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: 41/42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
8 of 42
NXP Semiconductors
TDA8933B
Class D audio amplier
Rosc = oscillator resistor () (on pin OSCREF)
Table 5 summarizes how to congure the TDA8933B in master or slave conguration.
For device synchronization see Section 14.6.
8.4 Protections
The following protections are implemented in the TDA8933B:
Thermal Foldback (TF)
OverTemperature Protection (OTP)
OverCurrent Protection (OCP)
Window Protection (WP)
Supply voltage protections
UnderVoltage Protection (UVP)
OverVoltage Protection (OVP)
UnBalance Protection (UBP)
Electro Static Discharge (ESD)
The behavior of the device under the different fault conditions differs according to the
protection activated and is described in the following sections.
8.4.1 Thermal Foldback (FT)
If the junction temperature of the TDA8933B exceeds the threshold level (Tj > 140 °C), the
gain of the amplier is decreased gradually to a level where the combination of
dissipation (P) and the thermal resistance from junction to ambient (Rth(j-a)) results in a
junction temperature of around the threshold level.
Fig 4.
Oscillation frequency as a function of Rosc
Table 5.
Master or slave conguration
Conguration
Pin
OSCREF
OSCIO
Master
Rosc > 25 k to VSSD(HW)
output
Slave
Rosc = 0 ; shorted to VSSD(HW)
input
350
450
550
fosc
(kHz)
250
Rosc (k)
25
45
40
30
35
010aaa531
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