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TA8258H
TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic
TA8258H
Dual Audio Power Amplifier
The TA8258H is dual audio power amplifier for consumer applications. This IC provides an output power of 20 watts per channel (at VCC = 37 V, f = 1kHz, THD = 10%, RL = 8 ). It is suitable for power amplifier of music center.
Features
* * * * * * * * High output power: Pout = 20 W/channel (Typ.) (VCC = 37 V, RL = 8 , f = 1 kHz, THD = 10%) Low noise: Vno = 0.14 mVrms (Typ.) (VCC = 37 V, RL = 8 , GV = 34dB, Rg = 10 k, BW = 20 Hz~20 kHz) Very few external parts. Built in audio muting circuit. Built in thermal shut down protector circuit. Built in output shifted to GND protection circuit. (AC short) Available for using same PCB layout with: TA8200AH, TA8211AH, TA8216H Operation supply voltage range (Ta = 25C) : VCC (opr) = 15~42 V Weight: 4.04 g (typ.)
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TA8258H
Block Diagram
VCC 6 Ripple Filter IN1 AMP1 5 3 1 9 VCC
IN1
4
OUT1
7 R RL
400 W Pre-GND 400 W
20 kW PW-GND 10 20 kW AMP2 12
C C R OUT2
RL
IN2
2 IN2 Mute. TC 8 Mute 11
Application Information
1. Voltage gain
The closed loop voltage gain is determined by R1, R2.
Input
R + R2 (dB) G V = 20 log 1 R2
4/2 5/1 R2 400 W R1 20 kW
Output
7/12
20 kW + 400 W = 20log 400 W = 34 (dB) R + R2 + R3 = 20 log 1 (dB) R2 + R3
Input
Figure 1
GV
When R3 = 220 W GV ~ 30 (dB) is given.
4/2 R3 5/1 R2 400 W R1 20 kW
Output
7/12
Figure 2
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TA8258H
2. Muting
This product has an excellent muting system. Audio muting This IC is possible to make audio muting operation by using 11 pin muting terminal. Figure 3 shows the equivalent circuit in the muting circuit. By reducing the voltage of 11 pin to 2.8 V or less, Q1 will be ON. Also the base voltage of Q2 in the differential circuit that has Q2 and Q3 will be down. When Q2 is OFF, I2 and I5 dummy circuits will be operated, and it will shut down the input. However, the bias circuit is operating after muting, and it takes power supply current at no signal. 8 pin is the capacitor terminal for reducing the pop noise, and it can make the time constant longer by inserting the capacitor externary. If 11 pin is not used, connect 11 pin and 8 pin, then set the voltage abode 4 V. (2) IC internal muting at VCC OFF When VCC = 8 V or less at VCC off, the detection circuit at VCC off is operated. And the base voltage of Q1 is reduced and the muting is operated in IC. (1)
Dummy amp.
Main amp. 9 VCC
Reference voltage The detection circuit at VCC (R) OFF Q1 100 W
I1
I2
I3
I4
I5
I6
I7
Q5
30 kW
30 kW
Q2
Q3
Q6 The reference voltage is equal. Q4
Q7
Q8
Q9
20 kW
7/12
OUT 400 W 1/5 NF
Q10
Q11
11 Mute
8 Mute. TC
2/4 IN
Figure 3
3. The Mounting Place of an Integrated Circuit
This IC cannot withstand the strong electromagnetic fields generated by a CRT. These are likely to cause the device to exhibit malfunctions such as leakage. Please ensure that the IC is kept away from CRT.
4. Preventive Measures Against Oscillation
To prevent oscillation, it is advisable to use capacitors made of polyester film, which have low temperature and frequency fluctuation daracteristics, as C. The resistance R in series with C performs phase correction at high frequencies and improves the oscillation allowance. (1) Capacitor rating and type (2) PCB layout
Note 1: Since the oscillation allowance varies according to the PCB layout, it is recommended that a standard Toshiba PCB be used as a reference for design.
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TA8258H
5. Heat-sink
Be aware of the heat-sink capacity. Use a heat-sink that has high heat conduction.
Note 2: Please connected a Heat-sink to GND potential, otherwise THD may deteriorate.
