STABP01
DIGITAL PROCESSOR
s
BASH廬 LICENCE REQUIRED
DESCRIPTION
The STABP01 processor is used to control the
BASH廬 Digital Converter. When used in conjunction
with BASH廬 amplifiers a fully integrated high efficien-
cy power amplifier is realized.
By analyzing the audio input, the Processor deter-
mines the appropriate on/off events and generates a
digital pulse for the Digital Converter. The converter
turns this pulse into a power signal that feeds the
power amplifier. The feedback system allows the pro-
cessor to constantly adapt to the audio signal and re-
generate the digital pulse thereby maintaining a
constant voltage across the output devices.
BLOCK DIAGRAM
UVLO: 7V = on
5V = off
-
R
+
-
+
SOFT SWITCH
250Hz
1V
CLOCK
C
t
COMP
+
V+
V
FB
ERROR
AMP
1V
+
-
GROUND1
SOFT SW RESET
1V
DEAD TIME
POWER_VS2
+
+
-
S R
OUTPUT
Q Q
1V
10V
DIP20
SO20
ORDERING NUMBERS:
STABP01 (DIP20)
STABP01D (SO20)
Q
VREF
10V
R
t
1V
INTERNAL
CIRCUIT
ON
Q
S
POWER SUPPLY1
R
CURRENT SENSE
COMPARATOR
+
CURRENT_SENSE
DISCHARGE
(RESET)
TRANSISTOR
1V
S Q
R Q
PWM LATCH
BUFFER OUT
1V
REC_OUT
1V
2200pF
50K
2200pF
ONE SHOT
1V
20K
C51
December 2002
-
+
R
RESET
DUTY ACCEL
R162
10V
+
-
+
BUFFER IN
BUFFER
+
FA IN
FAST ATTACK
CONTROL
ONE SHOT
SIGNAL
CLK
10V
D
Q
Q
1V
OPEN DRAIN
OUTPUT
ONE
SHOT
DELAY
17R
-
+
COMP/3
-
-
-
-
2R
CLK
Q
D
Q
RESET
-
1V
1V
OUTPUT
GROUND2
10V
D00AU1219
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