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PDF TA8251AHQ Data sheet ( Hoja de datos )

Número de pieza TA8251AHQ
Descripción MAX POWER 30W BTL x 4CH AUDIO POWER IC
Fabricantes Toshiba Semiconductor 
Logotipo Toshiba Semiconductor Logotipo



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No Preview Available ! TA8251AHQ Hoja de datos, Descripción, Manual

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TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic
TA8251AHQ
TA8251AHQ
Max Power 30W BTL × 4ch Audio Power IC
The TA8251AHQ is 4ch BTL audio power amplifier for consumer
application.
It is designed low distortion ratio for 4ch BTL audio power
amplifier, builtin standby function, muting function and
junction temperature detection circuit. Additionally, the AUX.
amplifier is builtin, it can make the beep signal etc. Output to 2
channels (out1 and 4).
It contains various kind of protectors for car audio.
Features
High power
: POUT (max) = 30W (typ.)
(VCC = 13.7V, f = 1kHz, RL = 4)
Weight: 9.8g (typ.)
: POUT (1) = 21W (typ.)
(VCC = 14.4V, f = 1kHz, THD = 10%, RL = 4)
: POUT (2) = 18W (typ.)
(VCC = 13.2V, f = 1kHz, THD = 10%, RL = 4)
Low distortion ratio
: THD = 0.02% (typ.)
(VCC = 13.2V, f = 1kHz, POUT = 3W, RL = 4)
Low noise
: VNO = 0.10mVrms (typ.)
(VCC = 13.2V, Rg = 0, GV = 34dB, BW = 20~20kHz)
Builtin standby switch function (pin(2))
Builtin muting function (pin(1), (25))
Builtin AUX. amplifier from single input to 2 channels output (pin(16))
Builtin junction temperature detection circuit (pin(24))
: Pin(24) DC voltage rises at about +10mV / °C in proportion to junction temperature.
Builtin various protection circuit
: Thermal shut down, Over voltage, Out to GND, Out to VCC, Out to Out short
Operating supply voltage
: VCC (opr) = 9~18V
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TA8251AHQ pdf
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TA8251AHQ
5. Muting function: Pin(1), pin(25)
By means of controlling pin(25) (mute control terminal) less than about 1.5V, 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 70dB (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 0dB by using of AUX. amplifier.
Therefore, the µcon can directly drive the AUX. amplifier.
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