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參數資料
| 型號： | 935033050112 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 3 W, 2 CHANNEL, AUDIO AMPLIFIER, PZIP13 |
| 封裝： | PLASTIC, SOT-141, DIL-BENT-SIL, 13 PIN |
| 文件頁數： | 7/11頁 |
| 文件大小： | 90K |
| 代理商： | 935033050112 |
May 1992
5
Philips Semiconductors
Objective specication
2 x 3 W stereo BTL audio output amplier
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
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).
Note to the limiting values
1. The load can be short-circuited at all input conditions.
THERMAL RESISTANCE
Note to the thermal resistance
VP = 11 V; RL = 16 ; 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
SYMBOL
PARAMETER
CONDITIONS
MIN.
MAX.
UNIT
VP
positive supply voltage range
18
V
IORM
repetitive peak output current
1A
IOSM
non repetitive peak output current
1.5
A
Ptot
total power dissipation
Tcase < 60 °C
9W
Tstg
storage temperature range
55
+150
°C
Tvj
virtual junction temperature
+150
°C
Tsc
short-circuit time
see note 1
1hr
SYMBOL
PARAMETER
THERMAL RESISTANCE
Rth j-a
from junction to ambient in free air
45 K/W
Rth j-c
from junction to case
8 K/W
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