TFA9810 NXP Semiconductors, TFA9810 Datasheet

The TFA9810 is a two-channel power comparator for high-efficiency class D audioamplifier systems

TFA9810

Manufacturer Part Number
TFA9810
Description
The TFA9810 is a two-channel power comparator for high-efficiency class D audioamplifier systems
Manufacturer
NXP Semiconductors
Datasheet

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TFA9810T
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1. General description
2. Features
3. Applications
4. Quick reference data
The TFA9810 is a two-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 amplifier system or open-loop
system can be built. The TFA9810 does not require a heat sink and operates using an
asymmetrical supply voltage.
I
I
I
I
I
I
I
I
I
I
I
I
Table 1.
T
Symbol
V
I
I
off
q
amb
po
P
TFA9810
Stereo full-bridge audio amplifier 2 x 12 W
Rev. 03 — 20 February 2008
Stereo full-bridge power comparator for class D audio amplifier 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)
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
= 25 C; V
Quick reference data
Parameter
supply voltage
off-state current
quiescent current
output power
efficiency
P
= 12 V; f
osc
= 550 kHz;
Condition
V
off mode
with load, filter and
snubbers connected
output power
2 x 9 W into 8 ;
P
P
o
= P
= V
Figure 33
o(nom)
DDPx
V
unless otherwise specified
SSPx
Min
8
-
-
87
Product data sheet
Typ
12
110
35
89
Max
20
200
45
-
Unit
V
mA
%
A

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TFA9810 Summary of contents

Page 1

... 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 amplifier system or open-loop system can be built. The TFA9810 does not require a heat sink and operates using an asymmetrical supply voltage. 2. Features I Stereo full-bridge power comparator for class D audio amplifi ...

Page 2

... THD = 10 %; thermally limited THD = 10 %; thermally limited THD = 10 %; thermally limited Description SO32: plastic small outline package; 32 leads; body width 7.5 mm Rev. 03 — 20 February 2008 TFA9810 Audio amplifi unless otherwise specified Min Typ = 9 8.5 9.5 6.5 7 ...

Page 3

... DRIVER LOW DRIVER HIGH CONTROL LOGIC DRIVER LOW STABI2 DRIVER HIGH CONTROL LOGIC DRIVER LOW HEATSPREADER SSD(HW) Rev. 03 — 20 February 2008 TFA9810 Audio amplifi BOOT1P V 25 DDP1 26 OUT1P V 30 SSP1 29 BOOT1N V DDP1 28 OUT1N V SSP1 31 STAB1 22 BOOT2P ...

Page 4

... Positive analog supply voltage channel 2 Rev. 03 — 20 February 2008 TFA9810 Audio amplifi SSD(HW) 31 STAB1 30 V SSP1 29 BOOT1N 28 OUT1N 27 BOOT1P 26 OUT1P 25 V DDP1 TFA9810 24 V DDP2 SO32 23 OUT2P 22 BOOT2P 21 OUT2N 20 BOOT2N 19 V SSP2 18 STAB2 SSD(HW 010aaa017 in the application. Together with SSA © ...

Page 5

... STAB1 8. Functional description 8.1 General The TFA9810 is a dual-switching power comparator 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 closed-loop self-oscillating digital amplifi ...

Page 6

... NXP Semiconductors In SLEEP mode the TFA9810 is not biased and has a very low supply current. When the TFA9810 is set to OPERATING mode the device is started via the start-up sequence, which provides a pop-free start-up behavior. After start-up the reference voltages STAB are present and the outputs start switching. ...

Page 7

... UnderVoltage Protection (UVP) When the supply voltage applied to the TFA9810 falls below the minimum supply voltage threshold level the device will shut down. The device will restart when the supply voltage is within the operating range. ...

Page 8

... Start-up sequence 9. Internal circuitry Fig 4. TFA9810_3 Product data sheet FLOATING PWM AUDIO OPERATING FAULT RESTART 1,16, 17, 32 Internal circuitry 0001 Rev. 03 — 20 February 2008 TFA9810 Audio amplifi PWM AUDIO OPERATING SHUT-DOWN SLEEP 010aaa018 V DDA SSA 010aaa024 © NXP B.V. 2008. All rights reserved. ...

