NXP Semiconductors TFA9810 Instrukcja Użytkownika Pobierz pdf

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

n Stereo full-bridge power comparator for class D audio ampliﬁer applications

n No external heat sink required

n Operating voltage range: asymmetrical from 8 V to 20 V

n Thermally protected

n Zero dead-time switching

n Current-limiting (no audible interruptions)

3. Applications

n Self-oscillating or open-loop class D audio ampliﬁer applications

n Flat-panel television sets

n Flat-panel monitors

n Multimedia systems

n Wireless speakers

n High-end CRT television sets

4. Quick reference data

TFA9810

Stereo full-bridge audio ampliﬁer 2 x 12 W

Rev. 03 — 20 February 2008 Product data sheet

Table 1. Quick reference data

amb

= 25

C; V

= 12 V; f

osc

= 550 kHz; Figure 33 unless otherwise speciﬁed

Symbol Parameter Condition Min Typ Max Unit

supply voltage V

= V

DDPx

− V

SSPx

81220V

off

off-state current off mode - 110 200 µA

quiescent current with load, ﬁlter and

snubbers connected

-3545mA

output power

efﬁciency

output power

2 x 9 W into 8 Ω;

o(nom)

87 89 - %

1 2 3 4 5 6 ... 28 29

Podsumowanie treści

Strona 1 - 4. Quick reference data

1. General descriptionThe TFA9810 is a two-channel power comparator for high-efﬁciency class D audioampliﬁer systems. It contains two full-bridge Brid

Strona 2 - 5. Ordering information

Strona 3 - 6. Block diagram

Strona 4 - 7. Pinning information

Strona 5 - 8. Functional description

Strona 6 - ENABLE > 3 V OPERATING

Strona 7 - • Window Protection (WP)

Strona 8 - 9. Internal circuitry

Strona 9

Strona 10 - NXP Semiconductors

Strona 11

Strona 12

Strona 13

Strona 14 - 10. Limiting values

Strona 15 - 12. Characteristics

Strona 16 - 12.2 Dynamic characteristics

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Strona 17

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Strona 18 - 14. Application information

Strona 19 - 14.2 Output current limiting

Strona 20 - 010aaa021

Strona 21

Strona 22

Strona 23

Strona 24

Strona 25 - 15. Test information

Strona 26 - 16. Package outline

Strona 27 - 17. Revision history

Strona 28 - 19. Contact information

Strona 29 - 20. Contents