參數(shù)資料
型號(hào)： TS4962EIKJT
廠商： STMICROELECTRONICS
元件分類(lèi)： 音頻／視頻放大
英文描述： 3 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA9
封裝： LEAD FREE, FLIP CHIP, 9 PIN
文件頁(yè)數(shù)： 21/37頁(yè)
文件大?。?/td> 834K
代理商： TS4962EIKJT
Application Information
TS4962
28/37
4.5
Decoupling of the circuit
A power supply capacitor is needed to correctly bypass the TS4962, referred to as CS.
The TS4962 has a typical switching frequency at 250kHz and output fall and rise time of about
5ns. Due to these very fast transients, careful decoupling is mandatory.
A 1F ceramic capacitor is enough, but it must be located very close to the TS4962 in order to
avoid any extra parasitic inductance created by an overly long track wire. These parasitic
inductances introduce, in relation with dI/dt, overvoltage that decreases the global efficiency
and may cause, if this parasitic inductance is too high, a TS4962 breakdown.
In addition, even if a ceramic capacitor has an adequate high frequency ESR value, its current
capability is also important. A 0603 size is a good compromise, particularly when a 4
load is
used.
Note that CS has particular influence on the THD+N in the medium- and high-frequency
regions.
4.6
Wake-up time: TWU
When the standby is released to set the device ON, there is a wait of about 5ms. The TS4962
has an internal digital delay that mutes the outputs and releases them after this time in order to
avoid any pop noise.
4.7
Shutdown time
When the standby command is set, the time required to put the two output stages into high
impedance and to put the internal circuitry in shutdown mode, is about 5ms. This time is used
to decrease the gain and avoid any pop noise during shutdown.
4.8
Consumption in shutdown mode
Between the shutdown pin and GND there is an internal 300k
resistor. This resistor forces the
TS4962 to be in shutdown mode when the shutdown input is left floating.
However, this resistor also introduces additional shutdown power consumption if the shutdown
pin voltage is not 0V.
Referring to
Table 2: Operating conditions on page 2, with a 0.4V shutdown voltage pin for
example, we have 0.4V/300k
= 1.3A in typical (0.4V/273k = 1.46A at the maximum) to
add to the shutdown current specified in the tables in
相關(guān)PDF資料
PDF描述
TS4962EKIJT 3 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA9
TS4962IJT 3 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA9
TS4962IQT 2.8 W, 1 CHANNEL, AUDIO AMPLIFIER, DSO8
TS4962MEIJT 3 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA9
TS4972IJT 1.2 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA8
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TS4962EKIJT 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:3W Filter-free Class D Audio Power Amplifier
TS4962IJT 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:3W Filter-free Class D Audio Power Amplifier
TS4962IQ 制造商:STMicroelectronics 功能描述:
TS4962IQT 功能描述:音頻放大器 3W Class D w/standby RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
TS4962M 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:3W filter-free class D audio power amplifier
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