TDA7493 STMicroelectronics, TDA7493 Datasheet - Page 17

• Manufacturer Part Number: TDA7493
• Description: Audio Amplifiers 3W + 3W Dual BTL Class-D 4-Select dB
• Manufacturer: STMicroelectronics

Specifications of TDA7493

• Amplifier Class: D
• No. Of Channels: 2
• Output Power: 3W
• Supply Voltage Range: 3V To 5.5V
• Thd + N: 0.05% @ 0.5W, 4ohm, VCC=5V
• Load Impedance: 4ohm
• Operating Temperature Range: 0°C To +70°C
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

TDA7493
5.7
5.8
Protection function
The TDA7493 has four types of protection: overvoltage (OV), undervoltage (UV), thermal
(OT) and short circuit (SC):
When any of the above protection becomes active, the output goes to a high-impedance
state. The device remains in this state until the condition is cleared or rectified, when the
circuit restarts again.
Differential input
The TDA7493 can be used with either differential or single-ended inputs. In either case, the
device must be AC coupled to the audio source.
To use the device with a differential source, connect the positive lead from the audio source
to the INP input and the negative lead to the INN input as shown in
differential input stage of the amplifier minimizes the common mode noise effectively.
In the differential input application:
Typically, Rin = 30 k
Figure 11. Differential input application
overvoltage protection (OVP) for the supply V
undervoltage protection (UVP) for the supply V
thermal protection (OTP) for the junction temperature Tj > 155 °C
short-circuit protection (SCP) across the load (tested at V
input impedance is given by 2 * Rin,
cut-off frequency of the input filter is given by
f
c
= 1 / (2 *
π
* Cin / 2 * 2 * Rin) = 1 / (2 *
Ω
and Cin > 330 nF to get a cut-off frequency less than 20 Hz.
OUTP
OUTN
Doc ID 14570 Rev 5
Cin
Cin
INN
π
INP
* Cin * Rin).
CC
CC
> 6 V
< 3 V
Rin
Rin
TDA7493
Input stage
CC
= 5.0 V).
+
Rfb
Rfb
Application information
-
Figure
11. The
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