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TA8255AHQのメーカーはToshibaです、この部品の機能は「Max Power 22W BTL x 4ch Audio Power IC」です。 |
部品番号 | TA8255AHQ |
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部品説明 | Max Power 22W BTL x 4ch Audio Power IC | ||
メーカ | Toshiba | ||
ロゴ | |||
このページの下部にプレビューとTA8255AHQダウンロード(pdfファイル)リンクがあります。 Total 15 pages
TA8255AHQ
TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic
TA8255AHQ
Max Power 22W BTL × 4ch Audio Power IC
The TA8255AHQ is 4ch BTL audio power amplifier for consumer
application.
It is designed low distortion ratio for 4ch BTL audio power
amplifier, Built−in stand−by function, muting function and
junction temperature detection circuit.
Additionally, the AUX. amplifier is built−in, it can make the beep
signal etc. Output to 2 channels (out1 and 4).
It contains various kind of protectors for car audio.
Features
Weight: 9.8g (typ.)
• High power
: POUT (max) = 22 W (typ.)
(VCC = 13.7 V, f = 1 kHz, RL = 4 Ω)
: POUT (1) = 17 W (typ.)
(VCC = 14.4 V, f = 1 kHz, THD = 10%, RL = 4 Ω)
: POUT (2) = 14 W (typ.)
(VCC = 13.2 V, f = 1 kHz, THD = 10%, RL = 4 Ω)
• Low distortion ratio
: THD = 0.02% (typ.)
(VCC = 13.2 V, f = 1 kHz, POUT = 3 W, RL = 4 Ω)
• Low noise
: VNO = 0.10 mVrms (typ.)
(VCC = 13.2 V, Rg = 0 Ω, GV = 34 dB, BW = 20~20 kHz)
• Built−in stand−by switch function (pin(2))
• Built−in muting function (pin(1), (25))
• Built−in AUX. amplifier from single input to 2 channels output (pin(16))
• Built−in junction temperature detection circuit (pin(24))
: Pin(24) DC voltage rises at about + 10 mV / °C in proportion to junction temperature.
• Built−in various protection circuit
: Thermal shut down, Over voltage, Out to GND, Out to VCC, Out to Out short
• Operating supply voltage
: VCC (opr) = 9~18 V
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1 Page TA8255AHQ
Caution And Application Method
(description is made only on the single channel.)
1. Voltage gain adjustment
This IC has no NF (negative feedback) terminals. Therefore, the voltage gain can’t adjusted, but it makes the
device a space and total costs saver.
The voltage gain of amp. 1: GV1 = 0 dB
The voltage gain of amp. 2A, B: GV2 = 28 dB
The voltage gain of BTL connection: GV (BTL) = 6 dB
Therefore, the total voltage gain is decided by expression below.
GV = GV1 + GV2 + GV (BTL) = 0 + 28 + 6 = 34 dB
2. Stand−by SW function
By means of controlling pin(2) (stand−by terminal) to high
and low, the power supply can be set to on and off.
The threshold voltage of pin(2) is set at about 3V (typ.),
and the power supply current is about 100 µA (typ.) at the
stand−by state.
Control voltage of pin(2): V (SB)
Stand−by
Power
On Off
Off On
V (SB) (V)
0~2
3~VCC
Adjustage of stand−by SW
(1) Since VCC can directly be controlled to on or off by the
microcomputer, the switching relay can be omitted.
(2) Since the control current is microscopic, the switching relay of small current capacity is satisfactory for
switching
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3Pages TA8255AHQ
The amplified signal from pin(16) is out to the out1 and 4.
7. Cross talk
The cross talk characteristics of the IC is not good between out1 and 2, out3 and 4.
So we recommend to use by below method.
Out1, 2
Out3, 4
L−ch (or R−ch)
R−ch (or L−ch)
And, please refer to below table in case of applying the AUX. in because it is out to out1 and 4.
ex)
Out1
Out2
Out3
Out4
Front
Rear
Rear
Fromt
L−ch (or R−ch)
R−ch (or L−ch)
AUX. out
—
—
AUX. out
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6 Page | |||
ページ | 合計 : 15 ページ | ||
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PDF ダウンロード | [ TA8255AHQ データシート.PDF ] |
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部品番号 | 部品説明 | メーカ |
TA8255AH | MAX POWER 22W BTL x 4CH AUDIO POWER IC | Toshiba |
TA8255AHQ | Max Power 22W BTL x 4ch Audio Power IC | Toshiba |