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TA8227P Datasheet

LOW FREQUENCY POWER AMPLIFIER

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TA8227P pdf
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UTCTA8227P LINEAR INTEGRATED CIRCUIT
LOW FREQUENCY POWER
AMPLIFIER
DESCRIPTION
The UTC TA8227P is an audio power IC with built-in two
channels developed for portable radio cassette tape recorder
with power ON / OFF switch.
Because of the parts reduction and DIP, space merit is
remarkable.
Thermal shut down protection circuit is built in.
FEATURES
*Wide operating supply voltage: Vcc=5~12V
*Low popping noise at power ON
*Best for supply voltage 9V
*Output power
Po=2.5W/CH at Vcc=9V, RL=4, f=1kHz, THD=10%
Po=3.0W/CH at Vcc=9V, RL=3, f=1kHz, THD=10%
*Soft Clip
*Built-in Thermal shut-down protection circuit
*Stand-by Switch
DIP-12H
BLOCK DIAGRAM
UTC
UNISONIC TECHNOLOGIES CO., LTD. 1
QW-R107-011,B



UTC
UTC

TA8227P Datasheet Preview

TA8227P Datasheet

LOW FREQUENCY POWER AMPLIFIER

No Preview Available !

TA8227P pdf
UTCTA8227P LINEAR INTEGRATED CIRCUIT
APPLICATION INFORMATION AND APPLICATION METHOD
1. Adjustment of voltage gain
The voltage gain Gv is obtained as follows by R1, R2 and Rf in Fig.1
When Rf=0
Gv=56.5 dB (Typ.)
When Rf=120
Gv=45 dB (Typ.)
By increasing Rf, reduction of Gv is possible. However, since the feedback increase is liable to produce
oscillation, it is recommended to use this at 40dB or over.
2. Thermal shut-down circuit
The thermal shut-down circuit is built in for the purpose of preventing the destruction of IC due to the abnormal
temperature rise when the heat radiation is insufficient.
The operation temperature is set at radiation Fin temperature 175°C (Typ.)
At this temperature or over the bias is interrupted to prevent the destruction of IC.
3. Input stage
The input circuit of this IC is as shown in fig.2. PNP Tr : Q1 is provided in the input circuit so as to make its usage
possible without the input coupling capacitor.
However, at pin 6 and pin 7, max 60mV offset voltage is produced.
Application after checking volume slide noise is recommended.
For cutting the volume slide noise, insert the input capacitor: CIN in series to interrupt the DC component.
UTC
UNISONIC TECHNOLOGIES CO., LTD. 2
QW-R107-011,B


Part Number TA8227P
Description LOW FREQUENCY POWER AMPLIFIER
Maker UTC
Total Page 9 Pages
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