TA8264AH

2002-02-13

1

TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic

TA8264AH

Max Power 41 W BTL × 4 ch Audio Power IC

The TA8264AH is 4 ch BTL audio power amplifier for car audio

application.

This IC can generate more high power: P

OUT

MAX = 41 W as it

is included the pure complementary PNP and NPN transistor
output stage.

It is designed low distortion ratio for 4 ch BTL audio power

amplifier, built-in stand-by function, muting function, and
diagnosis circuit which can detect output to V

CC

/GND short and

over voltage input mode.

Additionally, the AUX amplifier and various kind of protector

for car audio use are built-in.

Features

· High power : P

OUT

MAX (1) = 41 W (typ.)

(V

CC

= 14.4 V, f = 1 kHz, JEITA max, R

L

= 4 Ω)

:

P

OUT

MAX (2) = 37 W (typ.)

(V

CC

= 13.7 V, f = 1 kHz, JEITA max, R

L

= 4 Ω)

:

P

OUT

(1) = 24 W (typ.)

(V

CC

= 14.4 V, f = 1 kHz, THD = 10%, R

L

= 4 Ω)

:

P

OUT

(2) = 21 W (typ.)

(V

CC

= 13.2 V, f = 1 kHz, THD = 10%, R

L

= 4 Ω)

· Built-in diagnosis circuit (pin 25)
· Low distortion ratio: THD = 0.02% (typ.)

(V

CC

= 13.2 V, f = 1 kHz, P

OUT

= 5 W, R

L

= 4 Ω)

· Low noise: V

NO

= 0.18 mV

rms

(typ.)

·

(V

CC

= 13.2 V, R

g

= 0 Ω, G

V

= 34dB, BW = 20 Hz~20 kHz)

· Built-in stand-by switch function (pin 4)
· Built-in muting function (pin 22)
· Built-in AUX amplifier from single input to 2 channels output (pin 16)
· Built-in various protection circuit

: Thermal shut down, over voltage, out to GND, out to V

CC

, out to out short, speaker burned

· Operating supply voltage: V

CC (opr)

= 9~18 V

Weight: 7.7 g (typ.)

TA8264AH

2002-02-13

2

Block Diagram

R

L

R

L

R

L

11

9

8

7

5

2

3

17

18

19

21

24

23

12

15

14

1

20

6

R

L

IN1

IN2

IN3

AUX IN

IN4

13

16

C

1

C

1

C

1

C

1

PRE-GND

10

25

4

22

OUT1 (

+)

PW-GND1

OUT1 (

-)

OUT2 (

+)

PW-GND2

OUT2 (

-)

OUT3 (

+)

PW-GND3

OUT3 (

-)

OUT4 (

+)

PW-GND4

OUT4 (

-)

TAB

V

CC1

V

CC2

C

3

R

1

C

4

C

2

: PRE-GND

: PW-GND

STBY

DIAGNOSIS

OUT

RIP MUTE

C

5

C

6

TA8264AH

2002-02-13

3

Caution and Application Method

(Description is made only on the single channel.)

1. Voltage

Gain

Adjustment

This IC has no NF (negative feedback) terminals. Therefore, the voltage gain can’t adjusted, but it makes

the device a space and total costs saver.

The voltage gain of Amp.1

: G

V1

= 8dB

The voltage gain of Amp.2A, B

: G

V2

= 20dB

The voltage gain of BLT Connection : G

V (BTL)

= 6dB

Therefore, the total voltage gain is decided by expression below.

G

V

= G

V1

+ G

V2

+ G

V (BTL)

= 8 + 20 + 6 = 34dB

2. Stand-by SW Function

(pin 4)

By means of controlling pin 4 (stand-by terminal) to

high and low, the power supply can be set to ON and
OFF. The threshold voltage of pin 4 is set at about
3V

BE

(typ.), and the power supply current is about 2

mA (typ.) at the stand-by state.

Control Voltage of pin 4: V

SB

Stand-by Power V

SB

(V)

ON OFF

0~1.5

OFF ON

3~V

CC

Adjustage of Stand-by SW

(1) Since

V

CC

can directly be controlled to ON or OFF by the microcomputer, the switching relay can be

omitted.

(2) Since the control current is microscopic, the switching relay of small current capacity is satisfactory

for switching

Amp. 1

Input

Amp. 2A

Amp. 2B

Figure 1 Block Diagram

Figure 2 With pin 4 set to High,

Power is turned ON

ON

4

OFF

10 k

W

to BIAS
CUTTING CIRCUIT

» 2V

BE

V

CC

Power

TA8264AH

2002-02-13

4

3. Muting

Function

(pin 22)

By means of controlling pin 22 less than 0.5 V, it can make the audio muting condition.
The muting time constant is decided by R

1

and C

4

and these parts is related the pop noise at power

ON/OFF.

