STA506 STMicroelectronics, STA506 Datasheet - Page 7

• Manufacturer Part Number: STA506
• Description: Audio Amplifiers 40V 4.0A Half Bridge
• Manufacturer: STMicroelectronics

Specifications of STA506

• Product: Class-AB
• Output Power: 80 W
• Operating Supply Voltage: 12 V, 15 V, 18 V
• Supply Current: 50 mA
• Maximum Power Dissipation: 50000 mW
• Maximum Operating Temperature: + 70 C
• Audio Load Resistance: 8 Ohms
• Input Signal Type: Single
• Minimum Operating Temperature: 0 C
• Output Signal Type: Differential
• Supply Type: Single
• Supply Voltage (max): 36 V
• Supply Voltage (min): 10 V
• Output Type: 1-Channel Mono or 2-Channel Stereo
• Package / Case: PowerSO-38 Slug Up
• No. Of Channels: 4
• Supply Voltage Range: 10V To 36V
• Load Impedance: 8ohm
• Operating Temperature Range: -40°C To +90°C
• Amplifier Case Style: PowerSO
• No. Of Pins: 36
• Svhc: No SVHC
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

3
The STA506 is a dual channel H-Bridge that is able to deliver more than 60W per channel (@ THD=10%) of
audio output power in high efficiency.
The STA506 converts both DDX and binary-controlled PWM signals into audio power at the load. It includes a
logic interface , integrated bridge drivers, high efficiency MOSFET outputs and thermal and short circuit protec-
tion circuitry.
In DDX mode, two logic level signals per channel are used to control high-speed MOSFET switches to connect
the speaker load to the input supply or to ground in a Bridge configuration, according to the damped ternary
Modulation operation.
In Binary Mode operation , both Full Bridge and Half Bridge Modes are supported. The STA506 includes over-
current and thermal protection as well as an under-voltage
Lockout with automatic recovery. A thermal warning status is also provided.
Figure 7. STA506 Block Diagram Full-Bridge DDX
Figure 8. STA506 Block Diagram Binary Half-Bridge Mode
3.1 Logic Interface and Decode:
The STA506 power outputs are controlled using one or two logic level timing signals. In order to provide a proper
logic interface, the Vbias input must operate at the dame voltage as the DDX control logic supply.
3.2 Protection Circuitry:
The STA506 includes protection circuitry for over-current and thermal overload conditions. A thermal warning
pin (pin.28) is activated low (open drain MOSFET) when the IC temperature exceeds 130C, in advance of the
thermal shutdown protection. When a fault condition is detected , an internal fault signal acts to immediately
disable the output power MOSFETs, placing both H-Bridges in high impedance state. At the same time an open-
drain MOSFET connected to the fault pin (pin.27) is switched on.
There are two possible modes subsequent to activating a fault:
TECHNICAL INFO:
TRI-STATE
TRI-STATE
TWARN
FAULT
TWARN
INR[1:2]
PWRDN
INL[1:2]
PWRDN
INR[1:2]
INL[1:2]
FAULT
VL
VL
and Decode
and Decode
Regulators
Protection
Regulators
Protection
Logic I/F
Circuitry
Logic I/F
Circuitry
®
H-Bridge
H-Bridge
‰-Bridge
‰ -Bridge
‰ -Bridge
‰ -Bridge
or Binary Modes
RightA
RightB
Left
Right
LeftA
LeftB
OUTPL
OUTNL
OUTPR
OUTNR
OUTPL
OUTNL
OUTPR
OUTNR
STA506
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