tda8922 1, Aplikacje data
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INTEGRATED CIRCUITS
DATA SHEET
25 W class-D power amplifier
Objective specification
2003 Mar 20
TDA8922
2
´
Philips Semiconductors
Objective specification
2
´
25 W class-D power amplifier
TDA8922
CONTENTS
17
PACKAGE OUTLINE
1
FEATURES
18
SOLDERING
18.1
Introduction
2
APPLICATIONS
18.2
Through-hole mount packages
3
GENERAL DESCRIPTION
18.2.1
Soldering by dipping or by solder wave
4
QUICK REFERENCE DATA
18.2.2
Manual soldering
18.3
Surface mount packages
5
ORDERING INFORMATION
18.3.1
Reflow soldering
6
BLOCK DIAGRAM
18.3.2
Wave soldering
7
PINNING
18.3.3
Manual soldering
8
FUNCTIONAL DESCRIPTION
18.4
Suitability of IC packages for wave, reflow and
dipping soldering methods
8.1
General
19
DATA SHEET STATUS
8.2
Pulse width modulation frequency
8.3
Protections
20
DEFINITIONS
8.3.1
Overtemperature
21
DISCLAIMERS
8.3.2
Short-circuit across loudspeaker terminals and
to supply lines
8.3.3
Start-up safety test
8.3.4
Supply voltage alarm
8.4
Differential audio inputs
9
LIMITING VALUES
10
THERMAL CHARACTERISTICS
11
QUALITY SPECIFICATION
12
STATIC CHARACTERISTICS
13
SWITCHING CHARACTERISTICS
14
DYNAMIC AC CHARACTERISTICS (STEREO
AND DUAL SE APPLICATION)
15
DYNAMIC AC CHARACTERISTICS (MONO
BTL APPLICATION)
16
APPLICATION INFORMATION
16.1
BTL application
16.2
Pin MODE
16.3
Output power estimation
16.4
External clock
16.5
Heatsink requirements
16.6
Output current limiting
16.7
Pumping effects
16.8
Reference design
16.9
PCB information for HSOP24 package
16.10
Classification
16.11
Bill of materials for reference design
16.12
Curves measured in reference design
16.13
Application schematics
2003 Mar 20
2
Philips Semiconductors
Objective specification
2
´
25 W class-D power amplifier
TDA8922
1 FEATURES
2 APPLICATIONS
·
High efficiency (
~
90%)
·
Television sets
·
Operating supply voltage from
±
12.5 to
±
30 V
·
Home-sound sets
·
Very low quiescent current
·
Multimedia systems
·
Low distortion
·
All mains fed audio systems
·
Usable as a stereo Single-Ended (SE) amplifier or as a
mono amplifier in Bridge-Tied Load (BTL)
·
Car audio (boosters).
·
Fixed gain of 30 dB in Single-Ended (SE) and 36 dB in
Bridge-Tied Load (BTL)
3 GENERAL DESCRIPTION
The TDA8922 is a high efficiency class-D audio power
amplifier with very low dissipation. The typical output
power is 2
·
High output power
·
Good ripple rejection
´
25 W.
·
Internal switching frequency can be overruled by an
external clock
The device is available in the HSOP24 power package
with a small internal heatsink and in the DBS23P
through-hole power package. Depending on the supply
voltage and load conditions, a very small or even no
external heatsink is required. The amplifier operates over
a wide supply voltage range from
·
No switch-on or switch-off plop noise
·
Short-circuit proof across load and to supply lines
·
Electrostatic discharge protection
±
12.5 to
±
30 V and
·
Thermally protected.
consumes a very low quiescent current.
