ZXCD100MOEVAL ZETEX | Alldatasheet

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Technical content

DESCRIPTION

The ZXCD100MOEVAL evaluation board is based on the ZXCD1000 Class D audio amplifier solution from Zetex. This board allows the user to evaluate the high fidelity audio performance offered by the Zetex solution, with an output power upto 100W into 4/H9024. INTRODUCTION The ZXCD100MOEVAL is a 100W RMS (4/H9024Load) high performance class D amplifier. The circuitry contains MOSFET devices and should therefore be handled appropriately. The board requires a single rail power supply of 13 volts minimum and 35 volts maximum. Voltages in excess of 35 volts may cause permanent damage to the board. The heart of the solution is the ZXCD1000 class D controller IC and the user should refer to the ZXCD1000 data sheet for further technical information. The circuit features pop suppression and over current protection.

FEATURES

  • Class D architecture
  • Single power supply
  • Output power ( Vsupply = 35V)

100 W into 4/H9024

  • THD + N <0.8% @ 90% power
  • >90% efficiency
  • Flat frequency response 20Hz – 20 kHz
  • Turn on / turn off pop suppression
  • Over current protection
  • Noise floor –115dB Note: The ZXCD100MOEVAL is intended as an evaluation platform for Zetex Class D solutions. Zetex accepts no liability for external equipment connected to the ZXCD100MOEVAL or any other form of consequential damage or loss. ZXCD100MOEVAL ISSUE 2 - JULY 2002 100W CLASS D AUDIO AMPLIFIER EVALUATION BOARD

The following PCB image shows the connections required for correct operation of the ZXCD100MOEVAL board. Simple connector blocks are provided to enable easy connection of the supply voltage, audio input and speaker output. Power connection The ZXCD100MOEVAL requires a single positive supply voltage: 35V @ approximately 3.3A for 100W in 4/H9024 The supply should not exceed 35V and must not be less than 13V to ensure correct operation of the amplifier, Ensure the correct polarity of the supply is applied. Audio input The ZXCD100MOEVAL requires a single ended audio input as follows: The input impedance is 18k/H9024 Input signal amplitude required for full output power is approximately 2.5V peak to peak. Speaker connection A4 /H9024speaker may be connected to the board as shown. If this board is being used as part of a multi-channel solution the ensure the correct polarity connection of the speaker to avoid phasing errors. EVALUATION BOARD DESCRIPTION AND OPERATION The top copper, bottom copper and silk screen ID overlay are shown in figures 1,2 and 3. The ZXCD1000 is available in a 16-pin exposed pad QSOP package. The exposed pad on the underside of the package is soldered down to an area of copper on the PCB, to function as a heat sink. To further assist heat dissipation, the PCB has plated through vias connecting to an area of copper on the underside of the board. The MOSFETs required on the board are Zetex ZXM64 series HDMOS parts. These TO220 parts are required to handle the power dissipation in the amplifier with a 100W load. The output bridge is approximately 90% efficient, leaving in the region of 2.5W per MOSFET at full power. Heat sinks are provided on the board to enable this dissipation with a minimised temperature rise. The regulator transistor on the board is a TIP120, TO220 device. This device is required to supply the 12V rail to the board with its input voltage being the 35V bridge supply. A heat sink is attached to the transistor to enable good dissipation of the heat generated in this device. The inductors in place on the board have been selected for their excellent linearity and low losses. These components ensure minimal distortion is introduced in the recovered audio signal across the full power band. ZXCD100MOEVAL ISSUE 2 - JULY 2002 Audio Input Speaker Connection Power Connection

The speaker is connected as a Bridge Tied Load (BTL). This means that both sides of the speaker are driven from the Output Bridge and therefore neither side of the speaker connects to ground. This allows maximum power to be delivered to the load, from a given supply voltage. If it is wished to view or measure the signal across the load, a floating monitor must be used - for example a differential probe. Alternatively this may be achieved with a two channel oscilloscope monitoring the speaker A and speaker B outputs, and using the invert and add functions. For diagnostic purposes, the speaker outputs can be monitored single-ended with respect to ground with an oscilloscope (or other instrument) if desired. However any results obtained in this manner, are not valid for assessing performance. The true performance depends upon some differential cancellation across the speaker load. The board requires an input signal of 2.5V peak to peak nominal to yield the full output power. The input impedance of the board is nominally 18k /H9024. This may attenuate the source voltage and may need to be allowed for, depending on the output impedance of the source. The maximum supply voltage to the ZXCD100MOEVAL evaluation board is 35V nominal. A supply voltage of 35V will achieve 100W into a 4/H9024load. With the suggested heat sinking in place this board can easily operate with a full 100W output for extended periods. The full power output voltage across the (bridge tied) load will be approximately 60V peak to peak with a supply voltage of 35V. Viewing outputs single-ended will yield half these voltages. Smaller input voltages will yield smaller output voltages. ZXCD100MOEVAL ISSUE 2 - JULY 2002 Fig.1. Component Overlay Fig.2. Top Copper Fig.3. Bottom Copper

ZXCD100MOEVAL CIRCUIT DESCRIPTION. figure 4. The circuit consists of a voltage regulator, an and speaker to ground shorts. typically at 1W 1kHz, distortion is 0.4%. to any potentially hazardous equipment.

