TEA2025L-D16-T [UTC]

STEREO AUDIO AMPLIFIER; 立体声音频放大器


型号：	TEA2025L-D16-T
厂家：	Unisonic Technologies
描述：	STEREO AUDIO AMPLIFIER 立体声音频放大器音频放大器
文件：	总7页 (文件大小：199K)
中文：	中文翻译
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UNISONIC TECHNOLOGIES CO.,LTD.

TEA2025

LINEAR INTEGRATED CIRCUIT

STEREO AUDIO AMPLIFIER

DESCRIPTION

The UTC TEA2025 is a monolithic integrated audio amplifier in

a 16-pin plastic dual in line package. It is designed for portable

cassette players and radios.

FEATURES

*Working Voltage down to 3V

*Few External components

*High Channel isolation

*Voltage gain up to 45dB(Adjustable with external resistor)

*Soft clipping

DIP-16

*Internal Thermal protection

*Pb-free plating product number: TEA2025L

ORDERING INFORMATION

Order Number

Package

DIP-16

Packing

Tube

Normal

TEA2025-D16-T

Lead Free Plating

TEA2025L-D16-T

PIN CONFIGURATION

BRIDGE

16 +Vs

OUT.2

BOOT.2

GND

15 OUT.1

14 BOOT.1

13 GND

GND

12 GND

FEEDBACK

IN.2 (+)

SVR

11 FEEDBACK

10 IN.1 (+)

GND (sub)

www.unisonic.com.tw

QW-R107-033.B

TEA2025

LINEAR INTEGRATED CIRCUIT

BLOCK DIAGRAM

50Ω

10kΩ

THERMAL

PROTECTION

START

CIRCUIT

5kΩ

DECOUPLING

50Ω

10kΩ

50Ω

UNISONIC TECHNOLOGIES CO., LTD

www.unisonic.com.tw

QW-R107-033.B

TEA2025

LINEAR INTEGRATED CIRCUIT

ABSOLUTE MAXIMUM RATINGS (Ta = 25℃)

PARAMETER

SYMBOL

V_SS

RATINGS

UNIT

Supply Voltage

Peak Output Current

Junction Temperature

Operating Temperature

Storage Temperature

I_{O (peak)}

T_J

1.5

150

°C

℃

T_OPR

T_STG

-20 ~ +85

-40 ~ +150

℃

Note 1. Absolute maximum ratings are those values beyond which the device could be permanently damaged.

Absolute maximum ratings are stress ratings only and functional device operation is not implied.

2. The device is guaranteed to meet performance specification within 0℃~70℃ operating temperature range

and assured by design from –20℃~85℃.

ELECTRICAL CHARACTERISTICS (Ta=25℃, V_CC=9V, Stereo, unless otherwise specified.)

PARAMETER

SYMBOL

V_SS

TEST CONDITIONS

MIN

TYP

MAX UNIT

Supply Voltage

Quiescent Current

Quiescent Output Voltage

I_Q

4.5

V_OUT

Stereo

Bridge

Voltage Gain

G_V

Voltage Gain Difference

Input Impedance

ΔG_V

R_IN

+-1

2.3

1.3

kΩ

R_L=4Ω

f=1kHz,THD=10%, V_CC=9V

Stereo per channel

1.7

0.7

R_L=8Ω

R_L=4Ω

R_L=8Ω

R_L=4Ω

R_L=8Ω

R_L=4Ω

Stereo

Bridge

V_CC=6V

Output Power

P_OUT

0.6

0.1

4.7

2.8

0.3

0.5

V_CC=3V

Bridge, V_CC=9V

V_CC=6V

Total Harmonic

Distortion

V_CC=9V, R_L=4Ω, f=1kHz,P_OUT=250mW

1.5

THD

SVR

R_G=0,AV=45Db,V_RIPPLE=150mV

Supply Voltage Rejection

_RIPPLE=100Hz

R_G=0

1.5

Input Noise Voltage

Cross-Talk

A_V=200, Bandwidth:20Hz ~ 20kHz

μV

R_G=10kΩ

C.T.

