ZXCD1010 View Datasheet(PDF) - Zetex => Diodes

Part Name

Description

Manufacturer

ZXCD1010

HIGH FIDELITY CLASS D AUDIO AMPLIFIER SOLUTION

Zetex => Diodes 

ZXCD1010

Higher Power Solutions

With some modifications the applications solutions

can be extended to give output power up to 100W. The

main differences being the supply voltage, the TO220

MOSFETs (ZXM64N035L3 and ZXM64P035L3), and the

output magnetics. The magnetics for 100W are

necessarily larger than required for 25W in order to

handle the higher load currents. For 100W operation

the supply voltage to the circuit is nominally 35V with a

4⍀ load.

Package details

The ZXCD1010 is available in a 16 pin exposed pad

QSOP package. The exposed pad on the underside of

the package should be soldered down to an area of

copper on the PCB, to function as a heatsink. The PCB

should have plated through vias to the underside of the

board, again connecting to an area of copper.

The ZXCD1010 class D controller IC is inherently

capable of driving even higher power solutions, with

the appropriate external circuitry. However the

maximum supply voltage to the ZXCD1010 class D

controller IC is 18V so the higher supply voltages must

therefore be dropped. Also due consideration must be

given to the ZXCD1010 output drive levels and the

characteristics of the bridge MOSFET’s. The latter must

be sufficiently enhanced by the OutA and OutB outputs

to ensure the filter and load network is driven properly.

If the gate drive of the ZXCD1010 is too low for the

chosen MOSFET then the OUTA and OUTB signal must

be buffered using an appropriate MOSFET driver

circuit. Additionally, suitable magnetics are essential

to achieve good THD performance.

ISSUE 3 - NOVEMBER 2003

9

SEMICONDUCTORS

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