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TFA9815
Stereo full-bridge audio amplifier 2 x 17 W
Rev. 01 -- 16 December 2008 Preliminary data sheet
1. General description
The TFA9815 is a 2-channel power comparator for high-efficiency class D audio amplifier systems. It contains two full-bridge Bridge-Tied Load (BTL) power stages, drive logic, protection control logic and full differential input comparators. By using this power comparator a compact closed-loop self-oscillating digital audio amplifier system or open-loop system can be built. The continuous output power is 2 x17 W in a full-bridge BTL application. The TFA9815 does not require a heat sink and operates using an asymmetrical supply voltage.
2. Features
I I I I I I Stereo full-bridge audio amplifier for class D applications No external heat sink required Operating voltage range: asymmetrical from 8 V to 20 V Thermally protected Zero dead-time switching Current-limiting (no audible interruptions)
3. Applications
I I I I I I Self-oscillating or open-loop class D audio amplifier applications Flat-panel television sets Flat-panel monitors Multimedia systems Wireless speakers High-end CRT television sets
4. Quick reference data
Table 1. Quick reference data VP = 12 V; fosc = 550 kHz; Tamb = 25 C; typical application diagram Figure 12, unless otherwise specified. Symbol General VP IP supply voltage supply current single, asymmetrical supply (VDD - VSS) Sleep mode 8 12 110 20 200 V A Parameter Conditions Min Typ Max Unit
NXP Semiconductors
TFA9815
Audio amplifier 2 x 17 W
Table 1. Quick reference data ...continued VP = 12 V; fosc = 550 kHz; Tamb = 25 C; typical application diagram Figure 12, unless otherwise specified. Symbol Iq(tot) Parameter total quiescent current output power efficiency RMS output power Conditions Operating mode; no load; no snubbers; no filter connected output power; 2 x 10 W into 8 VP = 15 V; RL = 8 ; THD = 10 % VP = 12 V; RL = 8 ; THD = 10 % VP = 12 V; RL = 6 ; THD = 10 % VP = 12 V; RL = 4 ; THD = 10 % Min Typ 40 Max 50 Unit mA
po Po(RMS)
89 15 9 12 17
91 16 10 13 18
-
% W W W W
5. Ordering information
Table 2. Ordering information Package Name TFA9815T SO32 Description plastic small outline package; 32 leads; body width 7.5 mm Version SOT287-1 Type number
TFA9815_1
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Preliminary data sheet
Rev. 01 -- 16 December 2008
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NXP Semiconductors
TFA9815
Audio amplifier 2 x 17 W
6. Block diagram
TFA9815
27 25 DRIVER HIGH CONTROL LOGIC DRIVER LOW COMPARATOR 1
BOOT1P VDDP1
26 OUT1P
VDDA1 4 IN1P 2 IN1N 3 VSSA1 5
30 VSSP1 29 BOOT1N VDDP1
STAB1
DIAG 10 PROTECTION OVP UVP OCP OTP ODP WP CDELAY 8 SO/OL 6 TEST 11 ENABLE 7 STAB1 REFERENCE STAB2 CONTROL LOGIC CONTROL LOGIC
DRIVER HIGH 28 OUT1N DRIVER LOW
VSSP1 31 STAB1
22 BOOT2P MANAGER DRIVER HIGH 23 OUT2P DRIVER LOW 24 VDDP2
VDDA2 13 IN2P 15 IN2N 14 VSSA2 12 COMPARATOR 2
19 VSSP2 20 BOOT2N VDDP2
STAB2
DRIVER HIGH CONTROL LOGIC DRIVER LOW 21 OUT2N
VSSP2 18 STAB2
HEATSPREADER 1 16 17 32 9 n.c.
010aaa211
VSSD(HW)
Fig 1.
TFA9815 block diagram
TFA9815_1
(c) NXP B.V. 2008. All rights reserved.
Preliminary data sheet
Rev. 01 -- 16 December 2008
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NXP Semiconductors
TFA9815
Audio amplifier 2 x 17 W
7. Pinning information
7.1 Pinning
VSSD(HW) IN1P IN1N VDDA1 VSSA1 SO/OL ENABLE CDELAY NC
1 2 3 4 5 6 7 8 9
32 VSSD(HW) 31 STAB1 30 VSSP1 29 BOOT1N 28 OUT1N 27 BOOT1P 26 OUT1P 25 VDDP1 24 VDDP2 23 OUT2P 22 BOOT2P 21 OUT2N 20 BOOT2N 19 VSSP2 18 STAB2 17 VSSD(HW)
010aaa212
TFA9815 SO32
DIAG 10 TEST 11 VSSA2 12 VDDA2 13 IN2N 14 IN2P 15 VSSD(HW) 16
Fig 2.