The series resistance; R1 must be set up less than 10 kW to get enough muting attenuation.

The muting function have to be controlled by a transistor, FET and micro-controller port which has

I

MUTE

> 250 mA ability.

Pin 22 terminal voltage has the temperature characteristics of 4.6 V (low temperature) to 3.2 V (high

temperature).

Therefore, it is need to design with attention as using the micro-controller of which operating voltage is

less than 5 V.

Terminal 22 may not be pulled up and shall be controlled by OPEN/LOW.
When it is obliged to do, it must be pulled up via diode, because it has to defend flowing reverse current

to internal circuit of pin 22.

V

CC

Small current capacity switch

BATTERY

Stand-By

V

CC

DIRECTLY FROM
MICROCOMPUTER

BATTERY

Stand-By

– Stand-by Switch Method –

Figure 3

– Conventional Method –

V

CC

Large current capacity switch

BATTERY

V

CC

FROM
MICROCOMPUTER

BATTERY

RELAY

Figure 5 Mute Attenuation

---- V

MUTE

(V)

Point A voltage: VMUTE (V)

ATT – V

MUTE

Mut

e

a

tte

nu

ati

o

n A

T

T

(dB

)

10 k

W

5 k

W

VCC = 13.2 V

Po = 10 W

PL

= 4 W

f

= 1 kHz

-100

0

0.4

0.8 1 1.2

1.6 2 2.4 2.8

3

-80

-60

-40

-20

0

20

Figure 4 Muting Function

R

1

I (100

mA)

22

I

MUTE

I

MUTE (OFF)

A

V

MUTE

C

4

<Recommended Application>

<Application for pulled up>

R

1

I (100

mA)

22

I

MUTE

I

MUTE (OFF)

V

MUTE

C

4

TA8264AH

2002-02-13

5

4. AUX

Input

(pin 16)

The pin 16 is for input terminal of AUX

amplifier.

The total gain is 0dB by using of AUX amplifier.
Therefore, the m-COM can directly drive the

AUX amplifier.

BEEP sound or voice synthesizer signal can be

input to pin 16 directly.

When AUX function is not used, this pin must be

connected to PRE-GND (pin 13) via a capacitor.

5.

Diagnosis Output

(pin 25)

This diagnosis output terminal of pin 25 has open collector output structure on chip as shown in Figure 7.

In case diagnosis circuit that detect unusual case is operated, NPN transistor (Q1) is turned on.
It is possible to protect all the system of apparatus as well as power IC protection.

In case of being unused this function, use this IC as open-connection on pin 25.

5.1

In Case of Shorting Output to V

CC

/GND or Over Voltage Power Supplied

NPN transistor (Q1) is turned on.
Threshold of over voltage protection: V

CC

= 22 V (typ.)

5.2

In Case of Shorting Output to Output

NPN transistor (Q1) is turned on and off in response to the input signal voltage.

25

5 V

LED/LCD

ALARM

REGULATOR → OFF

(Flashing)

(Announcement from a speaker.)

(Relay → OFF)

m-COM

MEMORY (Count and record)

Figure 8 Application 1

Figure 6 AUX Input

20dB AMP.

IN

OUT (

+)

OUT (

-)

16

AUX-IN

-

20dB

AUX AMP

m-COM

Figure 7 Self Diagnosis Output

pin 25: Open collector output (active low)

OUTPUT SHORT

PROTECTOR

OVER VOLTAGE

PROTECTOR

25

Q1

5 V

Q1 is turned on

GND

5 V

t

TA8264AH

2002-02-13

6

6. Prevention of speaker burning accident

(In Case of Rare Short Circuit of Speaker)

When the direct current resistance between OUT + and OUT - terminal becomes 1 W or less and output

current over 4 A flows, this IC makes a protection circuit operate and suppresses the current into a speaker.

This system makes the burning accident of the speaker prevent as below mechanism.

<The guess mechanism of a burning accident of the speaker>

Abnormal output offset voltage (voltage between OUT + and OUT -) over 4 V is made by the external

circuit failure.(Note 1)

¯

The speaker impedance becomes 1 W or less as it is in a rare short circuit condition.

¯

The current more than 4 A flows into the speaker and the speaker is burned.

Note 1: It is appeared by biased input DC voltage

(for example, large leakage of the input capacitor, short-circuit between copper patterns of PCB.)

Current into a speaker

Speaker impedance

Less than 4

W

Figure 9

About 1

W

4

W

Operating point of protector

TA8264AH

2002-02-13

7

6.1 Applications

When output terminals short-circuit to V

CC

or GND, the voltage of 25pin is fixed to “L”.

And when shorting OUT + to OUT -, “L” and “H” are switched according to an input signal.

Therefore, it is possible to judge how the power IC condition is if a micro-controller detects the

25pin voltage that is smoothed out with LPF.

