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TFA9887 PDF даташит

Спецификация TFA9887 изготовлена ​​​​«NXP Semiconductors» и имеет функцию, называемую «Audio system».

Детали детали

Номер произв TFA9887
Описание Audio system
Производители NXP Semiconductors
логотип NXP Semiconductors логотип 

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TFA9887 Даташит, Описание, Даташиты
TFA9887
Audio system with adaptive sound maximizer and speaker
protection
Rev. 1 — 11 July 2012
Product short data sheet
1. General description
The TFA9887 is an audio system consisting of a high efficiency class-D audio amplifier,
and embedded DSP with a sophisticated speaker-boost and protection algorithm and an
intelligent DC-to-DC converter. It can safely deliver 2.65 W (RMS; THD = 1 %) output
power into a 4 speaker that is nominally only rated for 0.5 W. The integrated intelligent
DC-to-DC converter allows the system to deliver this power from a battery voltage of
3.6 V. The audio input interface is I2S and the control settings are communicated via an
I2C-bus interface.
The TFA9887 guarantees safe speaker operation under all operating conditions. It
maximizes acoustic output while ensuring diaphragm displacement and voice coil
temperature do not exceed rated limits. The processing is capable of providing a
significant improvement in sound volume and quality, while also ensuring reliable
operation. This function is based on and adaptive model that operates in all loudspeaker
environments (e.g. free air, closed box or vented box). Furthermore, advanced signal
processing ensures the quality of the audio signal is always optimized.
Adaptive DC-to-DC conversion boosts the supply voltage only when necessary (when the
output signal level is high). This maximizes the output power of the class-D audio amplifier
while limiting quiescent power consumption. The TFA9887 also adapts the amplifier gain
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to limit battery current when the battery voltage is low.
The device features low RF susceptibility because it has a digital input interface that is
insensitive to clock jitter. The second order closed loop architecture used in a class-D
audio amplifier provides excellent audio performance and high supply voltage ripple
rejection.
The TFA9887 is available in a 29-bump WLCSP (Wafer Level Chip-Size Package) with a
400 m pitch.
2. Features and benefits
Sophisticated speaker-boost and protection algorithm that maximizes speaker
performance while protecting the speaker:
Fully embedded software, no additional license fee or porting required.
Total integrated solution that includes DSP, amplifier, DC-to-DC, sensing and more.
Adaptive excursion control - guarantees that the speaker membrane excursion never
exceeds its rated limit
Real-time temperature protection - direct measurement ensures that voice coil
temperature never exceeds its rated limit
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TFA9887 Даташит, Описание, Даташиты
NXP Semiconductors
TFA9887
Audio system with adaptive sound maximizer and speaker protection
Environmentally aware - automatically adapts speaker parameters to acoustic and
thermal changes including compensation for speaker-box leakage
Output power: 2.65 W (RMS) into 4 at 3.6 V supply voltage (THD = 1 %)
Clip avoidance - DSP algorithm prevents clipping even with sagging supply voltage
Bandwidth extension option to increase low frequency response
Intelligent DC-to-DC converter maximizes audio headroom from any supply level and
limits current consumption at low battery voltages
Compatible with standard Acoustic Echo Cancellers (AECs)
High efficiency and low-power dissipation
High efficiency and low-power dissipation
Wide supply voltage range (fully operational from 2.5 V to 5.5 V)
Two I2S inputs to support two audio sources
I2C-bus control interface (400 kHz)
Dedicated speech mode with speech activity detector
Speaker current and voltage monitoring (via the I2S-bus) for Acoustic Echo
Cancellation (AEC) at the host
Fully short-circuit proof across the load and to the supply lines
Sample frequencies from 8 kHz to 48 kHz supported
3 bit clock/word select ratios supported (32x, 48x, 64x)
Option to route I2S input direct to I2S output to allow a second I2S output slave device
to be used in combination with the TFA9887
TDM interface supported
Volume control
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Low RF susceptibility
Input clock jitter insensitive interface
Thermally protected
‘Pop noise' free at all mode transitions
3. Applications
Mobile phones
Tablets
Ultrabooks and Notebooks
Portable gaming devices
Portable Navigation Devices (PND)
MP3 players and portable media players
TFA9887_SDS
Product short data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 11 July 2012
© NXP B.V. 2012. All rights reserved.
2 of 20
Datasheet pdf - http://www.DataSheet4U.co.kr/









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TFA9887 Даташит, Описание, Даташиты
NXP Semiconductors
TFA9887
Audio system with adaptive sound maximizer and speaker protection
4. Quick reference data
Table 1.
Symbol
VBAT
VDDD
IBAT
Quick reference data
Parameter
battery supply voltage
digital supply voltage
battery supply current
IDDD digital supply current
Po(RMS) RMS output power
Conditions
on pin VBAT
on pin VDDD
on pin VBAT and in DC-to-DC converter coil;
operating modes with load; DC-to-DC
converter in Adaptive boost mode
on pin VBAT and in DC-to-DC converter coil;
Power-down mode
on pin VDDD; operating modes;
speaker-boost and protection activated
on pin VDDD; operating modes; CoolFlux
DSP bypassed
on pin VDDD; Power-down mode;
BCK1 = WS1 = DATAI1 = BCK2 = WS2 =
DATAI2 = DATAI3 = 0 V
CLIP = 00
RL = 4 ; fs = 48 kHz
RL = 4 ; fs = 32 kHz
RL = 8 ; fs = 48 kHz
RL = 8 ; fs = 32 kHz
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5. Ordering information
Min Typ Max Unit
2.5 -
5.5 V
1.65 1.8 1.95 V
- 1.55 - mA
- - 1 A
- 20 - mA
- 4.8 - mA
- 10 - A
- 2.55 - W
- 2.65 - W
- 1.5 - W
- 1.65 - W
Table 2. Ordering information
Type number Package
Name
Description
TFA9887UK WLCSP29 wafer level chip-size package; 29 bumps; 3.19 2.07 mm
Version
TFA9887
TFA9887_SDS
Product short data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 11 July 2012
© NXP B.V. 2012. All rights reserved.
3 of 20
Datasheet pdf - http://www.DataSheet4U.co.kr/










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