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TA8258H
Standard PCB
12 1
IN-2
GND
IN-1
TA8200AH/11AH/16H/58H
TOSHIBA
OUT2
OUT1
VCC
(bottom view)
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TA8258H
Maximum Ratings (Ta = 25C)
Characteristics Supply voltage Output current (Peak/ch) Power dissipation Operation temperature Storage temperature Symbol VCC IO (peak) PD (Note 3) Topr Tstg Rating 50 3.5 25 -20~75 -55~150 Unit V A W C C
Note 3: Derated above Ta = 25C in the proportion of 200 mW/C.
Electrical Characteristics
Characteristics Quiescent current Output power Total harmonic distortion Voltage gain Input resistance Ripple rejection ratio Output noise voltage Cross talk Mute on voltage Mute off voltage Mute ATT
(unless otherwise specified VCC = 37 V, RL = 8 9, Rg = 600 9, f = 1 kHz, Ta = 25C)
Symbol ICCQ Pout (1) Pout (2) THD GV RIN R.R. Vno C.T. Mute-on Mute-off ATT Test Circuit 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 3/4 Vin = 0 THD = 10% THD = 1% Pout = 2 W Vout = 0.775 Vrms (0dBm) 3/4 fripple = 100 Hz Vripple = 0.775 Vrms (0dBm) Rg = 10 kW, BW = 20 Hz~20 kHz Rg = 10 kW, Vout = 0.775 Vrms (0dBm) Mute on Mute off Vout = 0.775 Vrms (R) Mute Test Condition Min 3/4 17 3/4 3/4 32.5 3/4 -48 3/4 -50 GND 3.7 -50 Typ. 75 20 15 0.05 34.0 30 -60 0.14 -60 3/4 3/4 -60 Max 130 3/4 3/4 0.2 35.5 3/4 3/4 0.3 3/4 1.4 10 3/4 Unit mA W % dB kW dB mVrms dB V V dB
Typ. DC Voltage of Each Terminal (VCC = 28 V, Ta = 25C)
Terminal No. DC voltage (V) 1 2.5 2 2.8 3 GND 4 2.8 5 2.5 6 12.5 7 19.4 8 5.1 9 VCC 10 GND 11 4.8 12 19.4
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TA8258H
Test Circuit
1000 mF 47 mF VCC
6 Ripple Filter 4 IN1 AMP1 5 3 1 400 W Pre-GND 400 W 20 kW AMP2 2.2 mF 2 IN2 Mute. TC 8 10 mF *1 20 kW
9
2.2 mF 47 mF 47 mF
OUT1
1000 mF 2.2 W 7
PW-GND 10 2.2 W
0.12 mF 0.12 mF
RL
RL
OUT2 Mute 11
12
1000 mF
Vth ~ 2.8 V -
*1: The capacitor for reducing POP noise at mute ON.
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TA8258H
THD - Pout
100 VCC = 37 V 50 R = 8 W L 30 Filter 100: ~30 k 1 k: 400~30 k 10 k: 400~ 10 5 3 1 0.5 0.3 0.1 0.05 0.03 0.1 0.3 0.5 1 f = 10 kHz 100 Hz 1 kHz 100 50 30 10 5 3 RL = 8 W f = 1 kHz Filter: 400~30 k
THD - Pout
(%)
THD
Total harmonic distortion
Total harmonic distortion
THD
(%)
VCC = 15 V 1 0.5 0.3 0.1 0.05 0.03 0.1 0.3 0.5 1 3 5 10
37
42
3
5
10
30 50
100
30 50
100
Output power
POUT
(W)
Output power
POUT
(W)
THD - f
10 5 3 RL = 8 W Pout = 1 W VCC = 37 V Filter ~30 k (f = 20~800) 400~30 k (f = 1 k~2 k) 400~80 k (f = 4 k~6 k) 400~ (f = 8 k~40 k) 45
GV - f
RL = 8 W Vout = 0.775 Vrms VCC = 37 V
(%)
40
THD
1 0.5 0.3
(dB) GV Voltage gain
1k 3k 10k 30k 100k
35
Total harmonic distortion
30
0.1 0.05 0.03 0.01 30 OUT2 OUT1
25
20
