STA51813TR ,40V 3.5A QUAD POWER HALF BRIDGEFEATURESFigure 1. Package■ MULTIPOWER BCD TECHNOLOGY■ MINIMUM INPUT OUTPUT PULSE WIDTH DISTORTIONPS ..
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STA518-STA51813TR
40V 3.5A QUAD POWER HALF BRIDGE
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STA518November 2004
FEATURES MULTIPOWER BCD TECHNOLOGY MINIMUM INPUT OUTPUT PULSE WIDTH
DISTORTION 200mΩ RdsON COMPLEMENTARY DMOS
OUTPUT STAGE CMOS COMPATIBLE LOGIC INPUTS THERMAL PROTECTION THERMAL WARNING OUTPUT UNDER VOLTAGE PROTECTION SHORT CIRCUIT PROTECTION
DESCRIPTIONSTA518 is a monolithic quad half bridge stage in Mul-
tipower BCD Technology. The device can be used
also as dual bridge or reconfigured, by connecting
CONFIG pin to Vdd pin, as single bridge with double
current capability.
The device is particularly designed to make the out-
put stage of a stereo All-Digital High Efficiency
(DDX™) amplifier capable to deliver an output power
of 24W x 4 channels @ THD = 10% at Vcc 30V on 4Ω
load in single ended configuration.
It can also deliver 50 + 50W @ THD = 10% at Vcc 29V
as output power on 8Ω load in BTL configuration and
70W @ THD = 10% at Vcc 34V on 8Ω in single paral-
leled BTL configuration. The input pins have thresh-
old proportional to VL pin voltage.
PRODUCT PREVIEW40V 3.5A QUAD POWER HALF BRIDGE
Figure 2. Audio Application Circuit ( Quad single ended)REV. 2
STA518
Table 2. Pin Function
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STA518
Table 3. Functional Pin StatusNote:1. The pin is open collector. To have the high logic value, it needs to be pulled up by a resistor. To put CONFIG = 1 means connect Pin 24 (CONFIG) to Pins 21, 22 (Vdd) to implemented single BTL (MONO MODE) operation
for high current.
Figure 3. Pin Connection
STA518
Table 4. Absolute Maximum Ratings
Table 5. (*) REcommended Operating Conditions(*) performances not guaranteed beyond recommended operating conditions
Table 6. Thermal Data (*)(*) see Thermal information
Table 7. Electrical Characteristcs refer to circuit in Fig.4 (VL = 3.3V; VCC = 30V; RL = 8Ω;fsw = 384KHz; Tamb = 25°C unless otherwise specified)
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STA518
Table 8. Notes:1. The following table explains the VLOW, VHIGH variation with Ibias
Note 2: See relevant Application Note AN1994
Table 9. Logic Truth Table (see fig. 5)
TABLE 7. (continued)
STA518
Figure 4. Test Circuit.
Figure 5.
Figure 6.
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STA518 TECHNICAL INFO: The STA518 is a dual channel H-Bridge that is able to deliver 50W per channel (@ THD=10% RL = 8Ω,
VCC = 29V) of audio output power in high efficiency.
The STA518 converts both DDX and 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 protec-
tion circuitry.
In DDX mode, 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 operation , both Full Bridge and Half Bridge Modes are supported. The STA518 includes over-
current and thermal protection as well as an under-voltage
Lockout with automatic recovery. A thermal warning status is also provided.
Figure 7. STA518 Block Diagram Full-Bridge DDX® or Binary Modes
Figure 8. STA518 Block Diagram Binary Half-Bridge Mode
3.1 Logic Interface and Decode:The STA518 power outputs are controlled using one or two logic level timing signals. In order to provide a proper
logic interface, the Vbias input must operate at the dame voltage as the DDX control logic supply.
3.2 Protection Circuitry:The STA518 includes protection circuitry for over-current and thermal overload conditions. A thermal warning
pin (pin.28) is activated low (open drain MOSFET) when the IC temperature exceeds 130°C, in advance of the
thermal shutdown protection. When a fault condition is detected , an internal fault signal acts to immediately
disable the output power MOSFETs, placing both H-Bridges in high impedance state. At the same time an open-
drain MOSFET connected to the fault pin (pin.27) is switched on.
There are two possible modes subsequent to activating a fault:
