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PDF BA6394FP Data sheet ( Hoja de datos )
| Número de pieza | BA6394FP | |
| Descripción | 4-Channel BTL Driver | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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Optical disc ICs
4-channel BTL driver for CD players
BA6394FP
The BA6394FP is a 4-channel H-bridge BTL driver for CD players. The internal standard operational amplifier and
28-pin HSOP package make this IC suited to compact applications, while the 3V power supply is ideal for portable
devices.
•Applications
CD players and CD-ROM drives
•Features
1) 4-channel BTL driver.
2) HSOP 28-pin package for compact applications.
3) Wide dynamic range.
• B l o c k diagram
4) Internal thermal shutdown circuit.
5) Gain is adjustable with a single attached resistor.
6) Internal standard operational adjuster.
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1 page  
Optical disc ICs
2. Operational amplifier
A standard 4558 type.
>Application example
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BA6394FP
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Fig-3
•Operation notes
1. The BA6394FP has an internal thermal shutdown
circuit. Output current is muted when the chip tem-
perature exceeds 175°C (typically).
2. If the mute pin (19 pin) voltage is o p e n e d or low-
ered below 0.5V, the output current will be muted.
3. The bias pin (10 pin) is muted when lowered below
1,0V (typically). Make sure it stays above 1.2V dur-
ing normal use.
4. Muting occurs during thermal shutdown, mute-on
operations or a drop in the bias pin voltage or sup-
ply voltage. In each case, only the drivers are
muted.
Dead zone width is determined as follows :
Dead zone width=input resistance (attached resis-
tor+internal input resistor 1 k Q ) x l . 0 / x A ' ' « • (D
When u s i n g the internal resistor (1 Ok Q ) , d e a d
zone width is 10mV (typically one side). Because
the input resistance and 1 fx A temperature charac-
teristics are canceled out, there is virtually no varia-
tion due to temperature as long as the internal in-
put resistor is used. However, a dead zone like that
defined by the above equation occurs when an ex-
ternal resistor is used to change gain. Temperature
change is typically 4000ppm per degree.
Be sure to connect the IC to a 0.1 jj. F bypass ca-
pacitor to the power supply, at the base of the IC.
Because of the gain adjustment pin's high gain,
connecting a long wire to it may result in output os-
cillation due to free capacitance. Use caution when
designing wires.
Be sure to leave the test pins (23, 24 pin) open and
unconnected.
noHm
437
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet BA6394FP.PDF ] | |
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