Datasheet TA8208H Specification

TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic

TA8208H

5.8W Dual Audio Power Amplifier

The TA8208H are dual audio power amplifier for consumer
applications.
It is designed for high power, low distortion and low noise.
It also contains various kind of protectors.
It is suitable for car−audio power amplifier with high
performance.

P

= 5.8W (typ.) / ch

OUT

(V

= 13.2V, f = 1kHz, THD = 10%, RL = 4Ω)

CC

Features

· Low distortion
: THD = 0.06% (typ.)

(VCC = 13.2V, f = 1kHz, P

· Low noise
: V

= 0.7mV

NO

(VCC = 13.2V, RL = 4Ω, GV = 52dB, Rg = 10kΩ, BW = 20Hz~20kHz)

· Protector circuit
: Thermal shut down, over voltage protection.

Out−VCC short, Out−GND short and Out−Out short protection.

· Operation supply voltage range
: V

CC (opr.)

= 9~18V

rms

(typ.)

OUT

= 1W, RL = 4Ω, GV = 52dB)

Weight: 4.04g (typ.)

TA8208H

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TA8208H

Block Diagram

Caution And Application Method

1. Voltage gain adjustment

The voltage gain G
and R

in Fig.1.

f

=l

In case of R

The voltage gain is set as follows:

2. Muting

Audio muting can be accomplished by connecting pin (6) (ripple filter) to GND as shown in Fig.2.
Then, the bias circuits are cut off.
However, caution must be exercised to the following items.
(1) The recovery time from the muting operation is determined by the capacities of the ripple filter capacitor

between (6) pin and GND, and of the capacitor for NF.

(2) As this muting system is operated by the short-circuit of ripple filter: C5, the ripple rejection ratio becomes

worse in the muting condition.
At mute on, some pop noises of breaking the bias are produced.

= 0

f

G

= 52dB (typ.)

V

is determined by R1, R2

V

R 1R fR

++

2

og20 VG

(dB)

R fR

+

1

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TA8208H

3. Measures against oscillation

C7, C8, C9: The capacitor of polyester film having small variation of the temperature characteristics is

recommended as the capacitor for oscillation prevention.

R5: Increases the oscillation allowance at output clippling of the low range frequency (100Hz or less).
Since the oscillation allowance varies according of the following items, carry out the temperature test to confirm
the oscillation allowance.

(1) Gain to be used (G
(2) Capacity of capacitor
(3) Kinds of capacitor

(4) Layout of printed board
It is recommended to use the capacitor having the capacity exceeding the oscillation stopping value.
At using with the voltage gain G
be produced.
Therefore, application with G
Especially for using with the gain lowered in dual operation, insert 1000pF between NF (2 pin and 4 pin) and
GND.
This capacitor reduces the gain of the high range frequency and is effective for oscillation prevention.

4. Output waveform at power supply on / off (reference)
Amplifier DC output waveforms in the condition of V
in Fig.3.

The popping time at power supply on / off varies according to the rise and fall times.
The condition in which the power supply is rapidly and repeatedly made on / off, that is, the condition in which
the charge is made on the external capacitor of IC is different from the conditions shown is Fig.3.

setting)

V

lowered or with the high range frequency and the oscillation becomes liable to

V

= 40dB or over is advisable.

V

= 13.2V, RL = 4Ω at non-signal (input short) are shown

CC

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TA8208H

Maximum Ratings

Characteristic Symbol Rating Unit

Peak supply voltage (0.2s) V

DC supply voltage V

Operating supply voltage V

Output current (peak) I

Power dissipation PD 25 W

Operating temperature T

Storage temperature T

(Ta = 25°C)

(surge) 45 V

CC

25 V

CC (DC)

18 V

CC (opr)

4.5 A

O (peak)

-30~85 °C

opr

-55~150 °C

stg

Electrical Characteristics

(unless otherwise specified, VCC = 13.2V, RL = 4

Test

Characteristic Symbol

Quiescent current I

Output power P

Total harmonic
distortion

Voltage gain GV — V

Voltage gain ratio ∆GV — V

Output noise voltage VNO —

Ripple rejection ratio R.R. —

Cross talk C.T. — V

Input resistance RIN — f = 1kHz — 33 — kΩ

CCQ

OUT

THD — P

Cir-

cuit

— VIN = 0 — 80 145 mA

— THD = 10% 5 5.8 — W

OUT

OUT

OUT

R

g

BW = 20Hz~20kHz

f

ripple

V

ripple

OUT

Ω, Rg = 600Ω, f = 1kHz,

Test Condition Min. Typ. Max. Unit

= 1W — 0.06 0.30 %

= 0.775V

= 0.775V

= 10kΩ

= 100Hz

= 0.775V

= 0.775V

(0dBm) 50 52 54 dB

rms

(0dBm) -1 0 1 dB

rms

(0dBm)

rms

(0dBm) — -57 — dB

rms

Ta = 25°C)

— 0.7 1.5 mV

— -52 -40 dB

Typical DC Voltage Of Each Terminal

(VCC = 13.2V, VIN = 0V, Ta = 25°C)

rms

Terminal no. 1 2 3 4 5 6 7 8 9 10 11 12

DC voltage (V) 1.5 1.5 GND 1.5 1.5 6.4 6.4 12.3 GND VCC 12.3 6.4

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Test Circuit / Application Circuit

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Package Dimensions

Weight: 4.04g (typ.)

TA8208H

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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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