4 QUICK REFERENCE DATA
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP. MAX. UNIT
General; V
P
=
±
20 V
V
P
supply voltage
±
12.5
±
20
±
30
V
I
q(tot)
total quiescent supply
current
no load connected
-
55
75
mA
h
efficiency
P
o
= 25 W; SE: R
L
=2
´
8
W
; f
i
= 1 kHz
-
90
-
%
Stereo single-ended configuration
P
o
output power
R
L
=8
W
; THD = 10%; V
P
=
±
20 V; note 1 22
25
-
W
R
L
=4
W
; THD = 10%; V
P
=
±
15 V; note 1 22
25
-
W
Mono bridge-tied load configuration
P
o
output power
R
L
=8
W
; THD = 10%; V
P
=
±
15 V; note 1 46
50
-
W
Note
1. See Section 16.5.
5 ORDERING INFORMATION
TYPE
NUMBER
PACKAGE
NAME
DESCRIPTION
VERSION
TDA8922TH
HSOP24
plastic, heatsink small outline package; 24 leads;
low stand-off height
SOT566-3
TDA8922J
DBS23P
plastic DIL-bent-SIL power package; 23 leads
(straight lead length 3.2 mm)
SOT411-1
2003 Mar 20
3
Philips Semiconductors
Objective specification
2
´
25 W class-D power amplifier
TDA8922
6 BLOCK DIAGRAM
handbook, full pagewidth
V
DDA2
V
DDA1
STABI
PROT
V
DDP2
V
DDP1
3 (20)
10 (4)
18 (12)
13 (7)
23 (16)
14 (8)
15 (9)
BOOT1
IN1
-
9 (3)
RELEASE1
DRIVER
HIGH
INPUT
STAGE
PWM
MODULATOR
8 (2)
SWITCH1
CONTROL
AND
HANDSHAKE
IN1
+
16 (10)
OUT1
ENABLE1
DRIVER
LOW
mute
11 (5)
SGND1
STABI
V
SSP1
7 (1)
OSC
TDA8922TH
(TDA8922J)
6 (23)
OSCILLATOR
MANAGER
TEMPERATURE SENSOR
CURRENT PROTECTION
V
DDP2
MODE
MODE
22 (15)
BOOT2
SGND2
2 (19)
mute
ENABLE2
DRIVER
HIGH
CONTROL
AND
HANDSHAKE
21 (14)
5 (22)
SWITCH2
OUT2
IN2
+
INPUT
STAGE
PWM
MODULATOR
DRIVER
LOW
4 (21)
RELEASE2
IN2
-
1 (18)
12 (6)
24 (17)
19 (-)
17 (11)
20 (13)
V
SSA2
V
SSA1
V
SSD
HW
(1)
V
SSP1
V
SSP2
MGU994
(1) Pin HW (TDA8922TH only) should be connected to pin V
SSD
in the application.
Pin numbers in parenthesis refer to the TDA8922J.
Fig.1 Block diagram.
2003 Mar 20
4
Philips Semiconductors
Objective specification
2
´
25 W class-D power amplifier
TDA8922
7 PINNING
SYMBOL
PIN
DESCRIPTION
TDA8922TH TDA8922J
V
SSA2
1
18
negative analog supply voltage for channel 2
SGND2
2
19
signal ground for channel 2
V
DDA2
3
20
positive analog supply voltage for channel 2
IN2
-
4
21
negative audio input for channel 2
IN2+
5
22
positive audio input for channel 2
MODE
6
23
mode selection input: standby, mute or operating
OSC
7
1
oscillator frequency adjustment or tracking input
IN1+
8
2
positive audio input for channel 1
IN1
-
9
3
negative audio input for channel 1
V
DDA1
10
4
positive analog supply voltage for channel 1
SGND1
11
5
signal ground for channel 1
V
SSA1
12
6
negative analog supply voltage for channel 1
PROT
13
7
time constant capacitor for protection delay
V
DDP1
14
8
positive power supply voltage for channel 1
BOOT1
15
9
bootstrap capacitor for channel 1
OUT1
16
10
PWM output from channel 1
V
SSP1
17
11
negative power supply voltage for channel 1
STABI
18
12
decoupling of internal stabilizer for logic supply
HW
19
-
handle wafer; must be connected to pin V
SSD
V
SSP2
20
13
negative power supply voltage for channel 2
OUT2
21
14
PWM output from channel 2
BOOT2
22
15
bootstrap capacitor for channel 2
V
DDP2
23
16
positive power supply voltage for channel 2
V
SSD
24
17
negative digital supply voltage
2003 Mar 20
5
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