TDA8922 Datasheet, PDF (3/36 Pages) NXP Semiconductors – 2 x 25 W class-D power amplifier

Philips Semiconductors
2 × 25 W class-D power amplifier
Objective specification
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
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP. MAX. UNIT
General; V_P = ±20 V
V_P
I_q(tot)
supply voltage
total quiescent supply no load connected
current
±12.5 ±20 ±30 V
−
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
Note
1. See Section 16.5.
5 ORDERING INFORMATION
TYPE
NUMBER
TDA8922TH
TDA8922J
NAME
HSOP24
DBS23P
PACKAGE
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
2003 Mar 20
3