STABP01 Datasheet, PDF (1/7 Pages) STMicroelectronics – BASH DIGITAL PROCESSOR

STABP01
DIGITAL PROCESSOR
s BASH® LICENCE REQUIRED
DESCRIPTION
The STABP01 processor is used to control the
BASH® Digital Converter. When used in conjunction
with BASH® 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
DIP20
SO20
ORDERING NUMBERS:
STABP01 (DIP20)
STABP01D (SO20)
10V
R_t
CLOCK
C_t
COMP
V+
V_FB
CURRENT_SENSE
FA IN
BUFFER IN
BUFFER OUT
VREF
+ ^BUFFER
-
1V
250Hz
1V
ERROR
+ AMP
-
COMP/3
1V
2R
R
FAST ATTACK
+ CONTROL
-
DISCHARGE
(RESET)
TRANSISTOR
17R
R
UVLO: 7V = on
5V = off
-
QR
+
INTERNAL
CIRCUIT
ON
Q
S
-
+
1V
+
-
-
+
CURRENT SENSE
COMPARATOR
+
-
1V
CLK D
QQ
RESET
SQ
RQ
PWM LATCH
10V
SOFT SWITCH
QQ
SR
POWER SUPPLY1
OUTPUT
-+
1V
+
-
1V
GROUND1
SOFT SW RESET
1V
DEAD TIME
POWER_VS2
OUTPUT
GROUND2
+-
ONE SHOT
SIGNAL
CLK Q
10V
DQ
RESET
10V
1V
-+
ONE
OPEN DRAIN _SHOT
OUTPUT _DELAY
1V
REC_OUT
ONE SHOT
DUTY ACCEL
1V
2200pF
1V
R162
10V
2200pF
50K
20K
C51
D00AU1219
December 2002
1/7