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参数资料
| 型号： | TAS5121DKDR |
| 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, PDSO36 |
| 封装： | GREEN, PLASTIC, HSSOP-36 |
| 文件页数： | 4/21页 |
| 文件大小： | 591K |
| 代理商： | TAS5121DKDR |
TAS5121
SLES086A NOVEMBER 2003 REVISED MARCH 2004
www.ti.com
12
Overtemperature (OT) Protection
A dual temperature protection system asserts a warning
signal when the device junction temperature exceeds
115
°C and shuts down the device when the junction
temperature exceeds 150
°C. The OT protection circuit is
shared by both half-bridges.
Undervoltage Protection (UVP)
Undervoltage lockout occurs when GVDD is insufficient
for proper device operation. The UV protection system
protects the device under fault power-up and power-down
situations by shutting the device down. The UV protection
circuits are shared by both half-bridges.
Reset Function
The reset has two functions:
D Reset is used for re-enabling operation after a
latched error event.
D Reset is used for disabling output stage
switching, hard mute function. Use modulator
control for soft mute.
In protection modes where the reset input functions as the
means to re-enable operation after an error event, the error
latch is cleared on the falling edge of reset and normal
operation is resumed on the rising edge of RESET.
PROTECTION MODE
Autorecovery (AR) After Errors (PMODE0)
In autorecovery mode (PMODE0) the TAS5121 is
self-supported in handling of error situations. All protection
systems are active, setting the output stage in the
high-impedance state to protect the output stage and
connected equipment. However, after a short time the
device autorecovers, i.e., operation is automatically
resumed provided that the system is fully operational.
The autorecovery timing is set by counting PWM input
cycles, i.e., the timing is relative to the switching frequency.
The AR system is common to both half-bridges.
Timing and Function
The function of the autorecovery circuit is as follows:
1.
An error event occurs and sets the
protection latch (output stage goes Hi-Z).
2.
The counter is started.
3.
After n/2 cycles, the protection latch is
cleared but the output stage remains Hi-Z
(identical to pulling RESET low).
4.
After
n cycles, operation is resumed
(identical to pulling RESET high) (n = 512).
Error
Protection
Latch
Shutdown
Autorecovery
SD
PWM
Counter
AR-RESET
Figure 9. Autorecovery Function
Latching Shutdown on All Errors (PMODE1)
In latching shutdown mode, all error situations result in a
power down (output stage Hi-Z). Re-enabling can be done
by toggling the RESET pin.
All Protection Systems Disabled (PMODE2)
In PMODE2, all protection systems are disabled. This
mode is purely intended for testing and characterization
purposes and thus not recommended for normal device
operation.
MODE Pins Selection
The protection mode is selected by connecting M1/M2 to
DREG or DGND according to Table 2.
Table 2. Protection Mode Selection
M1
M2
PROTECTION MODE
0
Autorecovery after errors (PMODE 0)
0
1
Latched shutdown on all errors
1
0
Reserved
1
Reserved
The output configuration mode is selected by connecting
the M3 pin to DREG or DGND according to Table 3.
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| TAS5121DKDRE4 | 功能描述:音频放大器 TAS5121 Digital Amp 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 |
| TAS5121I | 制造商:TI 制造商全称:Texas Instruments 功能描述:DIGITAL AMPLIIFIER POWER STAGE |
| TAS5121IDKD | 功能描述:音频放大器 Digital Amplifier 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 |
| TAS5121IDKDE4 | 功能描述:音频放大器 Digital Amplifier 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 |
| TAS5121IDKDR | 功能描述:音频放大器 Digital Amplifier 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 |
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