Pin configuration
The SO32 package has four corner leads. These leads (1, 16, 17 and 32) are internally connected to the die pad and must be connected to VSSA. Together with the applied copper area on the PCB these leads determine the ambient temperature, which affects the thermal resistance of the junction.
7.2 Pin description
Table 3. Symbol VSSD(HW) IN1P IN1N VDDA1 VSSA1 SO/OL ENABLE CDELAY n.c. DIAG TEST VSSA2 VDDA2 IN2N
TFA9815_1
Pin description Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Description negative digital supply voltage and handle-wafer connection positive input comparator channel 1 negative input comparator channel 1 positive analog supply voltage channel 1 negative analog supply voltage channel 1 self-oscillating / open-loop configuration enable enable input to switch between Sleep and Operating mode switch on/off timing control not connected diagnostic output; open-drain test signal input; for testing purposes only negative analog supply voltage channel 2 positive analog supply voltage channel 2 negative input comparator channel 2
(c) NXP B.V. 2008. All rights reserved.
Preliminary data sheet
Rev. 01 -- 16 December 2008
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NXP Semiconductors
TFA9815
Audio amplifier 2 x 17 W
Pin description ...continued Pin 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 Description positive input comparator channel 2 negative digital supply voltage and handle-wafer connection negative digital supply voltage and handle-wafer connection decoupling of internal 11 V regulator for channel 2 drivers negative power supply voltage channel 2 bootstrap high-side driver negative output channel 2 negative output channel 2 bootstrap high-side driver positive output channel 2 positive output channel 2 positive power supply voltage channel 2 positive power supply voltage channel 1 positive output channel 1 bootstrap high-side driver positive output channel 1 negative output channel 1 bootstrap high-side driver negative output channel 1 negative power supply voltage channel 1 decoupling of internal 11 V regulator for channel 1 drivers negative digital supply voltage and handle-wafer connection
Table 3. Symbol IN2P VSSD(HW) VSSD(HW) STAB2 VSSP2 BOOT2N OUT2N BOOT2P OUT2P VDDP2 VDDP1 OUT1P BOOT1P OUT1N BOOT1N VSSP1 STAB1 VSSD(HW)
8. Functional description
8.1 General
The TFA9815 is a dual-switching power comparator. It is the main building block for a stereo high-efficiency Class D audio power amplifier system. It contains two full-bridge BTL power stages, drive logic, protection control logic and full differential input comparators and references (see Figure 1). By using this power comparator a compact closed-loop self-oscillating digital amplifier system or open-loop system can be built. A second-order low-pass filter converts the PWM output signal into an analog audio signal across the speaker.
8.2 Interfacing
The pins ENABLE and SO/OL control the Operating mode of the TFA9815. Both the ENABLE and the SO/OL pins are referenced to VSSD(HW). When the SO/OL pin is connected to VSSD(HW) the TFA9815 is in self-oscillating configuration: when the SO/OL pin is floating the TFA9815 is in open-loop configuration. Under this latter condition the open-pin voltage is typically 4 V applied internally. The TEST pin needs to be connected to ground in both situations.
TFA9815_1
(c) NXP B.V. 2008. All rights reserved.
Preliminary data sheet
Rev. 01 -- 16 December 2008
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NXP Semiconductors
TFA9815
Audio amplifier 2 x 17 W
SO/OL connections Configuration Self-oscillating Open-loop
Table 4.
Interfacing SO/OL connected to: VSSD(HW) Open
The device has two modes: Sleep and Operating. In Sleep mode the TFA9815 is not biased and has a very low supply current. Sleep mode can also be used to quickly mute the device. When the TFA9815 is set into Operating mode the device is started via the start-up sequence, which provides a pop-free start-up behavior. After start-up the STABn reference voltages are present and the outputs start switching.
Table 5. Start-up Mode Sleep mode Operating mode
Interfacing ENABLE (V) ENABLE < 0.8 V ENABLE > 3 V
8.3 Input comparators
The input stages have a differential input and are optimized for low noise and offset. This results in maximum flexibility in the application. Operating in self-oscillating configuration the inputs (IN1P, IN1N, IN2P, IN2N) of the comparators are internally set to a voltage level of V , but only during the start-up P sequence. In Operating mode the inputs are high-ohmic. Operating in open-loop configuration, no internal voltages are applied to the inputs. The input pins (IN1P, IN1N, IN2P, IN2N) are pulled down to VSSA1 and VSSA2 level by internal resistors.
8.4 Diagnostic
The DIAG output is an open-drain output. The maximum current is 2 mA. When one of the protections is activated the DIAG output is set LOW. The DIAG output refers to VSSD.
Protection Active
t DIAG High Amplifier restart LOW 5 s t
010aaa377
Fig 3.
TFA9815_1
Timing diagram
(c) NXP B.V. 2008. All rights reserved.
