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EN 42
9.
Module PWR 04-01 Non-Wireless (For Information Only)
1
Overview - introduction
This wireless audio amplifi er is a Stereo 2 x 50 Watt class D amplifi er for use in Wireless Audio Sets. The FR4 PCB is build up with
through hole components and SMD 0603, 0805 components. Volumecontrol is done with a unidirectional serial signal from the receiver
towards the M62429 volumechip. A black extruded AL heatsink (4°C/W) is mounted on the amplifi erchip with 2 screws. On board is
also all conditioning for the wireless receivermodule from Freesystems. Power supply and interfacing from / to the receiver is done with
a 16 pole FFC fl exlink. Also on board are 2 LEDS to indicate the operating condition of the amplifi er.
2
Electrical specifi cation
Rated Power
Sensitivity (2 x 50 W)
THD
Frequency response
Phase
Typical DC – supply
Load output
Mute input
Standby input
Leds
Standby output to SMPS
Input impedance
Output of amplifi er is short circuit proof
No audible plops at power on or power down
Operating temperature:
Storage temperature
Pcb material
PB – free components and full pB free processing
3
Key components
class D amplifi er: TDA8920BTH / Philips Semiconductor
outputfi lter: 22μH / 470nF polyester
Conditioning preamp: NJM4560 / JRC
Volumechip: M62429 / Renesas – Mitsubishi
3V3 regulator: MC78FC33 / Motorola
Connectors : all JST except speakerconnector
Output to speakers: Easyconnector LQR3215-0102F / SMK
Exploded View & Module PWR 04-01 Non-Wireless
HTS5000W
2 x 50W in 6 Ohm @ 10%THD maximum (FTC)
0.5 V RMS input for 50Watt into 6 ohm / see annex 1: FTC - power
<0.1% at 1/8 P rated ( each channel separately measured)
fl at between 30Hz - 20kHz // +/- 1 dB
Input and output in phase
+ 27 VDC / -27 VDC & 6VDC
6 ohm - Both channels should be loaded with 6 ohms to avoid
audioholes
Active low
Active low
Green = playmode or muted // red is standbymode
active high (6V unloaded) = SMPS in standbymode
< 20K ohm both channels
0 to + 45 °C
-25 to + 80 °C
FR4 / 2 layers / 0603, 0805 & through hole / Dimensions 90 x 100 mm
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