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PDF TA8221AHQ Data sheet ( Hoja de datos )
| Número de pieza | TA8221AHQ | |
| Descripción | 30W BTL X 2Ch Audio Power Amplifier | |
| Fabricantes | Toshiba | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de TA8221AHQ (archivo pdf) en la parte inferior de esta página. Total 14 Páginas | ||
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TA8221AHQ / ALQ
TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic
TA8221AHQ,TA8221ALQ
30W BTL × 2Ch Audio Power Amplifier
The thermal resistance θj−T of TA8221AHQ, TA8221ALQ
package designed for low thermal resistance, has a high efficiency
of heat radiation.
The temperature rise of chip can be reduced, and the influence
from the degradation of the features due to the temperature rise
at the high output can also be reduced.
This stereo audio power IC, designed for car audio use, has two
built−in channels to reduce the characteristic difference between
L and R channels.
It also contains various kind of protection.
TA8221AHQ
TA8221ALQ
Features
• Low thermal resistance
: θj−T = 1.5°C / W (infinite heat sink)
• High power
: POUT (1) = 30W (typ.) / channel
(VCC = 14.4V, f = 1kHz, THD = 10%, RL =2Ω)
POUT (2) = 26W (typ.) / channel
(VCC = 13.2V, f = 1kHz, THD = 10%, RL = 2Ω)
POUT (3) = 19W (typ.) / channel
Weight
HZIP17−P−2.00 : 9.8g (typ.)
HSIP17−P−2.00 : 9.8g (typ.)
(VCC = 13.2V, f = 1kHz, THD = 10%, RL = 4Ω)
• Low distortion ratio: THD = 0.04% (typ.) (VCC = 13.2V, f = 1kHz, POUT = 1W, RL = 4Ω, GV = 50dB)
• Low noise: VNO = 0.30mVrms (typ.) (VCC = 13.2V, RL = 4Ω, GV 50dB, Rg = 0Ω, BW = 20Hz~20kHz)
• Built−in stand−by function (with pin(4) set at low, power is turned off.): ISB = 100µA (typ.)
• Built−in muting function (with pin(1) set at low, power is turned off.)
• Built−in various protection circuits
Protection circuits: Thermal shut down, Over voltage, Out→VCC short, Out→GND short and Out−Out short.
• Operating supply voltage: VCC (opr) = 9~18V
1 2004-09-28
Free Datasheet http://www.Datasheet4U.com
1 page  
TA8221AHQ / ALQ
5. Muting function
Through setting pin(1) (mute terminal) at about 1V or less, muting
becomes possible.
The interval circuit of IC is shown in Fig.5.
When pin(1) is set to low, Q1 and Q2 are turned to on, the charge
of the ripple condenser is discharged and the bias is cut. The mute
amount of 60dB or over can be obtained.
Since this muting function rapidly discharge the charge of the ripple
filter capacitor of pin(8), the pop noise is generated by the DC
fluctuation of the bias section.
Therefore, this muting function is not appropriate to the audio muting but it
is effective in muting at VCC→on.
6. Rapid ripple discharging circuit at the time of VCC off
This circuit is effective in such a mode where the VCC and the stand−by terminals become high / low
simultaneously ; for instance, for a pop noise produced when the power is turned on / off repeatedly by operating
the ignition key.
If VCC is off, VCC≒7V is detected internally on IC and
(1) The power stage bias circuit is cut, and
(2) Pin(8) : Ripple capacitor is rapidly discharged by turning Q3 on and then Q1 and Q2 on.
(Precaution 1)
When the stand−by terminal was put to the low level after the ripple rapid
discharging circuit was operated (VCC≒7V) at the time when VCC was turned
off, a pop noise may be generated. Therefore, VCC which makes the stand−by
terminal low shall be set at 8V or above so that (1) the stand−by terminal is
put at the low level and (2) the ripple rapid discharging circuit is turned on
when VCC is turned off (in order of (1) and (2)).
An example of application is shown in (Fig.7).
5 2004-09-28
Free Datasheet http://www.Datasheet4U.com
5 Page 
TA8221AHQ / ALQ
11
2004-09-28
Free Datasheet http://www.Datasheet4U.com
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet TA8221AHQ.PDF ] | |
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