CMD6392
4-Channel BTL Driver for Players
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 constan 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 :
I1 R
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 :
R C = 2.4µsec
* All specs and applications shown above subject to change without prior notice.
1F-5 NO.66 SEC.2 NAN-KAN RD ., LUCHU , TAOYUAN, TAIWAN
Tel:886-3-3214525
Email: server@ceramate.com.tw
Http: www.ceramate.com.tw
Rev 1.2 Oct.24, 2002
Page 5 of 8
Fax:886-3-3521052
CERAMATE [ CERAMATE TECHNICAL ]