Preliminary data sheet
Rev. 01 -- 16 December 2008
6 of 26
NXP Semiconductors
TFA9815
Audio amplifier 2 x 17 W
8.5 Protections
The TFA9815 has the following protections:
* * * * * *
OverTemperature Protection (OTP) OverCurrent Protection (OCP) OverVoltage Protection (OVP) UnderVoltage Protection (UVP) OverDissipation Protection (ODP) Window Protection (WP)
When either the OTP or the OCP are activated the output power stage is switched off and all the outputs (OUT1N, OUT1P, OUT2N and OUT2P) become floating. The power stage will switch back on after 5 s or as soon as the fault condition is removed. When any other protection is activated (OVP, UVP, ODP, or WP) all the outputs become floating and the device shuts down. The TFA9815 will resume operating after the fault condition has been removed, going through the restart sequence shown in Figure 3. Restarting will typically take 500 ms, depending on the power-supply voltage level.
* Overtemperature protection
If the junction temperature (Tj) exceeds a threshold level of about 150 C the outputs become floating. The device will start switching again after 5 ms and when the temperature is below 150 C. This thermal limitation is without audible interruptions.
* Overcurrent protection
If the output current exceeds the maximum output-current threshold level the outputs become floating. The device will start switching again after 5 s. This current limitation is without audible interruptions.
* Overvoltage protection
If the supply voltage applied to the TFA9815 exceeds the maximum supply-voltage threshold level the device shuts down. The device will resume operating when the supply is within the operating range, going through the restart sequence.
* Undervoltage protection
If the supply voltage applied to the TFA9815 falls below the minimum supply-voltage threshold level the device shuts down. The device will resume operating when the supply is within the operating range, going through the restart sequence.
* Overdissipation protection
If the junction temperature (Tj) exceeds 135 C an internal OverTemperature Warning (OTW) signal is generated. If the overcurrent protection is generated while the OTW is active the device will shut down and resume operating automatically, going through the restart sequence.
* Window protection
During start-up, if one of the outputs is shorted to VSS or VDD the device will interrupt the start-up sequence and wait until the short is removed. This is an effective measure to protect the device against shorts between the outputs (before the filter) and the ground or supply lines. The WP protects the device against errors made during board assembly.
TFA9815_1 (c) NXP B.V. 2008. All rights reserved.
Preliminary data sheet
Rev. 01 -- 16 December 2008
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NXP Semiconductors
TFA9815
Audio amplifier 2 x 17 W
Table 6. Symbol OTP OCP OVP UVP ODP WP
Overview protections Condition Tj > 150 C IO > IORM VP > 20 V VP < 8 V Tj > 135 C and IO > IORM OUTX > VDDA - 1 V or OUTX < VSSA + 1 V Diag. LOW LOW LOW LOW LOW LOW Outputs Floating Floating Floating Floating Floating Recovering Automatic, after 5 s and Tj < 150 C Automatic, after 5 s Switch-off to restart when VP < 20 V Switch-off to restart when VP > 8 V Switch-off to restart Start-up after removing fault condition
Protections
8.6 Timing diagram
VP
ENABLE
STAB1
CDELAY
V IN x FLOATING PWM OUT x FLOATING PWM
AUDIO AUDIO DIAG
AUDIO
SLEEP
START-UP
OPERATING
FAULT
RESTART
OPERATING
SHUT-DOWN
SLEEP
010aaa378
Fig 4.
Start-up sequence
TFA9815_1
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Preliminary data sheet
Rev. 01 -- 16 December 2008
8 of 26
NXP Semiconductors
TFA9815
Audio amplifier 2 x 17 W
9. Internal circuitry
Table 7. Pin 1 16 17 32 Internal circuitry Symbol VSSD(HW) VSSD(HW) VSSD(HW) VSSD(HW)
22 V
Equivalent circuit
1,16, 17, 32 VDDA
VSSA
010aaa384
2 3 14 15
IN1P IN1N IN2N IN2P
hvp VSSA 2, 14
135 k 5.5 V
VDDA1, VDDA2
135 k
5.5 V
3, 15
VSSA1, VSSA2
010aaa385
4 5 12 13
VDDA1 VSSA1 VSSA2 VDDA2
5, 13
010aaa386
4, 12
22 V
6
SO/OL
VDDA1 VDDA1
50 A 110 k
6
VSSA1
VSSA
010aaa381
TFA9815_1
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Preliminary data sheet
Rev. 01 -- 16 December 2008
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NXP Semiconductors
TFA9815
Audio amplifier 2 x 17 W
