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TA8227
LOW FREQUENCY POWER AMPLIFIER
TOSHIBA TA8227P
TOSHIBA BIPOLAR LINEAR INTEGRATED CIRCUIT SILICON MONOLITHIC
TA8227P
LOW FREQUENCY POWER AMPLIFIER
TA8227P is an audio power IC with built-in two channels
developed for portable radio cassette tape recorder with
power ON/OFF switch.
Because of the parts reduction and DIP (Dual Inline
Package), space merit is remarkable.
Thermal shut down protection circuit is built in.
FEATURES
It High Power
: Pout = 2.5W/CH (Typ.)
(Vcc = 9v, RL = 40, f = 1 kHz, THD = 10%)
: Pout = 3.0W/CH (Typ.) . HDIP12-P-300-2.54
(Vcc = 9V, RL = 3 n,f-- 1kHz, THD = 10%) Weight : 1.4g mm
It Voltage Gain : Gv = 45.0 dB (Typ.)
(Rf = 120 n, f =1kHz)
: Civ = 56.5 dB (Typ.)
(Rf = on, f =1kHz)
0 Small Quiescent Current : lcco = 21 mA (Typ.)
(VCC = 9V, VIN = 0)
It Ripple Rejection Ratio : R.R. = -52dB (Typ.)
(Vcc = 9V, fripple = 100 Hz, Rg = 600 Q)
It Cross Talk : CT. = -50di? (Typ.)
(VCC = 9V, f = 1kHZ, R9 = 600 Q)
It Output Noise Voltage : Vno = 0.3 mVrms (Typ.)
(VCC = 9V, R9 = 10 kn, BW = 20 Hz--20 kHz)
Stand-By Switch
Soft Clip
Built-in Thermal Shut Down Protection Circuit
Operation Supply Voltage Range : VCC(opr) = r-121/ (Ta = 25°C)
Low Popping Noise at Power ON
0 O O O O 0
Best for Supply Voltage 9V
98091 OEBA2
O TOSHIBA is continually working to improve the quality and the 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 observe standards of safety, and to avoid situations in which a malfunction or failure of a TOSHIBA product 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 products specifications. Also, please keep in mind the precautions and conditions set forth in the
TOSHIBA Semiconductor Reliability Handbook.
0 The products described in this document are subject to the foreign exchange and foreign trade laws.
0 The information contained herein is presented only as a guide for the ap Iications of our products. No responsibility is assumed by TOSHIBA
CORPORATION for any infringements of intellectual property or other rights 0 the third parties which may result from its use. No license is granted
b implication or otherwise under any intellectual property or other rights of TOSHIBA CORPORATION or others.
0 T e information contained herein is subject to change without notice.
1999-03-05 1/10
TOSHIBA TA8227P
BLOCK DIAG RAM
--------- rs - -
+ I SWI J, + O VCC1
BIAS CIRCUIT
RIPPLE PW. a
9 THERMAL SHUT DOWN ND I J,
+ PROTECTION CIRCUIT G -
ch-2 :
Pre-GND
APPLICATION INFORMATION AND APPLICATION METHOD
Adjustment of voltage gain
The voltage gain GV is obtained as follows by R1, R2
and Rf in Fig.1
Rf + R1 + R2 OUTPUT
G" 08og Rf + R1
When Rf = 0 0 GV = 56.5 dB (Typ.) CNF Q
When Rf = 120 n GV = 45dB (Typ.)
By increasing Rf, reduction of th, is possible. However,
since the feedback increase is liable to produce
oscillation, it is recommended to use this at 40 dB or
Thermal shut-down circuit
The thermal shut-down circuit is built in for the purpose of preventing the destruction of IC due to
the abnormal temperature rise when the heat radiation is insufficient.
The operation temperature is set at radiation Fin temperature 175°C (Typ.).
At this temperature or over the bias is interrupted to prevent the destruction of IC.
1999-03-05 2/10
TOSHIBA TA8227P
Input stage
The input circuit of this IC is as shown in Fig.2.
PNP Tr : Q1 is provided in the input circuit so as
to make its usage possible without the input
coupling capacitor.
However, at pints) and (2), max 60mV offset
voltage is produced.
Application after checking volume slide noise is
recommended.
For cutting the volume slide noise, insert the
input capacitor : CIN in series to interrupt the Rf
To DRIVER
DC component. +
Oscillation preventive measures
For oscillation preventive capacitor C6 and C7 Fig.2
between the output terminal and GND, it is
recommended to use polyester film capacitor
having good characteristics for temperature and
for high frequency.
