Datasheet > TDA7052BT/N1/N,118

TDA7052BT/N1/N,118

更新时间： 2024-01-13 00:30:18

品牌	Logo	应用领域
恩智浦 - NXP		/
页数	文件大小	规格书
16页	110K
描述
TDA7052B - Mono BTL audio amplifier with DC volume control SOIC 8-Pin

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TDA7052BT/N1/N,118 技术参数

Source Url Status Check Date：	2013-06-14 00:00:00	生命周期：	Obsolete
零件包装代码：	SOIC	包装说明：	PLASTIC, SOT-96-1, 8 PIN
针数：	8	Reach Compliance Code：	unknown
风险等级：	5.73	Base Number Matches：	1

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NXP Semiconductors

Product specification

Mono BTL audio amplifier with DC volume

control

TDA7052B

FUNCTIONAL DESCRIPTION

The maximum gain of the amplifier is fixed at 40.5 dB.

The DC volume control stage has a logarithmic control

characteristic. Therefore, the total gain can be controlled

from 40.5 dB to −33 dB. If the DC volume control voltage

falls below 0.4 V, the device will switch to the mute mode.

The TDA7052B and TDA7052BT are mono BTL output

amplifiers with DC volume control which have been

designed for use in TV and monitors but are also suitable

for use in battery-fed portable recorders and radios.

The amplifier is short-circuit proof to ground, V_Pand

across the load. Also a thermal protection circuit is

implemented. If the crystal temperature rises above

+150 °C the gain will be reduced, thereby reducing the

output power. Special attention is given to switch-on and

switch-off clicks, low HF radiation and a good overall

stability.

In conventional DC volume circuits the control or input

stage is AC coupled to the output stage via external

capacitors to keep the offset voltage low. In the TDA7052B

and TDA7052BT the DC volume control stage is integrated

into the input stage so that no coupling capacitors are

required. With this configuration, a low offset voltage is

maintained and the minimum supply voltage remains low.

The BTL principle offers the following advantages:

Power dissipation

• Lower peak value of the supply current

Assume for the TDA7052B that V_P= 6 V; R_L= 8 Ω.

The maximum sine wave dissipation is 0.9 W.

The R_{th j-a}of the package is 100 K/W.

• The frequency of the ripple on the supply voltage is twice

the signal frequency.

Therefore T_amb(max)= 150 − 100 × 0.9 = 60 °C.

Consequently, a reduced power supply with smaller

capacitors can be used which results in cost reductions.

For portable applications there is a trend to decrease the

supply voltage, resulting in a reduction of output power at

conventional output stages. Using the BTL principle

increases the output power.

Assume for the TDA7052BT that V_P= 6 V; R_L= 16 Ω.

The maximum sine wave dissipation is 0.46 W.

The R_{th j-a}of the package is 155 K/W.

Therefore T_amb(max)= 150 − 155 × 0.46 = 78 °C.

LIMITING VALUES

In accordance with the Absolute Maximum Rating System (IEC 134).

SYMBOL PARAMETER CONDITIONS

V_P

MIN.

MAX.

UNIT

supply voltage

−

V_{2, 4}

I_ORM

I_OSM

P_tot

input voltage pins 2 and 4

repetitive peak output current

non-repetitive peak output current

total power dissipation

TDA7052B

1.25

1.5

T_amb≤ 25 °C

−

1.25

0.8

°C

TDA7052BT

T_amb

T_stg

T_vj

operating ambient temperature

storage temperature

−40

−55

−

+85

+150

virtual junction temperature

short-circuit time

T_sc

−

THERMAL CHARACTERISTICS

SYMBOL

PARAMETER

VALUE

UNIT

R_{th j-a}

thermal resistance from junction to ambient in free air

TDA7052B

100

155

K/W

TDA7052BT

1997 Aug 15

1 2 345 6 7...16

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