TDA8933B NXP Semiconductors, TDA8933B Datasheet - Page 8

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

TDA8933B

Manufacturer Part Number
TDA8933B
Description
The TDA8933B is a high-efficiency class D amplifier with low power dissipation
Manufacturer
NXP Semiconductors
Datasheet
NXP Semiconductors
TDA8933B_1
Preliminary data sheet
8.4.1 Thermal Foldback (FT)
8.4 Protections
Table 5
For device synchronization see
Table 5.
The following protections are implemented in the TDA8933B:
The behavior of the device under the different fault conditions differs according to the
protection activated and is described in the following sections.
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.
Configuration
Master
Slave
Fig 4.
R
osc
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)
= oscillator resistor ( ) (on pin OSCREF)
summarizes how to configure the TDA8933B in master or slave configuration.
Oscillation frequency as a function of R
Master or slave configuration
Pin
OSCREF
R
R
(kHz)
f
osc
osc
Rev. 01 — 23 October 2008
osc
550
450
350
250
> 25 k to V
= 0 ; shorted to V
25
Section
30
SSD(HW)
14.6.
SSD(HW)
35
osc
40
R
OSCIO
output
input
010aaa531
osc
(k )
45
Class D audio amplifier
TDA8933B
th(j-a)
© NXP B.V. 2008. All rights reserved.
j
) results in a
> 140 C), the
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