參數(shù)資料
型號(hào)： TAS5414TDKDRQ1G4
廠商： TEXAS INSTRUMENTS INC
元件分類(lèi)： 音頻／視頻放大
英文描述： 116 W, 4 CHANNEL, AUDIO AMPLIFIER, PDSO36
封裝： GREEN, PLASTIC, HSSOP-36
文件頁(yè)數(shù)： 11/43頁(yè)
文件大小： 978K
代理商： TAS5414TDKDRQ1G4
www.ti.com
50V
100ms
Max
MaxRampRate
25V/ms
PVDD
50V
29V
26V
23V
22V
14.4V
Hi-Z AllCh’s
I CStop
StandbyMode
2
LoadDumpProtection
29V–50V
OvervoltageProtectionRegion
23V–29V
NormalOperatingRegion
8V–22V
Time
POR
I CStart
2
ReadytoGet
OffHi-ZState
T0189-01
Power Supply
I
2C Serial Communication Bus
SLOS514A – FEBRUARY 2007 – REVISED JULY 2007
DESCRIPTION OF OPERATION (continued)
Figure 15. Voltage Operating Regions With Load Dump Transition Defined
The power for the device is most commonly provided by a car battery that can have a large voltage swing, 8 Vdc
to 18 Vdc. PVDD is a filtered battery voltage, and it is the supply for the output FETS and the low-side FET gate
driver. The high-side FET gate driver is supplied by a charge pump (CP) supply. The charge pump supplies the
gate drive voltage for all four channels. The analog circuitry is powered by AVDD, which is a provided by an
internal linear regulator. A 0.1
μF/10V external bypass capacitor is needed at the A_BYP pin for this supply. It is
recommended that no external components except the bypass capacitor be attached to this pin. The digital
circuitry is powered by DVDD, which is provided by an internal linear regulator. A 0.1
μF/10V external bypass
capacitor is needed at the D_BYP pin. It is recommended that no external components except the bypass
capacitor be attached to this pin.
The TAS5414 and TAS5424 can withstand fortuitous open ground and power conditions. Fortuitous open
ground usually occurs when a speaker wire is shorted to ground, allowing for a second ground path through the
body diode in the output FETs. The uniqueness of the diagnostic capabilities allows the speakers and speaker
wires to be debugged, eliminating the need to remove the amplifier to diagnose the problem.
The TAS5414 and TAS5424 communicate with the system processor via the I2C serial communication bus. The
TAS5414 and TAS5424 are I2C slave-only devices. The processor can poll the TAS5414 and the TAS5424 via
I2C to determine the operating status of the device. All fault conditions and detections are reported via I2C.
There are also numerous features and operating conditions that can be set via I2C.
The I2C bus allows control of the following configurations:
Independent gain control of each channel. The gain can be set to 12 dB, 20 dB, 26 dB, and 32 dB.
19
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