Datasheet TA8256H Specification

TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic

TA8256BH

Audio Power Amplifier 6 W × 3 Ch

TA8256BH is 3 channel audio power amplifier for Consumer

applications.

This IC provides an output power of 6 watts per channel

(at V

Features

= 20 V, f = 1 kHz, THD = 10%, RL = 8 Ω).

CC

It is suitable for power amplifier of TV and home Stereo.

TA8256BH

· High output power: P
(V

· Built-in audio muting circuit.

· NF terminal capacitor less

: Fixed gain (G

· Protectors
: Thermal shut down protection circuit, over voltage protection circuit

· Low poping noise

· High THD ratio

· High input dynamic range

· Available for using same PCB layout with 2 channel IC: TA8246AH

· Operating supply voltage range

: V

= 20 V、RL = 8 Ω、f = 1 kHz、THD = 10%)

CC

v

CC (opr)

= 10~30 V (Ta = 25°C)

= 6 W (Typ.)

out

= 34dB), needless external capacitor.

Weight: 4.04 g (typ.)

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Block Diagram

INPUT1

RIPPLE FILTER
4 kW

4

6 9

Amp 1

30 kW

OUT1

TA8256BH

VCC

8

RL

RL

RL

INPUT2

INPUT3

3

2

1

350 W

350 W

4 kW

4 kW

20 kW

V

18

20 kW

Amp 2

30 kW

Amp 3

30 kW

20 kW350 W

5 7

PW-GNDPre-GND

2.1 V

MUTE T.C.MUTE SW

OUT2

OUT3

10

12

11

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Terminal Explanation

A

TA8256BH

Terminal

No.

1 IN3

2 IN2

4 IN1

3 Pre-GND GND terminal ¾

5 MUTE SW

Symbol Function Equivalent Circuit

1, 2, 4

4 kW

Input

IN

30 kW

7

MUTE control terminal

10 kW

5

VCC

20 kW

350 W

NF

GND

VCC

to MUTE

mplifier

OUT

7 MUTE T.C.

6 R/F Ripple filter

6 to Bias circuit

8 OUT1

11 OUT3

12 OUT2

Output

9 VCC Supply voltage terminal ¾

10 PW-GND GND terminal ¾

GND

10 kW

to POP-NOIZE
preventive circuit

5.1 kW

VCC

8, 11, 12

OUT

2.2 kW
GND

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TA8256BH

Cautions

This IC is not proof enough against a strong E-M field by CRT which may cause malfunction such as leak.
Please set the IC keeping the distance from CRT.

Maximum Ratings

Characteristic Symbol Rating Unit

Supply voltage VCC 30 V
Output current (peak/ch) I
Power dissipation PD (Note) 25 W
Operating temperature T
Storage temperature T

(Ta ==== 25°C)

Note: Derated above Ta = 25°C in the proportion of 200 mW/°C.

Electrical Characteristics

(Unless otherwise specified, VCC ==== 20 V, RL ==== 8 WWWW, Rg ==== 620 WWWW, f ==== 1 kHz, Ta ==== 25°C)

2 A

O (peak)

-20~75 °C

opr
stg

-55~150 °C

Characteristic Symbol

Quiescent current I

Output power

Total harmonic distortion

Voltage gain Gv ¾ V
Input resistance RIN ¾ ¾ ¾ 34 ¾ kW

Ripple rejection ratio R.R. ¾

Output noise voltage Vno ¾

Cross talk C.T. ¾ V

Mute control voltage

Mute attenuation level ATT ¾ V

CCQ

P

(1) ¾ THD = 10% 5 6 ¾

out

(2) ¾ THD = 1% ¾ 4.5 ¾

P

out

THD (1) ¾ P
THD (2) ¾ P

V

th (ON)

V

th (OFF)