Page 9

... Internal circuitry 0003 V DDA1 6 Internal circuitry 0004 Rev. 03 — 20 February 2008 Audio amplifi DDA1 135 k 5 SSA 135 k 5 SSA1 010aaa025 22 V 010aaa026 V DDA1 50 A 110 k V SSA1 V SSA 010aaa027 © NXP B.V. 2008. All rights reserved. TFA9810 ...

Page 10

... Fig 10. Internal circuitry 0007 TFA9810_3 Product data sheet V DDA1 7 Internal circuitry 0005 V DDA1 8 Internal circuitry 0006 V DDA1 10 V SSA1 Rev. 03 — 20 February 2008 TFA9810 Audio amplifi 250 nA V SSA 010aaa028 2 nA 200 DISCHARGE V SSA1 010aaa029 V SSD 010aaa030 © ...

Page 11

... TFA9810_3 Product data sheet V DDA1 130 k hvp V SSA2 130 DDA2 100 SSD 010aaa034 Rev. 03 — 20 February 2008 TFA9810 Audio amplifi SSA1 010aaa031 V DDA2 5 SSA2 010aaa033 © NXP B.V. 2008. All rights reserved ...

Page 12

... Fig 17. Internal circuitry 0014 Fig 18. Internal circuitry 0015 TFA9810_3 Product data sheet 24 23 010aaa035 OUT2N 010aaa036 V DDP2 21 V SSP2 010aaa037 OUT2P 010aaa038 Rev. 03 — 20 February 2008 TFA9810 Audio amplifi © NXP B.V. 2008. All rights reserved ...

Page 13

... Fig 20. Internal circuitry 0017 Fig 21. Internal circuitry 0018 Fig 22. Internal circuitry 0019 TFA9810_3 Product data sheet V DDP2 23 V SSP2 010aaa039 25 23 010aaa040 V DDP1 26 V SSP1 010aaa041 Rev. 03 — 20 February 2008 TFA9810 Audio amplifi © NXP B.V. 2008. All rights reserved ...

Page 14

... Rev. 03 — 20 February 2008 Audio amplifi DDP1 V SSP1 010aaa043 12 V OUT1N 010aaa044 100 SSD 010aaa045 Conditions Min Max asymmetrical 0.3 + +150 55 +150 40 +85 - 2.5 © NXP B.V. 2008. All rights reserved. TFA9810 Unit ...

Page 15

... Conditions DDPx SSPx off mode with load, filter, and snubbers connected with respect to V SSD SSD Rev. 03 — 20 February 2008 TFA9810 Audio amplifi Conditions Min Max DIAG V 0.3 +12 SS IN1P - IN1N 12 +12 IN2P - IN2N 12 ...

Page 16

... V SSD SSD with respect < f < 20 kHz level internal fixed level internal fixed high level low level Figure 33 unless otherwise specified. Conditions Rev. 03 — 20 February 2008 TFA9810 Audio amplifi Min Typ Max - 0 4.5 ...

Page 17

... THD = 10 %; thermally limited kHz; AES17 o brick-wall filter 100 mV (RMS kHz I i Inputs shorted; AES17 brick-wall filter Rev. 03 — 20 February 2008 TFA9810 Audio amplifi Min Typ Max - [ ...

Page 18

... Figure 27 below show the estimated output power at THD = 0.5 % and Rev. 03 — 20 February 2008 Audio amplifi …continued Min Typ - 96 [ [V] Equation TFA9810 Max Unit - (1) 2: (2) © NXP B.V. 2008. All rights reserved ...

Page 19

... ( ( ----------------------------------------------------- - DSon s V DDPx SSPx Rev. 03 — 20 February 2008 Audio amplifi ( ( [V]. TFA9810 010aaa019 (3) 20 010aaa020 (3) 20 (3) © NXP B.V. 2008. All rights reserved ...

