TDA7266现货热卖使用介绍供应商报价哪里找芯片批发报价-中国IC网-芯三七

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产品型号TDA7266的概述

芯片TDA7266概述 TDA7266是一种高性能的音频功率放大器芯片，由意法半导体（STMicroelectronics）设计制造。此芯片广泛用于汽车音响、家用音响设备和便携式音响系统等应用。它的设计旨在提供优秀的音质和高效率，支持多种工作模式，能够驱动各种类型的扬声器。 TDA7266采用了先进的集成电路技术，不仅具有小型化特性，而且提升了功率输出能力。其内部结构包括多种保护电路，以防止短路、过热及过载等不良情况对设备造成损害。芯片通常支持从单电源供电，简化了电路设计，适合便携式设备的使用。 TDA7266的详细参数 TDA7266的主要电气参数如下： - 工作电压范围： 7 V 至 15 V - 输出功率：在 4Ω 负载下，最大输出功率可达到 2×10W；在 8Ω 负载下，最大可达 2×5W。 - 频率响应： 20 Hz 至 20 kHz, 通常具有良好的音质表现。 - 失真率...

产品型号TDA7266的Datasheet PDF文件预览

TDA7266

7+7W DUAL BRIDGE AMPLIFIER

TECHNOLOGY BI20II

WIDE SUPPLY VOLTAGE RANGE (3-18V)

MINIMUM EXTERNAL COMPONENTS

– NO SWR CAPACITOR

– NO BOOTSTRAP

– NO BOUCHEROT CELLS

– INTERNALLY FIXED GAIN

STAND-BY & MUTE FUNCTIONS

SHORT CIRCUIT PROTECTION

THERMAL OVERLOAD PROTECTION

Multiwatt 15

ORDERING NUMBER:

TDA7266

DESCRIPTION

The TDA7266 is a dual bridge amplifier specially

designed for TV and Portable Radio applications.

BLOCK AND APPLICATION DIAGRAM

470µF

100nF

0.22µF

IN1

OUT1+

ST-BY

S-GND

OUT1-

OUT2+

Vref

0.22µF

IN2

MUTE

OUT2-

PW-GND

D94AU175B

1/9

March 2002

TDA7266

ABSOLUTE MAXIMUM RATINGS

Symbol

Parameter

Value

Unit

V_S

I_O

Supply Voltage

Output Peak Current (internally limited)

Total Power Dissipation (T_case= 70°C)

Operating Temperature

P_tot

T_op

0 to 70

-40 to +150

°C

T_stg, T_j

Storage and Junction Temperature

THERMAL DATA

Symbol

Description

Value

Unit

R_{th j-case}Thermal Resistance Junction to case

Typ. 1.4

Max. 2

°C/W

PIN CONNECTION

(Top view)

OUT2+

OUT2-

VCC

IN2

N.C.

S-GND

PW-GND

ST-BY

MUTE

N.C.

IN1

V_CC

OUT1-

OUT1+

D95AU261

ELECTRICAL CHARACTERISTICS

specified.)

Ω

(V_CC= 11V, R_L= 8 , f = 1kHz, T_amb= 25 C unless otherwise

Symbol

V_CC

I_q

Parameter

Supply Range

Test Condition

Min.

Typ.

Max.

Unit

Total Quiescent Current

Output Offset Voltage

Output Power

V_OS

P_O

120

THD = 10%

6.3

THD

Total Harmonic Distortion

P_O= 1W

0.05

0.2

P_O= 0.1W to 2W

f = 100Hz to 15kHz

SVR

Supply Voltage Rejection

Crosstalk

f = 100Hz VR = 0.5V

°C

KΩ

A_MUTE

T_W

Mute Attenuation

Thermal Threshold

Closed Loop Voltage Gain

Voltage Gain Matching

Input Resistance

150

G_V

∆Gv

R_i

0.5

VT_MUTE

Mute Threshold

for V_CC> 6.4V; V_O= -30dB

for V_CC< 6.4V; V_O= -30dB

2.3

V_CC/2

-1

2.9

V_CC/2

-0.75

4.1

V_CC/2

-0.5

2/9

TDA7266

ELECTRICAL CHARACTERISTICS

(Continued)

A curve

Symbol

VT_ST-BY

I_ST-BY

e_N

Parameter

St-by Threshold

Test Condition

Min.

Typ.

Max.

Unit

0.8

1.3

1.8

ST-BY current V6 = GND

Total Output Noise Voltage

100

µA

µV

150

f = 20Hz to 20kHz

the amplifier, this to avoid "POP" and "CLICK" on

the outputs.

When this voltage reaches the St-by threshold

level, the amplifier is switched-on and the external

capacitors in series to the input terminals (C3,

C5) start to charge.

APPLICATION SUGGESTION

STAND-BY AND MUTE FUNCTIONS

(A) Microprocessor Application

In order to avoid annoying "Pop-Noise" during

Turn-On/Off transients, it is necessary to guaran-

tee the right St-by and mute signals sequence.

It is quite simple to obtain this function using a mi-

croprocessor (Fig. 1 and 2).

At first St-by signal (from mP) goes high and the

voltage across the St-by terminal (Pin 7) starts to

increase exponentially. The external RC network

is intended to turn-on slowly the biasing circuits of

It’s necessary to mantain the mute signal low until

the capacitors are fully charged, this to avoid that

the device goes in play mode causing a loud "Pop

Noise" on the speakers.