100
300
15 20 30
100
300
1k
3k
10k
30k
100k
Frequency f
(Hz)
Frequency f
(Hz)
R.R. - f
0 -10 -20 -30 -40 -50 -60 -70 -80 OUT2 Rg = 620 W RL = 8 W Vripple = 0.775Vrms VCC = 37 V -30
R.R. - Rg
fripple = 100 Hz RL = 8 W Vripple = 0.775Vrms VCC = 37 V
Ripple rejection ratio R.R. (dB)
Ripple rejection ratio R.R. (dB)
-40
-50
OUT1
-60
OUT2 OUT1
-70
30
100
300
1k
3k
10k
30k
100k
-80
30
100
0.3
1k
3k
10k
30
100k
Frequency f
(Hz)
Singnal source resistance
Rg
(W)
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TA8258H
C.T. - f
0 -10 Rg = 620 kW RL = 8 W VCC = 37 V -30
C.T. - Rg
f = 1 kHz RL = 8 W VCC = 37 V Vout = 0.775Vrms
C.T. (dB)
-30 -40 -50 -60 -70 -80 OUT2 (R) OUT1
C.T. (dB) Cross talk
-20
-40
-50
Cross talk
-60
OUT2 (R) OUT1 OUT1 (R) OUT2
-70 OUT1 (R) OUT2 30 100 300 1k 3k 10k 30k 100k -80 30 100 300 1k 3k
10k
30k
100k
Frequency f
(Hz)
Singnal source resistance
Rg
(W)
Vno - Rg
800 35 RL = 8 W VCC = 37 V B.W = 20Hz~20kHz 30 f = 1 kHz RL = 8 W THD = 10 %
Pout - VCC
(mVrms)
700 600 500 400 300 200
Pout (W) Output power
OUT2 OUT1 30 100 300 1k 3k 10k 30k 100k
25 20 15 10 5 0 10
Output noise voltage
VNO
100 0
5
10
15
20
25
30
35
40
45
Singnal source resistance
Rg
(W)
Supply voltage VCC
(V)
ICCQ, VOUT - VCC
120 RL = 8 W VCC = 37 V Vin = 0 80 40 60 25
PD - POUT
42 V f = 1 kHz RL = 8 W
(mA)
(V)
Output DC voltage VOUT
(W)
100
20 37 V 15
ICCQ
Quiescent current
60 ICCQ 40 VOUT 20
Power dissipation
PD
10
20
5 15 V
0 0
10
20
30
40
50
0 60
0 0
5
10
15
20
25
Supply voltage VCC
(V)
Output power Pout
(W)
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TA8258H
ATT - Vmute
10 f = 1 kHz RL = 8 W Vout = 0.775Vrms VCC = 37 V RL = 8 W VCC = 37 V f = 1 kHz Pout = 2 W
THD - Ta
Mute ATT (dB)
Total harmonic distoriont
-20
THD
0
(%)
0.2 0.1 0.05 0.03
-40
OUT2 OUT1
-60
-80 8
1
2
3
4
0.01 -40
-20
0
20
40
60
80
100
Mute control voltage
Vmute
(V)
Ambient temperature Ta (C)
R.R. - Ta
0 Rg = 620 W -10 -20 -30 -40 -50 -60 -70 -80 -40 OUT2 RL = 8 W Vripple = 0.775 Vrms VCC = 37 V fripple = 100 Hz 100
ICCQ - Ta
VCC = 37 V RL = 8 W
Ripple rejection ratio R.R. (dB)
(mA) ICCQ Quiescent current
OUT1
80
60
40
20
-20
0
20
40
60
80
100
0 -40
-20
0
20
40
60
80
100
Ambient temperature Ta (C)
Ambient temperature Ta (C)
PD MAX - Ta
30
(w)
1: INFINITE HEAT SINK 25 1 2: 4.1C/W A HEAT SINK 3: 9.5C/W A HEAT SINK
Allowable power dissipation PD MAX
20 2 15 3
10
5
0 0
25
50
75
100
125
150
175
Ambient temperature Ta (C)
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TA8258H
Package Dimensions
Weight: 4.04 g (typ.)
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RESTRICTIONS ON PRODUCT USE
000707EBF
* 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.
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