TEA2025D STMicroelectronics, TEA2025D Datasheet - Page 6

• Manufacturer Part Number: TEA2025D
• Description: IC AMP AUDIO PWR 4.7W AB 20SOIC
• Manufacturer: STMicroelectronics
• Type: Class ABr

Specifications of TEA2025D

• Output Type: 1-Channel (Mono) or 2-Channel (Stereo)
• Max Output Power X Channels @ Load: 4.7W x 1 @ 8 Ohm; 2.4W x 2 @ 8 Ohm
• Voltage - Supply: 3 V ~ 12 V
• Features: Depop, Thermal Protection
• Mounting Type: Surface Mount
• Package / Case: 20-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

TEA2025
Figure 12.
3.4 Output Capacitors.
The low cut off frequency due to output capacitor depending on the load is given by:
with C
3.5 Pop Noise
Most amplifiers similar to TEA 2025B need external resistors between DC outputs and ground in order to
optimize the pop on/off performance and crossover distortion.
Figure 13.
The TEA 2025B solution allows to save components because of such resistors (800 ohm)are included into
the chip.
3.6 Stability
A good layout is recommended in order to avoid oscillations.
Generally the designer must pay attention on the following points:
6/11
– Short wires of components and short connections.
– No ground loops.
– Bypass of supply voltage with capacitors as nearest as possible to the supply I.C.pin. The low val-
– No sockets.
ue(poliester)capacitors must have good temperature and frequency characteristics.
the heatsink can have a smaller factor of safety compared with that of a conventional circuit. There
is no device damage in the case of excessive junction temperature: all that happens is that PO (and
OUT
470mF and R
L
= 4 ohm it means F
L
= 80 Hz.
F
L
=
-----------------------------------
2ΠC
OUT
1
⋅
R
L