TFA9842BJ 2-channel audio amplifier (SE: 1 W

TFA9842BJ
2-channel audio amplifier (SE: 1 W to 7.5 W)
Rev. 01 — 1 March 2004
Preliminary data sheet
1. General description
The TFA9842BJ contains two identical audio power amplifiers. The TFA9842BJ can be
used as two Single-Ended (SE) channels with a fixed gain of 26 dB.
The TFA9842BJ comes in a 9-pin DIL-bent-SIL (DBS9P) power package. The TFA9842BJ
is pin compatible with the TFA9841J, TFA9842J, TFA9843J and the TFA9843BJ.
The TFA9842BJ contains a unique protection circuit that is solely based on multiple
temperature measurements inside the chip. This gives maximum output power for all
supply voltages and load conditions with no unnecessary audio holes. Almost any supply
voltage and load impedance combination can be made as long as thermal boundary
conditions (number of channels used, external heatsink and ambient temperature) allow
it.
2. Features
■
■
■
■
■
■
■
■
■
1 W to 7.5 W operation possibility
Soft clipping
Standby and mute mode
No on or off switching plops
Low standby current
High supply voltage ripple rejection
Outputs short-circuit protected to ground, supply and across the load
Thermally protected
Pin compatible with the TFA9841J, TFA9842J, TFA9843J and the TFA9843BJ.
3. Applications
■
■
■
■
■
Televisions
Monitors
PC speakers
Boom boxes
Mini and micro audio receivers.
TFA9842BJ
Philips Semiconductors
2-channel auto amplifier (2 × SE)
4. Quick reference data
Table 1:
Quick reference data
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
VCC
supply voltage
operating
9
17
26
V
no signal
-
-
28
V
VCC = 17 V;
RL = ∞ Ω
-
60
100
mA
-
-
10
µA
Iq
quiescent supply current
Istb
standby supply current
Po
output power
THD = 10 %;
RL = 4 Ω;
VCC = 17 V
7
7.5
-
W
THD
total harmonic distortion
Po = 1 W
-
0.1
0.5
%
Gv
voltage gain
25
26
27
dB
SVRR
supply voltage ripple
rejection
-
60
-
dB
fripple = 1 kHz
5. Ordering information
Table 2:
Ordering information
Type number
TFA9842BJ
Package
Name
Description
Version
DBS9P
plastic DIL-bent-SIL power package; 9 leads (lead
length 12/11 mm); exposed die pad
SOT523 -1
9397 750 12847
Preliminary data sheet
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Rev. 01 — 1 March 2004
2 of 17
TFA9842BJ
Philips Semiconductors
2-channel auto amplifier (2 × SE)
6. Block diagram
VCC
9
IN1
4
8
OUT1
60
kΩ
IN2
1
2
OUT2
60
kΩ
CIV
3
VREF
SHORT-CIRCUIT
AND
TEMPERATURE
PROTECTION
VCC
MODE
7
STANDBY
MUTE
ON
0.5VCC
6
SVR
TFA9842BJ
5
001aaa443
GND
Fig 1. Block diagram.
7. Pinning information
7.1 Pinning
IN2
1
OUT2
2
CIV
3
IN1
4
GND
5
SVR
6
MODE
7
OUT1
8
VCC
9
TFA9842BJ
001aaa444
Fig 2. Pin configuration.
9397 750 12847
Preliminary data sheet
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Rev. 01 — 1 March 2004
3 of 17
TFA9842BJ
Philips Semiconductors
2-channel auto amplifier (2 × SE)
7.2 Pin description
Table 3:
Pin description
Symbol
Pin
Description
IN2
1
input 2
OUT2
2
loudspeaker terminal 2
CIV
3
common input voltage decoupling
IN1
4
input 1
GND
5
ground
SVR
6
half supply voltage decoupling (ripple rejection)
MODE
7
mode selection input (standby, mute and operating)
OUT1
8
loudspeaker terminal 1
VCC
9
supply voltage
8. Functional description
8.1 Input configuration
The input cut-off frequency is:
1
f i ( cut – off ) = ----------------------------2π ( R i × C i )
(1)
Application: Ri = 60 kΩ and Ci = 220 nF:
1
f i ( cut – off ) = ---------------------------------------------------------------- = 12 Hz
3
–9
2π ( 60 × 10 × 220 × 10 )
(2)
As shown in Equation 2 large capacitor values for the inputs are not necessary; so the
switch-on delay during charging of the input capacitors can be minimized. This results in a
good low frequency response and good switch-on behavior.
