TA8217P
2002-10-30
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TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic
TA8217P
Dual Audio Power Amplifier
TA8217P is dual audio power amplifier designed for the audio
power amplifier of portable radio cassette tape recorder.
Features
· High output power: Pout = 2.5W (typ.)
(VCC = 9V, RL = 4Ω, f = 1kHz, THD = 10%)
· Soft clip
· Built−in thermal shutdown protection circuit
· Wide operating supply voltage range
: VCC = 4.5~12V (Ta = 25°C)
Block Diagram
Weight: 1.4g (typ.)
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2002-10-30
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Precautions For Use And Application
(1) Input stage
The input stage of power amplifier is comprised of a PNP differential pair preceded by a PNP emitter follower
which allows DC referencing of the source signal to ground. This eliminates the need for an input coupling
capacitor. However, in case the brush noise of volume becomes a problem, provide serially a coupling capacitor
to the input side.
(2) Adjustment of voltage gain
The voltage gain is fixed at Gv≒56.5dB by the resistors
(R1 and R2) in IC, however, its reduction is possible through
adding Rf as shown in Fig.1. In this case, the voltage gain is
obtained by the following equation.
Gv≒20ℓog
f
R
1
R
f
R
2
R
1
R
+
++
It is recommeded to use this IC with the voltage gain of Gv = 40dB or over.
(3) Measures against oscillation
For the capacitors C6 and C7 to be applied for preventing the oscillation between output terminal and GND,
use the polyester film capacitor having superior quality in high frequency and temperature characteristics,
however, since the characteristics of the capacitor may be different depending on the manufactures or kinds,
apply the capacitor after confirmation.
Since the characteristics of the capacitor of the ceramic type are liable to be affected by the temperature and
the voltage, use the capacitor of larger capacity and be sure to perform the thermal test to check the oscillation
allowance.
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2002-10-30
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Maximum Ratings (Ta = 25°C)
Characteristic Symbol Rating Unit
Supply voltage VCC 20 V
Power dissipation
(package limitation)
PD (Note1) 4.0 W
Output current IO 2.5 A
Operating temperature Topr -20~75 °C
Storage temperature Tstg -55~150 °C
(Note 1) Value for mounting on PC board (refer to PD-Ta curve)
Electrical Characteristics
(unless otherwise specified, VCC = 9V, RL = 4Ω, Rg = 600Ω, f = 1kHz, Ta = 25°C)
Characteristic Symbol
Test
Cir-
cuit
Test Condition Min. Typ. Max. Unit
Quiescent current ICCQ ― V
in = 0 ― 23 55 mA
Pout (1) THD = 10% 2.0 2.5 ―
Pout (2) THD = 10%, RL = 3Ω ― 2.9 ―
Output power
Pout (3)
―
THD = 10%, VCC = 6V ― 1.0 ―
W
Total harmonic
distortion THD ― P
out = 0.4W, Gv = 45dB ― 0.2 1.2 %
Gv (1) Rf = 82Ω,
Vout = 0.775Vrms (0dBm) 43 45 47
Voltage gain
Gv (2)
―
Rf = 0,
Vout = 0.775Vrms (0dBm) ― 56 ―
dB
Cross talk C.T. ― Rg = 600Ω,
Vout = 0.775Vrms (0dBm) ― -60 ― dB
Ripple rejection ratio R.R. ―
Rg = 600Ω,
Vripple = 0.245Vrms (-10dBm)
fripple = 100Hz
― -52 -45 dB
Output noise voltage VNO ― Rg = 10Ω, GV = 45dB
BW = 20~20kHz ― 0.35 1.0 mVrms
Input resistance RIN ― ― ― 30 ― kΩ
Input offset voltage V5,V8 ― V
in = 0 ― 20 ― mV
Typ. DC Voltage Of Each Terminal (VCC = 9V, Ta = 25°C by test circuit)
Terminal no. 1 2 3 4 5 6 7 8 9 10 11 12
DC voltage (V) 8.1 4.5 8.8 0.6 0.02 8.9 0 0.02 0.6 8.8 4.5 9.0
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2002-10-30
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Test Circuit
(*) CX is a ripple filter capacitor for transition duration when supply voltage and pin(1) voltage are inverted.
(**) For C6 and C7, it is advised to use polyester film capacitor having superior quality in the characteristics of high
frequency and temperature.
TA8217P
2002-10-30
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TA8217P
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TA8217P
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TA8217P
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Heat Sink Recommended PCB Layout
PCB: Epoxy glass
80mm × 60mm × 1.2mm
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Package Dimensions
Weight : 1.4g (typ.)
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2002-10-30
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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.
· 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.
000707EB
A
RESTRICTIONS ON PRODUCT USE
