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参数资料
| 型号： | TAS5611PHDR |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 125 W, 2 CHANNEL, AUDIO AMPLIFIER, PQFP64 |
| 封装： | GREEN, HTQFP-64 |
| 文件页数： | 13/27页 |
| 文件大小： | 1959K |
| 代理商： | TAS5611PHDR |
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SLAS709 – JUNE 2010
www.ti.com
ERROR REPORTING
The SD, OTW, OTW1 and OTW2 pins are active low, open-drain outputs. Their function is for protection-mode
signaling to a PWM controller or other system-control device.
Any fault resulting in device shutdown is signaled by the SD pin going low. Likewise, OTW and OTW2 goes low
when the device junction temperature exceeds 125°C and OTW1 goes low when the junction temperature
exceeds 100°C (see the following table).
OTW2,
SD
OTW1
DESCRIPTION
OTW
0
Overtemperature (OTE) or overload (OLP) or undervoltage (UVP)
Overload (OLP) or undervoltage (UVP). Junction temperature higher than 100°C (overtemperature
0
1
warning)
0
1
Overload (OLP) or undervoltage (UVP)
1
0
Junction temperature higher than 125°C (overtemperature warning)
1
0
1
Junction temperature higher than 100°C (overtemperature warning)
1
Junction temperature lower than 100°C and no OLP or UVP faults (normal operation)
Note that asserting either RESET low forces the SD signal high, independent of faults being present. TI
recommends monitoring the OTW signal using the system microcontroller and responding to an overtemperature
warning signal by, e.g., turning down the volume to prevent further heating of the device resulting in device
shutdown (OTE).
To reduce external component count, an internal pullup resistor to 3.3V is provided on both SD and OTW
outputs. Level compliance for 5V logic can be obtained by adding external pullup resistors to 5V (see the
Electrical Characteristics table of this data sheet for further specifications).
DEVICE PROTECTION SYSTEM
The TAS5611A contains advanced protection circuitry carefully designed to facilitate system integration and ease
of use, as well as to safeguard the device from permanent failure due to a wide range of fault conditions such as
short circuits, overload, overtemperature, and undervoltage. The TAS5611A responds to a fault by immediately
setting the power stage in a high-impedance (Hi-Z) state and asserting the SD pin low. In situations other than
overload and overtemperature error (OTE), the device automatically recovers when the fault condition has been
removed, i.e., the supply voltage has increased.
The device will function on errors, as shown in the following table.
BTL Mode
PBTL Mode
SE Mode
Local error in
Turns Off or in
Local error in
Turns Off or in
Local error in
Turns Off or in
A
A+B
B
A+B+C+D
C
C+D
D
Bootstrap UVP does not shutdown according to the table, it shuts down the respective halfbridge.
PIN-TO-PIN SHORT CIRCUIT PROTECTION (PPSC)
The PPSC detection system protects the device from permanent damage if a power output pin (OUT_X) is
shorted to GND_X or PVDD_X. For comparison, the OC protection system detects an over current after the
demodulation filter where PPSC detects shorts directly at the pin before the filter. PPSC detection is performed at
startup i.e. when VDD is supplied, consequently a short to either GND_X or PVDD_X after system startup will not
activate the PPSC detection system. When PPSC detection is activated by a short on the output, all half bridges
are kept in a Hi-Z state until the short is removed, the device then continues the startup sequence and starts
switching. The detection is controlled globally by a two step sequence. The first step ensures that there are no
shorts from OUT_X to GND_X, the second step tests that there are no shorts from OUT_X to PVDD_X. The total
duration of this process is roughly proportional to the capacitance of the output LC filter. The typical duration is
20
Copyright 2010, Texas Instruments Incorporated
Product Folder Link(s): TAS5611A
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相关代理商/技术参数 |
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| TAS5612 | 制造商:TI 制造商全称:Texas Instruments 功能描述:125W STEREO / 250W MONO PurePath? HD DIGITAL-INPUT POWER STAGE |
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| TAS5612APHD | 功能描述:音频放大器 125W Stereo/250W Mono PurePath 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 |
| TAS5612APHDR | 功能描述:音频放大器 125W Stereo/250W Mono PurePath 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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