8.2 Power amplifier
The power amplifier is a Single-Ended (SE) amplifier with an all-NPN output stage,
capable of delivering a peak output current of 3 A.
8.2.1 Output power measurement
The output power as a function of the supply voltage is measured on the output pins at
THD = 10 %; see Figure 8. The maximum output power is limited by the supply voltage of
26 V and the maximum available output current is 3 A (repetitive peak current). A
minimum load of 3 Ω is required for VCC > 22 V; see Figure 5. The output power is
measured with one channel driven.
9397 750 12847
Preliminary data sheet
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Rev. 01 — 1 March 2004
4 of 17
TFA9842BJ
Philips Semiconductors
2-channel auto amplifier (2 × SE)
8.2.2 Headroom
Typical CD music requires at least 12 dB (factor 15.85) dynamic headroom, compared to
the average power output, for transferring the loudest parts without distortion. At
VCC = 17 V, Po = 5 W and RL = 4 Ω at THD = 0.2 % (see Figure 6), the Average Listening
Level (ALL) music power without any distortion yields:
3
5 × 10
P o ( ALL ) = ----------------- = 315 mW
15.85
(3)
The power dissipation can be derived from Figure 9 for 0 dB respectively 12 dB headroom
(see Table 4).
Table 4:
Power rating as function of headroom
Headroom
Power output (THD = 0.2 %)
Power dissipation;
both channels driven
0 dB
Po = 5 W
PD = 8.4 W
12 dB
Po(ALL) = 315 mW
PD = 4.2 W
For the average listening level a power dissipation of 4.2 W can be used for a heatsink
calculation.
8.3 Mode selection
The TFA9842BJ has three functional modes, which can be selected by applying the
proper DC voltage to pin MODE (see Table 5 and Figure 3).
Table 5:
Mode selection
VMODE
Amplifiers 1 and 2
0 V to 0.8 V
standby
4.5 V to (VCC − 3.5 V)
mute
(VCC − 2.0 V) to VCC
on
Standby — In this mode the current consumption is very low and the outputs are floating.
The device is in standby mode when VMODE < 0.8 V, or when pin MODE is grounded.
Mute — In this mode the amplifier is DC-biased but not operational (no audio output).
This allows the input coupling capacitors to be charged to avoid pop-noise. The device is
in mute mode when 4.5 V < VMODE < (VCC − 3.5 V).
On — In this mode the amplifier is operating normally. The operating mode is activated at
VMODE > (VCC − 2.0 V).
standby
all mute
0.8
4.5
1/2 on
VCC − 3.5
VCC − 2.0
VCC
VMODE (V)
001aaa416
Fig 3. Mode selection.
9397 750 12847
Preliminary data sheet
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Rev. 01 — 1 March 2004
5 of 17
TFA9842BJ
Philips Semiconductors
2-channel auto amplifier (2 × SE)
8.4 Supply voltage ripple rejection
The Supply Voltage Ripple Rejection (SVRR) is measured with an electrolytic capacitor of
150 µF on pin SVR using a bandwidth of 20 Hz to 22 kHz. Figure 11 illustrates the SVRR
as function of the frequency. A larger capacitor value on pin SVR improves the ripple
rejection behavior at the lower frequencies.
8.5 Built-in protection circuits
The TFA9842BJ contains two types of temperature sensors; one measures local
temperatures of the power stages and one measures the global chip temperature. At a
local temperature of the power stage of approximately 185 °C or a global temperature of
approximately 150 °C this detection circuit switches off the power stages for 2 ms. High
impedance of the outputs is the result. After this time period the power stages switch on
automatically and the detection will take place again; still a too high temperature switches
off the power stages immediately. This protects the TFA9842BJ against shorts to ground,
to the supply voltage, across the load and also to high chip temperatures.
The protection will only be activated when necessary, so even during a short-circuit
condition, a certain amount of (pulsed) current will still be flowing through the short, just as
much as the power stage can handle without exceeding the critical temperature level.
