INTEGRATED CIRCUITS
DATA SHEET
TDA1562Q
70 W high efficiency power amplifier with diagnostic facility
Preliminary specification |
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1998 Apr 07 |
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File under Integrated Circuits, IC01 |
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Philips Semiconductors |
Preliminary specification |
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70 W high efficiency power amplifier
TDA1562Q
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
QUICK REFERENCE DATA
·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 TDA1562Q is a monolithic integrated 70 W/4 W Bridge-Tied Load (BTL) class-H high efficiency power amplifier in a 17-lead DIL-bent-SIL plastic power package.
The device can be used for car audio systems (e.g. car, radio and boosters) as well as mains fed applications (e.g. midi/mini audio combinations and TV sound).
Test conditions: VP = 14.4 V; RL = 4 W; Rs = 0 W; f = 1 kHz; Tamb = 25 °C; unless otherwise specified.
SYMBOL |
PARAMETER |
CONDITIONS |
MIN. |
TYP. |
MAX. |
UNIT |
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VP |
supply voltage |
operating |
8 |
14.4 |
18 |
V |
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non-operating |
- |
- |
30 |
V |
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load dump |
- |
- |
45 |
V |
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Iq(tot) |
total quiescent current |
on and mute; |
- |
110 |
150 |
mA |
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RL = open circuit |
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Istb |
standby current |
standby |
- |
1 |
50 |
mA |
ïVOOï |
output offset voltage |
on and mute |
- |
- |
100 |
mV |
ïDVOOï |
delta output offset voltage |
on « mute |
- |
- |
30 |
mV |
Gv |
voltage gain |
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25 |
26 |
27 |
dB |
ïZi(dif)ï |
differential input impedance |
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90 |
150 |
- |
kW |
Po |
output power |
THD = 0.5% |
45 |
55 |
- |
W |
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THD = 10% |
60 |
70 |
- |
W |
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THD |
total harmonic distortion |
Po = 1 W |
- |
0.03 |
- |
% |
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Po = 20 W |
- |
0.06 |
- |
% |
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DDD active |
- |
10 |
- |
% |
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SVRR |
supply voltage ripple rejection |
on and mute |
60 |
70 |
- |
dB |
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CMRR |
common mode rejection ratio |
on |
70 |
80 |
- |
dB |
ISRR |
input signal rejection ratio |
mute |
80 |
90 |
- |
dB |
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Vn(o) |
noise output voltage |
on |
- |
100 |
150 |
mV |
1998 Apr 07 |
2 |
Philips Semiconductors |
Preliminary specification |
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70 W high efficiency power amplifier
TDA1562Q
with diagnostic facility
ORDERING INFORMATION
TYPE NUMBER |
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PACKAGE |
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NAME |
DESCRIPTION |
VERSION |
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TDA1562Q |
DBS17P |
plastic DIL-bent-SIL power package; 17 leads (lead length 12 mm) |
SOT243-1 |
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BLOCK DIAGRAM
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C1− |
C1+ |
VP1 |
VP2 |
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3 |
5 |
9 |
10 |
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16 |
CLASS-B |
TEMPERATURE |
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LOAD DUMP |
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status I/O |
CLASS-H |
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SENSOR |
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PROTECTION |
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FAST MUTE |
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mode |
4 |
STANDBY |
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disable |
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CURRENT |
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select |
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MUTE |
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LIFT-SUPPLY |
PROTECTION |
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ON |
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1 |
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VP* |
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IN+ |
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+ |
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POWER- |
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7 |
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PREAMP |
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STAGE |
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OUT+ |
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75 |
− |
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DIAGNOSTIC |
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kΩ |
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INTERFACE |
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FEEDBACK |
TDA1562Q |
LOAD |
DYNAMIC |
8 |
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CIRCUIT |
DETECTOR |
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DISTORTION |
diagnostic |
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75 |
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DETECTOR |
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kΩ |
− |
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POWER- |
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11 |
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PREAMP |
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2 |
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STAGE |
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OUT− |
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IN− |
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+ |
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14 |
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VP* |
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Vref |
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TEMPERATURE |
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15 kΩ |
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LIFT-SUPPLY |
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PROTECTION |
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disable |
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reference |
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signal |
17 |
voltage |
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GND |
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15 |
13 |
6 |
12 |
MGL264 |
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C2− |
C2+ |
PGND1 |
PGND2 |
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Fig.1 Block diagram.
