TDA8922C
2
×
75 W class-D power amplifier
Rev. 01 — 7 September 2009
Product data sheet
1. General description
The TDA8922C is a high-efficiency Class D audio power amplifier. Typical output power is
2
×
75 W with a speaker load impedance of 6
Ω.
The TDA8922C is available in both HSOP24 and DBS23P power packages. The amplifier
operates over a wide supply voltage range from
±12.5
V to
±32.5
V and features low
quiescent current consumption.
2. Features
I
Pin compatible with TDA8950/20C for both HSOP24 and DBS23P packages
I
Symmetrical operating supply voltage range from
±12.5
V to
±32.5
V
I
Stereo full differential inputs, can be used as stereo Single-Ended (SE) or mono
Bridge-Tied Load (BTL) amplifier
I
High output power in typical applications:
N
SE 2
×
75 W, R
L
= 6
Ω
(V
DD
= 30 V; V
SS
=
−30
V)
N
SE 2
×
60 W, R
L
= 8
Ω
(V
DD
= 30 V; V
SS
=
−30
V)
N
BTL 1
×
155 W, R
L
= 8
Ω
(V
DD
= 25 V; V
SS
=
−25
V)
I
Low noise
I
Smooth pop noise-free start-up and switch off
I
Zero dead time switching
I
Fixed frequency
I
Internal or external clock
I
High efficiency
I
Low quiescent current
I
Advanced protection strategy: voltage protection and output current limiting
I
Thermal FoldBack (TFB)
I
Fixed gain of 30 dB in SE and 36 dB in BTL applications
I
Fully short-circuit proof across load
I
BD modulation in BTL configuration
3. Applications
I
I
I
I
DVD
Mini and micro receiver
Home Theater In A Box (HTIAB) system
High-power speaker system
NXP Semiconductors
TDA8922C
2
×
75 W class-D power amplifier
4. Quick reference data
Table 1.
General
V
DD
V
SS
V
th(ovp)
I
q(tot)
supply voltage
negative supply voltage
Operating mode
Operating mode
[1]
[2]
Quick reference data
Conditions
Min
12.5
65
-
Typ
30
-
40
Max
32.5
70
70
Unit
V
V
mA
Symbol Parameter
−12.5 −30
−32.5
V
overvoltage protection threshold V
DD
−
V
SS
voltage
total quiescent current
Operating mode; no load; no filter;
no RC-snubber network connected
T
j
= 85
°C;
L
LC
= 22
µH;
C
LC
= 680 nF (see
Figure 10);
R
L
= 6
Ω;
THD + N = 10 %;
V
DD
= 30 V; V
SS
=
−30
V
T
j
= 85
°C;
L
LC
= 22
µH;
C
LC
= 680 nF (see
Figure 10);
R
L
= 8
Ω;
THD + N = 10 %;
V
DD
= 25 V; V
SS
=
−25
V
[3]
Stereo single-ended configuration
P
o
output power
-
75
-
W
Mono bridge-tied load configuration
P
o
output power
[3]
-
155
-
W
[1]
[2]
[3]
V
DD
is the supply voltage on pins VDDP1, VDDP2 and VDDA.
V
SS
is the supply voltage on pins VSSP1, VSSP2, VSSA and VSSD.
Output power is measured indirectly; based on R
DSon
measurement; see
Section 13.3.
5. Ordering information
Table 2.
Ordering information
Package
Name
TDA8922CJ
TDA8922CTH
DBS23P
HSOP24
Description
plastic, heatsink small outline package; 24 leads; low stand-off height
Version
SOT566-3
plastic DIL-bent-SIL power package; 23 leads (straight lead length 3.2 mm) SOT411-1
Type number
TDA8922C_1
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 01 — 7 September 2009
2 of 40
NXP Semiconductors
TDA8922C
2
×
75 W class-D power amplifier
6. Block diagram
VDDA
3 (20)
n.c.
