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| TFA9815 Datasheet, PDF (1/26 Pages) NXP Semiconductors – Stereo full-bridge audio amplifier 2 x 17 W | |||
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TFA9815
Stereo full-bridge audio ampliï¬er 2 x 17 W
Rev. 01 â 16 December 2008
Preliminary data sheet
1. General description
The TFA9815 is a 2-channel power comparator for high-efï¬ciency class D audio ampliï¬er
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 audio ampliï¬er system or
open-loop system can be built. The continuous output power is 2 Ã17 W in a full-bridge
BTL application. The TFA9815 does not require a heat sink and operates using an
asymmetrical supply voltage.
2. Features
I Stereo full-bridge audio ampliï¬er for class D 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 ampliï¬er 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
VP = 12 V; fosc = 550 kHz; Tamb = 25 °C; typical application diagram Figure 12, unless otherwise
speciï¬ed.
Symbol Parameter
Conditions
Min Typ Max Unit
General
VP
supply voltage single, asymmetrical
supply (VDD - VSS)
IP
supply current Sleep mode
8
12
20
V
-
110 200 µA
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