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参数资料
| 型号： | TS4990EIJT |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 1.2 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA9 |
| 封装： | LEAD FREE, FCP-9 |
| 文件页数： | 14/32页 |
| 文件大小： | 714K |
| 代理商： | TS4990EIJT |
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TS4990
Application information
21/32
4.6
Wake-up time (tWU)
When the standby is released to put the device ON, the bypass capacitor Cb is not charged
immediately. Because Cb is directly linked to the bias of the amplifier, the bias will not work
properly until the Cb voltage is correct. The time to reach this voltage is called wake-up time
or tWU and specified in the electrical characteristics tables with Cb =1F.
time.
Figure 61.
Typical wake-up time vs. Cb
Due to process tolerances, the maximum value of wake-up time is shown in Figure 62.
Figure 62.
Maximum wake-up time vs. Cb
Note:
The bypass capacitor Cb also has a typical tolerance of +/-20%. To calculate the wake-up
time with this tolerance, refer to the graph above (considering for example for Cb=1 F in the
range of 0.8 F
≤Cb≤1.2 F).
4.7
Standby time
When the standby command is set, the time required to put the two output stages in high
impedance and the internal circuitry in standby mode is a few microseconds. In standby
mode, the bypass pin and Vin pin are short-circuited to ground by internal switches. This
allows a quick discharge of Cb and Cin capacitors.
12
34
0
100
200
300
400
500
600
4.7
0.1
Tamb=25
°C
Vcc=2.6V
Vcc=3.3V
Vcc=5V
St
ar
tup
Ti
me
(
m
s)
Bypass Capacitor Cb ( F)
12
34
0
100
200
300
400
500
600
Tamb=25
°C
4.7
0.1
Vcc=5V
Vcc=3.3V
Vcc=2.6V
Max.
St
ar
tup
Ti
me
(
m
s)
Bypass Capacitor Cb ( F)
相关PDF资料 |
PDF描述 |
|---|---|
| TS4990IST | 1.2 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| TS4990IQT | 1.2 W, 1 CHANNEL, AUDIO AMPLIFIER, DSO8 |
| TS4990IJT | 1.2 W, 1 CHANNEL, AUDIO AMPLIFIER, PBGA9 |
| TS4990ID | 1.2 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
| TS4990IDT | 1.2 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO8 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| TS4990EIKJT | 功能描述:音频放大器 1.2W audio 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 |
| TS4990EKIJT | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:1.2 W audio power amplifier with active low standby mode |
| TS4990ID | 功能描述:音频放大器 1.2W audio 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 |
| TS4990IDT | 功能描述:音频放大器 1.2W audio 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 |
| TS4990IJT | 制造商:ST 功能描述:1W AUDIO POWER AMPLIFIER WITH ACTIVE LOW STANDBY MODE |
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