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PDF BA6897FP Data sheet ( Hoja de datos )
| Número de pieza | BA6897FP | |
| Descripción | 4-channel BTL driver for CD players | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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Optical disc ICs
4-channel BTL driver for CD players
BA6897S / BA6897FP
The BA6897S and BA6897FP are a 4-channel BTL driver for CD player motors and actuators. It has an internal 5V
regulator and standard operational amplifier, and is suited to a wide range of applications.
FApplications
CD players, CD-ROM drives
FFeatures
1) Minimal number of external components.
2) Driver gain is adjustable with just one attached resis-
tor.
3) Internal 5V regulator (attached PNP transistor nec-
essary).
4) Internal standard operational amplifier.
5) Internal thermal shutdown circuit.
FAbsolute maximum ratings (Ta = 25_C)
FRecommended operating conditions (Ta = 25_C)
391
1 page  
Optical disc ICs
FInput / output circuits
BA6897S / BA6897FP
395
5 Page 
Optical disc ICs
FOperation notes
(1) The BA6897S and BA6897FP have an internal
thermal shutdown circuit. Output current is muted when
the chip temperature exceeds 175_C (typically).
(2) If the mute pin voltage is opened or lowered below
0.5V, the output current will be muted. The mute pin
should be pulled up above 2.0V during normal use.
(3) The bias pin is muted when lowered below 1.4V
(typically). Make sure it stays above 1.6V during normal
use.
(4) Muting occurs during thermal shutdown, mute-on
operations or a drop in the bias pin voltage or supply volt-
BA6897S / BA6897FP
age. In each case, only the drivers are muted. During
muting, the output pins remain at the internal bias volt-
age, roughly (VCC–VF) / 2.
(5) Be sure to connect the IC to a 0.1µF bypass capaci-
tor to the power supply, at the base of the IC.
(6) The radiating fin is connected to the packages inter-
nal GND, but should also be connected to an external
ground.
(7) The capacitor between regulator output (pin 6) and
GND also serves to prevent oscillation of the IC, so select
one with good temperature characteristics.
FElectrical characteristic curves
401
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet BA6897FP.PDF ] | |
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