Internal circuitry ...continued Symbol ENABLE
VDDA1
Table 7. Pin 7
Equivalent circuit
3 k
7
250 nA
VSSA
010aaa387
8
CDELAY
VDDA1
2.8 A
8
200 nA 2.8 k
DISCHARGE
VSSA1
010aaa379
10
DIAG
VDDA1
10
VSSA1
VSSD
010aaa030
11
TEST
VDDA1
11
13 k
9V
VSSA1
010aaa031
TFA9815_1
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Preliminary data sheet
Rev. 01 -- 16 December 2008
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NXP Semiconductors
TFA9815
Audio amplifier 2 x 17 W
Internal circuitry ...continued Symbol STAB2 STAB1
VDDA1, VDDA2
50 mA
Table 7. Pin 18 31
Equivalent circuit
18, 31
12 V
VSSD
010aaa445
19 24 25 30
VSSP2 VDDP2 VDDP1 VSSP1
19, 30
010aaa446
24, 25
23.5 V
20 29
BOOT2N BOOT1N
20, 29
12 V
OUT2N, OUT1N
010aaa447
21 23 26 28
OUT2N OUT2P OUT1P OUT1N
21, 23, 26, 28 VDDP1, VDDP2
VSSP1, VSSP2
010aaa380
22 27
BOOT2P BOOT1P
22, 27
12 V
OUT2P
010aaa448
TFA9815_1
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Preliminary data sheet
Rev. 01 -- 16 December 2008
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NXP Semiconductors
TFA9815
Audio amplifier 2 x 17 W
10. Limiting values
Table 8. Limiting values In accordance with the Absolute Maximum Rating System (IEC 60134). Symbol VP IORM Tj Tstg Tamb Pmax Vx Parameter supply voltage repetitive peak output current junction temperature storage temperature ambient temperature maximum power dissipation voltage on pin x Conditions Asymmetrical DIAG IN1P - IN1N IN2P - IN2N all other pins Vesd electrostatic discharge voltage HBM MM
[1] [2]
Min -0.3 3 -55 -40 -
Max +23.1 180 +150 +85 5
Unit V A C C C W V V V V V
VSS - 0.3 12 -6 -6 -2000 -200 +6 +6 +2000 +200
VSS - 0.3 VDD + 0.3 V
[1] [2]
Human-body model (HBM): RS = 1500 ; C = 100 pF; for pins 2, 3, 14, and 15: Vesd = 1500 V. Machine model (MM): RS = 0 ; C = 200 pF; L = 0.75 H.
11. Thermal characteristics
Table 9. Symbol Rth(j-a) Characteristics Parameter thermal resistance from junction to ambient thermal characterization parameter from junction to lead thermal characterization parameter from junction to top of package Conditions JEDEC test board Two-layer application board [3] [1] [2]
Min -
Typ 39 42 -
Max 42 30 8
Unit K/W K/W K/W K/W
j-lead j-top
[1] [2] [3]
Measured in a JEDEC high K-factor test board (standard EIA/JESD 51-7) in free air with natural convection. Two-layer application board (70 mm x 57 mm), 35 m copper, FR4 base material in free air with natural convection. Strongly depends on where the measurement is taken on the package.
TFA9815_1
(c) NXP B.V. 2008. All rights reserved.
Preliminary data sheet
Rev. 01 -- 16 December 2008
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NXP Semiconductors
TFA9815
Audio amplifier 2 x 17 W
12. Characteristics
12.1 Static characteristics
Table 10. Characteristics VP= 12 V;Tamb = 25 C; fosc = 550 kHz; typical application diagram Figure 12, unless otherwise specified. Symbol VP IP Iq(tot) Parameter supply voltage supply current total quiescent current Conditions single asymmetrical supply (VDD - VSS) Sleep mode Operating mode; no load, no snubbers and no filter connected Tj = 25 C Sleep mode Operating mode VI = 5 V self-oscillating configuration open-loop configuration Operating mode 20 Hz < f < 20 kHz [1]
Min 8 -
Typ 12 110 40
Max 20 200 50
Unit V A mA
Supply voltage
Series resistance output power switches RDSon VIL VIH II VIL VIH VO Voffset(i)(eq) Vn(i)(eq) Vi(cm) IIB Tact(th_prot) drain-source on-state resistance ENABLE[1] 3 0 3 10.2 1 4 11 0.8 VP 20 0.4 5 11.7 1 15 V V A V V V mV V LOW-level input voltage HIGH-level input voltage input current SO/OL[1] LOW-level input voltage HIGH-level input voltage output voltage equivalent input offset voltage equivalent input noise voltage common-mode input voltage input bias current thermal protection activation temperature overvoltage protection threshold voltage undervoltage protection supply voltage overcurrent protection output current 150 220 m Enable input: pin
SO/OL input: pin
Stabilizer output pins STAB1 and STAB2 Comparator full-differential input stage
VSSA + 3 150 -
VDDA V -1 1 180 A C
Overtemperature protection
Overvoltage protection Vth(ovp) level internal fixed 20.1 21.5 23 V
Undervoltage protection VP(uvp) level internal fixed 7 7.5 7.9 V
Overcurrent protection IO(ocp) [2]
3
3.5
-
A
TFA9815_1
(c) NXP B.V. 2008. All rights reserved.
