TDA8924 Datasheet, PDF (3/35 Pages) NXP Semiconductors – 2 x 120 W class-D power amplifier

Philips Semiconductors
2 × 120 W class-D power amplifier
Objective specification
TDA8924
1 FEATURES
• High efficiency (∼90 %)
• Operating voltage from ±12.5 V 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 28 dB in SE and 34 dB in 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 the load and to the 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 TDA8924 is a high efficiency class-D audio power
amplifier with very low dissipation. The typical output
power is 2 × 120 W.
The device comes in a HSOP24 power package with a
small internal heatsink. Depending on 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 V to ±30 V and consumes a very
low quiescent current.
4 QUICK REFERENCE DATA
SYMBOL
PARAMETER
CONDITIONS
MIN. TYP. MAX. UNIT
General; V_P = ±24 V
V_P
I_q(tot)
η
supply voltage
total quiescent current
efficiency
Stereo single-ended configuration
no load connected; note 1
P_o = 240 W BTL mode
±12.5 ±24 ±30 V
−
100 −
mA
−
83
−
%
P_o
output power
R_L = 2 Ω; THD = 10 %; V_P = ±24 V; note 2 −
120 −
W
Mono bridge-tied load configuration
P_o
output power
R_L = 4 Ω; THD = 10 %; note 2
V_P = ±24 V
V_P = ±20 V
−
240 −
W
−
175 −
W
Notes
1. Quiescent current in application; value strongly depends on circuitry connected to the output pin. This also means
that quiescent dissipation of the chip is lower than the V_P × I_q.
2. Output power is measured indirectly; based on R_DSon measurement.
5 ORDERING INFORMATION
TYPE
NUMBER
TDA8924TH
NAME
HSOP24
PACKAGE
DESCRIPTION
plastic thermal enhanced small outline package; 24 leads; low
stand-off height; heatsink
VERSION
SOT566-3
2003 Jul 28
3