Since the characteristics of the capacitor is liable to be influenced by the temperature, use this
capacitor after the temperature test to check the oscillation allowance.
In addition, as the position of the electrolytic capacitor has a remarkable influence on the
oscillation, connect C10 to VCC at the nearest possible position from power GND.
At using this application with the voltage gain reduced, oscillation is liable to be produced. Apply
the capacitor after checking enough for its capacity, type and mounting position.
(*) As the oscillation allowance varies according to the printed pattern layout the standard printed
board of TOSHIBA is recommended to be referred to design it.
Power ON/OFF switch
There is power ON/OFF switch at Pin(0. However, output power is changed by Pino) supply voltage
when Pino) supply voltage is not same Pin© supply voltage, after referring to attached date, select
Pin(0 supply voltage.
Input voltage
When the excessive signal is input, turning-up is produced in the clip waveform. The turning-up
point is Vin = 300 mVrms (Typ.) : VCC = 9V, RL = 40, f = 1 kHz : Enough care must be taken for
this phenomenon.
1999-03-05 3/10
TOSHIBA TA8227P
MAXIMUM RATINGS (Ta = 25°C)
CHARACTERISTIC SYMBOL RATING UNIT
DC Supply Voltage VCC 20 V
Output Current (Peak/CH) lo (peak) 2.5 A
Power Dissipation PD (Note) 4.0 W
Operating Temperature Top, -25--75 ''C
Storage Temperature Tstg - 55~150 ''C
(Note) Value for mounting on PC board (Refer to PD-Ta curve)
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, VCC = 9V, RL = 40, R9 = 600 O, f = 1 kHz, Ta = 25°C)
CHARACTERISTIC SYMBOL CIR- TEST CONDITION MIN. TYP. MAX. UNIT
Quiescent Current Icco - Vin = 0 - 21 45 mA
Pout(1) THD = 10% 2.0 2.5 -
Output Power Pout(2) - THD = 10%, RL = 3 n - 3.0 - W
Total Harmonic
- = - o
Distortion THD Pout 0.4W/CH 0.2 1.0 A)
Rf = 120 n
. Gv(1) Vout = 0.775 vrms (OdBm) 43 45 47
Voltage Gain - dB
Input Resistance RIN - - - 30 - kfl
Output Noise Voltage Vno - BW = 20 Hz--20 kHz - 0.3 1.0 mVrms
Ripple Rejection Ratio R.R. - Rg = 600 n, fripple = 100 Hz - -52 - dB
R9, = 600 n
Cross Talk C.T. - Vout = 0.775 Vrms (OdBm) - - 50 - dB
Input Offset Voltage V6, V7 - - - 30 60 mV
Stand-by Current Istb - SW1 -YOFF - 1 - pA
TYP. DC VOLTAGE OF EACH TERMINAL (VCC = 9v, Ta = 25°C)
TERMINAL No. 1 2 3 4 5 6 7 8 9 10 11 12
DC Voltage (V) VCC 4.5 8.7 GND 0.7 0.03 0.03 0.7 5.0 8.7 4.5 VCC
TOSHIBA TA8227P
TEST CIRCUIT
LL u I OOUT-1
011 1000 l _,
RIPPLE BIAS CIRCUIT PW- a
u, 9 THERMALSHUT DOWN GND 1
+ Q, PROTECTION CIRCUIT
"ts C9
ch-2 LU 'tl - O OUT-2
- Kl 1 1000 [IF -l
U) m n:
Pre-GND
(*1) This IC can be used without coupling capacitor (CIN). If volume slide noise occurred by
input offset voltage is undesirable, it needs to use the capacitor (CIN).
(*2) The condenser between the ©pin and the GND (C11) is for reducing pop noise when
the power ON/OFF switch (SW1) is set to ON/OFF.