It is recommend that the threshold voltage (Vth) is set up as higher as possible because output level

of LPF is changed according to an input signal.
(for example, Vth is set up to 4 V if 25pin is pulled up to 5 V line.)

Output voltage of L.P.F.

Output power

5 V

Figure 10

Operating point of protector

TA8264AH

2002-02-13

8

Maximum Ratings

(Ta

==== 25°C)

Characteristics Symbol

Rating

Unit

Peak supply voltage (0.2 s)

V

CC (surge)

50 V

DC supply voltage

V

CC (DC)

25 V

Operation supply voltage

V

CC (opr)

18 V

Output current (peak)

I

O (peak)

9 A

Power dissipation

P

D

(Note 2)

125

W

Operation temperature

T

opr

-40~85 °C

Storage temperature

T

stg

-55~150 °C

Note 2: Package thermal resistance

q

j-T

= 1°C/W (typ.)

(Ta

= 25°C, with infinite heat sink)

Electrical Characteristics

(unless otherwise specified V

CC

==== 13.2 V, f ==== 1 kHz, R

L

==== 4

9

9

9

9

, Ta

==== 25°C)

Characteristics Symbol

Test

Circuit

Test Condition

Min

Typ.

Max

Unit

Quiescent current

I

CCQ

¾

V

IN

= 0

¾ 200 400

mA

P

OUT

MAX (1)

¾

V

CC

= 14.4 V, max Power

¾ 41 ¾

P

OUT

MAX (2)

¾

V

CC

= 13.7 V, max Power

¾ 37 ¾

P

OUT

(1)

¾

V

CC

= 14.4 V, THD = 10%

¾ 24 ¾

Output power

P

OUT

(2)

¾ THD

= 10%

19

21

¾

W

Total harmonic distortion

THD

¾

P

OUT

= 5 W

¾ 0.02 0.2 %

Voltage gain

G

V

¾

V

OUT

= 0.775 Vrms (0dBm)

32

34

36

Voltage gain ratio

DG

V

¾

V

OUT

= 0.775 Vrms (0dBm)

-1.0 0 1.0

dB

V

NO

(1)

¾ Rg

= 0 W, DIN45405

¾ 0.20 ¾

Output noise voltage

V

NO

(2)

¾ Rg

= 0 W, BW = 20 Hz~20 kHz

¾ 0.18 0.42

mVrms

Ripple rejection ratio

R.R.

¾

f

rip

= 100 Hz, Rg = 620 W

V

rip

= 0.775 Vrms (0dBm)

40 50

¾ dB

Cross talk

C.T.

¾

Rg

= 620 W

V

OUT

= 0.775 Vrms (0dBm)

¾ 60 ¾ dB

Output offset voltage

V

OFFSET

¾

¾

-150 0 +150

mV

Input resistance

R

IN

¾

¾

¾ 30 ¾

k

W

Stand-by current

I

SB

¾ Stand-by

condition

¾ 2 10 mA

V

SB

H

¾ Power:

ON

3.0

¾

V

CC

Stand-by control voltage

V

SB

L

¾ Power:

OFF

0

¾ 1.5

V

V

M

H

¾ Mute:

OFF

Open

¾

Mute control voltage

(Note 3)

V

M

L

¾

Mute: ON, R

1

= 10 kW 0

¾ 0.5 V

Mute attenuation

ATT M

¾

Mute: ON,
V

OUT

= 7.75 Vrms (20dBm) at

Mute:

OFF.

80 90

¾ dB

Note 3: Muting function have to be controlled by open and low logic, which logic is a transistor, FET and

m-COM port

of I

MUTE

> 250

m

A ability.

This means than the mute control terminal : pin 22 must not be pulled-up.

TA8264AH

2002-02-13

9

Test Circuit

R

L

R

L

R

L

11

9

8

7

5

2

3

17

18

19

21

24

23

12

15

14

1

20

6

R

L

IN1

IN2

IN3

IN4

13

C

1

C

1

C

1

C

1

PRE-GND

10

25

4

22

OUT1 (

+)

PW-GND1

OUT1 (

-)

OUT2 (

+)

PW-GND2

OUT2 (

-)

OUT3 (

+)

PW-GND3

OUT3 (

-)

OUT4 (

+)

PW-GND4

OUT4 (

-)

TAB

V

CC1

V

CC2

C

3

R

1

C

4

1

m

F

C

2

: PRE-GND

: PW-GND

STBY

DIAGNOSIS

OUT

RIP MUTE

3900

m

F

0.22

mF

0.22

mF

0.22

mF

10

m

F

10 k

W

C

5

0.

