TDA8931 Datasheet, PDF (1/31 Pages) NXP Semiconductors – Power comparator 1 X 20 W

TDA8931
Power comparator 1 × 20 W
Rev. 01 — 14 January 2004
Preliminary data sheet
1. General description
The TDA8931 is a switching power stage for high efficiency class-D audio power amplifier
systems.
It contains a Single-Ended (SE) power stage, drive logic, protection control logic, a full
differential input comparator and a HVP charger to charge the SE capacitor. With this
amplifier a compact 1 × 20 W closed loop self-oscillating digital amplifier system can be
built. The TDA8931 has a high efficiency so that a heat sink is not required up to
20 W (RMS). The system operates on an asymmetrical and a symmetrical supply voltage.
2. Features
s High efficiency
s Operating voltage asymmetrical from 12 V to 35 V
s Operating voltage symmetrical from ±6 V to ±17.5 V
s Thermally protected
s No heat sink required
s Charger for single-ended capacitor
s No pop sound
3. Applications
s Flat panel television sets
s Flat panel monitors
s Multimedia systems
s Wireless speakers
s Micro systems
4. Quick reference data
Table 1: Quick reference data
Symbol Parameter
Conditions
General
V_P
operating supply
voltage
asymmetrical
symmetrical
I_q
I_stb
I_sleep
quiescent current
standby current
sleep current
Operating mode; V_P = 22 V
Standby mode; V_P = 22 V
Sleep mode; V_P = 22 V
Min Typ Max Unit
12 22 35 V
±6 ±11 ±17.5 V
-
20 30 mA
-
10 15 mA
-
100 200 µA