TFA9810
Stereo full-bridge audio amplifier 2 x 12 W
Rev. 02 — 30 August 2007
Preliminary data sheet
1. General description
The TFA9810 is a two-channel power comparator for high-efficiency class D audio
amplifier systems. It contains two full-bridge Bridge-Tied Load (BTL) power stages, drive
logic, protection control logic and full differential input comparators. By using this power
comparator a compact closed-loop self-oscillating digital amplifier system or open-loop
system can be built. The TFA9810 does not require a heat sink and operates using an
asymmetrical supply voltage.
2. Features
I
I
I
I
I
I
Stereo full-bridge power comparator for class D audio amplifier applications
No external heat sink required
Operating voltage range: asymmetrical from 8 V to 20 V
Thermally protected
Zero dead-time switching
Current-limiting (no audible interruptions)
3. Applications
I
I
I
I
I
I
Self-oscillating or open-loop class D audio amplifier applications
Flat-panel television sets
Flat-panel monitors
Multimedia systems
Wireless speakers
High-end CRT television sets
4. Quick reference data
Table 1.
Quick reference data
T
amb
= 25
°
C; V
P
= 12 V; f
osc
= 550 kHz;
unless otherwise specified
Symbol
V
P
I
off
I
q
η
po
Parameter
supply voltage
off-state current
quiescent current
output power
efficiency
Condition
V
P
= V
DDPx
−
V
SSPx
Off mode
With load, filter and
snubbers connected
Output power
2 x 9 W into 8
Ω;
P
o
= P
o(nom)
Min
8
-
-
87
Typ
12
110
35
89
Max
20
200
45
-
Unit
V
µA
mA
%
PHILIPS [ NXP SEMICONDUCTORS ]
