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TPA3118D2DAPR Datasheet(PDF) 18 Page - Texas Instruments

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Part # TPA3118D2DAPR
Description  15W,30W,50W Filter-Free Class-D Stereo Amplifier Family with AM Avoidance
Download  34 Pages
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TPA3118D2DAPR Datasheet(HTML) 18 Page - Texas Instruments

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TPA3116D2
4.5 V–26 V
PSU
LC Filter
OUTPR
OUTNR
OUTPL
OUTNL
Right
Left
PBTL
Detect
TPA3116D2
TPA3118D2
TPA3130D2
SLOS708B – APRIL 2012 – REVISED MAY 2012
www.ti.com
MONO MODE (PBTL)
The TPA31xxD2 family can be connected in MONO mode enabling up to 100W output power. This is done by:
Connect INPL and INNL directly to Ground (without capacitors) this sets the device in Mono mode during
power up.
Connect OUTPR and OUTNR together for the positive speaker terminal and OUTNL and OUTPL together for
the negative terminal
Analog input signal is applied to INPR and INNR
DEVICE PROTECTION SYSTEM
The TPA31xxD2 family contains a complete set of protection circuits carefully designed to make system design
efficient as well as to protect the device against any kind of permanent failures due to short circuits, overload,
over temperature, and under-voltage. The FAULTZ pin will signal if an error is detected according to the fault
table below:
Table 4. Fault Reporting
TRIGGERING CONDITION
LATCHED/SELF-
FAULT
FAULTZ
ACTION
(typical value)
CLEARING
Over Current
Output short or short to PVCC or GND
Low
Output high impedance
Latched
Over Temperature
Tj > 150°C
Low
Output high impedance
Latched
Too High DC Offset
DC output voltage
Low
Output high impedance
Latched
Under Voltage on
PVCC < 4.5V
Output high impedance
Self-clearing
PVCC
Over Voltage on
PVCC > 27V
Output high impedance
Self-clearing
PVCC
DC DETECT PROTECTION
The TPA31xxD2 family has circuitry which will protect the speakers from DC current which might occur due to
defective capacitors on the input or shorts on the printed circuit board at the inputs. A DC detect fault will be
reported on the FAULT pin as a low state. The DC Detect fault will also cause the amplifier to shutdown by
changing the state of the outputs to Hi-Z.
If automatic recovery from the short circuit protection latch is desired, connect the FAULTZ pin directly to the
SDZ pin. This allows the FAULTZ pin function to automatically drive the SDZ pin low which clears the DC Detect
protection latch.
A DC Detect Fault is issued when the output differential duty-cycle of either channel exceeds 60% for more than
420 msec at the same polarity. Table x below shows some examples of the typical DC Detect Protection
threshold for several values of the supply voltage. This feature protects the speaker from large DC currents or
AC currents less than 2Hz. To avoid nuisance faults due to the DC detect circuit, hold the SD pin low at power-
up until the signals at the inputs are stable. Also, take care to match the impedance seen at the positive and
negative inputs to avoid nuisance DC detect faults.
The minimum output offset voltages required to trigger the DC detect are show in Table 5. The outputs must
remain at or above the voltage listed in the table for more than 420 msec to trigger the DC detect.
18
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Copyright © 2012, Texas Instruments Incorporated
Product Folder Link(s): TPA3116D2 TPA3118D2 TPA3130D2


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