1998 Apr 07 |
3 |
Philips Semiconductors |
Preliminary specification |
|
|
70 W high efficiency power amplifier
TDA1562Q
with diagnostic facility
PINNING |
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SYMBOL |
PIN |
DESCRIPTION |
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IN+ |
1 |
signal input (positive) |
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handbook, halfpage |
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IN− |
2 |
signal input (negative) |
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IN+ |
1 |
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C1− |
3 |
negative terminal of lift electrolytic |
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IN− |
2 |
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capacitor 1 |
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C1− |
3 |
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MODE |
4 |
mode select input |
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MODE |
4 |
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C1+ |
5 |
positive terminal of lift electrolytic |
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capacitor 1 |
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C1+ |
5 |
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PGND1 |
6 |
power ground 1 |
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PGND1 |
6 |
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OUT+ |
7 |
positive output |
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OUT+ |
7 |
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DIAG |
8 |
diagnostic output (open collector) |
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DIAG |
8 |
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VP1 |
9 |
supply voltage 1 |
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VP2 |
10 |
supply voltage 2 |
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VP1 |
9 |
TDA1562Q |
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OUT− |
11 |
negative output |
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VP2 |
10 |
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PGND2 |
12 |
power ground 2 |
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OUT− |
11 |
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C2+ |
13 |
positive terminal of lift electrolytic |
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PGND2 |
12 |
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capacitor 2 |
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C2+ |
13 |
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Vref |
14 |
internal reference voltage |
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C2− |
15 |
negative terminal of lift electrolytic |
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Vref |
14 |
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capacitor 2 |
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C2− |
15 |
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STAT |
16 |
status I/O |
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STAT |
16 |
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SGND |
17 |
signal ground |
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SGND |
17 |
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MGL263 |
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Fig.2 Pin configuration. |
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1998 Apr 07 |
4 |
Philips Semiconductors |
Preliminary specification |
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70 W high efficiency power amplifier
TDA1562Q
with diagnostic facility
FUNCTIONAL DESCRIPTION
The TDA1562Q 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, the reduction in dissipation is about 50% 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.
Status I/O input (pin STAT)
INPUT
This input has 3 possibilities:
1.LOW, ‘fast mute’: the circuit remains switched on, but the input signal is suppressed
2.MID, ‘class-B’: the circuit operates as class-B amplifier, the high power supply voltage is disabled, independent of the case temperature
3.HIGH, ‘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 the circuit is switched from class-B to class-H or vice versa the actual switching takes place at a zero crossing of the input signal.
OUTPUT
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, ‘standby’: the complete circuit is switched off, the supply current is very low
2.MID, ‘mute’: the circuit is switched on, but the input signal is suppressed
3.HIGH, ‘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).
This output has 3 possibilities:
1.LOW, ‘mute’: acknowledge of muted amplifier
2.MID, ‘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, ‘class-H’: the circuit operates as class-H
amplifier, the high power supply voltage is enabled, because the case temperature Tc < 120 °C.
When the circuit is switched from class-B to class-H or vice 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.
1998 Apr 07 |
5 |
Philips Semiconductors |
Preliminary specification |
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70 W high efficiency power amplifier
TDA1562Q
with diagnostic facility
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on |
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supply |
mute |
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voltage |
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0 |
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HIGH |
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mode select |
MID |
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input |
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LOW |
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Vref |
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reference |
VRT |
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voltage |
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0 |
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HIGH |
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status I/O |
MID |
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input |
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LOW |
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HIGH |
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status I/O |
MID |
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class-H (Tc < 120 °C) |
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output |
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class-B (Tc > 120 °C) |
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LOW |
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output voltage |
0 |
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across load |
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quick start |
zerocross change |
fast mute |
zerocross mute |
supply mute |
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mute |
class B/H-operation |
function |
function |
function |
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MGL272 |
Fig.3 Switching characteristics.
1998 Apr 07 |
6 |
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