION
CURRENT
PROTECTION
DIAGNOSTIC
INTERFACE
DISTORTION
DETECTOR
TEMPERATURE
PROTECTION
Fig.1 Block diagram.
2003 Feb 12 4
15 13 6
C2+C2−
PGND1 PGND2
MGL264
12
Philips Semiconductors Preliminary specification
70 W high efficiency power amplifier
with diagnostic facility
PINNING
SYMBOL PIN DESCRIPTION
IN+ 1 signal input (positive)
IN− 2 signal input (negative)
C1− 3 negative terminal of lift electrolytic
capacitor 1
MODE 4 mode select input
C1+ 5 positive terminal of lift electrolytic
capacitor 1
PGND1 6 power ground 1
OUT+ 7 positive output
DIAG 8 diagnostic output (open-collector)
V
P1
V
P2
OUT− 11 negative output
PGND2 12 power ground2
C2+ 13 positive terminal of lift electrolytic
V
ref
C2− 15 negative terminal of lift electrolytic
STAT 16 status I/O
SGND 17 signal ground
9 supply voltage 1
10 supply voltage 2
capacitor 2
14 internal reference voltage
capacitor 2
handbook, halfpage
TDA1562Q; TDA1562ST;
TDA1562SD
1
IN+
2
IN−
3
C1−
4
MODE
5
C1+
OUT+
DIAG
V
P1
V
P2
OUT−
C2+
V
ref
C2−
STAT
SGND
6
7
8
TDA1562Q
9
TDA1562ST
10
TDA1562SD
11
12
13
14
15
16
17
MGL263
PGND1
PGND2
2003 Feb 12 5
Fig.2 Pin configuration.
Philips Semiconductors Preliminary specification
70 W high efficiency power amplifier
with diagnostic facility
FUNCTIONAL DESCRIPTION
The TDA1562 contains a mono class-H BTL output power
amplifier. At low output power, up to 18 W, the device
operates as a normal BTL amplifier. When a larger output
voltage swing is required, the internal supply voltage is
lifted by means of the external electrolytic capacitors. Due
to this momentarily higher supply voltage the obtainable
output power is 70 W.
In normal use, when the output is driven with music-like
signals, the high output power is only needed during a
small percentage of time. Under the assumption that a
music signal has a normal (Gaussian) amplitude
distribution,thereductionindissipationisabout50%when
compared to a class-B output amplifier with the same
output power. The heatsink should be designed for use
with music signals. If the case temperature exceeds
120 °C the device will switch back from class-H to class-B
operation. The high power supply voltage is then disabled
and the output power is limited to 20 W.
When the supply voltage drops below the minimum
operating level, the amplifier will be muted immediately.
Mode select input (pin MODE)
This pin has 3 modes:
1. LOW for standby: the complete circuit is switched off,
the supply current is very low
2. MID for mute: the circuit is switched on, but the input
signal is suppressed
3. HIGH for on: normal operation, the input signal is
amplified by 26 dB.
When the circuit is switched from mute to on or vice versa
the actual switching takes place at a zero crossing of the
input signal. The circuit contains a quick start option, i.e.
when it is switched directly from standby to on, the
amplifier is fully operational within 50 ms (important for
applications like car telephony and car navigation).
TDA1562Q; TDA1562ST;
TDA1562SD
Status I/O (pin STAT)
INPUT
This input has 3 possibilities:
1. LOWforfastmute:thecircuitremainsswitchedon,but
the input signal is suppressed
2. MID for class-B: the circuit operates as class-B
amplifier, the high power supply voltage is disabled,
independent of the case temperature
3. HIGH for class-H: the circuit operates as class-H
amplifier, the high power supply voltage is enabled,
independent of the case temperature.
When the circuit is switched from fast mute to class-B/H or
vice versa the switching is immediately carried out. When
thecircuit is switched from class-Bto class-H or vice versa
the actual switching takes place at a zero crossing of the
input signal.
OUTPUT
This output has 3 possibilities:
1. LOW for mute: acknowledge of muted amplifier
2. MID for class-B: the circuit operates as class-B
amplifier, the high power supply voltage is disabled,
caused by the case temperature Tc> 120 °C
3. HIGH for class-H: the circuit operates as class-H
amplifier, the high power supply voltage is enabled,
because the case temperature Tc< 120 °C.
Whenthecircuitisswitchedfromclass-Btoclass-Horvice
versa the actual switching takes place at a zero crossing
of the input signal.
The status I/O pins of maximum 8 devices may be tied
together for synchronizing purposes.
2003 Feb 12 6
Philips Semiconductors Preliminary specification
70 W high efficiency power amplifier
with diagnostic facility
mute
HIGH
MID
LOW
V
VRT
HIGH
MID
LOW
on
0
ref
0
handbook, full pagewidth
supply
voltage
mode select
input
reference
voltage
status I/O
input
TDA1562Q; TDA1562ST;
TDA1562SD
status I/O
output
output voltage
across load
HIGH
MID
LOW
0
quick start
mute
zero crossing change
class-B/H operation
Fig.3 Switching characteristics.
class-H (Tc < 120 °C)
class-B (Tc > 120 °C)
fast mute
function
zero crossing mute
function
supply mute
function
MGL272
2003 Feb 12 7
Philips Semiconductors Preliminary specification
70 W high efficiency power amplifier
with diagnostic facility
Diagnostic output (pin DIAG)
DYNAMIC DISTORTION DETECTOR (DDD)
At the onset of clipping of the output stages, the DDD
becomes active. This information can be used to drive a
sound processor or DC-volume control to attenuate the
input signal and so limit the distortion.
SHORT-CIRCUIT PROTECTION
When a short-circuit occurs at the outputs to ground or to
the supply voltage, the output stages are switched off.
They will be switched on again approximately 20 ms after
removing the short-circuit. During this short-circuit
condition the diagnostic output is continuously LOW.
When a short-circuit occurs across the load, the output
stages are switched off during approximately 20 ms. After
that time is checked during approximately 50 µs whether
the short-circuit is still present. During this short-circuit
condition the diagnostic output is LOW for 20 ms and
HIGH for 50 µs. The power dissipation in any short-circuit
condition is very low.
TDA1562Q; TDA1562ST;
TDA1562SD
TEMPERATURE DETECTION
Justbeforethetemperatureprotection becomes active the
diagnostic output becomes continuously LOW.
LOAD DETECTION
Directly after the circuit is switched from standby to mute
or on, a built-in detection circuit checks whether a load is
present. The results of this check can be detected at the
diagnosticoutput,byswitchingthemodeselectinputinthe
mute mode.
Since the diagnostic output is an open-collector output,
more devices can be connected.
handbook, full pagewidth
mode select
input
output voltage
across load
diagnostic
output
HIGH
MID
LOW
HIGH
LOW
0
no load
clipping signal
short-circuit to
supply or ground
short-circuit
across load
t
MGL265
Fig.4 Diagnostic information.
2003 Feb 12 8
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