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PDF TA8255AHQ Data sheet ( Hoja de datos )
| Número de pieza | TA8255AHQ | |
| Descripción | Max Power 22W BTL x 4ch Audio Power IC | |
| Fabricantes | Toshiba | |
| Logotipo |  |
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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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TA8255AHQ
5. Muting function: Pin(1), pin(25)
By means of controlling pin(25) (mute control terminal) less than about 1.5 V, it can make the IC muting
condition as below. However, pin(25) must not be connected to a certain voltage, for example, VCC, VDD, Vref, …
etc. In other words, pin(25) is inhibited to be pulled up, for instance fig 5 application.
The attenuation by the muting function is 70 dB (typ.). This muting is very smooth attenuating by the time
constant of pin(1): Smoothing.
Therefore, this function is suitable to the audio muting. The time for attenuation: Tatt is adjustable by changing
the capacitance of C3. But the tatt may influence the popping noise level.
So, please decide the time of tatt by testing on the units.
6. AUX. amplifier: Pin(16)
The pin(16) is for input terminal of AUX. amplifier.
The total gain is 0 dB by using of AUX. amplifier.
Therefore, the µ−con can directly drive the AUX. amplifier.
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TA8255AHQ
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11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet TA8255AHQ.PDF ] | |
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