Preliminary data sheet
Rev. 01 -- 16 December 2008
13 of 26
NXP Semiconductors
TFA9815
Audio amplifier 2 x 17 W
Table 10. Characteristics ...continued VP= 12 V;Tamb = 25 C; fosc = 550 kHz; typical application diagram Figure 12, unless otherwise specified. Symbol VO Parameter output voltage Conditions HIGH-level LOW-level
[1] [2] Measured with respect to VSSD. Current limiting concept: in overcurrent condition no interruption of the audio signal in case of impedance drop.
Min -
Typ VDDA - 1 VSSA + 1
Max -
Unit V V
Window Protection (WP)
12.2 Dynamic characteristics
Table 11. Switching characteristics VP= 12 V;Tamb = 25 C; fosc = 550 kHz unless otherwise specified. Symbol tr tf tw(min) Parameter rise time fall time minimum pulse width Conditions IO = 0 A IO = 0 A IO = 0 A Min Typ 10 10 60 Max Unit ns ns ns Timing PWM output: pins OUT1 and OUT2
12.3 AC characteristics measured in typical application
Table 12. Po(RMS) AC characteristics measured in typical application Conditions VP = 15 V; RL = 8 ; THD = 10 % VP = 12 V; RL = 8 ; THD = 10 % VP = 12 V; RL = 6 ; THD = 10 % VP = 12 V; RL = 4 ; THD = 10 % THD+N po Gv(cl) Vn(o) S/N SVRR cs
[1] [2]
Symbol Parameter RMS output power
Min 15 9 12 17
[1]
Typ 16 10 13 18 0.05 91 90 19.3 150 96 45 70
Max 0.1 21 -
Unit W W W W % % % dB V dB dB dB
total harmonic distortion-plus-noise output power efficiency closed-loop voltage gain output noise voltage signal-to-noise ratio supply voltage ripple rejection channel separation
Po = 1 W; fi = 1 kHz Po = 2 x 10 W at 8 Po = 2 x 18 W at 4 Vi = 100 mV (RMS); fi = 1 kHz inputs shorted; AES17 brick-wall Vo = 10 V (RMS); Gv(cl) = 20 dB Operating mode; fi = 1 kHz Po = 1 W; fi = 1 kHz
89 88 18.6 94
[2]
34 55
THD+N is measured in a bandwidth of 20 Hz to 20 kHz, AES17, brick-wall. Minimum value determined by R5, R10, R17, R22 equalling +1 % and R7, R14, R18, R20 equalling -1 %.
TFA9815_1
(c) NXP B.V. 2008. All rights reserved.
Preliminary data sheet
Rev. 01 -- 16 December 2008
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NXP Semiconductors
TFA9815
Audio amplifier 2 x 17 W
13. Application information
13.1 Output power estimation
For BTL configuration the output power can be estimated using Equation 1:
2 RL ----------------------------------------------------- x V P R L + 2 x ( R DSon + R S ) = --------------------------------------------------------------------------------2 x RL
P o1%
(1)
Where,
* * * *
VP = supply voltage [V] RL = load impedance [] RDSon = on resistance power switch [] RS = series resistance output inductor []
The output power at 10% THD can be estimated by using Equation 2 (2) Po10% = 1.25 x P o0.5% Figure 5 and Figure 6 below show the estimated output power at THD = 0.5 % and THD = 10 % as a function of the BLT supply voltage for different load impedances.
40 Po (W) 30
010aaa449
2 20 3 1 10
0 8 10 12 14 16 18 VP (V) 20
THD+N = 0.5 % f = 1 kHz (1) 4 (2) 6 (3) 8
Fig 5.
BTL output power as function of supply voltage: THD = 1 %
TFA9815_1
(c) NXP B.V. 2008. All rights reserved.
Preliminary data sheet
Rev. 01 -- 16 December 2008
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NXP Semiconductors
TFA9815
Audio amplifier 2 x 17 W
40 Po (W) 30
010aaa450
20 1 10 2 3 0 8 10 12 14 16 18 VP (V) 20
THD+N = 10 % f = 1 kHz (1) RL = 4 (2) RL = 6 (3) RL = 8
Fig 6.
