Datasheet

DocID13183 Rev 5 11/18
STA516B Technical information
18
5 Technical information
The STA516B is a dual channel H-bridge that is able to deliver 200 W per channel (into
R
L
=6 with THD = 10% and V
CC
= 51 V) of audio output power very efficiently. It operates
in conjunction with a pulse-width modulator driver such as the STA321 or STA309A.
The STA516B 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 STA516B
includes overcurrent and thermal protection as well as an undervoltage lockout with
automatic recovery. A thermal warning status is also provided.
Figure 7. Block diagram of full-bridge DDX
®
or binary mode
Figure 8. Block diagram of binary half-bridge mode
5.1 Logic interface and decode
The STA516B power outputs are controlled using one or two logic-level timing signals. In
order to provide a proper logic interface, the V
L
input must operate at the same voltage as
the DDX control logic supply.
INL[1,2]
INR[1,2]
VL
PWRDN
TRISTATE
FAULT
THWARN
OUTPL
OUTNL
OUTPR
OUTNR
Left
H-bridge
Logic
interface
and
decode
Protection
Regulators
Right
H-bridge
Logic
interface
and
decode
Protection
Regulators
INA(1,2)
INB(1,2)
VL
PWRDN
TRISTATE
FAULT
THWARN
Left A
1/2-Bridge
OUT 1A
Left A
1/2-Bridge
Left A
1/2-Bridge
OUT 2A
Left A
1/2-Bridge
OUT 2B
OUT 1B