TDA8933B 查看數據表（PDF） - NXP Semiconductors.

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TDA8933B

Class-D audio amplifer

NXP Semiconductors. 

NXP Semiconductors

TDA8933B

Class D audio amplifier

8.7 Output voltage buffers

When pin POWERUP is set HIGH the half-supply output voltage buffers are switched on

in asymmetrical configuration. The start-up will then be pop-free because the device

starts switching when the capacitor on pin HVPREF and the SE capacitors are completely

charged.

Output voltage buffer pins:

• Pins HVP1 and HVP2: The time required for charging the SE capacitor depends on its

value. The half-supply voltage output is disabled when the TDA8933B is used in a

symmetrical supply application.

• Pin HVPREF: This output voltage reference buffer charges the capacitor on pin

HVPREF.

• Pin INREF: This output voltage reference buffer charges the input reference capacitor

on pin INREF, which applies the bias voltage for the inputs.

9. Internal circuitry

Table 7.

Pin

1

16

17

32

Internal circuitry

Symbol

Equivalent circuit

VSSD(HW)

1, 16,

17, 32

VDDA

VSSA

001aad784

2

IN1P

3

IN1N

12

INREF

2, 15

14

IN2N

15

IN2P

VDDA

2 kΩ

± 20 %

V/I

48 kΩ

± 20 %

12

3, 14

2 kΩ

± 20 %

48 kΩ

± 20 %

HVPREF

V/I

VSSA

001aad785

TDA8933B_1

Preliminary data sheet

Rev. 01 — 23 October 2008

© NXP B.V. 2008. All rights reserved.

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