TDA2050 - Unisonic Technologies Co., Ltd.

UNISONIC TECHNOLOGIES CO., LTD

TDA2050 LINEAR INTEGRATED CIRCUIT

www.unisonic.com.tw 1

32W HI-FI AUDIO POWER

AMPLIFIER

 DESCRIPTION

The UTC TDA2050 is a monolithic integrated circuit with high

power capability and is designed to use as an class AB audio

amplifier. It can deliver typically 50W music power into 4Ω load

over 1 sec at VS=22.5V, f = 1KHz.

The device is most suitable for both Hi-Fi and high class TV sets

on the strength of its high supply voltage and very low harmonic and

crossover distortion.

 FEATURES

* High output power (50W Music Power IEC 268.3 Rules)

* High operating supply voltage (50V)

* Single or split supply operations

* Very low distortion

* Short circuit protection (OUT to GND)

* Thermal shutdown

TO-220B

1

*Pb-free plating product number: TDA2050L

 ORDERING INFORMATION

Ordering Number

Normal Lead Free Plating Package Packing

TDA2050-TB5-T TDA2050L-TB5-T TO-220B Tube

 PIN CONFIGURATION

*TAB CONNECTED TO PIN 3

5

4

3

2

1

OUTPUT

+V

S

-V

S

INVERTING INPUT

NON INVERTING INPUT

TDA2050 LINEAR INTEGRATED CIRCUIT

UNISONIC TECHNOLOGIES CO., LTD 2

www.unisonic.com.tw QW-R107-036,A

 BLOCK DIAGRAM

21

3

4

5

SHORT

CIRC.

PROTECT.

SHORT

CIRC.

PROTECT.

V

REF

TDA2050 LINEAR INTEGRATED CIRCUIT

UNISONIC TECHNOLOGIES CO., LTD 3

www.unisonic.com.tw QW-R107-036,A

 ABSOLUTE MAXIMUM RATINGS

PARAMETER SYMBOL RATINGS UNIT

Supply Voltage VS ±25 V

Input Voltage VIN V

S

Differential Input Voltage VIN(DIFF) ±15 ℃

Output Peak Current (internally limited) IOUT 5 ℃

Power Dissipation TC= 75℃ PD 25 W

Junction Temperature TJ +125 ℃

Storage Temperature TSTG -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 –40℃~85℃.

 THERMAL DATA

PARAMETER SYMBOL RATINGS UNIT

Thermal Resistance junction-case θJC 3 ℃/W

 ELECTRICAL CHARACTERISTICS

(Refer to the Test Circuit, VS = ±18V, Ta = 25℃, f = 1 kHz, unless otherwise specified.)

PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT

Supply Voltage VS ±4.5 ±25 V

Quiescent Drain Current ID VS = ±4.5V

VS = ±25V 18

21

50

90 mA

Input Bias Current IB VS = ±22V 0.4 0.5 µA

Input Offset Voltage VIN(OS) VS = ±22V ±15 mV

Input Offset Current IIN(OS) VS = ±22V ±200 nA

D = 0.5%

RL = 4Ω

RL = 8Ω

RL = 8Ω, VS = ±22V

24

22

27

18

25

RMS Output Power

D = 10%

RL = 4Ω

RL = 8Ω

RL = 8Ω, VS = ±22V

35

22

32

Music Power IEC268.3 RULES

PO

D = 10%, T = 1s, VS = ±22.5V, RL = 4Ω 50

W

RL = 4Ω

f = 1kHz, PO = 0.1 ~ 24W

f = 100Hz ~ 10kHz, PO = 0.1 ~ 18W

0.03

0.5

Total Harmonic Distortion THD RL = 8Ω, VS = ±22V

f = 1kHz, PO = 0.1 ~ 20W

f = 100Hz ~ 10kHz, PO = 0.1 ~ 15W

0.02

0.5

%

Slew Rate SR 5 8 V/µs

Open Loop Voltage Gain GV 80 dB

Closed Loop Voltage Gain GV 30 30.5 31 dB

Power Bandwidth (-3dB) BW RL = 4Ω, VIN= 200mV 20 ~ 80000 Hz

Total Input Noise eN Curve A

B = 22Hz ~ 22kHz 4

5

10 µV

Input Resistance (pin 1) RIN 500 kΩ

Supply Voltage Rejection SVR RS = 22KΩ, f =100Hz, VRIPPLE =0.5Vrms 45 dB

PO = 28W, RL = 4Ω 65

Efficiency η PO = 25W, RL = 8Ω, VS = ±22V 67 %

TDA2050 LINEAR INTEGRATED CIRCUIT

UNISONIC TECHNOLOGIES CO., LTD 4

www.unisonic.com.tw QW-R107-036,A

 TYPICAL APPLICATION CIRCUIT

FOR SPLIT SUPPLY APPLICATION SUGGESTIONS

+

-

-V

S

R

L

R4

2.2Ω

C7

0.47μF

C3

100nF

C5

220μF

+V

S

R3

22kΩ

3

4

2

C4

100nF

C6

220μF

C2

22μF

R2

680Ω

1

C1

22μF

R1

22kΩ

5

UTC

TDA2050

V

IN

Figure.1 Split Supply Typical Application Circuit

The following table demonstrates the recommended values of the external components are those shown

on above circuit. Different values can be used.

