BA6392FP datasheet(5/8 Pages) ROHM

No de pièce	BA6392FP

Description	4-channel BTL driver for CD players

PDF	8 Pages

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Fabricant	ROHM [Rohm]

Site Internet	http://www.rohm.com

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5 / 8 page

328

Optical disc ICs

BA6392FP

FInput / output circuits

FCircuit operation

(1)

Fig. 3 shows the inputs from the digital servo IC for

CH1-CH3 drivers (all drivers except the spindle).

SW1 is on when the forward input signal (HIGH level,

over 2.4V) is present. SW2 is on when the reverse input

signal is present (Fig. 2)

The constant current (I1) at this time enters the RC and

generates an integral waveform based on the duty of the

input waveform. The BTL is output from BUF1 and BUF2

(Fig. 4).

To maintain the HIGH level with forward (or reverse) in-

put, the DC voltage generated at point A is :

2.5V (reverse :

*2.5V)

This is the voltage generated relative VREF. The setting is

such that a voltage differential of 5V is generated be-

tween output pins. The time constant is :

C = 2.4

µsec

BA6392FP Fiches technique(PDF) 5 Page - Rohm