9. Limiting values
Table 6:
Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol
Parameter
Conditions
Min
Max
Unit
VCC
supply voltage
operating
−0.3
+26
V
no signal
−0.3
+28
V
VI
input voltage
−0.3
VCC + 0.3
V
IORM
repetitive peak output current
-
3
A
Tstg
storage temperature
non-operating
−55
+150
°C
Tamb
ambient temperature
operating
−40
+85
°C
Ptot
total power dissipation
-
35
W
VCC(sc)
supply voltage to guarantee
short-circuit protection
-
24
V
10. Thermal characteristics
Table 7:
Thermal characteristics
Symbol
Parameter
Conditions
Typ
Unit
Rth(j-a)
thermal resistance from junction
to ambient
in free air
40
K/W
Rth(j-c)
thermal resistance from junction
to case
both channels
driven
2.0
K/W
9397 750 12847
Preliminary data sheet
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Rev. 01 — 1 March 2004
6 of 17
TFA9842BJ
Philips Semiconductors
2-channel auto amplifier (2 × SE)
11. Static characteristics
Table 8:
Static characteristics
VCC = 17 V; Tamb = 25 °C; RL = 4 Ω; VMODE = VCC; Vi = 0 V; measured in test circuit Figure 12;
unless otherwise specified.
Symbol
Parameter
Conditions
VCC
supply voltage
operating
[1]
Iq
quiescent
supply current
RL = ∞ Ω
[2]
Istb
standby supply
current
VMODE = 0 V
VO
DC output
voltage
VMODE
mode selection
input voltage
IMODE
[3]
input current on
pin MODE
Min
Typ
Max
Unit
9
17
26
V
-
60
100
mA
-
-
10
µA
-
9
-
V
V
on mode
VCC − 2.0 -
VCC
mute mode
4.5
-
VCC − 3.5 V
standby mode
0
-
0.8
V
0 V < VMODE < (VCC − 3.5)
-
-
20
µA
[1]
A minimum load of 3 Ω is allowed at VCC > 22 V.
[2]
With a load connected at the outputs the quiescent supply current will increase.
[3]
The DC output voltage with respect to ground is approximately 0.5VCC.
12. Dynamic characteristics
Table 9:
Dynamic characteristics
VCC = 17 V; Tamb = 25 °C; RL = 4 Ω; f = 1 kHz; VMODE = VCC; measured in test circuit Figure 12;
unless otherwise specified.
Symbol
Parameter
Po
output power
Conditions
Typ
Max
Unit
THD = 10 %
7
7.5
-
W
THD = 0.5 %
-
6.1
-
W
Po = 1 W
-
0.1
0.5
%
THD
total harmonic
distortion
Gv
voltage gain
25
26
27
dB
Zi
input impedance
40
60
-
kΩ
Vn(o)
noise output
voltage
[1]
-
150
-
µV
SVRR
supply voltage
ripple rejection
fripple = 1 kHz
[2]
-
60
-
dB
fripple = 100 Hz to 20 kHz
[2]
-
60
-
dB
[3]
-
-
150
µV
50
60
-
dB
-
-
1
dB
Vo(mute)
output voltage in
mute mode
αcs
channel
separation
|Gv|
channel
unbalance
[1]
Rsource = 0 Ω
The noise output voltage is measured at the output in a frequency range from 20 Hz to 22 kHz
(unweighted), with a source impedance Rsource = 0 Ω at the input.
9397 750 12847
Preliminary data sheet
Min
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Rev. 01 — 1 March 2004
7 of 17
TFA9842BJ
Philips Semiconductors
2-channel auto amplifier (2 × SE)
[2]
SVRR is measured at the output, with a source impedance Rsource = 0 Ω at the input and with a frequency
range from 20 Hz to 22 kHz (unweighted). The ripple voltage is a sine wave with a frequency fripple and an
amplitude of 300 mV (RMS), which is applied to the positive supply rail.
[3]
Output voltage in mute mode (VMODE = 7 V) and an input voltage of 1 V (RMS) in a bandwidth from 20 Hz
to 22 kHz, so including noise.
001aaa417
107
Vo
(µV)
106
001aaa445
40
Po
(W)
30
105
104
20
2Ω
103
102
3Ω
4Ω
8Ω
RL = 1 Ω
10
10
1
0
4
8
12
16
20
0
8
12
20
16
VMODE (V)
Vi = 100 mV; VCC = 17 V.
24
28
VCC (V)
THD = 10 %.
Fig 4. AC output voltage as function of mode
selection voltage.
001aaa419
102
THD+N
(%)
Fig 5. Output power (one channel) as function of
supply voltage for various loads.
001aaa446
10
THD+N
(%)
10
1
1
10−1
10−1
10−2
10−1
1
10
Po (W)
102
VCC = 17 V; f = 1 kHz; RL = 4 Ω.
