TFA9810_08 Datasheet, PDF (1/29 Pages) NXP Semiconductors – Stereo full-bridge audio amplifier 2 x 12 W

TFA9810
Stereo full-bridge audio amplifier 2 x 12 W
Rev. 03 — 20 February 2008
Product 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 Stereo full-bridge power comparator for class D audio amplifier applications
I No external heat sink required
I Operating voltage range: asymmetrical from 8 V to 20 V
I Thermally protected
I Zero dead-time switching
I Current-limiting (no audible interruptions)
3. Applications
I Self-oscillating or open-loop class D audio amplifier applications
I Flat-panel television sets
I Flat-panel monitors
I Multimedia systems
I Wireless speakers
I 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; Figure 33 unless otherwise specified
Symbol
Parameter
Condition
Min Typ
V_P
supply voltage
V_P = V_DDPx − V_SSPx
8
12
I_off
off-state current
off mode
-
110
I_q
quiescent current with load, filter and
-
35
snubbers connected
η_po
output power
output power
efficiency
2 x 9 W into 8 Ω;
P_o = P_o(nom)
87 89
Max Unit
20 V
200 µA
45 mA
-
%