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)
Comments
Post a Comment