-3-
PT-30DFA
Date:Jan. 2002
Pre-Amplifier
This driver IC integrates signal amplifier and the hysteresis comparator in
this chip. The hysteresis comparator uses the hysteresis characteristic to
eliminate noisy oscillations at output of the comparator.
The driver IC architecture block diagram is shown in Fig. 2.
OSC
FG
Lock Timing
Control
Fan Lock
Detection
BTL linear
Driver
Driver Timing
Control
Vcc
Gnd
O2
O1
NC
Fig. 2. Driver IC Architecture
CMP
OP
Regulator
H-
H+
FG
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