10−2
10
103
104
f (Hz)
105
VCC = 17 V; Po = 1 W; RL = 4 Ω.
Fig 6. Total harmonic distortion-plus-noise as
function of output power.
Fig 7. Total harmonic distortion-plus-noise as
function of frequency.
9397 750 12847
Preliminary data sheet
102
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Rev. 01 — 1 March 2004
8 of 17
TFA9842BJ
Philips Semiconductors
2-channel auto amplifier (2 × SE)
001aaa447
15
Po
(W)
001aaa422
10
PD
(W)
12
8
9
6
6
4
3
2
0
0
8
10
12
14
16
18
VCC (V)
THD = 10 %; RL = 4 Ω; f = 1 kHz.
0
8
4
12
16
20
Po (W)
VCC = 17 V; RL = 4 Ω.
Fig 8. Output power as function of supply voltage.
001aaa423
0
αcs
(dB)
Fig 9. Total (worst case, both channels driven) power
dissipation as function of channel output power
per channel.
001aaa424
0
SVRR
(dB)
−20
−20
−40
−40
−60
−60
−80
−100
10
102
103
104
105
−80
10
VCC = 17 V; RL = 4 Ω.
103
104
105
VCC = 17 V; Rsource = 0 Ω; Vripple = 300 mV (RMS); a
bandpass filter of 20 Hz to 22 kHz has been applied;
inputs short-circuited.
Fig 10. Channel separation as function of frequency
(no bandpass filter applied).
Fig 11. Supply voltage ripple rejection as function of
frequency.
9397 750 12847
Preliminary data sheet
102
f (Hz)
f (Hz)
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Rev. 01 — 1 March 2004
9 of 17
TFA9842BJ
Philips Semiconductors
2-channel auto amplifier (2 × SE)
13. Application information
13.1 Application diagram
VCC
VCC
1000 µF
100 nF
9
220 nF
IN1 4
Vi
8 OUT1
470 µF
60
kΩ
220 nF
−
IN2 1
Vi
+
RL
4Ω
2 OUT2
470 µF
60
kΩ
CIV 3
VREF
+
−
SHORT-CIRCUIT
AND
TEMPERATURE
PROTECTION
RL
4Ω
VCC
MODE 7
VCC
10
kΩ
50
kΩ
100
kΩ
7.5 V
microcontroller
22
µF
270 Ω
BC547
BC547
2.2
µF
STANDBY
MUTE
ON
0.5VCC
SVR 6
TFA9842BJ
47
µF
5
1.5
kΩ
001aaa448
GND
Fig 12. Application diagram.
Remark: Switching inductive loads, the output voltage can rise beyond the maximum
supply voltage of 28 V. At high supply voltage it is recommended to use (Schottky) diodes
to the supply voltage and ground.
13.2 Printed-circuit board
13.2.1 Layout and grounding
To obtain a high-level system performance, certain grounding techniques are essential.
The input reference grounds have to be tied with their respective source grounds and
must have separate tracks from the power ground tracks; this will prevent the large
(output) signal currents from interfering with the small AC input signals. The small-signal
ground tracks should be physically located as far as possible from the power ground
tracks. Supply and output tracks should be as wide as possible for delivering maximum
output power.
9397 750 12847
Preliminary data sheet
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Rev. 01 — 1 March 2004
10 of 17
TFA9842BJ
Philips Semiconductors
2-channel auto amplifier (2 × SE)
AUDIO POWER CS NIJMEGEN
PF / 3002 .naJ 72
TVA
1000 µF
1
BTL1/2
100 nF
−SE1+
1000 µF
1000 µF
220
nF
SVR
150 µF
SVR
−SE2+
220
nF
CIV
22
µF
MODE
SGND
+VP
10
kΩ
10 kΩ
CIV
IN2+
IN1+
SB ON
MUTE
001aaa426
Fig 13. Printed-circuit board layout (single-sided); components view.
13.2.2 Power supply decoupling
Proper supply bypassing is critical for low-noise performance and high supply voltage
ripple rejection. The respective capacitor location should be as close as possible to the
device and grounded to the power ground. Proper power supply decoupling also prevents
oscillations.
For suppressing higher frequency transients (spikes) on the supply line a capacitor with
low ESR, typical 100 nF, has to be placed as close as possible to the device. For
suppressing lower frequency noise and ripple signals, a large electrolytic capacitor, e.g.
