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PDF TA8225H Data sheet ( Hoja de datos )
| Número de pieza | TA8225H | |
| Descripción | 45W BTL AUDIO AMPLIFIER | |
| Fabricantes | Toshiba Semiconductor | |
| Logotipo |  |
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TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic
TA8225H,TA8225L
TA8225H/L
45W BTL Audio Amplifier
The TA8225H, TA8225L is BTL audio power amplifier for
consumer application.
It is designed for high power, low distortion and low noise.
It contains various kind of protectors and the function of
stand−by SW.
In addition, the functions of output short or over voltage
detection and junction temperature are involved.
Features
· High power
: POUT (1) = 45W (typ.)
(VCC = 14.4V, f = 1kHz, THD = 10%, RL = 2Ω)
: POUT (2) = 40W (typ.)
(VCC = 13.2V, f = 1kHz, THD = 10%, RL = 2Ω)
: POUT (3) = 24W (typ.)
(VCC = 13.2V, f = 1kHz, THD = 10%, RL = 4Ω)
· Low thermal resistance
: θj−c = 1.5°C / W (infinite heat sink)
· Excellent output power band width
: POUT (4) = 18W (typ.)
(VCC = 13.2V, f = 50Hz~20kHz, THD = 1%, RL = 4Ω)
Weight
HZIP17−P−2.00: 9.8g (typ.)
HSIP17−P−2.00: 9.8g (typ.)
· Low distortion ratio
: THD = 0.015% (typ.)
(VCC = 13.2V, f = 1kHz, POUT = 4W, RL = 4Ω)
· Built−in stand−by function (with pin(1) set at high, power is turned on)
· Built−in output short or over voltage detection circuit, output to VCC and output to GND short.
(Pin(8): Open collector)
· Built−in junction temperature detection circuit. (Pin(2): Open collector)
· Built−in various protection circuits
· Thermal shut down, Over voltage
· Output to GND short
· Output to VCC short
· Output to Output short
· Operating supply voltage: VCC (opr) = 9~18V
1 2002-10-30
1 page  
TA8225H/L
(2) Input offset voltage
Input offset voltage is increased by as many times as a gain and appears as output offset voltage.
Input offset voltage is affected by an external resistor in addition to properness of pair of capacitor in IC.
An example of a general application circuit is shown in (Fig.5). In this case, input to the differential amplifier
composing the buffer amplifier is decided to be 30kΩ + 1.1kΩ = 31.1kΩ at the in (+) side and 1.1k at the in (-)
side. Therefore a rising difference of about 30 times between the in (+) side and the in (-) side.
So, to fit input offset voltages, it is possible to suppress the input offset voltage by adjusting it to 31.1kΩ both
at the in (+) and in (-) sides according to the application example shown in (Fig.6). As input coupling
capacitors are used in actual set, the circuit shown in (Fig.7) is considered. In this case, it is necessary to
take the utmost care of proper pair of CIN (+) and CIN (-).
Pop noise level affected by input offset voltage shall be checked on an actually mounted set.
4. Junction temperature detecting pin(2)
Using temperature characteristic of a band gap circuit and in proportion to junction temperature, pin(2) DC
voltage: V2 rises at about ±10mV / °C temperature characteristic. So, the relation between V2 at Tj = 25°C and
V2χ at Tj =χ°C is decided by the following expression:
Tj
(c°C) =
V2c - V2 (25°C)
10mV / °C
+ 25(°C)
In deciding a heat sink suze, a junction temperature can be
easily made clear by measuring voltage at this pin while a
backside temperature of IC was so far measured using a
thermocouple type thermometer.
5 2002-10-30
5 Page 
TA8225H/L
11 2002-10-30
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet TA8225H.PDF ] | |
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