STA510A 查看數據表（PDF） - STMicroelectronics
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STA510A Datasheet PDF : 17 Pages
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Technical information
4
Technical information
STA510A
The STA510A is a dual channel H-bridge that is able to deliver 100 W per channel (into
RL = 6 Ω with THD = 10% and VCC = 36 V) of audio output power very efficiently. It operates
in conjunction with a pulse-width modulator driver such as the STA321 or STA309A.
The STA510A converts ternary-, phase-shift- or 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 protection circuitry.
In differential mode (ternary, phase-shift or binary differential), 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, both full bridge and half bridge modes are supported. The STA510A
includes overcurrent and thermal protection as well as an undervoltage lockout with
automatic recovery. A thermal warning status is also provided.
Figure 6. Block diagram of full-bridge DDX® or binary mode
INL[1,2]
INR[1,2]
VL
PWRDN
TRISTATE
FAULT
THWARN
Logic
interface
and
decode
Protection
Regulators
Left
H-bridge
Right
H-bridge
OUTPL
OUTNL
OUTPR
OUTNR
Figure 7. Block diagram of binary half-bridge mode
INL[1,2]
INR[1,2]
VL
PWRDN
TRISTATE
FAULT
THWARN
Logic
interface
and
decode
Protection
Regulators
LeftA
½-bridge
LeftB
½-bridge
RightA
½-bridge
RightB
½-bridge
OUTPL
OUTNL
OUTPR
OUTNR
4.1
Logic interface and decode
The STA510A power outputs are controlled using one or two logic-level timing signals. In
order to provide a proper logic interface, the VL input must operate at the same voltage as
the DDX control logic supply.
10/17
Doc ID 11077 Rev 2
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