sta530 STMicroelectronics, sta530 Datasheet - Page 11

• Manufacturer Part Number: sta530
• Description: 4 X 50w Stereo Bash Power Amplifier
• Manufacturer: STMicroelectronics

EXTERNAL COMPONENTS
Figure 7. BASH® module SAM261 6.1 with 2 x STA530 (see Application Note AN1643)
Power - On-Off sequences:
In order to avoid damages to the SAM261 board it is important to follow these sequences:
At Power-On apply in the first the Auxiliary Power Supply (±24V) and after the Main Power Supply
(+50V), in this condition the system is in "Mute state" and it can move in "play state" with the switch present
on the pcb.
At Power-Off is better to bring the SAM module in "Mute state" and after that to follow this order: switch-
off the Main Supply Voltage (+50V) and subsequently the Auxiliary Power Supply. (±24V).
C1 = C2 = C3 = C4
R9=R10=R11=R12 Resistor for tracking input voltage filter
C5 = C6 = C7 = C8 Capacitor for Tracking input
C9=C10=C11=C12 Dc decoupling capacitor
R1 = R2 =R7 = R8
R5 = R6 =R3 = R4
C17 = C18
R13 = R14
C13 = C14
C15 = C16
Name
Cac
R17
R18
R19
C19
R15
R16
D1
BASH fi module SAM261
BASH fi module SAM261
Resistor for tracking input voltage
filter
Resistor for tracking input voltage
filter
AC Decoupling capacitor
voltage filter
Bias Resistor for Stby/Mute function
Stby/Mute constant time resistor
Mute resistor
Capacitor for Stby/Mute resistor
Power supply filter capacitor
Centering resistor
Tracking rail power supply filter
TRK_out
Protection
Power supply filter capacitor
Schottky diode
Regulator
Regulator
Controller
Controller
STABP01
STABP01
Buck
Buck
+50VDC
+50VDC
Function
Dynamic Power Supply
Dynamic Power Supply
Lines
Lines
(CD+ & CD - )
(CD+ & CD - )
of
of
Controls
Controls
6.1
6.1
Signal Power Supply
Signal Power Supply
+/ -24V DC / 50
+/ -24V DC / 50
+/ -24V DC / 50
+/ -24V DC / 50
Signal Power Supply
Signal Power Supply
1 x 100Watts
1 x 100Watts
4 x 50Watts
4 x 50Watts
2 x 50Watts
2 x 50Watts
STA530
STA530
STA530
STA530
Rac =100K )
470 F , 63V
(fp = 16Hz,
AudioInputs
AudioInputs
330 , 1W
mA
mA
SB360
100nF
100nF
680nF
Value
10K
56K
10K
10K
30K
30K
2.2 F
40K
1K
1nF
1 F
mA
mA
8 Ohm Loads
8 Ohm Loads
4 Ohm Load
4 Ohm Load
Cac
=
Formula
-------------------------------- -
2
fp Rac
1
STA530
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