TDA7057Q/N1 데이터 시트보기 (PDF) - Philips Electronics
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TDA7057Q/N1 Datasheet PDF : 9 Pages
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Philips Semiconductors
2 x 3 W stereo BTL audio output amplifier
Objective specification
TDA7057Q
FUNCTIONAL DESCRIPTION
The TDA7057Q is a stereo output amplifier, designed for battery-fed applications e.g. portable radios, but also suitable
for mains fed applications. The gain is internally fixed at 40 dB.
For space reason there is a trend to decrease the number of battery cells. This means a decrease in supply voltage,
resulting in a reduction of output power at conventional output stages. The latter is not preferred. Using the BTL principle
increases the output power. The TDA7057Q can deliver an output power of 3 W in a speaker load of 16 Ω with 11 V
supply.
The circuit is designed such that no external components are required. Special attention is given to switch-on and off
clicks, low HF radiation and a good overall stability. The load can be short-circuited at all input conditions.
LIMITING VALUES
In accordance with the Absolute Maximum System (IEC 134).
SYMBOL
VP
IORM
IOSM
Ptot
Tstg
Tvj
Tsc
PARAMETER
positive supply voltage range
repetitive peak output current
non repetitive peak output current
total power dissipation
storage temperature range
virtual junction temperature
short-circuit time
CONDITIONS
Tcase < 60 °C
see note 1
Note to the limiting values
1. The load can be short-circuited at all input conditions.
MIN.
−
−
−
−
−55
−
−
MAX.
18
1
1.5
9
+150
+150
1
UNIT
V
A
A
W
°C
°C
hr
THERMAL RESISTANCE
SYMBOL
Rth j-a
Rth j-c
PARAMETER
from junction to ambient in free air
from junction to case
THERMAL RESISTANCE
45 K/W
8 K/W
Note to the thermal resistance
VP = 11 V; RL = 16 Ω; The maximum sine-wave dissipation is = 3 W; Tamb (max) = 60 °C; Rth vj-a = (150 − 60)/3 = 30 K/W
Rth vj-a = Rth vj-c + Rth c-HS + Rth HS
Rth c-HS + Rth HS = 30 − 8 = 22 K/W
May 1992
5
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