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Número de pieza | TA8205 | |
Descripción | 18W BTL x 2CH AUDIO POWER AMPLIFIER | |
Fabricantes | Toshiba Semiconductor | |
Logotipo | ||
Hay una vista previa y un enlace de descarga de TA8205 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
No Preview Available ! TA8205AH / AL
TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic
TA8205AH,TA8205AL
18W BTL × 2CH Audio Power Amplifier
The thermal resistance θj−T of TA8205AH, TA8205AL 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.
In addition, the functions of stand−by and muting, and a variety
of protection circuits are involved.
Features
· Low thermal resistance
: θj−T = 1.5°C / W (infinite heat sink)
· High power
: POUT (1) = 18W (typ.) / channel
(VCC = 14.4V, f = 1kHz, THD = 10%, RL = 4Ω)
POUT (2) = 15W (typ.) / channel
(VCC = 13.2V, f = 1kHz, THD = 10%, RL = 4Ω)
Weight
HZIP17−P−2.00 : 9.8g (typ.)
HSIP17−P−2.00 : 9.8g (typ.)
· 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 = 1µA (typ.)
· Built−in muting function (with pin(1) set at low, power is turned off.) : V (mute) = 1V (typ.)
· 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 = 9~18V
1 2002-10-30
1 page TA8205AH / AL
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.4.
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 mute function rapidly discharges 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. External parts list and description
Symbol
Recom-
mended
Value
Feature
C1
4.7µF
DC blocking
C2
47µF
Feedback
condenser
Influence
Smaller Than
Recommended Value
Larger Than
Recommended Value
Related to pop noise at VCC→on.
Related to pop noise at VCC→on.
determination of low cut-off frequency.
C2 =
1
2F・fL・Rf
Remarks
Related to gain.
Refer to item 4.
C3
220µF
Ripple
reduction
Time constant is small
at VCC→on or off.
Time constant is large
at VCC→on or off.
C4
0.12µF
Oscillation
prevention
Made liable to
oscillate.
Oscillation allowance
improved.
Refer to item 3.
C5
1000µF
Repple
filter
For filtering power supply hum and ripple.
Large at using AC rectified power supply.
Small at using DC power supply.
5 2002-10-30
5 Page Package Dimensions
TA8205AH / AL
Weight : 9.8g (typ.)
11 2002-10-30
11 Page |
Páginas | Total 12 Páginas | |
PDF Descargar | [ Datasheet TA8205.PDF ] |
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