BA6898FP データシートの表示（PDF） - ROHM Semiconductor

部品番号

コンポーネント説明

一致するリスト

BA6898FP

4-channel BTL driver for CD players

ROHM Semiconductor 

Optical disc ICs

FOperation notes (pin Nos. are those for the BA6898S)

(1) Relationship between mute and reset output

BA6898S / BA6898FP

Regulator voltage drop . . . . . If the regulator voltage drops to 4.0V (Typ.) or below, the reset output turns low and the

mute turns on. If the voltage then rises again to 4.2V (Typ.), the reset output turns high

and the mute turns off.

Bias voltage drop . . . . . . . . . . If the bias pin (pin 3) voltage lowers to 1.4V (Typ.) or below, the mute turns on and the

reset output turns low. For normal operations, have the voltage at 1.6V or greater.

Thermal shutdown . . . . . . . . . When the chip temperature reaches 175_C (Typ.), the mute turns on and the reset output

turns low. If the chip temperature then drops below 150_C (Typ.), then the mute turns off

and the reset output turns high.

Mute (pin 15) . . . . . . . . . . . . . If the mute pin (pin 15) voltage is open or lowers to 0.5V or below, the mute turns on but

the reset output does not change.

(2) If the voltage of the thermal shutdown, mute ON, or

bias pin drops, or if the regulator voltage drops, the mute

is activated; however, in these situations, only the drivers

are muted. Also, the output pin voltage becomes the in-

ternal bias voltage (approx. (VCC*VF) / 2).

(3) Connect a bypass capacitor (approx. 0.1µF) be-

tween the bases of the power supply pins of this IC.

(4) Even though pins 16 and 32 are connected to

ground within the package, be sure to also connect them

to a ground externally as well.

FElectrical characteristic curves

(5) The capacitor connected between the regulator

output pin (pin 14) and GND also serves to prevent os-

cillation, so be sure to use a capacitor with excellent ther-

mal characteristics.

(6) If the regulator is not used, short the regulator out-

put pin (pin 14) to VCC and have the pin for the externally

connected transistor base (pin 13) open.

(7) Of the ground pins, only pin 18 is not connected to

the IC substrate. Therefore, design the PC board pattern

so that the potential of GND pin 18 does not go below the

substrate GND (including transient conditions).

680

Share Link: