Data Sheet

TFA9882
3.4 W I2S input mono class-D audio amplifier
Rev. 2 — 20 April 2011
Product data sheet
1. General description
The TFA9882 is a mono, filter-free class-D audio amplifier in a 9-bump WLCSP (Wafer
Level Chip-Size Package) with a 400 μm pitch.
It receives audio and control settings via an I2S digital interface. The Power-down to
Operating mode transition is triggered when a clock signal is detected on the bit clock
input (BCK). Two devices can be combined to build a stereo application.
In stereo applications, the left or right I2S audio stream is selected by connecting the word
select signal to, respectively, pin WSL or pin WSR. Mono mixing can be achieved by
connecting the word select signal to both WSL and WSR. Switching off the word select
signal selects Mute mode.
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 the TFA9882
provides excellent audio performance and high supply voltage ripple rejection.
2. Features and benefits
„
„
„
„
„
„
„
„
„
„
„
„
„
„
„
Small outline WLCSP9 package: 1.27 × 1.49 × 0.6 mm
Wide supply voltage range (fully operational from 2.5 V to 5.5 V)
High efficiency (90 %, 4 Ω/20 μH load) and low power dissipation
Quiescent power:
‹ 6.5 mW (VDDD = 1.8 V, VDDP = 3.6 V, 4 Ω/20 μH load, fs = 32 kHz)
‹ 7.65 mW (VDDD = 1.8 V, VDDP = 3.6 V, 4 Ω/20 μH load, fs = 48 kHz)
Output power:
‹ 1.4 W into 4 Ω at 3.6 V supply (THD = 1 %)
‹ 2.7 W into 4 Ω at 5.0 V supply (THD = 1 %)
‹ 3.4 W into 4 Ω at 5.0 V supply (THD = 10 %)
Output noise voltage: 24 μV (A-weighted)
Signal-to-noise ratio: 103 dB (VDDP = 5 V, A-weighted)
Fully short-circuit proof across load and to supply lines
Current limiting to avoid audio holes
Thermally protected
Undervoltage and overvoltage protection
High-pass filter for DC blocking
Simplified interface for audio and control settings
Left/right selection and mono mixing
Three gain settings: −3 dB, 0 dB and +3 dB
TFA9882
NXP Semiconductors
3.4 W I2S input mono class-D audio amplifier
„
„
„
„
„
„
„
„
„
„
Output slope setting for EMI reduction
Clip control for smooth clipping
Mute mode
Low RF susceptibility
Insensitive to input clock jitter
‘Pop noise' free at all mode transitions
Short power-up time: 4 ms
Short power-down time: 5 μs
1.8 V/3.3 V tolerant digital inputs
Only two external components required
3. Applications
„
„
„
„
„
„
PDAs
Mobile phones
Portable gaming devices
Portable Navigation Devices (PND)
Notebooks/netbooks
Portable media players
4. Quick reference data
Table 1.
Quick reference data
All parameters are guaranteed for VDDP = 3.6 V; VDDD = 1.8 V; RL = 4 Ω[1]; LL = 20 μH[1]; fi = 1 kHz;
fs = 48 kHz; Tamb = 25 °C; default settings, unless otherwise specified.
Symbol Parameter
Conditions
Min
Typ
Max
Unit
VDDP
power supply voltage
on pin VDDP
2.5
-
5.5
V
VDDD
digital supply voltage
on pin VDDD
1.65
1.8
1.95
V
IDDP
power supply current
Operating mode with load
-
1.5
1.7
mA
IDDD
Po(RMS)
digital supply current
RMS output power
Mute mode
-
1.1
1.25
mA
Power-down mode
-
0.1
1
μA
Operating mode
-
1.25
1.4
mA
Mute mode
-
1.1
1.2
mA
Power-down mode
BCK = WS = DATA = 0 V
-
2.5
10
μA
VDDP = 3.6 V, fi = 100 Hz
-
1.4
-
W
VDDP = 5.0 V, fi = 100 Hz
-
2.7
-
W
VDDP = 3.6 V, fi = 100 Hz
-
1.75
-
W
VDDP = 5.0 V, fi = 100 Hz
-
3.4
-
W
-
90
-
%
THD + N = 1 %
THD + N = 10 %
ηpo
[1]
TFA9882
Product data sheet
output power efficiency
Po(RMS) = 1.4 W
RL = load resistance; LL = load inductance.
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TFA9882
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3.4 W I2S input mono class-D audio amplifier
5. Ordering information
Table 2.
Ordering information
Type number
TFA9882UK
Package
Name
Description
Version
WLCSP9
wafer level chip-size package; 9 bumps; body 1.49 × 1.27 mm
TFA9882UK
6. Block diagram
VDDD
VDDP
B1
B2
MUTE CONTROL
LEFT/RIGHT
SELECTION
WSL
A2
WSR
C2
DATA
A1
BCK
C1
I2S
RECEIVER
TFA9882
HP
FILTER
PWM
C3
OUTA
A3
OUTB
H-BRIDGE
PROTECTION
CIRCUITS:
OTP
OVP
UVP
OCP
POWER DOWN
CONTROL
B3
GND
Fig 1.
TFA9882
Product data sheet
010aaa724
Block diagram of the TFA9882
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TFA9882
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3.4 W I2S input mono class-D audio amplifier
7. Pinning information
7.1 Pinning
TFA9882
1
2
TFA9882
bump A1
index area
3
1
C
A
B
B
A
C
bump A1
index area
010aaa725
3
010aaa726
Bottom view
Fig 2.
2
Transparent top view
Bump configuration for WLCSP9 (bottom view)
Fig 3.
Bump configuration for WLCSP9 (top view)
1
2
3
A
DATA
WSL
OUTB
B
VDDD
VDDP
GND
C
BCK
WSR
OUTA
010aaa727
Transparent top view
Fig 4.
Bump mapping for WLCSP9
7.2 Pin description
TFA9882
Product data sheet
Table 3.
Pin description
Symbol
Pin
Type
Description
DATA
A1
I
data input
WSL
A2
I
word select input left channel; connect to VDDP or PCB
ground if right channel is selected
OUTB
A3
O
inverting output
VDDD
B1
P
digital supply voltage (1.8 V)
VDDP
B2
P
power supply voltage (2.5 V to 5.5 V)
GND
B3
P
ground reference
BCK
C1
I
bit clock input
WSR
C2
I
word select input right channel; connect to VDDP or PCB
ground if left channel is selected
OUTA
C3
O
non-inverting output
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TFA9882
NXP Semiconductors
3.4 W I2S input mono class-D audio amplifier
8. Functional description
The TFA9882 is a high-efficiency mono Bridge Tied Load (BTL) class-D audio amplifier
with a digital stereo I2S input interface. A High-Pass (HP) filter removes the DC
components from the incoming I2S stream. This stream is subsequently converted into
two Pulse Width Modulated (PWM) signals. A 3-level PWM scheme supports filterless
speaker drive.
8.1 Mode selection and interfacing
The TFA9882 supports four operating modes:
• Power-down mode, with low supply current
• Mute mode, in which the output stages are floating so that the audio input signal is
suppressed
• Operating mode, in which the amplifier is fully operational, delivering an output signal
• Fault mode
The TFA9882 switches to Fault mode automatically when a protection mechanism is
activated (see Section 8.8). The defined patterns required on the BCK, WSL and WSR
inputs to select the other three modes are given in Table 4.
Power-down mode is selected when there is no bit clock signal on the BCK input.
Applying the bit clock signal will cause the TFA9882 to switch from Power-down mode to
Operating mode (provided the word select signal is switched on).
Mute mode is activated when the word select signal is switched off.
The left or right channel is selected by applying the word select signal to, respectively, the
WSL or the WSR terminal. The word select terminal not connected should be connected
to VDDP or to PCB ground. This simplifies the connection to the VDDP terminal in the
WLCSP9 package.
When the word select signal is connected to both terminals, the TFA9882 amplifies the
sum of both channels divided by two.
Table 4.
Mode selection
Mode
Channel
Power-down
Mute
Operating
Frequency on BCK
Frequency on WSL
Frequency on WSR
OUTA, OUTB
0 Hz
don’t care
don’t care
floating
2.048 MHz to 3.072 MHz
0 Hz
0 Hz
floating
left
2.048 MHz to 3.072 MHz
32 kHz to 48 kHz
0 Hz
switching
right
2.048 MHz to 3.072 MHz
0 Hz
32 kHz to 48 kHz
switching
32 kHz to 48 kHz
32 kHz to 48 kHz
switching
(left + right) / 2 2.048 MHz to 3.072 MHz
TFA9882
Product data sheet
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TFA9882
NXP Semiconductors
3.4 W I2S input mono class-D audio amplifier
8.2 I2S format
The TFA9882 supports the Philips I2S standard with a BCK frequency 64 times greater
than the sampling rate (64fs). The bit length can be from 8 to 32 bits. Supported I2S
sample rates are listed in Table 5 while Figure 5 illustrates the I2S data transfer format.
Table 5.
Supported I2S sample rates
fs (kHz)
WS (kHz)
BCK, 64fs (MHz)
32
32
2.048
44.1
44.1
2.8224
48
48
3.072
RIGHT
LEFT
WS
1
2
3
1
2
3
MSB
B2
BCK
DATA
MSB
B2
MSB
010aaa728
I2S-BUS FORMAT
MSB = Most Significant Bit; B2 = Second Most Significant Bit
Fig 5.
I2S format
8.3 Power-up/power-down sequence
The TFA9882 power-up/power-down sequence is shown in Figure 6. External power
supplies VDDP and VDDD should be within their operating limits before the TFA9882
switches to Operating mode. The TFA9882 should be switched to Power-down mode
before the power supplies are disconnected or turned off.
VDDD,
VDDP
64·fs clock signal
BCK
1·fs clock signal
WS
OUTA,
OUTB
switching
td(on)
Fig 6.
Operating
no clock signal
floating
Mute
1·fs clock signal
switching
Operating
td(off)
010aaa729
Power-up/power-down timing (without control settings)
TFA9882
Product data sheet
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TFA9882
NXP Semiconductors
3.4 W I2S input mono class-D audio amplifier
Table 6.
Power-up/power-down timing
All parameters are guaranteed for VDDP = 3.6 V; VDDD = 1.8 V; RL = 4 Ω[1]; LL = 20 μH[1]; fi = 1 kHz;
fs = 48 kHz; Tamb = 25 °C; default settings, unless otherwise specified.
Symbol Parameter
Min
Typ
Max
Unit
td(on)
turn-on delay time
Conditions
[2]
-
-
4
ms
td(off)
turn-off delay time
[2]
-
-
5
μs
[1]
RL = load resistance; LL = load inductance.
[2]
Inversely proportional to fs.
8.4 Control settings
If the device can operate effectively with the default settings, the control settings don’t
need to be changed.
8.4.1 Control setting pattern recognition
The TFA9882 can detect control settings via the I2S input. Control settings are selected by
transmitting control patterns on the DATA input during the power-up sequence (the first
12288 bit clock cycles). The word select signal (WS) must be switched off during this
interval. Figure 7 illustrates the control setting sequence. After receiving 128 consecutive
control setting bytes, the TFA9882 activates the appropriate control setting (see the third
column of Table 7). Control settings remain unchanged in all modes unless control pattern
0xAA is received or the VDDD supply voltage is removed.
Power-down
I2S data
Control settings
WS
1
2
12288
3
BCK
DATA
MSB
B2
LSB
MSB
B2
LSB
MSB
B2
LSB
MSB
B2
LSB
td(on)
010aaa731
LSB = Least Significant Bit; MSB = Most Significant Bit; B2 = Second Most Significant Bit
Fig 7.
Power-up/power-down timing (without control settings)
Table 7.
Byte
Related bytes[1]
Control settings
0xD2
0x69/B4/5A/2D/96/4B/A5
clip control on; see Section 8.4.2
0xD4
0x6A/35/9A/4D/A6/53/A9
gain = −3 dB (VDDP = 2.5 V); see Section 8.4.3
0xD8
0x6C/36/1B/8D/C6/63/B1
gain = +3 dB (VDDP = 5.0 V); see Section 8.4.3
0xE1
0xF0/78/3C/1E/0F/87/C3
slope low (EMC); see Section 8.4.4
0xE2
0x71/B8/5C/2E/17/8B/C5
Dynamic Power Stage Activation (DPSA) off; see
Section 8.4.5
0xAA
0x55
Default; no mute, reset settings to default
[1]
TFA9882
Product data sheet
Control settings
The related bytes are the bytes from the first column phase shifted by 1, 2, 3, 4, 5, 6 and 7 bits.
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TFA9882
NXP Semiconductors
3.4 W I2S input mono class-D audio amplifier
8.4.2 Clip control
TFA9882 clip control is off by default. Clip control can be turned on via control setting
0xD2 (see Section 8.4.1). The TFA9882 clips smoothly with clip control on. Output power
is at maximum with clip control off.
8.4.3 Gain selection
Signal conversion from digital audio to PWM modulated audio out is independent of
supply voltages VDDP and VDDD. At the default gain setting (0 dB), the audio output signal
level is just below the clipping point at a supply voltage of 3.6 V at −6 dBFS (peak) input.
The TFA9882 supports two further gain settings to support full output power at
VDDP = 2.5 V and VDDP = 5.0 V. The gain settings can be selected via control settings
0xD4 and 0xD8 (see Section 8.4.1).
Table 8 details the corresponding peak output voltage level at −6 dBFS for the three gain
settings.
Table 8.
Output voltage
All parameters are guaranteed for VDDP = 3.6 V; VDDD = 1.8 V; RL = 4 Ω[1], LL = 20 μH[1], fi = 1 kHz, fs = 48 kHz, Tamb = 25 °C,
default settings; unless otherwise specified.
Symbol
Parameter
Conditions
VoM
peak output voltage
at −6 dBFS (peak) digital input
[1]
Min
Typ
Max
Unit
gain = −3 dB, VDDP = 2.5 V, RL = 4 Ω
[1]
-
2.4
-
V
gain = 0 dB, VDDP = 3.6 V, RL = 4 Ω; default
[1]
-
3.4
-
V
gain = +3 dB, VDDP = 5.0 V, RL = 8 Ω
[1]
-
4.7
-
V
RL = load resistance; LL = load inductance.
8.4.4 PWM slope selection
The rise and fall times of the PWM output edges can be set to one of two values, as
detailed in Table 9. The default setting is ‘slope normal’ (10 ns with VDDP = 3.6 V). ‘Slope
low’ is selected via control setting 0xE1 (see Section 8.4.1). This function is implemented
to reduce ElectroMagnetic Interference (EMI).
Table 9.
Slope rise and fall times
Setting
Rise and fall times of the PWM output edges
slope low
40 ns with VDDP = 3.6 V
slope normal; default setting
10 ns with VDDP = 3.6 V
8.4.5 Dynamic Power Stage Activation (DPSA)
The TFA9882 uses DPSA to regulate current consumption in line with the level of the
incoming audio stream. This function switches off power stage sections that are not
needed, reducing current consumption.
Each of the TFA9882 H-bridge power stages is divided into eight sections. The number of
power stage sections activated depends on the level of the incoming audio stream. The
thresholds used by the DPSA to determine how many stages are switched on are given in
Table 10. The DPSA signal is used as a reference signal for switching power stage
sections on and off. The DPSA signal will rise in tandem with the rectified audio input
signal. When the rectified audio input signal falls, the DPSA decreases with a negative
exponential function, as illustrated in Figure 8.
TFA9882
Product data sheet
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TFA9882
NXP Semiconductors
3.4 W I2S input mono class-D audio amplifier
The DPSA function can be switched off via control setting 0xE2 (see Section 8.4.1). When
DPSA is off, all power stage sections are activated in Operating mode.
Table 10.
DPSA input levels
Setting
Number of power stage sections active
≤ 0.035 × full scale (−29 dBFS)
1
> 0.035 × full scale (−29 dBFS)
2
> 0.07 × full scale (−23 dBFS)
4
> 0.105 × full scale (−19.5 dBFS)
8
DPSA signal
0.105 × full scale
0.07 × full scale
0.035 × full scale
1 section
8 sections
4 sections
2 sections
010aaa713
Fig 8.
Dynamic Power Stage Activation
8.5 High-pass filter
The high-pass filter blocks the DC components in the incoming audio stream. The cut-off
frequency, fhigh(−3dB), is determined by the sampling frequency, fs, and is defined in
Equation 1:
– f s ⋅ ln ( 4095 ⁄ 4096 )
f high ( –3dB ) = ------------------------------------------------2⋅π
(1)
fhigh(−3dB) is about 1.9 Hz at a sampling frequency of 48 kHz. The high-pass filter is always
enabled.
8.6 PWM frequency
The TFA9882 translates the I2S input stream into an amplified 3-level PWM output signal.
The PWM switching frequency is linearly proportional to the sampling frequency, and is
defined in Equation 2.
f sw ( PWM ) = 8 ⋅ f s
(2)
The PWM switching frequency equals 384 kHz when the sampling frequency is 48 kHz.
TFA9882
Product data sheet
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TFA9882
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3.4 W I2S input mono class-D audio amplifier
8.7 Bandwidth
The TFA9882 output spectrum has a sigma-delta converter characteristic. Figure 9
illustrates the output power spectrum of the TFA9882 when it is receiving an I2S input
stream without audio content. The quantization noise is shaped above the band of
interest. The band of interest (bandwidth) is determined by the high corner frequency
where the noise is increasing. The bandwidth in Figure 9 scales with the sampling
frequency and is defined in Equation 3:
BW = 0.4535 ⋅ f s
(3)
010aaa709
−40
output
(dBFS)
−80
−120
−160
10
102
103
104
105
106
f (Hz)
Fig 9.
Output power spectrum, fs = 48 kHz
8.8 Protection mechanisms
The following protection circuits are included in the TFA9882:
•
•
•
•
OverTemperature Protection (OTP)
OverVoltage Protection (OVP)
UnderVoltage Protection (UVP)
OverCurrent Protection (OCP)
The reaction of the device to fault conditions differs depending on the protection circuit
involved.
8.8.1 OverTemperature Protection (OTP)
OTP prevents heat damage to the TFA9882. It is triggered when the junction temperature
exceeds Tact(th_prot). When this happens, the output stages are set floating. OTP is cleared
automatically via an internal timer (200 ms), after which the output stages will start to
operate normally again.
TFA9882
Product data sheet
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TFA9882
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3.4 W I2S input mono class-D audio amplifier
8.8.2 Supply voltage protection mechanisms (UVP and OVP)
UVP is activated, setting the outputs floating, if the supply voltage drops below the
undervoltage protection threshold, VP(uvp). This transition will be silent, without pop noise.
When the supply voltage rises above VP(uvp) again, the system will be restarted after
200 ms.
OVP is activated, setting the power stages floating, if the supply voltage rises above the
overvoltage protection threshold, VP(ovp). The power stages are re-enabled as soon as the
supply voltage drops below VP(ovp) again. The system will be restarted after 200 ms.
8.8.3 OverCurrent Protection (OCP)
OCP will detect a short circuit across the load or between one of the amplifier outputs and
one of the supply lines. If the output current exceeds the overcurrent protection threshold
(IO(ocp)), it will be limited to IO(ocp) while the amplifier outputs are switching (the amplifier is
not powered down completely). This is called current limiting. The amplifier can
distinguish between an impedance drop at the loudspeaker and a low-ohmic short circuit
across the load or to one of the supply lines. The impedance threshold depends on which
supply voltage is being used:
• In the event of a short circuit across the load or a short to one of the supply lines, the
audio amplifier is switched off completely. It will try to restart again after approximately
200 ms. If the short-circuit condition is still present after this time, this cycle will be
repeated. Average dissipation will be low because of the short duty cycle.
• In the event of an impedance drop (e.g. due to dynamic behavior of the loudspeaker),
the same protection mechanism will be activated. The maximum output current is
again limited to IO(ocp), but the amplifier will not switch off completely (thus preventing
audio holes from occurring). This will result in a clipped output signal without artifacts.
TFA9882
Product data sheet
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TFA9882
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3.4 W I2S input mono class-D audio amplifier
9. Internal circuitry
Table 11.
Internal circuitry
Pin
Symbol
A1
DATA
C1
BCK
Equivalent circuit
A1, C1
ESD
B3
010aaa714
B1
VDDD
B2
VDDP
B1, B2
ESD
B3
010aaa715
A2
WSL
C2
WSR
B2
A2, C2
ESD
B3
010aaa716
A3
OUTB
C3
OUTA
B2
A3, C3
B3
010aaa717
10. Limiting values
Table 12. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol Parameter
Conditions
Min
Max
Unit
−0.3
+5.5
V
VDDP
power supply voltage
on pin VDDP
VDDD
digital supply voltage
on pin VDDD
−0.3
+1.95
V
Tj
junction temperature
-
+150
°C
Tstg
storage temperature
−55
+150
°C
Tamb
ambient temperature
−40
+85
°C
Vx
voltage on pin x
TFA9882
Product data sheet
pins BCK and DATA
−0.3
+3.6
V
pins OUTA and OUTB
−0.6
VDDP + 0.6
V
pins WSL and WSR
−0.6
VDDP
V
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TFA9882
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3.4 W I2S input mono class-D audio amplifier
Table 12. Limiting values …continued
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol Parameter
VESD
electrostatic discharge voltage
Conditions
according to the Human Body Model (HBM)
pins OUTA and OUTB
Max
Unit
−8
+8
kV
−2
+2
kV
according to the Charge Device Model (CDM)
[1]
−500
+500
V
according to the Machine Model (MM)
[1]
−200
+200
V
any other pin
[1]
Min
[1]
Measurements taken on the TFA9882 in a HVSON10 package (engineering samples) due to handling restrictions with WLCSP9.
11. Thermal characteristics
Table 13.
Thermal characteristics
Symbol
Parameter
Conditions
Typ
Rth(j-a)
thermal resistance from junction to ambient
in free air; natural convection
[1]
JEDEC test board
2-layer application board
Ψj-top
[2]
thermal characterization parameter from
junction to top of package
[1]
Measured on a JEDEC high K-factor test board (standard EIA/JESD 51-7).
[2]
Value depends on where measurement is taken on package.
Unit
128
K/W
97
K/W
12
K/W
12. Characteristics
12.1 DC characteristics
Table 14. DC characteristics
All parameters are guaranteed for VDDP = 3.6 V; VDDD = 1.8 V; RL = 4 Ω[1]; LL = 20 μH[1]; fi = 1 kHz; fs = 48 kHz; Tamb = 25 °C,
default slope and gain settings; unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
VDDP
power supply voltage
on pin VDDP
2.5
-
5.5
V
VDDD
digital supply voltage
on pin VDDD
1.65
1.8
1.95
V
IDDP
power supply current
Operating mode with load
fs = 48 kHz
-
1.5
1.7
mA
fs = 32 kHz
-
1.38
-
mA
1.1
1.25
mA
0.1
1
μA
Mute mode
Power-down mode
TFA9882
Product data sheet
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Rev. 2 — 20 April 2011
-
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TFA9882
NXP Semiconductors
3.4 W I2S input mono class-D audio amplifier
Table 14. DC characteristics …continued
All parameters are guaranteed for VDDP = 3.6 V; VDDD = 1.8 V; RL = 4 Ω[1]; LL = 20 μH[1]; fi = 1 kHz; fs = 48 kHz; Tamb = 25 °C,
default slope and gain settings; unless otherwise specified.
Symbol
Parameter
Conditions
IDDD
digital supply current
Operating mode
Min
Typ
Max
Unit
fs = 48 kHz
-
1.25
1.4
mA
fs = 32 kHz
-
0.85
-
mA
-
1.1
1.2
mA
Mute mode
fs = 48 kHz
fs = 32 kHz
Power-down mode
BCK = WS = DATA = 0 V
-
0.8
-
mA
-
2.5
10
μA
-
125
150
mΩ
-
-
3
mV
Series resistance output power switches
RDSon
drain-source on-state resistance
Amplifier output pins; pins OUTA and OUTB
|VO(offset)|
output offset voltage
BCK, DATA, WSL and WSR
VIH
HIGH-level input voltage
0.7VDDD -
3.6
V
VIL
LOW-level input voltage
-
-
0.3VDDD
V
Ci
input capacitance
-
-
3
pF
Protection
Tact(th_prot)
thermal protection activation temperature
130
-
150
°C
VP(ovp)
overvoltage protection supply voltage
5.5
-
6.0
V
VP(uvp)
undervoltage protection supply voltage
2.3
-
2.5
V
IO(ocp)
overcurrent protection output current
1.45
-
-
A
[1]
RL = load resistance; LL = load inductance.
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3.4 W I2S input mono class-D audio amplifier
12.2 AC characteristics
Table 15. AC characteristics
All parameters are guaranteed for VDDP = 3.6 V; VDDD = 1.8 V; RL = 4 Ω[1]; LL = 20 μH[1]; fi = 1 kHz; fs = 48 kHz; Tamb = 25 °C,
default slope and gain settings; unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
VDDP = 3.6 V, fi = 100 Hz
-
1.4
-
W
VDDP = 5.0 V, fi = 100 Hz
-
2.7
-
W
VDDP = 3.6 V, fi = 100 Hz
-
0.75
-
W
VDDP = 5.0 V, fi = 100 Hz
-
1.45
-
W
Output power
Po(RMS)
RMS output power
THD + N = 1 %
THD + N = 1 %; RL = 8 Ω; LL = 44 μH
THD + N = 10 %
VDDP = 3.6 V, fi = 100 Hz
-
1.75
-
W
VDDP = 5.0 V, fi = 100 Hz
-
3.4
-
W
VDDP = 3.6 V, fi = 100 Hz
-
0.95
-
W
VDDP = 5.0 V, fi = 100 Hz
-
1.85
-
W
-
90
-
%
-
0.02
0.1
%
THD + N = 10 %; RL = 8 Ω; LL = 44 μH
Performance
ηpo
output power efficiency
THD+N
total harmonic distortion-plus-noise Po(RMS) = 100 mW
Po(RMS) = 1.4 W
Vn(o)
output noise voltage
A-weighted
-
24
-
μV
S/N
signal-to-noise ratio
VDDP = 5 V; Vo = 3.4 V (RMS); A-weighted
-
103
-
dB
PSRR
power supply rejection ratio
Vripple = 200 mV; fripple = 217 Hz
-
85
-
dB
VoM
peak output voltage
at −6 dBFS (peak) digital input:
gain = −3 dB; VDDP = 2.5 V
-
2.3
-
V
gain = 0 dB; VDDP = 3.6 V
3.1
3.3
3.5
V
gain = +3 dB; VDDP = 5.0 V; RL = 8 Ω
-
4.7
-
V
Power-up, power-down and propagation times
td(on)
turn-on delay time
[2]
-
-
4
ms
td(off)
turn-off delay time
[2]
-
-
5
μs
propagation delay
[2]
-
600
-
μs
tPD
[1]
RL = load resistance; LL = load inductance.
[2]
Inversely proportional to fs.
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Product data sheet
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TFA9882
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3.4 W I2S input mono class-D audio amplifier
12.3 I2S timing characteristics
Table 16. I2S timing characteristics
All parameters are guaranteed for VDDP = 3.6 V; VDDD = 1.8 V; RL = 4 Ω[1]; LL = 20 μH[1]; fi = 1 kHz; fs = 48 kHz; Tamb = 25 °C,
default slope and gain settings; unless otherwise specified.
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
fs
sampling frequency
on pins WSL or WSR
32
-
48
kHz
fclk
clock frequency
on pin BCK
-
64fs
-
Hz
tsu
set-up time
WS edge to BCK HIGH
10
-
-
ns
DATA edge to BCK HIGH
10
-
-
ns
BCK HIGH to WS edge
10
-
-
ns
BCK HIGH to DATA edge
10
-
-
ns
hold time
th
[1]
RL = load resistance; LL = load inductance.
BCK
th
tsu
WS
DATA
010aaa732
Fig 10. I2S timing
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13. Application information
13.1 ElectroMagnetic Compatibility (EMC)
EMC standards define to what degree a (sub)system is susceptible to externally imposed
electromagnetic influences and to what degree a (sub)system is responsible for emitting
electromagnetic signals, when in Standby mode or Operating mode.
EMC immunity and emission values are normally measured over a frequency range from
180 kHz up to 3 GHz.
13.1.1 Immunity
A major reason why amplifier devices pick up high frequency signals, and (after detection)
manifest these in the device's audio band, is the presence of analog circuits inside the
device or in the (sub)system.
The TFA9882 has digital inputs and digital outputs. Comparative tests on a
TFA9882-based (sub)system show that the impact of externally imposed electromagnetic
signals on the device is negligible in both Standby and Operating modes.
13.1.2 Emissions
Since the TFA9882 is a class-D amplifier with digitally switched outputs in a BTL
configuration, it can potentially generate emissions due to the steep edges on the
amplifier outputs. External components can be used to suppress these emissions.
However, the TFA9882 features built-in slope control to suppress such emissions by
reducing the slew rate of the BTL output signals. By reducing the slew rate, the emissions
are reduced by some 10 dB when compared with full-speed operation.
13.2 Supply decoupling and filtering
A ceramic decoupling capacitor of between 4.7 μF and 10 μF should be placed close to
the TFA9882 for decoupling the VDDP supply. This minimizes the size of the
high-frequency current loop, thereby optimizing EMC performance.
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3.4 W I2S input mono class-D audio amplifier
13.3 Typical application diagram (simplified)
DATA
BCK
1.8 V
VDDD
A2
VDDP
WSR
WSL
battery
C2
B2
A1
C1
C3
OUTA
left speaker
4 Ω or 8 Ω
TFA9882UK
B1
A3
OUTB
B3
CVDDD
CVDDP
4.7 μF
GND
BASEBAND
PROCESSOR
100 nF
I2S output
DATA
BCK
1.8 V
VDDD
A2
VDDP
WSR
WSL
battery
C2
B2
A1
C1
C3
OUTA
right speaker
4 Ω or 8 Ω
TFA9882UK
B1
A3
OUTB
B3
GND
CVDDD
100 nF
CVDDP
4.7 μF
010aaa733
Fig 11. Typical stereo application (simplified)
TFA9882
Product data sheet
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3.4 W I2S input mono class-D audio amplifier
13.4 Curves measured in reference design (demonstration board)
All measurements were taken with VDDD = 1.8 V, fclk = 6.144 MHz, clip control off, DPSA
off and slope normal, unless otherwise specified.
001aam634
102
THD+N
(%)
THD+N
(%)
10
10
1
1
10−1
001aam636
102
10−1
(1)
(1)
(3)
10−2
10−2
(2)
(2)
(3)
10−3
10−3
10−2
10−1
1
10
10−3
10−3
10−2
10−1
1
Po (W)
10
Po (W)
(1) fi = 6 kHz.
(1) fi = 6 kHz.
(2) fi = 1 kHz.
(2) fi = 1 kHz.
(3) fi = 100 Hz.
(3) fi = 100 Hz.
a. VDDP = 3.6 V, RL = 8 Ω, LL = 44 μH
b. VDDP = 5 V, RL = 8 Ω, LL = 44 μH
001aam633
102
001aam635
102
THD+N
(%)
THD+N
(%)
10
10
1
1
(1)
10−1
10−1
(1)
(3)
10−3
10−3
(3)
(2)
10−2
10−2
10−2
10−1
1
10
10−3
10−3
(2)
10−2
Po (W)
1
10
Po (W)
(1) fi = 6 kHz.
(1) fi = 6 kHz.
(2) fi = 1 kHz.
(2) fi = 1 kHz.
(3) fi = 100 Hz.
(3) fi = 100 Hz.
c. VDDP = 3.6 V, RL = 4 Ω, LL = 20 μH
10−1
d. VDDP = 5 V, RL = 4 Ω, LL = 20 μH
Fig 12. THD+N as a function of output power
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TFA9882
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3.4 W I2S input mono class-D audio amplifier
001aam638
10
001aam640
10
THD+N
(%)
THD+N
(%)
1
1
10−1
10−1
(1)
10−2
(1)
10−2
(2)
10−3
10
102
103
104
105
(2)
10−3
10
102
103
104
105
fi (Hz)
fi (Hz)
(1) Po = 500 mW
(1) Po = 500 mW
(2) Po = 100 mW
(2) Po = 100 mW
a. VDDP = 3.6 V, RL = 8 Ω, LL = 44 μH
b. VDDP = 5 V, RL = 8 Ω, LL = 44 μH
001aam637
10
001aam639
10
THD+N
(%)
THD+N
(%)
1
1
10−1
10−1
(1)
(1)
(2)
10−2
10−3
10
102
(2)
10−2
103
104
105
10−3
10
102
103
104
fi (Hz)
(1) Po = 1W
(1) Po = 1W
(2) Po = 100 mW
(2) Po = 100 mW
c. VDDP = 3.6 V, RL = 4 Ω, LL = 20 μH
105
fi (Hz)
d. VDDP = 5 V, RL = 4 Ω, LL = 20 μH
Fig 13. THD+N as a function of frequency
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3.4 W I2S input mono class-D audio amplifier
001aam641
10
001aam642
10
THD+N+IMD
(%)
THD+N+IMD
(%)
1
1
10−1
10−1
(4)
(4)
(3)
(2)
(1)
10−2
10−3
10
102
103
104
(3)
(2)
(1)
10−2
105
10−3
10
102
103
fi (Hz)
104
105
fi (Hz)
(1) Vripple = 0 V (fripple = 0 Hz)
(1) Vripple = 0 V (fripple = 0 Hz)
(2) fripple = 217 Hz
(2) fripple = 217 Hz
(3) fripple = 1 kHz
(3) fripple = 1 kHz
(4) fripple = 6 kHz
(4) fripple = 6 kHz
a. VDDP = 3.6 V, RL = 4 Ω, LL = 20 μH, Po = 100 mW
Vripple = 200 mV (RMS)
b. VDDP = 5 V, RL = 4 Ω, LL = 20 μH, Po = 100 mW
Vripple = 200 mV (RMS)
Fig 14. THD+N + power supply intermodulation distortion as a function of frequency
001aan660
4
PSRR
(dB)
(1)
G
(dB)
001aam644
−10
−30
2
−50
(2)
0
−70
(1)
-2
−90
(3)
-4
10
102
103
104
105
−110
(2)
10
102
fi (Hz)
(1) gain = +3 dB
(1) VDDP = 3.6 V
(2) gain = 0 dB
(2) VDDP = 5 V
(3) gain = −3 dB
103
105
104
fripple (Hz)
RL = 4 Ω, LL = 20 μH, Vripple = 200 mV (RMS)
VDDP = 3.6 V, RL = 4 Ω, LL = 20 μH, Po = 500 mW
Fig 15. Normalized gain as a function of frequency
TFA9882
Product data sheet
Fig 16. PSRR as a function of ripple frequency
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001aam632
110
S/N ratio
(dB)
90
(1)
70
(2)
50
30
10
10−3
10−2
10−1
1
10
Po (W)
(1) A-weighted
(2) 20 kHz brickwall filter
VDDP = 5 V, RL = 4 Ω, LL = 20 μH, reference signal: 3.4 V (RMS)
Fig 17. S/N ratio as a function of output power
001aam649
5
Po
(W)
Po
(W)
(1)
4
001aam650
4
(1)
3
(2)
(2)
3
2
(3)
2
(3)
(4)
(4)
1
1
0
0
2
3
4
5
6
2
3
4
VDDP (V)
5
6
VDDP (V)
(1) THD+N = 10 %, RL = 4 Ω, LL = 20 μH
(1) THD+N = 10 %, RL = 4 Ω, LL = 20 μH
(2) THD+N = 1 %, RL = 4 Ω, LL = 20 μH
(2) THD+N = 1 %, RL = 4 Ω, LL = 20 μH
(3) THD+N = 10 %, RL = 8 Ω, LL = 44 μH
(3) THD+N = 10 %, RL = 8 Ω, LL = 44 μH
(4) THD+N = 1 %, RL = 8 Ω, LL = 44 μH
(4) THD+N = 1 %, RL = 8 Ω, LL = 44 μH
a. fi = 100 Hz, clip control off
b. fi = 100 Hz, clip control on
Fig 18. Output power as a function of supply voltage
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3.4 W I2S input mono class-D audio amplifier
001aam647
0.15
001aam645
0.4
P
(W)
P
(W)
(2)
(2)
0.3
0.10
0.2
(1)
(1)
0.05
0.1
0
10−3
10−2
10−1
1
0
10−3
10
10−2
10−1
1
10
Po (W)
Po (W)
(1) VDDP = 3.6 V
(1) VDDP = 3.6 V
(2) VDDP = 5 V
(2) VDDP = 5 V
a. RL = 8 Ω, LL = 44 μH, fi = 1 kHz, DPSA on
b. RL = 4 Ω, LL = 20 μH, fi = 1 kHz, DPSA on
Fig 19. Power dissipation as a function of output power
001aam648
100
(1)
η
(%)
001aam646
100
(2)
80
80
60
60
40
40
20
20
0
(2)
(1)
η
(%)
0
0
0.5
1.0
1.5
2.0
0
0.5
1.0
Po (W)
1.5
2.0
2.5
3.0
3.5
Po (W)
(1) VDDP = 3.6 V
(1) VDDP = 3.6 V
(2) VDDP = 5 V
(2) VDDP = 5 V
a. RL = 8 Ω, LL = 44 μH, fi = 1 kHz, DPSA on
b. RL = 4 Ω, LL = 20 μH, fi = 1 kHz, DPSA on
Fig 20. Efficiency as a function of output power
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14. Package outline
WLCSP9: wafer level chip-size package; 9 bumps; body 1.49 x 1.27 mm
A
B
D
TFA9882UK
bump A1
index area
A2
A
E
A1
detail X
ZD1
ZD2
e1
e
Øv
Øw
b
C
C A B
C
y
C
e
e1
B
A
bump A1
index area
1
2
3
X
0
0.5
Dimensions
Unit
mm
max
nom
min
1 mm
scale
A
0.6
A1
A2
b
D
E
e
0.22 0.38 0.28 1.521 1.301
0.20 0.36 0.26 1.491 1.271 0.4
0.18 0.34 0.24 1.461 1.241
e1
e2
0.8
0.8
v
w
y
ZD1
ZD2
ZE
0.465 0.285 0.265
0.015 0.04 0.02 0.435 0.255 0.235
0.405 0.225 0.205
tfa9882uk_po
Outline
version
References
IEC
JEDEC
JEITA
European
projection
Issue date
11-02-01
11-02-10
TFA9882UK
Fig 21. Package outline TFA9882UK (WLCSP9)
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15. Soldering of WLCSP packages
15.1 Introduction to soldering WLCSP packages
This text provides a very brief insight into a complex technology. A more in-depth account
of soldering WLCSP (Wafer Level Chip-Size Packages) can be found in application note
AN10439 “Wafer Level Chip Scale Package” and in application note AN10365 “Surface
mount reflow soldering description”.
Wave soldering is not suitable for this package.
All NXP WLCSP packages are lead-free.
15.2 Board mounting
Board mounting of a WLCSP requires several steps:
1. Solder paste printing on the PCB
2. Component placement with a pick and place machine
3. The reflow soldering itself
15.3 Reflow soldering
Key characteristics in reflow soldering are:
• Lead-free versus SnPb soldering; note that a lead-free reflow process usually leads to
higher minimum peak temperatures (see Figure 22) than a PbSn process, thus
reducing the process window
• Solder paste printing issues, such as smearing, release, and adjusting the process
window for a mix of large and small components on one board
• Reflow temperature profile; this profile includes preheat, reflow (in which the board is
heated to the peak temperature), and cooling down. It is imperative that the peak
temperature is high enough for the solder to make reliable solder joints (a solder paste
characteristic) while being low enough that the packages and/or boards are not
damaged. The peak temperature of the package depends on package thickness and
volume and is classified in accordance with Table 17.
Table 17.
Lead-free process (from J-STD-020C)
Package thickness (mm)
Package reflow temperature (°C)
Volume (mm3)
< 350
350 to 2000
> 2000
< 1.6
260
260
260
1.6 to 2.5
260
250
245
> 2.5
250
245
245
Moisture sensitivity precautions, as indicated on the packing, must be respected at all
times.
Studies have shown that small packages reach higher temperatures during reflow
soldering, see Figure 22.
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3.4 W I2S input mono class-D audio amplifier
maximum peak temperature
= MSL limit, damage level
temperature
minimum peak temperature
= minimum soldering temperature
peak
temperature
time
001aac844
MSL: Moisture Sensitivity Level
Fig 22. Temperature profiles for large and small components
For further information on temperature profiles, refer to application note AN10365
“Surface mount reflow soldering description”.
15.3.1 Stand off
The stand off between the substrate and the chip is determined by:
• The amount of printed solder on the substrate
• The size of the solder land on the substrate
• The bump height on the chip
The higher the stand off, the better the stresses are released due to TEC (Thermal
Expansion Coefficient) differences between substrate and chip.
15.3.2 Quality of solder joint
A flip-chip joint is considered to be a good joint when the entire solder land has been
wetted by the solder from the bump. The surface of the joint should be smooth and the
shape symmetrical. The soldered joints on a chip should be uniform. Voids in the bumps
after reflow can occur during the reflow process in bumps with high ratio of bump diameter
to bump height, i.e. low bumps with large diameter. No failures have been found to be
related to these voids. Solder joint inspection after reflow can be done with X-ray to
monitor defects such as bridging, open circuits and voids.
15.3.3 Rework
In general, rework is not recommended. By rework we mean the process of removing the
chip from the substrate and replacing it with a new chip. If a chip is removed from the
substrate, most solder balls of the chip will be damaged. In that case it is recommended
not to re-use the chip again.
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TFA9882
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3.4 W I2S input mono class-D audio amplifier
Device removal can be done when the substrate is heated until it is certain that all solder
joints are molten. The chip can then be carefully removed from the substrate without
damaging the tracks and solder lands on the substrate. Removing the device must be
done using plastic tweezers, because metal tweezers can damage the silicon. The
surface of the substrate should be carefully cleaned and all solder and flux residues
and/or underfill removed. When a new chip is placed on the substrate, use the flux
process instead of solder on the solder lands. Apply flux on the bumps at the chip side as
well as on the solder pads on the substrate. Place and align the new chip while viewing
with a microscope. To reflow the solder, use the solder profile shown in application note
AN10365 “Surface mount reflow soldering description”.
15.3.4 Cleaning
Cleaning can be done after reflow soldering.
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16. Revision history
Table 18.
Revision history
Document ID
Release date
Data sheet status
TFA9882 v.2
20110420
Product data sheet
Modifications:
TFA9882 v.1
TFA9882
Product data sheet
•
Change notice
Supersedes
TFA9882 v.1
Data sheet status changed to ‘Product data sheet’
20110331
Preliminary data sheet
-
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-
© NXP B.V. 2011. All rights reserved.
28 of 31
TFA9882
NXP Semiconductors
3.4 W I2S input mono class-D audio amplifier
17. Legal information
17.1 Data sheet status
Document status[1][2]
Product status[3]
Definition
Objective [short] data sheet
Development
This document contains data from the objective specification for product development.
Preliminary [short] data sheet
Qualification
This document contains data from the preliminary specification.
Product [short] data sheet
Production
This document contains the product specification.
[1]
Please consult the most recently issued document before initiating or completing a design.
[2]
The term ‘short data sheet’ is explained in section “Definitions”.
[3]
The product status of device(s) described in this document may have changed since this document was published and may differ in case of multiple devices. The latest product status
information is available on the Internet at URL http://www.nxp.com.
17.2 Definitions
Draft — The document is a draft version only. The content is still under
internal review and subject to formal approval, which may result in
modifications or additions. NXP Semiconductors does not give any
representations or warranties as to the accuracy or completeness of
information included herein and shall have no liability for the consequences of
use of such information.
Short data sheet — A short data sheet is an extract from a full data sheet
with the same product type number(s) and title. A short data sheet is intended
for quick reference only and should not be relied upon to contain detailed and
full information. For detailed and full information see the relevant full data
sheet, which is available on request via the local NXP Semiconductors sales
office. In case of any inconsistency or conflict with the short data sheet, the
full data sheet shall prevail.
Product specification — The information and data provided in a Product
data sheet shall define the specification of the product as agreed between
NXP Semiconductors and its customer, unless NXP Semiconductors and
customer have explicitly agreed otherwise in writing. In no event however,
shall an agreement be valid in which the NXP Semiconductors product is
deemed to offer functions and qualities beyond those described in the
Product data sheet.
17.3 Disclaimers
Limited warranty and liability — Information in this document is believed to
be accurate and reliable. However, NXP Semiconductors does not give any
representations or warranties, expressed or implied, as to the accuracy or
completeness of such information and shall have no liability for the
consequences of use of such information.
In no event shall NXP Semiconductors be liable for any indirect, incidental,
punitive, special or consequential damages (including - without limitation - lost
profits, lost savings, business interruption, costs related to the removal or
replacement of any products or rework charges) whether or not such
damages are based on tort (including negligence), warranty, breach of
contract or any other legal theory.
Notwithstanding any damages that customer might incur for any reason
whatsoever, NXP Semiconductors’ aggregate and cumulative liability towards
customer for the products described herein shall be limited in accordance
with the Terms and conditions of commercial sale of NXP Semiconductors.
malfunction of an NXP Semiconductors product can reasonably be expected
to result in personal injury, death or severe property or environmental
damage. NXP Semiconductors accepts no liability for inclusion and/or use of
NXP Semiconductors products in such equipment or applications and
therefore such inclusion and/or use is at the customer’s own risk.
Applications — Applications that are described herein for any of these
products are for illustrative purposes only. NXP Semiconductors makes no
representation or warranty that such applications will be suitable for the
specified use without further testing or modification.
Customers are responsible for the design and operation of their applications
and products using NXP Semiconductors products, and NXP Semiconductors
accepts no liability for any assistance with applications or customer product
design. It is customer’s sole responsibility to determine whether the NXP
Semiconductors product is suitable and fit for the customer’s applications and
products planned, as well as for the planned application and use of
customer’s third party customer(s). Customers should provide appropriate
design and operating safeguards to minimize the risks associated with their
applications and products.
NXP Semiconductors does not accept any liability related to any default,
damage, costs or problem which is based on any weakness or default in the
customer’s applications or products, or the application or use by customer’s
third party customer(s). Customer is responsible for doing all necessary
testing for the customer’s applications and products using NXP
Semiconductors products in order to avoid a default of the applications and
the products or of the application or use by customer’s third party
customer(s). NXP does not accept any liability in this respect.
Limiting values — Stress above one or more limiting values (as defined in
the Absolute Maximum Ratings System of IEC 60134) will cause permanent
damage to the device. Limiting values are stress ratings only and (proper)
operation of the device at these or any other conditions above those given in
the Recommended operating conditions section (if present) or the
Characteristics sections of this document is not warranted. Constant or
repeated exposure to limiting values will permanently and irreversibly affect
the quality and reliability of the device.
Terms and conditions of commercial sale — NXP Semiconductors
products are sold subject to the general terms and conditions of commercial
sale, as published at http://www.nxp.com/profile/terms, unless otherwise
agreed in a valid written individual agreement. In case an individual
agreement is concluded only the terms and conditions of the respective
agreement shall apply. NXP Semiconductors hereby expressly objects to
applying the customer’s general terms and conditions with regard to the
purchase of NXP Semiconductors products by customer.
Right to make changes — NXP Semiconductors reserves the right to make
changes to information published in this document, including without
limitation specifications and product descriptions, at any time and without
notice. This document supersedes and replaces all information supplied prior
to the publication hereof.
No offer to sell or license — Nothing in this document may be interpreted or
construed as an offer to sell products that is open for acceptance or the grant,
conveyance or implication of any license under any copyrights, patents or
other industrial or intellectual property rights.
Suitability for use — NXP Semiconductors products are not designed,
authorized or warranted to be suitable for use in life support, life-critical or
safety-critical systems or equipment, nor in applications where failure or
Export control — This document as well as the item(s) described herein
may be subject to export control regulations. Export might require a prior
authorization from national authorities.
TFA9882
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 20 April 2011
© NXP B.V. 2011. All rights reserved.
29 of 31
TFA9882
NXP Semiconductors
3.4 W I2S input mono class-D audio amplifier
Quick reference data — The Quick reference data is an extract of the
product data given in the Limiting values and Characteristics sections of this
document, and as such is not complete, exhaustive or legally binding.
Non-automotive qualified products — Unless this data sheet expressly
states that this specific NXP Semiconductors product is automotive qualified,
the product is not suitable for automotive use. It is neither qualified nor tested
in accordance with automotive testing or application requirements. NXP
Semiconductors accepts no liability for inclusion and/or use of
non-automotive qualified products in automotive equipment or applications.
In the event that customer uses the product for design-in and use in
automotive applications to automotive specifications and standards, customer
(a) shall use the product without NXP Semiconductors’ warranty of the
product for such automotive applications, use and specifications, and (b)
whenever customer uses the product for automotive applications beyond
NXP Semiconductors’ specifications such use shall be solely at customer’s
own risk, and (c) customer fully indemnifies NXP Semiconductors for any
liability, damages or failed product claims resulting from customer design and
use of the product for automotive applications beyond NXP Semiconductors’
standard warranty and NXP Semiconductors’ product specifications.
17.4 Trademarks
Notice: All referenced brands, product names, service names and trademarks
are the property of their respective owners.
18. Contact information
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: [email protected]
TFA9882
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 20 April 2011
© NXP B.V. 2011. All rights reserved.
30 of 31
TFA9882
NXP Semiconductors
3.4 W I2S input mono class-D audio amplifier
19. Contents
1
2
3
4
5
6
7
7.1
7.2
8
8.1
8.2
8.3
8.4
8.4.1
8.4.2
8.4.3
8.4.4
8.4.5
8.5
8.6
8.7
8.8
8.8.1
8.8.2
8.8.3
9
10
11
12
12.1
12.2
12.3
13
13.1
13.1.1
13.1.2
13.2
13.3
13.4
14
15
15.1
General description . . . . . . . . . . . . . . . . . . . . . . 1
Features and benefits . . . . . . . . . . . . . . . . . . . . 1
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Quick reference data . . . . . . . . . . . . . . . . . . . . . 2
Ordering information . . . . . . . . . . . . . . . . . . . . . 3
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pinning information . . . . . . . . . . . . . . . . . . . . . . 4
Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 4
Functional description . . . . . . . . . . . . . . . . . . . 5
Mode selection and interfacing . . . . . . . . . . . . . 5
I2S format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Power-up/power-down sequence . . . . . . . . . . . 6
Control settings. . . . . . . . . . . . . . . . . . . . . . . . . 7
Control setting pattern recognition . . . . . . . . . . 7
Clip control . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Gain selection . . . . . . . . . . . . . . . . . . . . . . . . . . 8
PWM slope selection . . . . . . . . . . . . . . . . . . . . 8
Dynamic Power Stage Activation (DPSA). . . . . 8
High-pass filter . . . . . . . . . . . . . . . . . . . . . . . . . 9
PWM frequency . . . . . . . . . . . . . . . . . . . . . . . . 9
Bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Protection mechanisms . . . . . . . . . . . . . . . . . 10
OverTemperature Protection (OTP) . . . . . . . . 10
Supply voltage protection mechanisms
(UVP and OVP) . . . . . . . . . . . . . . . . . . . . . . . 11
OverCurrent Protection (OCP) . . . . . . . . . . . . 11
Internal circuitry. . . . . . . . . . . . . . . . . . . . . . . . 12
Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . 12
Thermal characteristics . . . . . . . . . . . . . . . . . 13
Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . 13
DC characteristics . . . . . . . . . . . . . . . . . . . . . 13
AC characteristics. . . . . . . . . . . . . . . . . . . . . . 15
I2S timing characteristics . . . . . . . . . . . . . . . . 16
Application information. . . . . . . . . . . . . . . . . . 17
ElectroMagnetic Compatibility (EMC) . . . . . . . 17
Immunity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Emissions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Supply decoupling and filtering. . . . . . . . . . . . 17
Typical application diagram (simplified) . . . . . 18
Curves measured in reference design
(demonstration board) . . . . . . . . . . . . . . . . . . 19
Package outline . . . . . . . . . . . . . . . . . . . . . . . . 24
Soldering of WLCSP packages. . . . . . . . . . . . 25
Introduction to soldering WLCSP packages . . 25
15.2
Board mounting . . . . . . . . . . . . . . . . . . . . . . .
15.3
Reflow soldering . . . . . . . . . . . . . . . . . . . . . .
15.3.1
Stand off . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
15.3.2
Quality of solder joint . . . . . . . . . . . . . . . . . . .
15.3.3
Rework. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
15.3.4
Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16
Revision history . . . . . . . . . . . . . . . . . . . . . . .
17
Legal information . . . . . . . . . . . . . . . . . . . . . .
17.1
Data sheet status . . . . . . . . . . . . . . . . . . . . . .
17.2
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . .
17.3
Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . .
17.4
Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . .
18
Contact information . . . . . . . . . . . . . . . . . . . .
19
Contents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
25
25
26
26
26
27
28
29
29
29
29
30
30
31
Please be aware that important notices concerning this document and the product(s)
described herein, have been included in section ‘Legal information’.
© NXP B.V. 2011.
All rights reserved.
For more information, please visit: http://www.nxp.com
For sales office addresses, please send an email to: [email protected]
Date of release: 20 April 2011
Document identifier: TFA9882
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