参数资料
型号: TDA8933BTW
厂商: NXP SEMICONDUCTORS
元件分类: 音频/视频放大
英文描述: Class D Audio Amplifier
中文描述: 20.6 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO32
封装: 6.10 MM, 0.65 MM PITCH, PLASTIC, SOT-249-1, HTSSOP-32
文件页数: 4/42页
文件大小: 245K
代理商: TDA8933BTW
TDA8933B_1
NXP B.V. 2008. All rights reserved.
Preliminary data sheet
Rev. 01 — 23 October 2008
12 of 42
NXP Semiconductors
TDA8933B
Class D audio amplier
8.7 Output voltage buffers
When pin POWERUP is set HIGH the half-supply output voltage buffers are switched on
in asymmetrical conguration. 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.
Internal circuitry
Pin
Symbol
Equivalent circuit
1VSSD(HW)
16
17
32
2
IN1P
3
IN1N
12
INREF
14
IN2N
15
IN2P
001aad784
1, 16,
17, 32
VSSA
VDDA
001aad785
2 k
± 20 %
2 k
± 20 %
48 k
± 20 %
48 k
± 20 %
2, 15
12
3, 14
HVPREF
VDDA
VSSA
V/I
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