1000 µF or greater, must be placed close to the device.
The bypass capacitor on pin SVR reduces the noise and ripple on the mid rail voltage. For
good THD and noise performance a low ESR capacitor is recommended.
13.3 Thermal behavior and heatsink calculation
The measured maximum thermal resistance of the IC package, Rth(j-c), is 2.0 K/W.
A calculation for the heatsink can be made, with the following parameters:
Tamb(max) = 60 °C (example)
VCC = 17 V and RL = 4 Ω
Tj(max) = 150 °C (specification).
9397 750 12847
Preliminary data sheet
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Rev. 01 — 1 March 2004
11 of 17
TFA9842BJ
Philips Semiconductors
2-channel auto amplifier (2 × SE)
Rth(tot) is the total thermal resistance between the junction and the ambient including the
heatsink. This can be calculated using the maximum temperature increase divided by the
power dissipation:
Rth(tot) = (Tj(max) − Tamb(max))/PD.
At VCC = 17 V and RL = 4 Ω (2 × SE) the measured worst-case sine-wave dissipation is
8.4 W (see Figure 9). For Tj(max) = 150 °C the temperature raise, caused by the power
dissipation, is: 150 − 60 = 90 °C:
P × Rth(tot) = 90 °C
Rth(tot) = 90/8.4 = 10.7 K/W
Rth(h-a) = Rth(tot) − Rth(j-c) = 10.7 − 2.0 = 8.7 K/W.
This calculation is for an application at worst-case (stereo) sine-wave output signals. In
practice music signals will be applied, which decreases the maximum power dissipation to
approximately half of the sine-wave power dissipation (see Section 8.2.2). This allows for
the use of a smaller heatsink:
P × Rth(tot) = 90 °C
Rth(tot) = 90/4.2 = 21.4 K/W
Rth(h-a) = Rth(tot) − Rth(j-c) = 21.4 − 2.0 = 19.4 K/W.
001aaa449
150
RL = 2 Ω
Tj
(°C)
4Ω
6Ω
8Ω
16 Ω
100
50
0
8
12
16
20
24
28
VCC (V)
2 × SE loads; Tamb = 25 °C; external heatsink of 10 K/W; music signals.
Fig 14. Junction temperature as function of supply voltage for various loads.
14. Test information
14.1 Quality information
The General Quality Specification for Integrated Circuits, SNW-FQ-611 is applicable.
9397 750 12847
Preliminary data sheet
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Rev. 01 — 1 March 2004
12 of 17
TFA9842BJ
Philips Semiconductors
2-channel auto amplifier (2 × SE)
15. Package outline
DBS9P: plastic DIL-bent-SIL power package; 9 leads (lead length 12/11 mm); exposed die pad
SOT523-1
q1
non-concave
x
Eh
Dh
D
D1
view B: mounting base side
P
A2
k
q2
B
E
q
L2
L3
L1
L
1
9
e1
Z
e
Q
w M
bp
0
5
scale
DIMENSIONS (mm are the original dimensions)
UNIT A2(2) bp
mm
c
D(1) D1(2) Dh E(1) Eh
2.7 0.80 0.58 13.2
2.3 0.65 0.48 12.8
10 mm
v M
c
e2
m
e
e1
e2
6.2
14.7
3.5 2.54 1.27 5.08
3.5
5.8
14.3
L
k
3
2
L1
L2
L3
m
12.4 11.4 6.7
11.0 10.0 5.5
4.5
3.7
2.8
P
Q
q
q1
q2
3.4 1.15 17.5
4.85 3.8
3.1 0.85 16.3
3.6
v
w
x
0.8 0.3 0.02
Z(1)
1.65
1.10
Notes
1. Plastic or metal protrusions of 0.25 mm maximum per side are not included.
2. Plastic surface within circle area D1 may protrude 0.04 mm maximum.
OUTLINE
VERSION
REFERENCES
IEC
JEDEC
JEITA
EUROPEAN
PROJECTION
ISSUE DATE
00-07-03
03-03-12
SOT523-1
Fig 15. Package outline.
9397 750 12847
Preliminary data sheet
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Rev. 01 — 1 March 2004
13 of 17
TFA9842BJ
Philips Semiconductors
2-channel auto amplifier (2 × SE)
16. Soldering
16.1 Introduction to soldering through-hole mount packages
This text gives a brief insight to wave, dip and manual soldering. A more in-depth account
of soldering ICs can be found in our Data Handbook IC26; Integrated Circuit Packages
(document order number 9398 652 90011).
