INTEGRATED CIRCUITS
DATA SHEET
TDA8922
2
×
25 W class-D power amplifier
Objective specification
2003 Mar 20
Philips Semiconductors
Objective specification
2
×
25 W class-D power amplifier
CONTENTS
1
2
3
4
5
6
7
8
8.1
8.2
8.3
8.3.1
8.3.2
8.3.3
8.3.4
8.4
9
10
11
12
13
14
15
16
16.1
16.2
16.3
16.4
16.5
16.6
16.7
16.8
16.9
16.10
16.11
16.12
16.13
FEATURES
APPLICATIONS
GENERAL DESCRIPTION
QUICK REFERENCE DATA
ORDERING INFORMATION
BLOCK DIAGRAM
PINNING
FUNCTIONAL DESCRIPTION
General
Pulse width modulation frequency
Protections
Overtemperature
Short-circuit across loudspeaker terminals and
to supply lines
Start-up safety test
Supply voltage alarm
Differential audio inputs
LIMITING VALUES
THERMAL CHARACTERISTICS
QUALITY SPECIFICATION
STATIC CHARACTERISTICS
SWITCHING CHARACTERISTICS
DYNAMIC AC CHARACTERISTICS (STEREO
AND DUAL SE APPLICATION)
DYNAMIC AC CHARACTERISTICS (MONO
BTL APPLICATION)
APPLICATION INFORMATION
BTL application
Pin MODE
Output power estimation
External clock
Heatsink requirements
Output current limiting
Pumping effects
Reference design
PCB information for HSOP24 package
Classification
Bill of materials for reference design
Curves measured in reference design
Application schematics
17
18
18.1
18.2
18.2.1
18.2.2
18.3
18.3.1
18.3.2
18.3.3
18.4
19
20
21
PACKAGE OUTLINE
SOLDERING
TDA8922
Introduction
Through-hole mount packages
Soldering by dipping or by solder wave
Manual soldering
Surface mount packages
Reflow soldering
Wave soldering
Manual soldering
Suitability of IC packages for wave, reflow and
dipping soldering methods
DATA SHEET STATUS
DEFINITIONS
DISCLAIMERS
2003 Mar 20
2
Philips Semiconductors
Objective specification
2
×
25 W class-D power amplifier
1
FEATURES
2
APPLICATIONS
TDA8922
•
High efficiency (∼90%)
•
Operating supply voltage from
±12.5
to
±30
V
•
Very low quiescent current
•
Low distortion
•
Usable as a stereo Single-Ended (SE) amplifier or as a
mono amplifier in Bridge-Tied Load (BTL)
•
Fixed gain of 30 dB in Single-Ended (SE) and 36 dB in
Bridge-Tied Load (BTL)
•
High output power
•
Good ripple rejection
•
Internal switching frequency can be overruled by an
external clock
•
No switch-on or switch-off plop noise
•
Short-circuit proof across load and to supply lines
•
Electrostatic discharge protection
•
Thermally protected.
4
QUICK REFERENCE DATA
SYMBOL
General; V
P
=
±20
V
V
P
I
q(tot)
η
P
o
supply voltage
total quiescent supply no load connected
current
efficiency
PARAMETER
•
Television sets
•
Home-sound sets
•
Multimedia systems
•
All mains fed audio systems
•
Car audio (boosters).
3
GENERAL DESCRIPTION
The TDA8922 is a high efficiency class-D audio power
amplifier with very low dissipation. The typical output
power is 2
×
25 W.
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
±12.5
to
±30
V and
consumes a very low quiescent current.
CONDITIONS
MIN.
±12.5
−
−
22
22
TYP.
±20
55
90
MAX.
±30
75
−
−
−
−
UNIT
V
mA
%
P
o
= 25 W; SE: R
L
= 2
×
8
Ω;
f
i
= 1 kHz
R
L
= 8
Ω;
THD = 10%; V
P
=
±20
V; note 1
R
L
= 4
Ω;
THD = 10%; V
P
=
±15
V; note 1
Stereo single-ended configuration
output power
25
25
W
W
Mono bridge-tied load configuration
P
o
Note
1. See Section 16.5.
5
ORDERING INFORMATION
TYPE
NUMBER
TDA8922TH
TDA8922J
PACKAGE
NAME
HSOP24
DBS23P
DESCRIPTION
plastic, heatsink small outline package; 24 leads;
low stand-off height
plastic DIL-bent-SIL power package; 23 leads
(straight lead length 3.2 mm)
VERSION
SOT566-3
SOT411-1
output power
R
L
= 8
Ω;
THD = 10%; V
P
=
±15
V; note 1
46
50
W
2003 Mar 20
3
Philips Semiconductors
Objective specification
2
×
25 W class-D power amplifier
6
BLOCK DIAGRAM
TDA8922
handbook, full pagewidth
VDDA2
VDDA1
10 (4)
STABI PROT
18 (12)
13 (7)
RELEASE1
VDDP2
23 (16)
VDDP1
14 (8)
15 (9)
3 (20)
BOOT1
IN1−
IN1+
9 (3)
8 (2)
INPUT
STAGE
PWM
MODULATOR
CONTROL
AND
ENABLE1 HANDSHAKE
SWITCH1
DRIVER
HIGH
16 (10)
DRIVER
LOW
VSSP1
OUT1
SGND1
OSC
MODE
11 (5)
7 (1)
6 (23)
mute
STABI
OSCILLATOR
MODE
MANAGER
TEMPERATURE SENSOR
CURRENT PROTECTION
TDA8922TH
(TDA8922J)
VDDP2
22 (15)
BOOT2
SGND2
2 (19)
mute
ENABLE2
SWITCH2
INPUT
STAGE
PWM
MODULATOR
RELEASE2
CONTROL
AND
HANDSHAKE
DRIVER
HIGH
21 (14)
DRIVER
LOW
17 (11)
VSSP1
20 (13)
VSSP2
MGU994
IN2+
IN2−
5 (22)
4 (21)
OUT2
1 (18)
VSSA2
12 (6)
VSSA1
24 (17)
VSSD
19 (-)
HW
(1)
(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
7
PINNING
PIN
SYMBOL
TDA8922TH
V
SSA2
SGND2
V
DDA2
IN2−
IN2+
MODE
OSC
IN1+
IN1−
V
DDA1
SGND1
V
SSA1
PROT
V
DDP1
BOOT1
OUT1
V
SSP1
STABI
HW
V
SSP2
OUT2
BOOT2
V
DDP2
V
SSD
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
TDA8922J
18
19
20
21
22
23
1
2
3
4
5
6
7
8
9
10
11
12
−
13
14
15
16
17
negative analog supply voltage for channel 2
signal ground for channel 2
positive analog supply voltage for channel 2
negative audio input for channel 2
positive audio input for channel 2
mode selection input: standby, mute or operating
oscillator frequency adjustment or tracking input
positive audio input for channel 1
negative audio input for channel 1
positive analog supply voltage for channel 1
signal ground for channel 1
negative analog supply voltage for channel 1
time constant capacitor for protection delay
positive power supply voltage for channel 1
bootstrap capacitor for channel 1
PWM output from channel 1
negative power supply voltage for channel 1
decoupling of internal stabilizer for logic supply
handle wafer; must be connected to pin V
SSD
negative power supply voltage for channel 2
PWM output from channel 2
bootstrap capacitor for channel 2
positive power supply voltage for channel 2
negative digital supply voltage
DESCRIPTION
TDA8922
2003 Mar 20
5
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