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STA515W bảng dữ liệu(PDF) 8 Page - STMicroelectronics

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Applications information
STA515W
8/14
Doc ID 11079 Rev 2
4
Applications information
The STA515W is a dual channel H-bridge that can deliver 20 W per channel into 8
Ω 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
Figure 6.
Block diagram for binary half-bridge mode
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.
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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