TDA1562Q Audio Amplifier 50W

 TDA1562Q general description:

Philips designers have further improved a number of properties of the IC, among which the power output. According to the Philips datasheet, the improved device, the TDA1562Q, can deliver 70 watts into 4 ohms, but that is at the cost of the distortion, which at 10 per cent is rather too high, even for in a car. The prototype of the design described in this article provides 54 watts into 4 ohms at 1 per cent distortion. Since the number of requisite external components is smaller than in the case of the earlier device, the printed-circuit board is even more compact than that for the February 1995 amplifier.

 TDA1562Q features:

• Low power dissipation during reproduction of music signals
• Proof against short-circuits
• Protection against excessive temperatures
• Standby switch
• No power-on or power-off clicks
• Visible error indication
• Measurement results (at Ub=14.4 V)
• Supply voltage 8–18 V
• Sensitivity 760 mV r.m.s.
• Input impedance 70 kΩ
• Power output 54 W r.m.s. into 4 Ω (f=1 kHz; THD+N=1%)
• Harmonic distortion (THD+) at 1 W into 4 Ω: 0.046% (1 kHz)0.29% 20Hz) at 35 W into 4 Ω: 0.12% (1 kHz) 0.7% (20 kHz)
• Signal-to-noise ratio (with 1 W into 4 Ω) 88 dBA
• Power bandwidth 7.5 Hz – 185 kHz (at 25 W into 4 Ω)
• Quiescent current about 135 mA (‘on’)

TDA1562Q applications:

• Television sets
• Home-sound sets
• Multimedia systems
• All mains fed audio systems
• Car audio (boosters).

TDA1562Q amplifer diagram:

TDA1562Q pcb:

TDA1562Q part lists:

• R1= 1MΩ
• R2 = 4kΩ7
• R3 = 1kΩ
• R4 = 100kΩ
• Capacitors:
• C1,C2 = 470nF
• C3,C4 = 10µF 63V radial
• C5,C6,C8 = 4700µF 25V radial
• (18mm max. dia., raster 7.5 mm)
• C7 = 100nF, raster 5 mm
• Semiconductors:
• D1 = high-efficiency-LED
• IC1 = TDA1562Q (Philips)
• Miscellaneous:
• S1 = single-pole on/off switch
• Four spade connectors, PCB mount
• Heatsink for IC1 (Rth<2.5 K/W)
• PCB, order code 000004-1 (see Readers Services pages)