BTL output power as function of supply voltage: THD = 10 %
13.2 Output current limiting
The maximum peak output current is limited by the level of the overcurrent protection threshold. During normal operation the output current should not exceed this threshold level of 3 A otherwise the OCP will be triggered and the device will stop switching for 5 s. The peak output current in BTL can be estimated using the following equation: VP I O max ----------------------------------------------------- 3 A R L + 2 x ( R DSon + R S ) Where:
* * * *
VP = supply voltage [V] RL = load impedance [] RDSon = on resistance power switch [] RS = series resistance output inductor []
13.3 Speaker configuration and impedance
For a flat-frequency response (second-order Butterworth filter) it is necessary to change the low-pass filter components LLC and CLC according to the speaker configuration and impedance. Table 13 shows the practical required values:
TFA9815_1
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Preliminary data sheet
Rev. 01 -- 16 December 2008
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NXP Semiconductors
TFA9815
Audio amplifier 2 x 17 W
Filter component values Impedance () 4 6 8 LLC (H) 10 15 22 CLC (nF) 1500 1000 680
Table 13. BTL
Configuration
13.4 Differential input
For a high common-mode rejection ratio and a maximum of flexibility in the application, the audio inputs of the application are fully differential. The input configuration for a differential-input application is illustrated in Figure 7.
OUT1P + AUDIO DSP - IN1 + VSS - OUT1N
010aaa382
Fig 7.
Input configuration for a differential input
13.5 Single-ended input
When using an audio source with a single-ended `out', it is important to connect the IN1N from the application board to the VSS of the audio source (e.g. Audio Digital Signal Processing (Audio DSP)). The input configuration for a single-ended `in' application is illustrated in Figure 8.
TFA9815_1
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Preliminary data sheet
Rev. 01 -- 16 December 2008
17 of 26
NXP Semiconductors
TFA9815
Audio amplifier 2 x 17 W
OUT1P
+ AUDIO DSP - VSS OUT1N IN1P IN1N
010aaa383
Fig 8.
Input configuration for a single-ended input
13.6 Curves measured in a typical application
010aaa451
26 Gv (dB) 22
18
14
10 10
102
103
104 fi (Hz)
105
VP = 12 V; RL = 4 ; VI = 300 mV (RMS)
Fig 9.
Gain as a function of frequency
TFA9815_1
(c) NXP B.V. 2008. All rights reserved.
Preliminary data sheet
Rev. 01 -- 16 December 2008
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NXP Semiconductors
TFA9815
Audio amplifier 2 x 17 W
102 THD+N (%) 10
010aaa452
1 1 10-1 2
10-2
10-3 10
102
103
104 fi (Hz)
105
VP = 12 V; RL = 4 (1) Po = 1 W (2) Po = 10 W
Fig 10. Total harmonic distortion + noise as a function of frequency
102 THD+N (%) 10
010aaa453
1 1 10-1 2
10-2
3
10-3 10-2
10-1
1
10 Po (W)
102
VP = 12 V; RL = 4 ; f = 1 kHz (1) 6 kHz (2) 1 kHz (3) 100 Hz
Fig 11. Total harmonic distortion as a function of output power
13.7 Typical application diagram TFA9815
A typical application diagram with the TFA9815 supplied from an asymmetrical supply is shown in Figure 12.
TFA9815_1
(c) NXP B.V. 2008. All rights reserved.
Preliminary data sheet
Rev. 01 -- 16 December 2008
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Preliminary data sheet Rev. 01 -- 16 December 2008
(c) NXP B.V. 2008. All rights reserved. TFA9815_1
NXP Semiconductors
1
VP J1 C32 220 F C33 100 nF
12 V
12 V
R3 10 L1 BEAD C1 220 F C3 100 nF C31 100 nF C4 100 nF C5 100 nF L2 BEAD C2 220 F
12 V
2
SW1
ENABLE
GND OUT1-
GND GND VDDA1 4
R6 10 k C8 220 pF R31 IN1P 10 k C11 47 pF R11 R32 IN1N 10 k
1 2 IN1
J2