Test

Circuit

¾ Vin = 0 65 100 180 mA

f = 100 Hz,
V

Rg = 10 kW,
BW = 20 Hz~20 kHz

¾ MUTE ON 3.1 ¾ V

¾ MUTE OFF 0 ¾ 2.5

Test Condition Min. Typ. Max Unit

= 2 W ¾ 0.04 0.2

out

= 2 W, f = 10 kHz, ¾ 0.1 0.6

out

= 0.775 Vrms 32.5 34 35.5 dB

out

= 0.775 Vrms

ripple

= 0.775 Vrms ¾ -60 ¾ dB

out

= 0.775 Vrms ® Mute -52 -60 ¾ dB

out

-40 -47 ¾ dB

¾ 0.14 0.3 mVrms

CC

W

%

V

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Test Circuit

TA8256BH

VCC

INPUT1

INPUT2

INPUT3

1.0 mF

1.0 mF

1.0 mF

100 mF

RIPPLE FILTER

4 kW

4

350 W

3

350 W

4 kW

2

4 kW

1

6 9

Amp 1

30 kW

20 kW

V

18

20 kW

Amp 2

30 kW

Amp 3

30 kW

20 kW350 W

5 7

1000 mF

1000 mF

8

OUT1

2.2 W

PW-GNDPre-GND

2.1 V

MUTE T.C.MUTE SW

OUT2

OUT3

10

2.2 W

12

11

2.2 W

0.10 mF

0.10 mF

1000 mF

1000 mF

0.10 mF

RL

RL

RL

10 mF

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TA8256BH

)

300

I

CCQ

(mA)

200

CCQ

100

Quiescent current I

0

4

0 12 8 16 20 24 32 28 36

Supply voltage VCC (V)

30

VCC = 20 V
RL = 8 W

10

5

3

1

0.5

0.3

Total harmonic distortion THD (%)

0.1

0.05

0.03

f = 10 kHz

f = 1 kHz

0.01

0.3

0.5 1 3 5 10 30

Output Power P

, V

out (DC)

THD – P

f = 100 Hz

– VCC

30 10

(V)

20

V

out (DC

I

CCQ

10

0

out (DC)

Output voltage V

out

(W) Output Power P

out

VCC = 20 V

5

P

= 2 W

out

3

RL = 8 W

1

0.5

0.3

0.1

0.05

0.03

Total harmonic distortion THD (%)

0.01
30

100

30

f = 1 kHz
RL = 8 W

10

5

3

1

0.5

0.3

0.1

Total harmonic distortion THD (%)

0.05

0.03

0.01

VCC = 12 V 20 28

0.3

0.5 1 3 5 10 30

THD – f

300 1 k 3 k 10 k 30 k 100 k

Frequency f (Hz)

THD – P

out

out

(W)

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TA8256BH

20

f = 1 kHz

18

RL = 8 W
THD = 10%

16
14

(W)

out

12
10

8
6

Output power P

4
2
0

10 30 34 32 3836

Supply voltage VCC (V)

0

VCC = 20 V
RL = 8 W

-10

Rg = 0
V

= 0.775 Vrms

ripple

-20

-30

-40

-50

Ripple rejection ratio R.R. (dB)

-60

-70

30

100

300 1 k 3 k 10 k 30 k 100 k

Frequency f (Hz)

1.6
VCC = 20 V

)

RL = 8 W

1.4

rms

BW = 20 Hz~20 kHz

1.2

(mV

no

1.0

0.8

0.6

0.4

0.2

Output noise voltage V

0

30

100

300 1 k 3 k 10 k 30 k 100 k

Signal source resistance Rg (9)

P

out

22 26 24 28 14 18 16 20 12

R.R. – f

V

no

– VCC

– Rg

– f

G

70

VCC = 20 V
V

= 0.775 Vrms

60

out

RL = 8 W

50

(dB)

v

40

30

20

Voltage gain G

10

0

30

100

v

300 1 k 3 k 10 k 30 k 100 k

Frequency f (Hz)

C.T. – f

0

VCC = 20 V
RL = 8 W

-10

V

= 0.775 Vrms

out

Rg = 10 kW

-20

-30

-40

-50

Cross talk C.T. (dB)

-60

-70

30

100

300 1 k 3 k 10 k 30 k 100 k

Frequency f (Hz)

0

R.R. – R

VCC = 20 V
RL = 8 W

-10

f

= 100 Hz

ripple

V

= 0.775 Vrms

ripple

-20

-30

-40

-50

Ripple rejection ratio R.R. (dB)

