Philips TDA8922, Техническое описание

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2003 Mar 20 3
Philips Semiconductors Objective specification
2
×
25 W class-D power amplifier TDA8922
1 FEATURES
•
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.
2 APPLICATIONS
•
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.
4 QUICK REFERENCE DATA
Note
1. See Section 16.5.
5 ORDERING INFORMATION
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
η
efficiency P
o
= 25 W; SE: R
L
= 2
×
8
Ω
; f
i
= 1 kHz
−
90
−
%
Stereo single-ended configuration
P
o
output power R
L
= 8
Ω
; THD = 10%; V
P
=
±
20 V; note 1 22 25
−
W
R
L
= 4
Ω
; THD = 10%; V
P
=
±
15 V; note 1 22 25
−
W
Mono bridge-tied load configuration
P
o
output power R
L
= 8
Ω
; THD = 10%; V
P
=
±
15 V; note 1 46 50
−
W
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