10 (4)
STABI PROT
18 (12)
13 (7)
VDDP2
23 (16)
VDDP1
14 (8)
15 (9)
BOOT1
IN1M
IN1P
9 (3)
8 (2)
INPUT
STAGE
PWM
MODULATOR
SWITCH1
CONTROL
AND
HANDSHAKE
DRIVER
HIGH
16 (10)
DRIVER
LOW
V
SSP1
OSCILLATOR
MODE
MANAGER
TEMPERATURE SENSOR
CURRENT PROTECTION
VOLTAGE PROTECTION
OUT1
n.c.
OSC
MODE
11 (5)
7 (1)
6 (23)
mute
STABI
TDA8922CTH
(TDA8922CJ)
V
DDP2
22 (15)
BOOT2
SGND
2 (19)
mute
CONTROL
AND
HANDSHAKE
DRIVER
HIGH
21 (14)
DRIVER
LOW
17 (11)
20 (13)
OUT2
IN2P
IN2M
5 (22)
4 (21)
INPUT
STAGE
PWM
MODULATOR
SWITCH2
1 (18)
12 (6)
24 (17)
19 (-)
010aaa549
VSSA
n.c.
VSSD
n.c.
VSSP1
VSSP2
Pin numbers in brackets refer to type number TDA8922CJ.
Fig 1.
Block diagram
TDA8922C_1
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 01 — 7 September 2009
3 of 40
NXP Semiconductors
TDA8922C
2
×
75 W class-D power amplifier
7. Pinning information
7.1 Pinning
OSC
IN1P
IN1M
n.c.
n.c.
n.c.
PROT
VDDP1
BOOT1
1
2
3
4
5
6
7
8
9
OUT1 10
VSSP1 11
VSSD 24
VDDP2 23
BOOT2 22
OUT2 21
VSSP2 20
n.c. 19
STABI 18
VSSP1 17
OUT1 16
BOOT1 15
VDDP1 14
PROT 13
010aaa546
1
2
3
4
5
VSSA
SGND
VDDA
IN2M
IN2P
MODE
OSC
IN1P
IN1M
STABI 12
VSSP2 13
OUT2 14
BOOT2 15
VDDP2 16
VSSD 17
VSSA 18
SGND 19
VDDA 20
IN2M 21
IN2P 22
MODE 23
TDA8922CJ
TDA8922CTH
6
7
8
9
10 n.c.
11 n.c.
12 n.c.
010aaa547
Fig 2.
Pin configuration TDA8922CTH
Fig 3.
Pin configuration TDA8922CJ
TDA8922C_1
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 01 — 7 September 2009
4 of 40
NXP Semiconductors
TDA8922C
2
×
75 W class-D power amplifier
7.2 Pin description
Table 3.
Symbol
VSSA
SGND
VDDA
IN2M
IN2P
MODE
OSC
IN1P
IN1M
n.c.
n.c.
n.c.
PROT
VDDP1
BOOT1
OUT1
VSSP1
STABI
n.c.
VSSP2
OUT2
BOOT2
VDDP2
VSSD
Pin description
Pin
TDA8922CTH
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
TDA8922CJ
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
signal ground
positive analog supply voltage
channel 2 negative audio input
channel 2 positive audio input
mode selection input: Standby, Mute or Operating
mode
oscillator frequency adjustment or tracking input
channel 1 positive audio input
channel 1 negative audio input
not connected
not connected
not connected
decoupling capacitor for protection (OCP)
channel 1 positive power supply voltage
channel 1 bootstrap capacitor
channel 1 PWM output
channel 1 negative power supply voltage
decoupling of internal stabilizer for logic supply
not connected
channel 2 negative power supply voltage
channel 2 PWM output
channel 2 bootstrap capacitor
channel 2 positive power supply voltage
negative digital supply voltage
Description
8. Functional description
8.1 General
The TDA8922C is a two-channel audio power amplifier that uses Class D technology.
For each channel, the audio input signal is converted into a digital Pulse Width Modulation
(PWM) signal using an analog input stage and a PWM modulator; see
Figure 1.
To drive
the output power transistors, the digital PWM signal is fed to a control and handshake
block and to high- and low-side driver circuits. This level-shifts the low-power digital PWM
signal from a logic level to a high-power PWM signal switching between the main supply
lines.
A second order low-pass filter converts the PWM signal to an analog audio signal that can
be used to drive a loudspeaker.
TDA8922C_1
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 01 — 7 September 2009
5 of 40
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