1

m

F

0.22

mF

AUX IN

16

0.22

mF

C

6

TA8264AH

2002-02-13

10

Qui

e

s

c

en

t

cu

rr

ent

I

CCQ

(m

A

)

Output power P

OUT

(W)

T.H.D – P

OUT

T

o

ta

l

ha

rm

oni

c

di

st

or

ti

on

T

.H

.D

(%

)

Power supply voltage VCC (V)

I

CCQ

– V

CC

Frequency f (Hz)

T.H.D – f

T

o

ta

l

ha

rm

oni

c

di

st

or

ti

on

T

.H

.D

(%

)

Output power P

OUT

(W)

T.H.D – P

OUT

T

o

ta

l

ha

rm

oni

c

di

st

or

ti

on

T

.H

.D

(%

)

10

0

30

0

400

20

100

200

300

RL = ¥

VIN = 0

100

10

100 k

0.001

1

1 k

0.01

0.1

10 k

OUT2, 3

VCC = 13.2 V
RL = 4 W
Pout = 5 W

OUT3

OUT4

0.1

100

0.01

1

0.1

f

= 1 kHz

RL = 4 W

1

10

10

100

13.2 V

16.0 V

9.0 V

0.1

100

0.01

1

0.1

VCC = 13.2 V
RL = 4 W

1

10

10

100

10 kHz

1 kHz

100 Hz

TA8264AH

2002-02-13

11

Cr

o

s

s

t

a

lk

C.T

. (

d

B)

Cr

o

s

s

t

a

lk

C.T

. (

d

B)

Singnal source resistance Rg (9)

V

NO

– R

g

Outp

ut noi

s

e

v

o

lt

a

ge

V

NO

(m

V

rms

)

Frequency f (Hz)

R.R. – f

R

ippl

e

rej

e

cti

on

rati

o R

.R

. (

d

B

)

Frequency f (Hz)

C.T. – f (OUT1)

Cr

o

s

s

t

a

lk

C.T

. (

d

B)

Frequency f (Hz)

C.T. – f (OUT2)

Frequency f (Hz)

C.T. – f (OUT3)

Frequency f (Hz)

C.T. – f (OUT4)

Cr

o

s

s

t

a

lk

C.T

. (

d

B)

100

10

100 k

-70

0

1 k

-60

-30

10 k

-40

-20

-50

-10

VCC = 13.2 V

RL = 4 W

Rg = 620 W

Vrip = 0dBm

100

10

100 k

-70

0

1 k

-60

-30

10 k

-40

-20

-50

-10

VCC = 13.2 V

RL = 4 W

VOUT = 0dBm

Rg = 620 W

OUT1

® OUT2, 3, 4

100

10

100 k

-70

0

1 k

-60

-30

10 k

-40

-20

-50

-10

OUT2

® OUT1, 3, 4

VCC = 13.2 V

RL = 4 W

VOUT = 0dBm

Rg = 620 W

100

10

100 k

-70

0

1 k

-60

-30

10 k

-40

-20

-50

-10

OUT3

® OUT4

OUT3

® OUT1, 2

VCC = 13.2 V

RL = 4 W

VOUT = 0dBm

Rg = 620 W

100

10

100 k

1 k

10 k

-70

0

-60

-30

-40

-20

-50

-10

OUT4

® OUT1, 2, 3

VCC = 13.2 V

RL = 4 W

VOUT = 0dBm

Rg = 620 W

100

10

100 k

0

300

1 k

50

200

10 k

100

150

250

VCC = 13.2 V
RL = 4 W
BW

= 20 Hz~20 kHz

TA8264AH

2002-02-13

12

Frequency f (Hz)

G

V

– f

V

o

lt

ag

e g

a

in

G

V

(dB

)

Output power P

OUT

/ch (C)

P

D

– POUT

P

o

w

e

r di

ssi

p

a

ti

on

P

D

(

W

)

Ambient temperature Ta (°C)

P

D

MAX – Ta

A

llo

w

abl

e p

o

w

e

r di

s

s

ipati

o

n

P

D

MA

X

(W

)

①

②

③

25

0

150

0

120

75

60

100

40

20

80

100

50 125

① INFINITE HEAT SINK

R

qJC = 1°C/W

② HEAT SINK (R

qHS = 3.5°C/W)

R

qJC + RqHS = 4.5°C/W

③ NO HEAT SINK

R

qJA = 39°C/W

100

10

100 k

0

40

1 k

5

20

10 k

15

25

10

30

35

VCC = 13.2 V

RL = 4 W

VOUT = 0dBm

0

10

40

30

50

20

60

70

5

15 20

10

25

0

9 V

13.2 V

16 V

f

= 1 kHz

RL = 4 W

TA8264AH

2002-02-13

13

Package Dimensions

Weight: 7.7 g (typ.)

TA8264AH

2002-02-13

14

· 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.

· 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.

000707EBF

RESTRICTIONS ON PRODUCT USE

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