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TA8258HQのメーカーはToshiba Semiconductorです、この部品の機能は「Dual Audio Power Amplifier」です。 |
部品番号 | TA8258HQ |
| |
部品説明 | Dual Audio Power Amplifier | ||
メーカ | Toshiba Semiconductor | ||
ロゴ | |||
このページの下部にプレビューとTA8258HQダウンロード(pdfファイル)リンクがあります。 Total 12 pages
www.DataSheet4U.com
TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic
TA8258HQ
TA8258HQ
Dual Audio Power Amplifier
The TA8258HQ 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 Ω).
It is suitable for power amplifier of music center.
Features
• High output power: Pout = 20 W/channel (Typ.)
(VCC = 37 V, RL = 8 Ω, f = 1 kHz, THD = 10%)
• Low noise: Vno = 0.14 mVrms (Typ.)
Weight: 4.04 g (typ.)
(VCC = 37 V, RL = 8 Ω, GV = 34dB, Rg = 10 kΩ, 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 = 25°C)
: VCC (opr) = 15~42 V
The TA8258HQ is plated with lead-free lead finishes, but the silicon pellet is attached to a heatsink with
lead-containing solder paste.
About solderability, following conditions were confirmed
• Solderability
(1) Use of Sn-63Pb solder Bath
· solder bath temperature = 230°C
· dipping time = 5seconds
· the number of times = once
· use of R-type flux
(2) Use of Sn-3.0Ag-0.5Cu solder Bath
· solder bath temperature = 245°C
· dipping time = 5seconds
· the number of times = once
· use of R-type flux
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TA8258HQ
2. Muting
This product has an excellent muting system.
(1) 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 externally. 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.
Reference
voltage
The detection
circuit at
VCC → OFF
Q1
I1 I2
Dummy amp. Main amp.
I3 I4 I5 I6
I7
9
VCC
Q2 Q3
The
reference
voltage is
equal.
30 kΩ
Q5
Q7
Q6
Q4
Q10
Q9
Q8
Q11
20 kΩ
7/12
OUT
11
Mute
8
Mute. TC
2/4
IN
1/5
NF
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 characteristics, 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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TA8258HQ
Maximum Ratings (Ta = 25°C)
Characteristics
Symbol
Rating
Unit
Supply voltage
Output current (Peak/ch)
Power dissipation
Operation temperature
Storage temperature
VCC
IO (peak)
PD (Note 3)
Topr
Tstg
50
3.5
25
−20 to 75
−55 to 150
V
A
W
°C
°C
Note 3: Derated above Ta = 25°C in the proportion of 200 mW/°C.
Electrical Characteristics
(unless otherwise specified VCC = 37 V, RL = 8 Ω, Rg = 600 Ω, f = 1 kHz, Ta = 25°C)
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
Symbol
ICCQ
Pout (1)
Pout (2)
THD
GV
RIN
R.R.
Vno
C.T.
Mute-on
Mute-off
ATT
Test
Circuit
Test Condition
⎯ Vin = 0
⎯ THD = 10%
⎯ THD = 1%
⎯ Pout = 2 W
⎯ Vout = 0.775 Vrms (0dBm)
⎯⎯
⎯
fripple = 100 Hz
Vripple = 0.775 Vrms (0dBm)
⎯
Rg = 10 kΩ,
BW = 20 Hz~20 kHz
⎯
Rg = 10 kΩ,
Vout = 0.775 Vrms (0dBm)
⎯ Mute on
⎯ Mute off
⎯ Vout = 0.775 Vrms → Mute
Min Typ. Max Unit
⎯ 75 130
17 20 ⎯
⎯ 15 ⎯
⎯ 0.05 0.2
32.5 34.0 35.5
⎯ 30 ⎯
mA
W
%
dB
kΩ
−48 −60
⎯
dB
⎯ 0.14 0.3 mVrms
−50
GND
3.7
−50
−60
⎯
⎯
−60
⎯
1.4
10
⎯
dB
V
V
dB
Typ. DC Voltage of Each Terminal (VCC = 28 V, Ta = 25°C)
Terminal No. 1 2 3 4 5 6 7 8 9 10 11 12
DC voltage (V) 2.5 2.8 GND 2.8 2.5 12.5 19.4 5.1 VCC GND 4.8 19.4
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ページ | 合計 : 12 ページ | ||
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PDF ダウンロード | [ TA8258HQ データシート.PDF ] |
データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。 |
部品番号 | 部品説明 | メーカ |
TA8258H | Dual Audio Power Amplifier | Toshiba |
TA8258HQ | Dual Audio Power Amplifier | Toshiba Semiconductor |