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参数资料
型号： TFA9812HN
厂商： NXP SEMICONDUCTORS
元件分类： 音频／视频放大
英文描述： 15 W, 2 CHANNEL, AUDIO AMPLIFIER, PQCC48
封装： 7 X 7 MM, 0.85 MM HEIGHT, PLASTIC, MO-220, SOT619-8, HVQFN-48
文件页数： 18/66页
文件大小： 386K
代理商： TFA9812HN
TFA9812_2
NXP B.V. 2009. All rights reserved.
Preliminary data sheet
Rev. 02 — 22 January 2009
25 of 66
NXP Semiconductors
TFA9812
BTL stereo Class-D audio amplier with I2S input
8.7.6 Overdissipation protection
When the output current of the power ampliers exceeds a current value of 3 A and the
temperature is above 140
°C, overdissipation protection is activated and the device enters
Sleep mode. A restart will be initiated automatically when the two overdissipation
conditions are both changed to ‘false’.
Overdissipation is agged by a low DIAG pin and by a high DIAG I2C status bit, see
Section 9.5.10.
Under normal conditions thermal foldback prevents overdissipation protection from being
triggered. I2C settings remain valid.
8.7.7 Window protection
Window protection is a feature for protecting the device against shorts from the outputs to
the ground or supply lines. If during power-up one of the outputs is shorted to VSSPx or
VDDP, power-up does not proceed any further. The trigger levels for these conditions are:
OUTxx > VDDA 1 V, or
OUTxx < REFA + 1 V.
The WP alarm is agged by a low DIAG pin and by a high DIAG I2C status bit, see
Section 9.5.10.
8.7.8 Lock protection
When the selected clock input source (MCLK, BCK or crystal) stops running, the TFA9812
is able to detect this and set the output stages to 3-state mode. Without this protection
peripheral devices in an application might be damaged.
The PLL lock indication is an I2C reading and will be ‘false’ in the event of a clock
interruption, see Section 9.5.10.
8.7.9 Underfrequency protection
UFP sets the output stages to 3-state mode when the clock input source is too low. The
PWM switching frequency can becomes critically low when the clock input source is lower
than specied. Without UFP peripheral devices in an application might be damaged.
The status of the UFP is shown in I2C reading register, see Section 9.5.10.
8.7.10 Overfrequency protection
OFP sets the output stages to 3-state mode when the clock input source is too high. The
PWM controller can become unstable when the clock input source is higher than
specied. Without OFP peripheral devices in an application might be damaged.
The status of the OFP is shown in I2C reading register, see Section 9.5.10.
Table 20.
Undervoltage trigger levels
Pin name
UVP level
DIAG pin (protection active)
Min
Max
VDDA
≥ 7 V
< 8 V
LOW
VDDA(3V3)
≥ 1.6 V
< 3 V
-
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TFA9812HN/N1,518 功能描述:IC AMP AUDIO 15W STER D 48HVQFN RoHS:是 类别:集成电路 (IC) >> 线性 - 音頻放大器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:DirectDrive® 类型:H 类 输出类型:耳机，2-通道（立体声） 在某负载时最大输出功率 x 通道数量:35mW x 2 @ 16 欧姆 电源电压:1.62 V ~ 1.98 V 特点:I²C，麦克风，静音，短路保护，音量控制 安装类型:表面贴装 供应商设备封装:25-WLP（2.09x2.09） 封装/外壳:25-WFBGA，WLCSP 包装:带卷 (TR)
TFA9812HN/N1,557 功能描述:IC AMP AUDIO 15W STER D 48HVQFN RoHS:是 类别:集成电路 (IC) >> 线性 - 音頻放大器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:DirectDrive® 类型:H 类 输出类型:耳机，2-通道（立体声） 在某负载时最大输出功率 x 通道数量:35mW x 2 @ 16 欧姆 电源电压:1.62 V ~ 1.98 V 特点:I²C，麦克风，静音，短路保护，音量控制 安装类型:表面贴装 供应商设备封装:25-WLP（2.09x2.09） 封装/外壳:25-WFBGA，WLCSP 包装:带卷 (TR)
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TFA9815T 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Stereo full-bridge audio amplifier 2 x 17 W
TFA9815T/N1 制造商:NXP Semiconductors 功能描述:Tube
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