C6 1 F
R5 100 k R7 10 k
VDDA2
GND n.c VDDP1 9 25
GND VDDP2 24 26 OUT1P
C9 220 nF
13
OUT1+
L3 22 H
2
2
J3
27
BOOT1P
C7 1 F
R10 GND 10 k
C10 220 pF
R27 10
C27 470 pF
C12 680 nF
3
29
BOOT1N
C14 220 nF R28 10 C28 470 pF
GND
10 k R14 100 k
C13 GND 680 nF
J4
STAB1
C15 4.7 F R35 200 k
28 8 6
OUT1N OUT1-
L4 22 H
1 OUT1
GND
CDELAY SO/OL
OUT1+
31
STAB1
C16 1F
TFA9815
GND OUT2- ENABLE DIAG VDDA2
C18 1 F R17 100 k R18 10 k R19 10 k C21 220 pF C24 220 pF R33 IN2P 10 k C22 68 pF R34 IN2N
GND
7 10 11
18
STAB2
C17 1F
Snubber network (Optional)
OUT2+ 23 OUT2P
GND
L5 22 H
2
J6
1 2 IN2
J5
15
22
BOOT2P
C19 220 nF
R29 10
C29 470 pF
C20 680 nF
20
BOOT2N
C25 220 nF R30 10 C30 470 pF
GND
C26 1 F
C23 GND 680 nF
Audio amplifier 2 x 17 W
R22 GND 10 k
R23
14
10 k R26 100 k 10 k J7
21 12 1 16 17 32 30 19
OUT2N OUT2-
L6 22 H
1 OUT2
TFA9815
5
R100 22
GND OUT2+
VSSA1 VSSA2 VSSD VSSD VSSD VSSDVSSP1 VSSP2 GND
010aaa454
20 of 26
Fig 12. Typical application diagram TFA9815
NXP Semiconductors
TFA9815
Audio amplifier 2 x 17 W
13.8 Typical application: bill of materials
Table 14. Item 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 2 5 2 4 4 4 1 4 1 3 2 2 2 1 1 4 Typical application: bill of materials Part 220 mF/35 V 100 nF/50 V 1 mF/50 V 1 mF/25 V 220 pF/25 V 220 nF/25 V 47 pF/25 V 680 nF/25 V 68 pF/25 V CON2 CINCH Jumper BEAD 200 k / 0.1 W / 5 % 4.7 F / 16 V 22 H 8RDY TOKO A7040HN-220M, 11RHBP TOKO A7503CY-220M or Sagami 7311NA-220M 17 18 5 4 R3 R5, R14, R17, R26. 10 / 0.25 W / 5% 100 k / 0.1 W / 1 % for 20 dB 200 k / 0.1 W / 1 % for 26 dB 19 12 R6, R7, R10, R11, R18, R19, R22, R23, R31, R32, R33, R34. R100 SW1 U1 10 k / 0.1 W / 1 % SMD 0603 SMD 1206 SMD 0603 Footprint CE09-02R SMD 0805 X7R SMD 1206 X7R MKT SMD 0402 NP0 SMD 0805 X7R SMD 0402 NP0 MKT SMD 0402 NP0 2 pins terminal CINCH Closed on demo board only SMD 1206 Wurth Elektronik DC < 0.5 10 MHz > 80 SMD 0603 C1, C2. C3, C4, C5, C31, C33. C16, C17. C6, C7, C18, C26 C8, C10, C21, C24. C9, C14, C19, C25. C11 C12, C13, C20, C23. C22. J1, J3, J6. J2, J5. J4, J7 L1, L2 R35 C15 L3, L4, L5, L6. Quantity Reference
20 21 22
1 1 1
22 / 5 % / 0.1 W SC 1X1 TFA9815T
SMD 0603 Secme 090320901 SOT287-1 (SO32) NXP Semiconductors
Remark: The power supply requires at least a 1000 F capacitor.
TFA9815_1
(c) NXP B.V. 2008. All rights reserved.
Preliminary data sheet
Rev. 01 -- 16 December 2008
21 of 26
NXP Semiconductors
TFA9815
Audio amplifier 2 x 17 W
Snubber network: bill of materials Part Footprint SMD 0805 X7R SMD 1206 C27, C28, C29, C30 470 pF, 25 V R27, R28, R29, R30 10 / 0.25 W / 5%
Table 15. Item 1 2 4 4
Quantity Reference
TFA9815_1
(c) NXP B.V. 2008. All rights reserved.
Preliminary data sheet
Rev. 01 -- 16 December 2008
22 of 26
NXP Semiconductors
TFA9815
Audio amplifier 2 x 17 W
14. Package outline
SO32: plastic small outline package; 32 leads; body width 7.5 mm SOT287-1
D
E
A X
c y HE vM A
Z 32 17
Q A2 A1 pin 1 index Lp 1 e bp 16 wM L detail X (A 3) A
0
5 scale
10 mm
DIMENSIONS (inch dimensions are derived from the original mm dimensions) UNIT mm inches A max. 2.65 0.1 A1 0.3 0.1 A2 2.45 2.25 A3 0.25 0.01 bp 0.49 0.36 0.02 0.01 c 0.27 0.18 0.011 0.007 D (1) 20.7 20.3 0.81 0.80 E (1) 7.6 7.4 0.30 0.29 e 1.27 0.05 HE 10.65 10.00 0.419 0.394 L 1.4 Lp 1.1 0.4 Q 1.2 1.0 0.047 0.039 v 0.25 0.01 w 0.25 0.01 y 0.1 Z (1) 0.95 0.55
0.012 0.096 0.004 0.089
0.043 0.055 0.016
0.037 0.004 0.022
8o o 0
Note 1. Plastic or metal protrusions of 0.15 mm (0.006 inch) maximum per side are not included. OUTLINE VERSION SOT287-1 REFERENCES IEC JEDEC MO-119 JEITA EUROPEAN PROJECTION
ISSUE DATE 00-08-17 03-02-19
Fig 13. Package outline SOT287-1 (SO32)
TFA9815_1 (c) NXP B.V. 2008. All rights reserved.