ZETEX CLASS D 100W MONO BOARD BOM (Manufactures names and series numbers are given for component specification guidance only) PCB ID Value Case Notes Resistors :- R1 11k SMD 0805 5% 0.1w R2 47k SMD 0805 5% 0.1w R3 56R SMD 0805 5% 0.1w R4 47k SMD 0805 5% 0.1w R5 56R SMD 0805 5% 0.1w R6 47k SMD 0805 5% 0.1w R7 56R SMD 0805 5% 0.1w R8 56R SMD 0805 5% 0.1w R9 47k SMD 0805 5% 0.1w R10 22k SMD 0805 5% 0.1w R11 5k6 SMD 0805 5% 0.1w R12 5k6 SMD 0805 5% 0.1w R13 22k SMD 0805 5% 0.1w R14 22k SMD 0805 5% 0.1w R15 390R SMD 0805 5% 0.1w R16 390R SMD 0805 5% 0.1w R17 - Not Used R18 5k6 SMD 0805 5% 0.1w R19 11k SMD 0805 5% 0.1w Optional trim component R20 10K SMD 3mm Pot Optional trim component Meggitt 3203 series R21 62k SMD 0805 5% 0.1w Optional trim component R22 100k SMD 0805 5% 0.1w R23 100k SMD 0805 5% 0.1w R24 100k SMD 0805 5% 0.1w R25 18k SMD 0805 5% 0.1w R26 820R SMD 0805 5% 0.1w R27 33k SMD 0805 5% 0.1w R28 0.01 /H9024 Open Air Welwyn OARS series R29 100k SMD 0805 5% 0.1w R30 82k SMD 0805 5% 0.1w R31 Not Used R32 Not Used R33 Not Used R34 Not Used Capacitors :- (The following Capacitor voltage ratings should be as specified or greater) (Electrolytic, COG, X7R and polyester refer to the dielectric material) (A more stable dielectric may be used as an alternative to that specified in all cases) (TH 105C = Through - hole radial, max operating temp. 105 deg.C) C1 47pF COG 16V SMD 0805 C2 22 /H9262F 16V Elect. /H1100620% TH 105C 7mmHx5mmDx2mmP Multicomp MCMHR series C3 22 /H9262F 16V Elect. /H1100620% TH 105C 7mmHx5mmDx2mmP Multicomp MCMHR series C4 47n X7R 16V SMD 0805 C5 47n X7R 16V SMD 0805 C6 330pF COG / NPO 16V SMD 0805 C7 22 /H9262F 16V Elect. /H1100620% TH 105C 7mmHx5mmDx2mmP Multicomp MCMHR series C8 6n8 X7R 16V SMD 0805 C9 6n8 X7R 16V SMD 0805 C10 22 /H9262F 16V Elect. /H1100620% TH 105C 7mmHx5mmDx2mmP Multicomp MCMHR series C11 100n X7R 25V SMD 0805 C12 100n X7R 25V SMD 0805 C13 100n X7R 25V SMD 0805 C14 22 /H9262F 16V Elect. /H1100620% TH 105C 7mmHx5mmDx2mmP Multicomp MCMHR series C15 22 /H9262F 16V Elect. /H1100620% TH 105C 7mmHx5mmDx2mmP Multicomp MCMHR series C16 100 /H9262F 16V Elect/H1100620% TH 105C 11mmHx6.3mmDx2.5mmP Rubycon YXF series Low imp C17 1 /H9262F 63V 5mm pitch Polyester C18 1 /H9262F 63V 5mm pitch Polyester ZXCD100MOEVAL ISSUE 2 - JULY 2002