Wave soldering is the preferred method for mounting of through-hole mount IC packages
on a printed-circuit board.
16.2 Soldering by dipping or by solder wave
Driven by legislation and environmental forces the worldwide use of lead-free solder
pastes is increasing. Typical dwell time of the leads in the wave ranges from
3 to 4 seconds at 250 °C or 265 °C, depending on solder material applied, SnPb or
Pb-free respectively.
The total contact time of successive solder waves must not exceed 5 seconds.
The device may be mounted up to the seating plane, but the temperature of the plastic
body must not exceed the specified maximum storage temperature (Tstg(max)). If the
printed-circuit board has been pre-heated, forced cooling may be necessary immediately
after soldering to keep the temperature within the permissible limit.
16.3 Manual soldering
Apply the soldering iron (24 V or less) to the lead(s) of the package, either below the
seating plane or not more than 2 mm above it. If the temperature of the soldering iron bit is
less than 300 °C it may remain in contact for up to 10 seconds. If the bit temperature is
between 300 and 400 °C, contact may be up to 5 seconds.
16.4 Package related soldering information
Table 10:
Suitability of through-hole mount IC packages for dipping and wave soldering
methods
Package
Soldering method
Dipping
Wave
DBS, DIP, HDIP, RDBS, SDIP, SIL
suitable
suitable [1]
PMFP [2]
−
not suitable
[1]
For SDIP packages, the longitudinal axis must be parallel to the transport direction of the printed-circuit
board.
[2]
For PMFP packages hot bar soldering or manual soldering is suitable.
9397 750 12847
Preliminary data sheet
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Rev. 01 — 1 March 2004
14 of 17
TFA9842BJ
Philips Semiconductors
2-channel auto amplifier (2 × SE)
17. Revision history
Table 11:
Revision history
Document ID
Release date
Data sheet status
Change notice
Order number
Supersedes
TFA9842BJ
20040301
Preliminary data
−
9397 750 12847
−
9397 750 12847
Preliminary data sheet
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Rev. 01 — 1 March 2004
15 of 17
TFA9842BJ
Philips Semiconductors
2-channel auto amplifier (2 × SE)
18. Data sheet status
Level
Data sheet status [1]
Product status [2] [3]
Definition
I
Objective data
Development
This data sheet contains data from the objective specification for product development. Philips
Semiconductors reserves the right to change the specification in any manner without notice.
II
Preliminary data
Qualification
This data sheet contains data from the preliminary specification. Supplementary data will be published
at a later date. Philips Semiconductors reserves the right to change the specification without notice, in
order to improve the design and supply the best possible product.
III
Product data
Production
This data sheet contains data from the product specification. Philips Semiconductors reserves the
right to make changes at any time in order to improve the design, manufacturing and supply. Relevant
changes will be communicated via a Customer Product/Process Change Notification (CPCN).
[1]
Please consult the most recently issued data sheet before initiating or completing a design.
[2]
The product status of the device(s) described in this data sheet may have changed since this data sheet was published. The latest information is available on the Internet at
URL http://www.semiconductors.philips.com.
[3]
For data sheets describing multiple type numbers, the highest-level product status determines the data sheet status.
19. Definitions
customers using or selling these products for use in such applications do so
at their own risk and agree to fully indemnify Philips Semiconductors for any
damages resulting from such application.
Short-form specification — The data in a short-form specification is
extracted from a full data sheet with the same type number and title. For
detailed information see the relevant data sheet or data handbook.
Right to make changes — Philips Semiconductors reserves the right to
make changes in the products - including circuits, standard cells, and/or
software - described or contained herein in order to improve design and/or
performance. When the product is in full production (status ‘Production’),
relevant changes will be communicated via a Customer Product/Process
Change Notification (CPCN). Philips Semiconductors assumes no
responsibility or liability for the use of any of these products, conveys no
license or title under any patent, copyright, or mask work right to these
products, and makes no representations or warranties that these products are
free from patent, copyright, or mask work right infringement, unless otherwise
specified.
Limiting values definition — Limiting values given are in accordance with
the Absolute Maximum Rating System (IEC 60134). Stress above one or
more of the limiting values may cause permanent damage to the device.
These are stress ratings only and operation of the device at these or at any
other conditions above those given in the Characteristics sections of the
specification is not implied. Exposure to limiting values for extended periods
may affect device reliability.