RECOMMENDED VALUE

COMPONENT PURPOSE TYPICAL LARGER SMALLER

R1 Input Impedance 22kΩ Increase of Input Impedance Decrease of Input

Impedance

R2 Feedback Resistor 680Ω Decrease of Gain* Increase of Gain

R3 22kΩ Increase of Gain Decrease of Gain*

R4 Frequency Stability 2.2Ω Danger of Oscillations

C1 Input Decoupling DC 1µF Higher Low-frequency cut-off

C2 Inverting Input DC

Decoupling 22µF Increase of Switch ON/OFF

Noise Higher Low-frequency cut-off

C3, C4 Supply Voltage Bypass 100nF Danger of Oscillations

C5, C6 Supply Voltage Bypass 220µF Danger of Oscillations

C7 Frequency Stability 0.47µF Danger of Oscillations

* The gain must be higher than 24dB

TDA2050 LINEAR INTEGRATED CIRCUIT

UNISONIC TECHNOLOGIES CO., LTD 5

www.unisonic.com.tw QW-R107-036,A

 TYPICAL APPLICATION CIRCUIT(CONT.)

FOR SINGLE SUPPLY APPLICATION SUGGESTIONS

+

-

R

L

R6

2.2Ω

C6

0.47μF

C5

100nF

C3

1000μF

+V

S

R5

22kΩ

3

4

2

C4

22μF

R4

680Ω

1

C1

2.2μF

R3

22kΩ

5

UTC

TDA2050

IN

C7

1000μF

R2

22kΩ

C2

1000μF

R1

22kΩ

Figure.2 Single Supply Typical Application Circuit

The following table demonstrates the recommended values of the external components are those shown

on above circuit. Different values can be used.

RECOMMENDED VALUE

COMPONENT PURPOSE TYPICAL LARGER SMALLER

R1, R2, R3 Biasing Resistor 22kΩ

R4 Feedback Resistor 22kΩ Increase of Gain Decrease of Gain*

R5 680Ω Decrease of Gain* Increase of Gain

R6 Frequency Stability 2.2Ω Danger of Oscillations

C1 Input Decoupling DC 2.2µF Higher Low-frequency cut-off

C2 Supply Voltage

Rejection 100µF Worse Turn-off Transient

Worse Turn-on Delay

C3 Supply Voltage Bypass 1000µF Danger of Oscillations

Worse of Turn-off Transient

C4 Inverting Input DC

Decoupling 22µF Increase of Switch ON/OFF Higher Low-frequency cut-off

C5 Supply Voltage Bypass 100nF Danger of Oscillations

C6 Frequency Stability 0.47µF Danger of Oscillations

C7 Output DC Decoupling 1000µF Higher Low-frequency cut-off

* The gain must be higher than 24dB

NOTE: If the supply voltage is lower than 40V and the load is 8Ω(or more), a lower value of C2(i.e. 22µF) can be

used. C7 can be larger than 1000µF only if the supply voltage does not exceed 40V.

TDA2050 LINEAR INTEGRATED CIRCUIT

UNISONIC TECHNOLOGIES CO., LTD 6

www.unisonic.com.tw QW-R107-036,A

 TYPICAL CHARACTERISTICS (Split Supply Test Circuit, unless otherwise specified)

+

P

O

(W)

10 20

V

S

(V)

2550

15

20

25

30

15

R

L

= 8Ω

f = 1kHz

THD = 10%

10

5

0

Output Power vs. Supply Voltage

THD = 0.5%

P

O

(W)

10 20

V

S

(V)

2550

15

20

25

30

15

R

L

= 4Ω

f = 1kHz

THD= 10%

10

5

0

Output Power vs. Supply Voltage

THD= 0.5%

I

D

(mA)

10 20

V

S

(V)

2550

35

40

45

50

15

R

L

= 4Ω

30

25

20

Quiescent Current vs. Supply Voltage

P

D

(W)

10 20

P

O

(W)

2550

15

20

25

30

15

10

5

0

Total Power Dissipation and Efficiency

vs. Output Power

55

P

D

V

S

= 18V

R

L

= 4Ω

f = 1kHz

m

m (%)

35

30 35

30

40

50

60

20

10

0

70

80

P

D

(W)

10 20

P

O

(W)

2550

12

16

20

24

15

8

4

0

Total Power Dissipation and Efficiency

vs. Output Power

P

D

V

S

= 22V

R

L

= 8Ω

f = 1kHz

m

m (%)

28

30 35

30

40

50

60

20

10

0

70

80

35

40

30

4030

60

30

35

40

TDA2050 LINEAR INTEGRATED CIRCUIT

UNISONIC TECHNOLOGIES CO., LTD 7

www.unisonic.com.tw QW-R107-036,A

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.