A delay of 100-200ms between St-by and mute

signals is suitable for a proper operation.

Figure 1:

Microprocessor Application

470µF

100nF

C1 0.22µF

IN1

OUT1+

R1 10K

ST-BY

10µF

S-GND

µP

OUT1-

OUT2+

Vref

C3 0.22µF

IN2

R2 10K

MUTE

1µF

OUT2-

PW-GND

D95AU258A

3/9

TDA7266

Figure 2:

Microprocessor Driving Signals.

+V_S(V)

+18

V_IN

(mV)

V_ST-BY

pin 7

1.8

1.3

0.8

V_MUTE

pin 6

4.1

2.9

2.3

I_q

(mA)

V_OUT

(V)

OFF

PLAY

MUTE

ST-BY

OFF

ST-BY

D96AU259

MUTE

external voltage divider.

(B) Low Cost Application

The device is switched-on/off from the supply line

and the external capacitor C4 is intended to delay

the St-by and mute threshold exceeding, avoiding

"Popping" problems.

In low cost applications where the mP is not pre-

sent, the suggested circuit is shown in fig.3.

The St-by and mute terminals are tied together

and they are connected to the supply line via an

4/9

TDA7266

Figure 3a:

Stand-alone Low-cost Application.

V_CC

470µF

100nF

C3 0.22µF

IN1

47K

OUT1+

ST-BY

47K

10µF

S-GND

OUT1-

OUT2+

Vref

C5 0.22µF

IN2

MUTE

OUT2-

PW-GND

D95AU260A

Figure 3b:

PCB and Component Layout of the Application Circuit (Fig. 1).

5/9

TDA7266

Figure 4:

Figure 5:

Distortion vs Output Power

THD (%)

THD(%)

Vcc = 11 V

Rl = 8 ohm

Vcc = 9V

Rl= 8 ohm

f = 15 KHz

f = 15KHz

0.1

f = 5 KHz

f = 1 KHz

f = 1KHz

0.010

0.1

0.010

0.1

Pout (W )

Figure 6:

Figure 7:

Distortion vs Frequency

Gain vs Frequency

THD(%)

Level(dBr)

5.0000

4.0000

3.0000

2.0000

1.0000

0.0

Vcc = 11V

Rl = 8 ohm

Pout = 1W

Vcc = 11 V

Rl = 8 ohm

-1.000

-2.000

-3.000

-4.000

Pout = 100mW

0.1

Pout = 2W

0.010

100

-5.000

10k

20k

100

10k

100k

frequency (Hz)

Figure 8:

Figure 9:

Output Power vs. Supply Voltage

Total Power Dissipation & Efficiency

vs. Output Power

Po(W)

20.000

µ(%)

Ptot(W)

18.000

16.000

14.000

12.000

10.000

8.0000

6.0000

4.0000

2.0000

Ptot

Rl = 8 ohm

f = 1KHz

d = 10%

Vcc = 11V

Rl = 8ohm (both channels)

f = 1KHz

d = 1%

0.0

0.5

1.5

2.5

3.5

4 4.5 5 5.5 6 6.5 7 7.5

2.000

4.000

6.000

8.000

10.00

12.00

14.00

16.00

18.00

2 X Pout(W)

Vs(V)

6/9

TDA7266

Figure 10:

Figure 11:

Stand-By Attenuation vs Vpin.7

Mute Attenuation vs. V pin.6

Attenuation (dB)

-10

-20

-30

-40

-50

-60

-70

-80

-90

-100

-110

-120

-10

-20

-30

-40

-50

-60

-70

-80

-90

-100

1.5

2.5

3.5

4.5

0.2 0.4 0.6 0.8

1.2 1.4 1.6 1.8

2.2 2.4

Vpin.6(V)

Vpin.7 (V)

Figure 12:

Quiescent Current vs. Supply Voltage

Iq (mA)

10 11 12 13 14 15 16 17 18

Vsupply(V)

7/9

TDA7266

inch

DIM.

OUTLINE AND

MIN. TYP. MAX. MIN. TYP. MAX.

MECHANICAL DATA

0.197

0.104

0.063

2.65

1.6

0.039

0.49

0.66

1.02

0.55 0.019

0.75 0.026

0.022

0.030

1.27

1.52 0.040 0.050 0.060

17.53 17.78 18.03 0.690 0.700 0.710

19.6

0.772

20.2

0.795

21.9

21.7

22.2

22.1

22.5 0.862 0.874 0.886

22.5 0.854 0.870 0.886

17.65

18.1 0.695

0.713

17.25 17.5 17.75 0.679 0.689 0.699

10.3

2.65

4.25

4.63

1.9

10.7

10.9 0.406 0.421 0.429

2.9 0.104 0.114

4.55

5.08

4.85 0.167 0.179 0.191

5.53 0.182 0.200 0.218

2.6

0.075

0.102

0.152

Dia1

1.9

Multiwatt15 V

3.65

3.85 0.144

8/9

TDA7266

Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences

of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is

granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are

subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products

are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.

The ST logo is a registered trademark of STMicroelectronics

STMicroelectronics GROUP OF COMPANIES

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Singapore - Spain - Sweden - Switzerland - United Kingdom - United States.

http://www.st.com

9/9

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