參數(shù)資料
型號(hào)： TAS5086DBT
廠商： TEXAS INSTRUMENTS INC
元件分類： 消費(fèi)家電
英文描述： SPECIALTY CONSUMER CIRCUIT, PDSO38
封裝： GREEN, TSSOP-38
文件頁(yè)數(shù)： 6/47頁(yè)
文件大小： 814K
代理商： TAS5086DBT
PSU
VPP
GND
IN
PWM
TAS5086
OUT
S0270-01
PowerStage
SLES131C – FEBRUARY 2005 – REVISED JUNE 2008 ................................................................................................................................................... www.ti.com
Figure 9. SE Filter Configuration
The TAS5086 supports two mechanisms for controlling the split-capacitor midpoint.
In the extra half-bridge scheme (the TAS5186 power stage is an example of this) an additional half-bridge is
started and brought to a 50-percent duty cycle, i.e., a situation where the average voltage of the half-bridge is
equal to the voltage which must be applied to the split-capacitor midpoint to start up without clicks in the speaker.
A resistor per channel is connected between the extra half-bridge and each midpoint for the split capacitors. The
split capacitors are charged through this resistor. This approach requires an extra VALID pin on the modulator to
control the extra half-bridge, therefore the 1N+2 interface. Figure 10 shows the topology of the extra half-bridge.
In some situations, a channel configured in BTL can be used to charge the split capacitor instead of the extra
half-bridge. This is shown in Figure 11.
The mid-Z scheme charges the split capacitor through the loudspeaker. In order to do this without audible
artifacts the charge current must be limited. This is done by applying a start sequence which charges the output
state between low, high and high-Z. Because the ouput stage is in high-Z in a part of the sequence, the resulting
output impedance can be brought to a level suitable for charging the split capacitors without audible artifacts.
This solution does not require external components, as shown in Figure 9. Not all power stages are compatible
with the mid-Z scheme, double-check the power-stage data sheet for compabitility. The PWM start register
(0x18) programs the TAS5086 for mid-Z or the standard low-Z start sequence.
14
Copyright 2005–2008, Texas Instruments Incorporated
Product Folder Link(s): TAS5086
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TAS5086DBT 制造商:Texas Instruments 功能描述:IC DGTL AUDIO PWM 6CH 38-TSSOP 制造商:Texas Instruments 功能描述:IC, DGTL AUDIO PWM 6CH 38-TSSOP 制造商:Texas Instruments 功能描述:IC, DGTL AUDIO PWM 6CH 38-TSSOP; Audio Control Type:Digital; Supply Voltage Range:3V to 3.6V; Control Interface:I2C, Serial; Audio IC Case Style:TSSOP; No. of Pins:38; Operating Temperature Min:0C; Operating Temperature Max:70C; ;RoHS Compliant: Yes
TAS5086DBTG4 功能描述:音頻 DSP 6 Ch Digital Audio PWM Processor RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube
TAS5086DBTR 功能描述:音頻 DSP 6 Ch Digital Audio PWM Processor RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube
TAS5086DBTRG4 功能描述:音頻 DSP 6 Ch Digital Audio PWM Processor RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube
TAS5100 制造商:TI 制造商全稱:Texas Instruments 功能描述:TRUE DIGITAL AUDIO AMPLIFIER TAS5100A PWM POWER OUTPUT STAGE
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