STA515W View Datasheet(PDF) - STMicroelectronics
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STA515W Datasheet PDF : 16 Pages
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STA515W
5
Application information
Application information
The STA515W is a dual channel H-bridge that can deliver 20 W per channel into 8 with
10% THD at VCC = 18 V with high efficiency.
The STA515W converts both DDX 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 DDX 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 STA515W includes overcurrent and thermal protection as well as an undervoltage
lockout with automatic recovery. A thermal warning status is also provided.
Figure 5. Block diagram for DDX or binary modes
INL[1,2]
INR[1,2]
VL
PWRDN
TRISTATE
FAULT
THWARN
Logic
interface
and
decode
Protection
circuit
Left
H-bridge
Right
H-bridge
OUTPL
OUTNL
OUTPR
OUTNR
Regulators
Figure 6. Block diagram for binary half-bridge mode
INL[1,2]
INR[1,2]
VL
PWRDN
TRISTATE
FAULT
THWARN
Logic
interface
and
decode
Protection
circuit
Regulators
Left A
bridge
Left B
bridge
Right A
bridge
Right B
bridge
OUTPL
OUTNL
OUTPR
OUTNR
Logic interface and decode
The STA515W power outputs are controlled using one or two logic-level timing signals. In
order to provide a proper logic interface, pin VL must operate at the same voltage as the
DDX control logic supply.
DocID11079 Rev 3
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