TDA8933 Datasheet, PDF (9/47 Pages) NXP Semiconductors – Class-D audio amplifier

NXP Semiconductors
f _osc = ¹----²---^.-^4R---⁵-_o---_s^x--_c-¹---⁰---⁹
Where:
f_osc = oscillator frequency (Hz)
R_osc = oscillator resistor (Ω) (on pin OSCREF)
550
f_osc
(kHz)
450
TDA8933
Class-D audio amplifier
(1)
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350
250
25
30
35
40
45
Rosc (kΩ)
Fig 4. Oscillation frequency as a function of R_osc
Table 5 summarizes how to configure the TDA8933 in master or slave configuration.
Table 5. Master/slave configuration
Configuration
Pin
OSCREF
Master
Slave
R_osc > 25 kΩ to V_SSD(HW)
R_osc = 0 Ω; shorted to V_SSD(HW)
OSCIO
output
input
8.4 Protections
The following protections are implemented in the TDA8933:
• Thermal Foldback (TF)
• OverTemperature Protection (OTP)
• OverCurrent Protection (OCP)
• Window Protection (WP)
• Supply voltage protections
– UnderVoltage Protection (UVP)
– OverVoltage Protection (OVP)
– UnBalance Protection (UBP)
• ElectroStatic 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.
TDA8933_1
Preliminary data sheet
Rev. 01 — 15 May 2007
© NXP B.V. 2007. All rights reserved.
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