Preliminary data sheet
Rev. 01 -- 16 December 2008
23 of 26
NXP Semiconductors
TFA9815
Audio amplifier 2 x 17 W
15. Revision history
Table 16. Revision history Release date 20081216 Data sheet status Preliminary data sheet Change notice Supersedes Document ID TFA9815_1
TFA9815_1
(c) NXP B.V. 2008. All rights reserved.
Preliminary data sheet
Rev. 01 -- 16 December 2008
24 of 26
NXP Semiconductors
TFA9815
Audio amplifier 2 x 17 W
16. Legal information
16.1 Data sheet status
Document status[1][2] Objective [short] data sheet Preliminary [short] data sheet Product [short] data sheet
[1] [2] [3]
Product status[3] Development Qualification Production
Definition This document contains data from the objective specification for product development. This document contains data from the preliminary specification. This document contains the product specification.
Please consult the most recently issued document before initiating or completing a design. The term `short data sheet' is explained in section "Definitions". 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.
16.2 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.
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. 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. Limiting values -- Stress above one or more limiting values (as defined in the Absolute Maximum Ratings System of IEC 60134) may cause permanent damage to the device. Limiting values are stress ratings only and operation of the device at these or any other conditions above those given in the Characteristics sections of this document is not implied. Exposure to limiting values for extended periods may affect device reliability. Terms and conditions of 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, including those pertaining to warranty, intellectual property rights infringement and limitation of liability, unless explicitly otherwise agreed to in writing by NXP Semiconductors. In case of any inconsistency or conflict between information in this document and such terms and conditions, the latter will prevail. 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.
16.3 Disclaimers
General -- 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. 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. Suitability for use -- NXP Semiconductors products are not designed, authorized or warranted to be suitable for use in medical, military, aircraft, space or life support equipment, nor in applications where failure or malfunction of an NXP Semiconductors product can reasonably be expected to result in personal injury, death or severe property or environmental
16.4 Trademarks
Notice: All referenced brands, product names, service names and trademarks are the property of their respective owners.
17. Contact information
For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: salesaddresses@nxp.com
TFA9815_1
(c) NXP B.V. 2008. All rights reserved.
Preliminary data sheet
Rev. 01 -- 16 December 2008
25 of 26
NXP Semiconductors
TFA9815
Audio amplifier 2 x 17 W
18. Contents
1 2 3 4 5 6 7 7.1 7.2 8 8.1 8.2 8.3 8.4 8.5 8.6 9 10 11 12 12.1 12.2 12.3 13 13.1 13.2 13.3 13.4 13.5 13.6 13.7 13.8 14 15 16 16.1 16.2 16.3 16.4 17 18 General description . . . . . . . . . . . . . . . . . . . . . . 1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Quick reference data . . . . . . . . . . . . . . . . . . . . . 1 Ordering information . . . . . . . . . . . . . . . . . . . . . 2 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Pinning information . . . . . . . . . . . . . . . . . . . . . . 4 Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 4 Functional description . . . . . . . . . . . . . . . . . . . 5 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Interfacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Input comparators. . . . . . . . . . . . . . . . . . . . . . . 6 Diagnostic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Protections . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . 8 Internal circuitry. . . . . . . . . . . . . . . . . . . . . . . . . 9 Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . 12 Thermal characteristics. . . . . . . . . . . . . . . . . . 12 Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . 13 Static characteristics. . . . . . . . . . . . . . . . . . . . 13 Dynamic characteristics . . . . . . . . . . . . . . . . . 14 AC characteristics measured in typical application. . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Application information. . . . . . . . . . . . . . . . . . 15 Output power estimation. . . . . . . . . . . . . . . . . 15 Output current limiting. . . . . . . . . . . . . . . . . . . 16 Speaker configuration and impedance . . . . . . 16 Differential input . . . . . . . . . . . . . . . . . . . . . . . 17 Single-ended input . . . . . . . . . . . . . . . . . . . . . 17 Curves measured in a typical application . . . . 18 Typical application diagram TFA9815 . . . . . . . 19 Typical application: bill of materials. . . . . . . . . 21 Package outline . . . . . . . . . . . . . . . . . . . . . . . . 23 Revision history . . . . . . . . . . . . . . . . . . . . . . . . 24 Legal information. . . . . . . . . . . . . . . . . . . . . . . 25 Data sheet status . . . . . . . . . . . . . . . . . . . . . . 25 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Contact information. . . . . . . . . . . . . . . . . . . . . 25 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Please be aware that important notices concerning this document and the product(s) described herein, have been included in section `Legal information'.
(c) NXP B.V. 2008.
All rights reserved.
For more information, please visit: http://www.nxp.com For sales office addresses, please send an email to: salesaddresses@nxp.com Date of release: 16 December 2008 Document identifier: TFA9815_1

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