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PDF BA5152F Data sheet ( Hoja de datos )
| Número de pieza | BA5152F | |
| Descripción | 1.5V / 15mW dual power amplifier | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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Audio ICs
1.5V / 15mW dual power amplifier
BA5152F
The BA5152F is a dual-channel power amplifier designed for 1.5V headphone stereos. The circuit consists of a power
supply circuit, mute circuit, bias circuit, and two amplifier circuits. To simplify assembly, the gain is fixed, so external nega-
tive-feedback components are not required.
FApplications
1.5V headphone Hi-Fi stereos
FFeatures
1) High output. POUT = 15mW (RL = 16Ω).
2) Small “pop” noise.
3) Mute circuit terminal provided.
4) Terminals provided for radiation countermeasures.
5) Good ripple rejection ratio.
6) Few external components required.
7) Good low-voltage characteristics.
8) Built-in power switch circuit.
FBlock diagram
FAbsolute maximum ratings (Ta = 25_C)
367
1 page  
Audio ICs
BA5152F
(3) Bias block
The components connected to pins 2, 3, and 4 set the
bias point and VODC. When pin 2 is open circuit, and VCC
= 1.25V, the output pin VODC voltage is internally set to
1 / 2VCC. By connecting a resistor to pin 2 and changing
the voltage divider ratio, it is possible to vary VODC.
Pins 3 and 4 are shorted and connected to earth via an
electrolytic capacitor to generate the bias point. When a
33µF component is used, it is possible to obtain 45dB of
ripple rejection. This can be improved if pins are indepen-
dently grounded through capacitors.
(4) Amplifier block
The amplifier circuits have a fixed gain of GV = 21dB. The
negative-feedback circuits are on the chip, and the
ground point of the negative-feedback circuit uses the
bias point as its reference, so connect the input poten-
tiometer to the bias point pins (3 and 4). Connect bypass
capacitors to the output pin to prevent oscillation. When
the IC is used in sets containing an AM radio, it is possible
to reduce unnecessary radiation from the power amplifi-
ers by connecting CR circuits to pins 6 and 11.
FElectrical characteristics curves (Ta = 25_C)
371
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet BA5152F.PDF ] | |
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