- 您现在的位置：买卖IC网 > PDF目录98163 > TAS5342LDDVRG4 (TEXAS INSTRUMENTS INC) 100 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO44 PDF资料下载
参数资料
| 型号： | TAS5342LDDVRG4 |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 100 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO44 |
| 封装： | GREEN, PLASTIC, HTSSOP-44 |
| 文件页数： | 14/29页 |
| 文件大小： | 839K |
| 代理商： | TAS5342LDDVRG4 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页当前第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页
www.ti.com
Mid Z Sequence Compatability
DEVICE PROTECTION SYSTEM
ERROR REPORTING
Use of TAS5342L in High-Modulation-Index
SLAS558 – OCTOBER 2007
Characteristics section of this data sheet). Although
signal
using
the
system
microcontroller
and
not specifically required, it is a good practice to hold
responding to an overtemperature warning signal by,
RESET_AB and RESET_CD low during power down,
e.g., turning down the volume to prevent further
thus preventing audible artifacts including pops or
heating of the device resulting in device shutdown
clicks.
(OTE).
When the TAS5342L is being used with TI PWM
To reduce external component count, an internal
modulators
such
as
the
TAS5518,
no
special
pullup resistor to 3.3 V is provided on both SD and
attention to the state of RESET_AB and RESET_CD
OTW outputs. Level compliance for 5-V logic can be
is required, provided that the chipset is configured as
obtained by adding external pullup resistors to 5 V
recommended.
(see the Electrical Characteristics section of this data
sheet for further specifications).
The TAS5342L is compatable with the Mid Z
sequence of the TAS5086 Modulator. The Mid Z
The TAS5342L contains advanced protection circuitry
Sequence is a series of pulses that is generated by
carefully designed to facilitate system integration and
the modulator. This sequence causes the power
ease of use, as well as to safeguard the device from
stage to slowly enable its outputs as it begins to
permanent failure due to a wide range of fault
switch.
conditions
such
as
short
circuits,
overload,
overtemperature, and undervoltage. The TAS5342L
By slowly starting the PWM switching, the impulse
responds to a fault by immediately setting the power
response created by the onset of switching is
stage in a high-impedance (Hi-Z) state and asserting
reduced. This impulse response is the acoustic
the SD pin low. In situations other than overload and
artifact that is heard in the output transducers
over-temperature
error
(OTE),
the
device
(loudspeakers) and is commonly termed "click" or
automatically recovers when the fault condition has
"pop".
been removed, i.e., the supply voltage has increased.
The low acoustic artifact noise of the TAS5342L will
The device will function on errors, as shown in the
be further decreased when used in conjunction with
following table.
the TAS5086 modulator with the Mid Z Sequence
BTL MODE
PBTL MODE
SE MODE
enabled.
Local
The Mid Z sequence is primarily used for the
Error
Turns Off
Error
Turns Off
Error
Turns Off
single-ended output configuration. It facilitates a
In
"softer" PWM output start after the split cap output
A
A + B
configuration is charged.
B
A + B + C
+ D
C
C + D
D
The
SD
and
OTW
pins
are
both
active-low,
open-drain
outputs.
Their
function
is
for
Bootstrap UVP does not shutdown according to the
protection-mode signaling to a PWM controller or
table, it shutsdown the respective halfbridge.
other system-control device.
Any fault resulting in device shutdown is signaled by
Capable Systems
the SD pin going low. Likewise, OTW goes low when
the device junction temperature exceeds 125
°C (see
This device requires at least 30 ns of low time on the
the following table).
output per 384-kHz PWM frame rate in order to keep
the bootstrap capacitors charged. As an example, if
SD
OTW
DESCRIPTION
the modulation index is set to 99.2% in the TAS5508,
0
Overtemperature (OTE) or overload (OLP) or
this setting allows PWM pulse durations down to 10
undervoltage (UVP)
ns. This signal, which does not meet the 30-ns
0
1
Overload (OLP) or undervoltage (UVP)
requirement, is sent to the PWM_X pin and this
1
0
Junction temperature higher than 125
°C
low-state pulse time does not allow the bootstrap
(overtemperature warning)
capacitor to stay charged. The TAS5342L device
1
Junction temperature lower than 125
°C and no
requires limiting the TAS5508 modulation index to
OLP or UVP faults (normal operation)
97.7% to keep the bootstrap capacitor charged under
all signals and loads.
Note that asserting either RESET_AB or RESET_CD
low forces the SD signal high, independent of faults
The TAS5342L contains a bootstrap capacitor under
being present. TI recommends monitoring the OTW
voltage protection circuit (BST_UVP) that monitors
the voltage on the bootstrap capacitors. When the
Copyright 2007, Texas Instruments Incorporated
21
Product Folder Link(s): TAS5342L
相关PDF资料 |
PDF描述 |
|---|---|
| TAS5342LDDVR | 100 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO44 |
| TAS5342LDDV | 100 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO44 |
| TAS5352ADDV | 125 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO44 |
| TAS5352ADDVR | 125 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO44 |
| TAS5414ATPHDMQ1 | 116 W, 4 CHANNEL, AUDIO AMPLIFIER, PQFP64 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TAS5352 | 制造商:TI 制造商全称:Texas Instruments 功能描述:125 W STEREO DIGITAL AMPLIFIER POWER STAGE |
| TAS5352A | 制造商:TI 制造商全称:Texas Instruments 功能描述:125 W STEREO DIGITAL AMPLIFIER POWER STAGE |
| TAS5352ADDV | 功能描述:音频放大器 125W Stereo Dig Amp Pwr Stage RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| TAS5352ADDVR | 功能描述:音频放大器 125W Stereo Dig Amp Pwr Stage RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| TAS5352DDV | 功能描述:音频放大器 125W Class D Stereo Power Stage RoHS:否 制造商:STMicroelectronics 产品:General Purpose Audio Amplifiers 输出类型:Digital 输出功率: THD + 噪声: 工作电源电压:3.3 V 电源电流: 最大功率耗散: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
发布紧急采购，3分钟左右您将得到回复。