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STA506A 数据表(PDF) 7 Page - STMicroelectronics

部件名 STA506A
功能描述  45V 4A QUAD POWER HALF BRIDGE
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

STA506A 数据表(HTML) 7 Page - STMicroelectronics

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STA506A
3
TECHNICAL INFO:
The STA506A 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 STA506A 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 pro-
tection 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 STA506A includes over-
current and thermal protection as well as an under-voltage
Lockout with automatic recovery if FAULT and TRISTATE pins are connected together to an external capacitor,
as in fig.9
Figure 7. STA506A Block Diagram Full-Bridge DDX® or Binary Modes
Figure 8. STA506A Block Diagram Binary Half-Bridge Mode
3.1 Logic Interface and Decode:
The STA506A power outputs are controlled using one or two logic level timing signals. In order to provide a prop-
er logic interface, the VL input must operate at the dame voltage as the DDX control logic supply.
3.2 Protection Circuitry:
The STA506A 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 130°C, 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.
Logic I/F
and Decode
Left
H-Bridge
Protection
Circuitry
IN1A/B
IN2A/B
PWRDN
OUT1A
FAULT
VL
TRI-STATE
OUT1B
OUT2A
OUT2B
TWARN
Regulators
Right
H-Bridge
Logic I/F
and Decode
LeftA
‰-Bridge
Protection
Circuitry
IN1A/B
IN2A/B
PWRDN
OUT1A
FAULT
VL
TRI-STATE
OUT2A
OUT1B
OUT2B
TWARN
Regulators
RightA
‰-Bridge
LeftB
‰-Bridge
RightB
‰-Bridge


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