Page 20

... C LC Table 12 shows the practical required values: Filter component values Impedance [ ] IN1P AUDIO DSP IN1N V SS Rev. 03 — 20 February 2008 TFA9810 Audio amplifi according to the speaker configuration and [nF 1500 16 1000 22 680 OUT1P ...

Page 21

... IN1P AUDIO DSP IN1N +30 v +25 +20 (1) (2) +15 + 100 (1) OUT1 (2) OUT2 Rev. 03 — 20 February 2008 TFA9810 Audio amplifi OUT1P OUT1N 010aaa022 010aaa197 (Hz) i © NXP B.V. 2008. All rights reserved ...

Page 22

... NXP Semiconductors THD+N Fig 31. Total harmonic distortion + noise as a function of frequency THD+N Fig 32. Total harmonic distortion as a function of output power 14.7 Typical application diagram TFA9810 The typical application diagram with the TFA9810 supplied from an asymmetrical supply is shown in TFA9810_3 Product data sheet 10 (%) ...

Page 23

... C22 68 pF C24 C26 220 pF GND 1 F IN2N R22 R23 R34 R26 100 k R100 22 GND V SSA1 OUT2+ Fig 33. Typical application diagram TFA9810 BEAD BEAD 220 F 220 F C31 100 100 nF 100 nF GND GND n.c DDA1 ...

Page 24

... C24 C26 220 pF GND 1 F IN2N R22 R23 R34 R26 100 k R100 22 GND V SSA1 OUT2+ Fig 34. Typical application diagram TFA9810 with externally adjusted switch-on time BEAD BEAD 220 F 220 F C31 100 100 nF 100 nF GND GND V V ...

Page 25

... SMD 1206 Würth Elektronik DC < 0.5 10 MHz > 80 8RDY TOKO A7040HN-220M, 11RHBP TOKO A7503CY-220M or Sagami 7311NA-220M SMD 1206 SMD 0603 SMD 0603 Secme 090320901 SOT287-1 (SO32) NXP Semiconductors Part Footprint SMD 0805 X7R SMD 1206 5 % TFA9810 © NXP B.V. 2008. All rights reserved ...

Page 26

... detail 1.1 1.2 1.4 0.25 0.25 0.1 0.4 1.0 0.043 0.047 0.004 0.055 0.01 0.01 0.016 0.039 EUROPEAN PROJECTION TFA9810 SOT287 ( 0. 0.037 0.022 ISSUE DATE 00-08-17 03-02-19 © NXP B.V. 2008. All rights reserved ...

Page 27

... Product data sheet Data sheet status Product data sheet has been updated. has been added. Preliminary data sheet Preliminary data sheet Rev. 03 — 20 February 2008 TFA9810 Audio amplifi Change notice Supersedes - TFA9810_2 - TFA9810_1 - - © NXP B.V. 2008. All rights reserved ...

Page 28

... Trademarks Notice: All referenced brands, product names, service names and trademarks are the property of their respective owners. http://www.nxp.com salesaddresses@nxp.com Rev. 03 — 20 February 2008 TFA9810 Audio amplifi © NXP B.V. 2008. All rights reserved ...

Page 29

... Output power estimation 14.2 Output current limiting 14.3 Speaker configuration and impedance . . . . . . 20 14.4 Differential input . . . . . . . . . . . . . . . . . . . . . . . 20 14.5 Single-ended input . . . . . . . . . . . . . . . . . . . . . 20 14.6 Curves measured in a typical application . . . . 21 14.7 Typical application diagram TFA9810 . . . . . . . 22 14.8 Typical application: bill of materials 14.9 Snubber network Test information . . . . . . . . . . . . . . . . . . . . . . . . 25 16 Package outline . . . . . . . . . . . . . . . . . . . . . . . . 26 17 Revision history . . . . . . . . . . . . . . . . . . . . . . . . 27 18 Legal information ...

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