Philips TDA1521A-N5 Datasheet
DATA SH EET
Product specification
File under Integrated Circuits, IC01
July 1994
INTEGRATED CIRCUITS
TDA1521A
2 x 6 W hi-fi audio power amplifier
July 1994 2
Philips Semiconductors Product specification
2 x 6 W hi-fi audio power amplifier TDA1521A
GENERAL DESCRIPTION
The TDA1521A is a dual hi-fi audio power amplifier encapsulated in a 9-lead plastic power package. The device is
especially designed for mains fed applications (e.g. stereo tv sound and stereo radio).
Features
• Requires very few external components
• Input muted during power-on and off
(no switch-on or switch-off clicks)
• Low offset voltage between output and ground
• Excellent gain balance between channels
• Hi-fi according to IEC 268 and DIN 45500
• Short-circuit-proof
• Thermally protected.
QUICK REFERENCE DATA
PACKAGE OUTLINE
TDA1521A: 9-lead single in-line; plastic power (SOT 110B); SOT110-1; 1996 July 22.
Stereo applications
Supply voltage range V
P
± 7,5 to ± 21,0 V
Output power at THD = 0,5%,
V
P
= ± 12 V P
o
typ. 6 W
Voltage gain G
V
typ. 30 dB
Gain balance between channels ∆G
V
typ. 0,2 dB
Ripple rejection SVRR typ. 60 dB
Channel separation α typ. 70 dB
Noise output voltage V
no(rms)
typ. 70 µV
July 1994 3
Philips Semiconductors Product specification
2 x 6 W hi-fi audio power amplifier TDA1521A
Fig.1 Block diagram.
July 1994 4
Philips Semiconductors Product specification
2 x 6 W hi-fi audio power amplifier TDA1521A
PINNING
FUNCTIONAL DESCRIPTION
This hi-fi stereo power amplifier is designed for mains fed applications. The circuit is designed for both symmetrical and
asymmetrical power supply systems. An output power of 2 × 6 watts (THD = 0,5%) can be delivered into an 8Ωload with
a symmetrical power supply of ± 12 V.
The gain is fixed internally at 30 dB. Internal gain fixing gives low gain spread and very good balance between the
amplifiers (0,2 dB).
A special feature of this device is a mute circuit which suppresses unwanted input signals during switching on and off.
Referring to Fig.12, the 100 µF capacitor creates a time delay when the voltage at pin 3 is lower than an internally fixed
reference voltage. During the delay the amplifiers remain in their DC operating mode but are isolated from the
non-inverting inputs on pins 1 and 9.
Two thermal protection circuits are provided, one monitors the average junction temperature and the other the
instantaneous temperature of the power transistors. Both protection circuits activate at 150 °C allowing safe operation to
a maximum junction temperature of 150 °C without added distortion.
RATINGS
Limiting values in accordance with the Absolute Maximum System (IEC 134)
Note
1. For asymmetrical power supplies (at short circuiting of the load) the maximum supply voltage is limited to V
P
= 28 V.
1 −INV1 non-inverting input 1
5 −V
P
negative supply (symmetrical)
2 INV1 inverting input 1 ground (asymmetrical)
3 GND
ground (symmetrical) 6 OUT2 output 2
1
⁄2VP(asymmetrical) 7 + V
P
positive supply
4 OUT1 output 1 8 INV2 inverting input 2
9 −INV2 non-inverting input 2
PARAMETER CONDITIONS SYMBOL MIN. MAX. UNIT
Supply voltage pin 7 V
P
= V
7-3
− +21 V
pin 5 −VP= V
5-3
−−21 V
Non-repetitive peak
output current
pins 4 and 6 I
OSM
− 4A
Total power dissipation see Fig.2 P
tot
Storage temperature range T
stg
−55 + 150 °C
Junction temperature T
j
− 150 °C
Short-circuit time: see note 1
outputs short-circuited
to ground symmetrical
(full signal drive) power supply t
sc
− 1 hour
asymmetrical
power supply t
sc
− 1 hour
July 1994 5
Philips Semiconductors Product specification
2 x 6 W hi-fi audio power amplifier TDA1521A
THERMAL RESISTANCE
HEATSINK DESIGN EXAMPLE
With derating of 6 K/W, the value of heatsink thermal resistance is calculated as follows:
given RL = 8 Ω and VP= ± 12 V, the measured maximum dissipation is 7,8 W; then, for a maximum ambient temperature
of 60 °C, the required thermal resistance of the heatsink is
Note: The metal tab (heatsink) has the same potential as pin 5 ( − VP).
From junction to case R
th j-c
= 6 K/W
Fig.2 Power derating curve.
R
th h-a
150 60–
78,
----------------------
6 5,5 K/W=–=
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