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参数资料
| 型号： | TDA7575BPD |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 50 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO36 |
| 封装： | ROHS COMPLIANT, SOP-36 |
| 文件页数： | 18/32页 |
| 文件大小： | 487K |
| 代理商： | TDA7575BPD |
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TDA7575B
Diagnostics functional description
Doc ID 14103 Rev 2
7.2
Permanent diagnostics
Detectable conventional faults are:
–
Short to GND
–Short to Vs
–
Short across the speaker
The following additional features are provided:
–
Output offset detection
The TDA7575B has 2 operating statuses:
1.
RESTART mode. The diagnostic is not enabled. Each audio channel operates
independently from each other. If any of the a.m. faults occurs, only the channel(s)
interested is shut down. A check of the output status is made every 1 ms (fig. 30).
Restart takes place when the overload is removed.
2.
DIAGNOSTIC mode. It is enabled via I2C bus and self activates if an output overload
(such to cause the intervention of the short-circuit protection) occurs to the speakers
outputs. Once activated, the diagnostics procedure develops as follows (fig. 31):
–
To avoid momentary re-circulation spikes from giving erroneous diagnostics, a
check of the output status is made after 1ms: if normal situation (no overloads) is
detected, the diagnostic is not performed and the channel returns back active.
–
Instead, if an overload is detected during the check after 1 ms, then a diagnostic
cycle having a duration of about 100 ms is started.
–
After a diagnostic cycle, the audio channel interested by the fault is switched to
RESTART mode. The relevant data are stored inside the device and can be read
by the microprocessor. When one cycle has terminated, the next one is activated
by an I2C reading. This is to ensure continuous diagnostics throughout the car-
radio operating time.
–
To check the status of the device a sampling system is needed. The timing is
chosen at microprocessor level (over than half a second is recommended).
Figure 35.
Restart timing without diagnostic enable (permanent)
each 1ms time, a sampling of the fault is done
Figure 36.
Restart timing with diagnostic enable (permanent)
circuit protection intervention
t
1-2mS
1mS
Overcurrent and short
(i.e. short circuit to GND)
Short circuit removed
Out
circuit protection intervention
t
Overcurrent and short
(i.e. short circuit to GND)
Short circuit removed
1mS
100mS
1mS
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相关代理商/技术参数 |
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| TDA7575BPDTR | 功能描述:音频放大器 2 x 75W Multifunct Dual-Bridge Pwr Amp 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 |
| TDA7575PD | 功能描述:音频放大器 INFOTAINMENT S PWR 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 |
| TDA7575PDTR | 功能描述:音频放大器 INFOTAINMENT S PWR 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 |
| TDA7576B | 制造商:STMicroelectronics 功能描述:Dual bridge MOSFET power amplifier for 24V systems |
| TDA7577BLV | 功能描述:Amplifier IC 2-Channel (Stereo) Class AB 27-Flexiwatt (Vertical) 制造商:stmicroelectronics 系列:- 包装:管件 零件状态:有效 类型:AB 类 输出类型:2 通道（立体声） 不同负载时的最大输出功率 x 通道数:45W x 2 @ 4 欧姆 电压 - 电源:6 V ~ 18 V 特性:静音，短路保护，待机 安装类型:通孔 工作温度:-40°C ~ 105°C（TA） 供应商器件封装:27 Flexiwatt（垂直） 封装/外壳:27 Flexiwatt（成型引线） 标准包装:17 |
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