TDA1521A is a dual hi-fi audio power amplifier from Philips Semiconductors. It has a power of 2 x 6 W and the following features: very few external components are required, input is muted during power on and off (no switch-on or switch-off clicks), low offset voltage between output and ground, excellent gain balance between channels, Hi-fi according to IEC 268 and DIN 45500 standards, short-circuit-proof and thermally protected.
The Philips TDA1521A is a dual hi-fi audio power amplifier encapsulated in a 9-lead plastic power package (SOT 110B). It is designed for mains-fed applications such as stereo TV sound and stereo radio, requiring very few external components. Key features include input muting during power-on and off to prevent clicks, low offset voltage, excellent gain balance, and short-circuit protection.
| Output power | 2 x 6 W |
|---|---|
| Supply voltage range | +7,5 to +21,0 V |
| Voltage gain | 30 dB |
| Gain balance | 0,2 dB |
| Ripple rejection | 60 dB |
| Channel separation | 70 dB |
| Noise output voltage | 70 µV |
| Package type | 9-lead plastic power |
The device delivers 2 x 6 W into an 8 Ω load with a THD of 0.5%.
Yes, it features an input mute circuit that suppresses unwanted input signals during switching on and off.
The maximum junction temperature is 150 °C.