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STA506A 数据表(PDF) 7 Page - STMicroelectronics |
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STA506A 数据表(HTML) 7 Page - STMicroelectronics |
7 / 14 page 7/14 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 |
类似零件编号 - STA506A_04 |
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类似说明 - STA506A_04 |
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