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STA533WF Datasheet(PDF) 7 Page - STMicroelectronics |
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STA533WF Datasheet(HTML) 7 Page - STMicroelectronics |
7 / 15 page STA533WF Applications information Doc ID 17658 Rev 2 7/15 3 Applications information The STA533WF is a dual-channel H-bridge audio power amplifier that can deliver 20 W per channel into 8 Ω with 10% THD at VCC = 18 V with high efficiency. The STA533WF converts both FFX and binary-logic-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 protection circuitry. In FFX mode, two logic-level signals per channel are used to control the high-speed MOSFET switches which drive the speaker load in a bridge configuration, according to the damped ternary modulation operation. In binary mode, both full-bridge and half-bridge modes are supported. The STA533WF includes overcurrent and thermal protection as well as an undervoltage lockout with automatic recovery. A thermal warning status is also provided. Figure 4. Block diagram for FFX or binary modes Figure 5. Block diagram for binary half-bridge mode Logic interface and decode The STA533WF power outputs are controlled using one or two logic-level timing signals. In order to provide a proper logic interface, pin VL must have the same voltage as the PWM input signal. Logic interface and decode OUTPL OUTNL Left H-bridge Protection circuit Regulators OUTPR OUTNR Right H-bridge INL[1,2] VL PWRDN TRISTATE FAULT THWARN INR[1,2] OUTPL Left A bridge Logic interface and decode Protection circuit Regulators INL[1,2] VL PWRDN TRISTATE FAULT THWARN INR[1,2] OUTNL Left B bridge OUTPR Right A bridge OUTNR Right B bridge |
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Similar Description - STA533WF_11 |
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