1999-03-05 5/10
TOSHIBA TA8227P
Iccqz, " V10 - Vcc2 THD - Pout
A VCC1=12V tf'. Vcc1=9V
E Vin = o ‘CCQ 10 iii. fi RL = 49
3 Ta = 25°C 2 F- f=1kHz
u, 8 i 8 RNF = 120 n
s., tN :
- > 8 Ta = 25°C
a W lr,
Lu 6 0 -
C) L-, L)
U C) a
I- 4 > O
a 1- E
'dl 5 I
5 2 O _l
0 2 4 6 8 10 12 14 0.01 0.03 0.1 0.3 1 3 10
SUPPLY VOLTAGE VCC2 (V) OUTPUT POWER Pout (W)
THD - Ta 'CCQ, V2, V10 - Ta
'iii' VCC = 9 V
D 'i RL = 49 S"
if V Vin = 0 V
8 [i,' '
st, E 8,
YI 3 a
C) '- >
g b,' E
a' o o
- 40 - 20 0 20 40 60 80 100 - 40 - 20 0 20 40 60 80
AMBIENT TEMPERATURE Ta (°C) AMBIENT TEMPERATURE Ta (°C)
ICCQ. Vout - VCC
a te',
0 5 10 15 20
SUPPLY VOLTAGE VCC (V)
1999-03-05 6/10
TOSHIBA
TOTAL HARMONIC DISTORTION THD (%)
VOLTAGE GAIN Gv (d8)
RIPPLE REJECTION RATIO RR.
THD - Pout
Vcc=9V
RNF= 1200
f=10kHz
100 Hz
0.01 0.1 0.3 1 3 10 30
OUTPUT POWER Pout (W)
VCC =9V
RNF = 1200
30 100 1 k 10k 100 k
FREQUENCY f (Hz)
R.R. - Rg
VCC =9V
RL = 40
RNF = 1200
f=100Hz
30 100 1 k 10 k 100 k
SIGNAL SOURCE RESISTANCE Rg (Q)
TOTAL HARMONIC DISTORTION THD
RIPPLE REJECTION RATIO RVRV
cnoss TALK c1. (d8)
TA8227P
THD - Pout
f=1kHz
RL= 40
RNF = 1200
0.1 0.3 1 3 10
OUTPUT POWER Pout (W)
R.R. - f
Vcc=9V
Rg=6000
RNF= 1200
100 1k 10k 100k
FREQUENCY f (Hz)
C.T. - f
VCC = 9 V
RL = 40
R9 = 600 fl
RNF = 1200
Vout = 0.775 Vrms
(OdBm)
100 1 k 10 k 100 k
FREQUENCY f (Hz)
1999-03-05 7/10
TOSHIBA TA8227P
VCC = 9 V s? Vcc = 9V
RL = 40 E
Ei" f = 1 kHz V RL = 49
3 RNF=1ZOQ J' RNF=1ZOQ
F v = 0.775v
C. out (OdBm)’m5 u, BW = 20--20 kHz
'i' li
30 100 1k 10k 100k 30 100 1k 10k 100k
SIGNAL SOURCE RESISTANCE R9 (Q) SIGNAL SOURCE RESISTANCE R9 (Q)
Vcc - Pout PD - Pout
f=1kHz VCC=12V
THD = 1 D A
5 0% 5
o 5 7 9 11 13 15 17 19 o 1 2 3 4 5 6 7
SUPPLY VOLTAGE Vcc (V) OUTPUT POWER Pout (W)
PD - Pout
Ci?.'.'
0 1 2 3 4 5 6
OUTPUT POWER Pout (W)
1999-03-05 8/10
TOSHIBA
HEAT SINK
0.5 10.7
--lli'-' F''"-"-
MATERIAL : STEEL -l-W-'
UNIT : mm
PD - Ta
ALLOWABLE POWER DISSIPATION PD (W)
6 HEAT SINK+PCB
NO HEAT SINK
1 m. N
0 25 50 75 100 125 150
AMBIENT TEMPERATURE Ta (°C)
TA8227P
RECOMMENDED PCB LAYOUT
tIii]]
TOSHIBA
go: C),,
OUT1 GND VCC OUT2
_i'i',i,i,,',;',i",
PCB : EPOXY GLASS
80mm x 60mm x 1.2mm
1999-03-05 9/10
TOSHIBA TA8227P
OUTLINE DRAWING
HDIP12-P-300-2.54 Unit : mm
'Or-Ir-lf-'-"'-??-]))-]
|_IL_||_JL__._._..___!I_II_||_J
6.4i0.2
19.9MAX
19.4i0.2
. §i0.1
4 15:0 3
l . w,
I I I 5 9,
- ua. cri
I 3.6 l
0.81TYP 5.12 0.5iO.1
----H-f- _
" " 1.4i0.1
Weight : 1.4g (Typ.)
1999-03-05 10/10
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