-60

-70

30

100

300 1 k 3 k 10 k 30 k 100 k

Signal source resistance Rg (9)

g

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TA8256BH

0

VCC = 20 V
f = 1 kHz

-10

RL = 8 W
V

= 0.775 Vrms

out

-20

-30

-40

-50

Cross talk C.T. (dB)

-60

-70

30

100

300 1 k 3 k 10 k 30 k 100 k

Signal source resistance Rg (9)

20

f = 1 kHz

18

(W)

Maximum power dissipation P

RL = 8 W

16

D (max)

14
12
10

8
6
4
2
0

8 32

Supply voltage VCC (V)

0.8

VCC = 20 V

0.7

Rg = 10 kW

0.6

(mVrms)

no

0.5

0.4

0.3

0.2

0.1

Output noise voltage V

0

-40 100

Ambient temperature Ta (°C)

C.T. – R

MAX – VCC

P

D

– Ta

V

no

g

24 28 16 2012

– P

18

P

Dual
f = 1 kHz

16

RL = 8 W

14

(W)

12

D

VCC = 28 V

10

8

20 V

6

4

Power dissipation P

12 V

2

0

0810 1612

624

Output power P

D

out

THD = 1%

(W)

out

– Ta

I

180

VCC = 20 V

160

Vin = 0

140

(mA)

120

CCQ

100

80

60

40

Quiescent current I

20

0

-40 100

Ambient temperature Ta (°C)

CCQ

40 60 020-20

10%

14

80

THD – Ta

10

VCC = 20 V

5

RL = 8 W
f = 1 kHz

3

P

= 2 W

out

Dual

1

40 60 0 20 -20

80

0.5

0.3

0.1

0.05

0.03

Total harmonic distortion THD (%)

0.01

-40 10040 60 020-20 80

Ambient temperature Ta (°C)

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TA8256BH

30

1

25

MAX (W)

D

20

2

15

3

10

5

Allowable power dissipation P

0

0 100 125 200150 75 25 50 175

Ambient temperature Ta (°C)

MAX – Ta

P

D

1: Infinite heat sink
2: 4.1°C/W heat sink
3: 9.5°C/W heat sink

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Package Dimensions

TA8256BH

Weight: 4.04 g (typ.)

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TA8256BH

RESTRICTIONS ON PRODUCT USE

· TOSHIBA is continually working to improve the quality and reliability of its products. Nevertheless, semiconductor
devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical
stress. It is the responsibility of the buyer, when utilizing TOSHIBA products, to comply with the standards of
safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of
such TOSHIBA products could cause loss of human life, bodily injury or damage to property.
In developing your designs, please ensure that TOSHIBA products are used within specified operating ranges as
set forth in the most recent TOSHIBA products specifications. Also, please keep in mind the precautions and
conditions set forth in the “Handling Guide for Semiconductor Devices,” or “TOSHIBA Semiconductor Reliability
Handbook” etc..

· The TOSHIBA products listed in this document are intended for usage in general electronics applications
(computer, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances,
etc.). These TOSHIBA products are neither intended nor warranted for usage in equipment that requires
extraordinarily high quality and/or reliability or a malfunction or failure of which may cause loss of human life or
bodily injury (“Unintended Usage”). Unintended Usage include atomic energy control instruments, airplane or
spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments,
medical instruments, all types of safety devices, etc.. Unintended Usage of TOSHIBA products listed in this
document shall be made at the customer’s own risk.

· This product generates heat during normal operation. However, substandard performance or malfunction may
cause the product and its peripherals to reach abnormally high temperatures.
The product is often the final stage (the external output stage) of a circuit. Substandard performance or
malfunction of the destination device to which the circuit supplies output may cause damage to the circuit or to the
product.

000707EBF

· The products described in this document are subject to the foreign exchange and foreign trade laws.

· The information contained herein is presented only as a guide for the applications of our products. No

responsibility is assumed by TOSHIBA CORPORATION for any infringements of intellectual property or other
rights of the third parties which may result from its use. No license is granted by implication or otherwise under
any intellectual property or other rights of TOSHIBA CORPORATION or others.

· The information contained herein is subject to change without notice.

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2002-02-13

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