Application information — Applications that are described herein for any
of these products are for illustrative purposes only. Philips Semiconductors
make no representation or warranty that such applications will be suitable for
the specified use without further testing or modification.
20. Disclaimers
Life support — These products are not designed for use in life support
appliances, devices, or systems where malfunction of these products can
reasonably be expected to result in personal injury. Philips Semiconductors
Hazardous voltage — Although basic supply voltages of the product may be
much lower, circuit voltages up to 60 V may appear when operating this
product, depending on settings and application. Philips customers
incorporating or otherwise using these products in applications where such
high voltages may appear during operation, assembly, test etc. of such
application, do so at their own risk. The Philips customers agree to fully
indemnify Philips for any damages resulting from or in connection with such
high voltages. Furthermore Philips customers are drawn to safety standards
(IEC 950, EN 60 950, CENELEC, ISO, etc.) and other (legal) requirements
applying for such high voltages.
21. Contact information
For additional information, please visit: http://www.semiconductors.philips.com
For sales office addresses, send an email to: sales.addresses@www.semiconductors.philips.com
9397 750 12847
Preliminary data sheet
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Rev. 01 — 1 March 2004
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TFA9842BJ
Philips Semiconductors
2-channel auto amplifier (2 × SE)
22. Contents
1
2
3
4
5
6
7
7.1
7.2
8
8.1
8.2
8.2.1
8.2.2
8.3
8.4
8.5
9
10
11
12
13
13.1
13.2
13.2.1
13.2.2
13.3
14
14.1
15
16
16.1
16.2
16.3
16.4
17
18
19
20
21
General description . . . . . . . . . . . . . . . . . . . . . . 1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Quick reference data . . . . . . . . . . . . . . . . . . . . . 2
Ordering information . . . . . . . . . . . . . . . . . . . . . 2
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pinning information . . . . . . . . . . . . . . . . . . . . . . 3
Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 4
Functional description . . . . . . . . . . . . . . . . . . . 4
Input configuration . . . . . . . . . . . . . . . . . . . . . . 4
Power amplifier . . . . . . . . . . . . . . . . . . . . . . . . . 4
Output power measurement . . . . . . . . . . . . . . . 4
Headroom . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Mode selection . . . . . . . . . . . . . . . . . . . . . . . . . 5
Supply voltage ripple rejection . . . . . . . . . . . . . 6
Built-in protection circuits . . . . . . . . . . . . . . . . . 6
Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 6
Thermal characteristics. . . . . . . . . . . . . . . . . . . 6
Static characteristics. . . . . . . . . . . . . . . . . . . . . 7
Dynamic characteristics . . . . . . . . . . . . . . . . . . 7
Application information. . . . . . . . . . . . . . . . . . 10
Application diagram . . . . . . . . . . . . . . . . . . . . 10
Printed-circuit board . . . . . . . . . . . . . . . . . . . . 10
Layout and grounding . . . . . . . . . . . . . . . . . . . 10
Power supply decoupling . . . . . . . . . . . . . . . . 11
Thermal behavior and heatsink calculation . . 11
Test information . . . . . . . . . . . . . . . . . . . . . . . . 12
Quality information . . . . . . . . . . . . . . . . . . . . . 12
Package outline . . . . . . . . . . . . . . . . . . . . . . . . 13
Soldering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Introduction to soldering through-hole mount
packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Soldering by dipping or by solder wave . . . . . 14
Manual soldering . . . . . . . . . . . . . . . . . . . . . . 14
Package related soldering information . . . . . . 14
Revision history . . . . . . . . . . . . . . . . . . . . . . . . 15
Data sheet status . . . . . . . . . . . . . . . . . . . . . . . 16
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Contact information . . . . . . . . . . . . . . . . . . . . 16
© Koninklijke Philips Electronics N.V. 2004
All rights are reserved. Reproduction in whole or in part is prohibited without the prior
written consent of the copyright owner. The information presented in this document does
not form part of any quotation or contract, is believed to be accurate and reliable and may
be changed without notice. No liability will be accepted by the publisher for any
consequence of its use. Publication thereof does not convey nor imply any license under
patent- or other industrial or intellectual property rights.
Date of release: 1 March 2004
Document order number: 9397 750 12847
Published in The Netherlands
Mouser Electronics
Authorized Distributor
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TFA9842BJ/N1,112
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