The TDA8933B is a high-efficiency class D amplifier with low power dissipation

TDA8933B

Manufacturer Part NumberTDA8933B
DescriptionThe TDA8933B is a high-efficiency class D amplifier with low power dissipation
ManufacturerNXP Semiconductors
TDA8933B datasheet
 
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NXP Semiconductors
R
= oscillator resistor ( ) (on pin OSCREF)
osc
Fig 4.
Table 5
For device synchronization see
Table 5.
Configuration
Master
Slave
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 (T
gain of the amplifier is decreased gradually to a level where the combination of
dissipation (P) and the thermal resistance from junction to ambient (R
junction temperature of around the threshold level.
TDA8933B_1
Preliminary data sheet
550
f
osc
(kHz)
450
350
250
25
30
Oscillation frequency as a function of R
summarizes how to configure the TDA8933B in master or slave configuration.
Section
Master or slave configuration
Pin
OSCREF
R
> 25 k to V
osc
SSD(HW)
R
= 0 ; shorted to V
osc
Rev. 01 — 23 October 2008
TDA8933B
Class D audio amplifier
010aaa531
35
40
45
R
(k )
osc
osc
14.6.
OSCIO
output
input
SSD(HW)
th(j-a)
> 140 C), the
j
) results in a
© NXP B.V. 2008. All rights reserved.
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