SGS Thomson Microelectronics STABP01D, STABP01 Datasheet
■ BASH® LICENCE REQUIRED
DESCRIPTION
The STABP01 processor is used to control the
BASH® Digital Converter. When used in conjunction
with BASH® am plifiers a fully integrated high efficiency power amplifier is realized.
By analyzing the audio input, t he Processor determines 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 processor to constantly adapt to the audio signal and regenerate the digital pulse thereby maintaining a
constant voltage across the output devices.
BLOCK DIAGRAM
INTERNAL
CIRCUIT
ON
+
-
+
CURRENT SENSE
COMPARATOR
+
-
1V
10V
R
t
CLOCK
C
t
COMP
V+
V
CURRENT_SENSE
FA IN
BUFFER IN
BUFFER OUT
VREF
FB
BUFFER
+
-
1V
ERROR
AMP
+
-
FAST ATTACK
CONTROL
+
-
R
COMP/3
250Hz
17R
1V
2R
R
DISCHARGE
(RESET)
TRANSISTOR
1V
Q
Q
UVLO: 7V = on
5V = off
R
S
STABP01
DIGITAL PROCESSOR
SO20DIP20
ORDERING NUMBERS:
STABP01 (DIP20)
STABP01D (SO20)
+
+
PWM LATCH
SQQ
R
1V
CLKQD
RESET
--+
1V
Q
ONE SHOT
SIGNAL
CLKDQ
RESET
SOFT SWITCH
QRQ
S
1V
+
-
Q
-
10V
+
1V
1V
1V10V
OPEN DRAIN
+
OUTPUT
POWER SUPPLY1
OUTPUT
GROUND1
SOFT SW RESET
DEAD TIME
POWER_VS2
OUTPUT
GROUND2
10V
ONE
SHOT
DELAY
December 2002
REC_OUT
1V
2200pF 50K 20K
2200pF
ONE SHOT DUTY ACCEL
1V
C51
R162
10V
D00AU1219
1/7
STABP01
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
Vs Supply Voltage 10.5 V
Io Output Current ±0.6 A
Eo Output Energy(capacitive load) 5 µJ
Vi Analog Input Voltage -0.3 to 8 V
Io Error Amplifier Output Sink Current 10 mA
P
tot
T
stg
T
L
T
op
THERMAL DATA
Symbol Parameter SO20 DIP20 Unit
R
th j-amb
Power Dissipation at Tamb 500 mW
Storage Ambient Temperature -65 to 150 °C
Lead Temperature (soldering 10s) 300 °C
Operating Temperature Range -25 to 85 °C
Thermal Resistance junction-ambient soldered on PCB 95 90 °C/W
PIN CONNECTION
BUFFER OUT
CURRENT SENSE
DEAD TIME
POWER SUPPLY2
MAIN OUTPUT
GROUND2
CLOCK(RT/CT) 10 SOFT SW RESET11
TYPICAL APPLICATION CIRCUIT
V
V+
COMP
1
2
FB
3
4
5
6
7
8
9 GROUND1
D00AU1217B
STABP01
PROCESSOR
19
18
17
16
15
14
13
12
BUFFER IN20
FAST ATTACK
RECTIFIER
DUTY ACCEL
ONE SHOT
ONE SHOT DELAY
POWER SUPPLY1
SOFT SW OUT
REFERENCE SIGNAL
PROTECTION
SIGNAL
2/7
AC
POWER
SUPPLY
BUCK
CONVERTER
D00AU1218
STA575
POWER AMP
AUDIO INPUT
STABP01
ELECTRICAL CHARACTERISTCS
Symbol Parameter Test Conditions Min Typ Max Unit
(Vs = 10V; Rt = 22kΩ; Ct = 2.2nF; t = 25°C unless otherwise specified)
OSCILLATOR SECTION
fs Initial Accuracy (*) Tj=25C, SW Out Off 225 250 300 kHz
Ts Temperature Stability Tmin<Tamb<Tmax 5 %
Amplitude Vpin10 Peak to Peak 0.5 V
ERROR AMP SECTION
Ib I nput Bias Curren t 1 µA
A
VOL
SVR Supply Voltage Rejection 6<Vs<10V 60 70 dB
I
CMR
C
MRR
O
Open loop Gain 65 90 dB
B Unity Gain Bandwidth 0.7 1 MHz
Input Common Mode Range 0 8 V
Common Mode Rejection Ratio 90 dB
Output Voltage Range I = 1mA 0.5 8.5 V
R
CURRENT SENSE SECTION
Gv Gain V4/V5, V5 <1V,
Duty Cycle = 80%
2.7 3 3.3 V/V
V5 Maximum Input Signal V4 = 5V 0.9 1 1.1 V
Ib Input Bias Current V5 <0.9V, 1 µA
Odt Delay to Output (minimum output
pulse)
150 300 ns
OUTPUT SECTION
V
V
Output Low Level Isink=20mA
OL
Output High Level Isource=20mA
OH
tr Rise Time Tj=25°C CL=1nF 50 150 ns
tf Fall Time Tj=25°C CL=1nF 50 150 ns
Isink=200mA
Isource=200mA
9.6
7.8
0.1
1.5
9.9
8.5
0.4
2.2
UNDER-VOLTAGE LOCKOUT SECTION
UVstart Start Threshold 6.3 7 7.7 V
UVstop Min Operating Voltage
After Turn-on
4.5 5 5.5 V
TOTAL STANDBY CURRENT
Ist Start-up Current 0.5 1 mA
Is Operating Supply Current 10 20 mA
V
V
V
V
3/7
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