R_G=10kΩ, f=1kHz,R_L=4Ω, P_OUT=1W

THERMAL CHARACTERISTICS

PARAMETER

SYMBOL

θ_JA

RATINGS

UNIT

℃/W

Thermal Resistance Junction to ambient

Thermal Resistance Junction to case

θ_JC

UNISONIC TECHNOLOGIES CO., LTD

www.unisonic.com.tw

QW-R107-033.B

TEA2025

LINEAR INTEGRATED CIRCUIT

APPLICATION INFORMATION

Input Capacitor

Input capacitor is PNP type allowing source to be referenced to ground. In this way no input coupling capacitor is

required. However, a series capacitor (0.22 uF)to the input side can be useful in case of noise due to variable

resistor contact.

Bootstrap

The bootstrap connection allows to increase the output swing. The suggested value for the bootstrap capacitors

(100uF) avoids a reduction of the output signal also at low frequencies and low supply voltages.

Voltage Gain Adjust

STEREO MODE （Figure 1）

The voltage gain is determined by on-chip resistors R1 and R2 together with the external RfC1 series connected

between pin 6 (11) and ground. The frequency response is given approximated by:

V_OUT

V_IN

R₁

JWC1

With R_f=0, C₁=100μF, the gain results 46 dB with pole at f=32 Hz.

THE purpose of Rf is to reduce the gain. It is recommended to not reduce it under 36 dB.

R₂

6 (11)

R_f

2 (15)

R₁

Figure 1

BRIDGE MODE (Figure 2)

The bridge configuration is realized very easily thanks to an internal voltage divider which provides (at pin 1) the

CH 1 output signal after reduction. It is enough to connect pin 6 (inverting input of CH 2) with a capacitor to pin 1 and

to connect to ground the pin 7.

The total gain of the bridge is given by:

and with the suggested values (C1 = C2 = 100 uF, R_f= 0) means: Gv = 52 dB with first pole at f = 32 Hz

UNISONIC TECHNOLOGIES CO., LTD

www.unisonic.com.tw

QW-R107-033.B

TEA2025

LINEAR INTEGRATED CIRCUIT

OUT

Figure 2

Output Capacitors

The low cut off frequency due to output capacitor depending on the load is given by:

with C_OUT470uF and R_L= 4 ohm it means F_L= 80Hz.

Pop Noise (Figure 3)

Most amplifiers similar to UTC TEA2025 need external resistors between DC outputs and ground in order to

optimize the pop on/off performance and crossover distortion.

OUT

800

Figure 3

The UTC TEA2025 solution allows to save components because of such resistors (800 ohm) are included into the

chip.

Stability

A good layout is recommended in order to avoid oscillations. Generally the designer must pay attention on the

following points:

- Short wires of components and short connections.

- No ground loops.

- Bypass of supply voltage with capacitors as nearest as possible to the supply I. C. pin. The low value (poliester)

capacitors must have good temperature and frequency characteristics.

- No sockets.

The heatsink can have a smaller factor of safety compared with that of a conventional circuit. There is no device

damage in the case of excessive junction temperature: all that happens is that P_O(and therefore P_tot) and Id are

reduced.

UNISONIC TECHNOLOGIES CO., LTD

www.unisonic.com.tw

QW-R107-033.B

TEA2025

LINEAR INTEGRATED CIRCUIT

TYPICAL APPLICATION CIRCUIT

Vcc

100

100 F

100

0.15

100

0.22

470

Vin

OUT1

100

0.15 F

100 F

0.15 F

0.22

100

Vin

OUT2

100

0.15

4,5,9,12,13

100 F

Fig. 4 Bridge Application

Fig.5 Stereo Application

SCHEMATIC DIAGRAM

UNISONIC TECHNOLOGIES CO., LTD

www.unisonic.com.tw

QW-R107-033.B

TEA2025

LINEAR INTEGRATED CIRCUIT

TYPICAL CHARACTERISTICS

UTC assumes no responsibility for equipment failures that result from using products at values that

exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or

other parameters) listed in products specifications of any and all UTC products described or contained

herein. UTC products are not designed for use in life support appliances, devices or systems where

malfunction of these products can be reasonably expected to result in personal injury. Reproduction in

whole or in part is prohibited without the prior written consent of the copyright owner. The information

presented in this document does not form part of any quotation or contract, is believed to be accurate

and reliable and may be changed without notice.

UNISONIC TECHNOLOGIES CO., LTD

www.unisonic.com.tw

QW-R107-033.B

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