Capacitors cont. :- C19 1 /H9262F 63V 5mm pitch Polyester C20 1 /H9262F 63V 5mm pitch Polyester C21 100nF X7R 25V SMD 0805 C22 22 /H9262F 16V Elect. /H1100620% TH 105C 7mmHx5mmDx2mmP Multicomp MCMHR series C23 1 /H9262F 63V 5mm pitch Polyester C24 1 /H9262F 63V 5mm pitch Polyester C25 100n 50V X7R SMD 0805 C26 220 /H9262F 25V Elect /H1100620% 3.5mmP C27 470n 50V X7R SMD 1812 C28 470n 50V X7R SMD 1812 C29 2200 /H9262F 50V Elect. /H1100620% TH 105C 35.5mmHx18mmDx7.5mmP Panasonic FC series Low imp. C30 220n 50V X7R SMD 0805 C31 100n 50V X7R SMD 0805 C32 100 /H9262F 50V Elect /H1100620% TH 105C 11.5mmHx8mmDx3.5mmP Rubycon ZL series Low imp. C33 100n 50V X7R SMD 0805 C34 22 /H9262F 16V Elect. /H1100620% 3.5mmP C35 1nF 16V X7R SMD 0805 C36 - Not Used C37 100n 16V X7R SMD 0805 Integrated Circuits :- U1 ZXCD1000 QSOP16 (Exposed Pad) U2 NE5532 SMD SO8 Transistors :- Q1 ZXM64N035L3 TO220 Q2 ZXM64P035L3 TO220 Q3 ZXM64P035L3 TO220 Q4 ZXM64N035L3 TO220 Q5 TIP120 TO220 Q6 FMMT591A SMD SOT23 Q7 ZVN3306 SMD SOT23 Q8 FMMT591A SMD SOT23 Q9 FMMT591A SMD SOT23 Q10 ZXM64P035G TO220 Diodes :- D1 BAS16 SMD SOT23 D2 BAS16 SMD SOT23 D3 BAS16 SMD SOT23 D4 BAS16 SMD SOT23 D5 BAV70 SMD SOT23 Double Diode D6 BAS16 SMD SOT23 ZD1 BZX84C10 SMD SOT23 10V Zener diode ZD2 BZX84C10 SMD SOT23 10V Zener diode ZD3 BZX84C10 SMD SOT23 10V Zener diode ZD4 BZX84C10 SMD SOT23 10V Zener diode ZD5 BZX84C13 SMD SOT23 13V Zener diode Inductors :- L1 PG0058 (Pulse) 20 /H9262H 100W inductor 555-8820-20(Cambion) 20/H9262H 100W inductor L2 PG0058 (Pulse) 20 /H9262H 100W inductor 555-8820-20(Cambion) 20/H9262H 100W inductor ZXCD100MOEVAL ISSUE 2 - JULY 2002

Fg 4. 100W into 4/H9024circuit diagram

This publication is issued to provide outline information only which (unless agreed by the Company in writing) may not be used, applied or reproduced for any purposes or form part of any order or contract or be regarded as representation relating to the products or services concerned. The company reserves the right to alter without notice the specification, design, price or conditions of supply of any product or service. Some changes to earlier published data may have been made, data presented in this handbook supersedes all previous specifications. The information contained in this publication has been carefully checked and is considered to be accurate, but no responsibility is assumed for any inaccuracies. Zetex makes no warranty, representation or guarantee regarding the suitability of the products and circuits in this publication for any given purpose; nor does Zetex assume any liability arising from the use or application of any these products or circuits and specifically disclaims any and all incidental damages. Zetex products are specifically not authorised for use as critical components in life support devices or systems without the express written approval of the Managing Director of Zetex plc. As used herein - a. Life support devices or systems are devices or systems which (1) are intended to implant into the body, or (2) support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labelling can be reasonable expected to result in significant injury to the user. b. A critical component is any component on a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or to affect its safety or effectiveness. E. & O.E. “all rights reserved” ZXCD100MOEVAL ISSUE 2 - JULY 2002 Europe Zetex plc Fields New Road Chadderton Oldham, OL9 8NP United Kingdom Telephone (44) 161 622 4422 Fax: (44) 161 622 4420 uk.sales@zetex.com Zetex GmbH Streitfeldstraße 19 D-81673 München Germany Telefon: (49) 89 45 49 49 0 Fax: (49) 89 45 49 49 49 europe.sales@zetex.com Americas Zetex Inc

700 Veterans Memorial Hwy

Hauppauge, NY11788 USA Telephone: (631) 360 2222 Fax: (631) 360 8222 usa.sales@zetex.com Asia Pacific Zetex (Asia) Ltd 3701-04 Metroplaza, Tower 1 Hing Fong Road Kwai Fong Hong Kong Telephone: (852) 26100 611 Fax: (852) 24250 494 asia.sales@zetex.com These offices are supported by agents and distributors in major countries world-wide. This publication is issued to provide outline information only which (unless agreed by the Company in writing) may not be used, applied or reproduced for any purpose or form part of any order or contract or be regarded as a representation relating to the products or services concerned. The Company reserves the right to alter without notice the specification, design, price or conditions of supply of any product or service. For the latest product information, log on to www.zetex.com © Zetex plc 2002