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UM_2102_PL88_2013_192558
REF_MA5332BTLSPS
MA5332M reference board
About this document
Scope and purpose
The REF_MA5332BTLSPS reference board is a one BTL channel, 200 W/ch (4 Ω at 40 V) class D audio power
amplifier for home audio systems. This reference board demonstrates how to use MA5332MS IC with a single
power supply and design an optimum PCB layout using Infineon integrated Class D IC. This reference design
does not require additional heatsink or fan cooling for normal operation (one-eighth of continuous rated
power). The reference design provides all the required housekeeping power supplies for ease of use.
Applications
Smart speakers
Sound bars
Sub-woofers
Powered speakers
Musical instrument amplifiers
Car audio amplifiers
Features
Output power:
200 W x 1 channels (10 percent THD+N, 4 Ω at 40 V)
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Multiple protection features:
Over-Current Protection (OCP), high-side and low-side
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Over-Temperature Protection (OTP)
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PWM modulator:
Self-oscillating half-bridge topology with optional clock synchronization
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User Manual
www.infineon.com
page 1 of 24
V 1.0
2020-07-07
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Table of Contents
Related Manuals for Infineon REF MA5332BTLSPS
Summary of Contents for Infineon REF MA5332BTLSPS
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Page 1: About This Document
This reference board demonstrates how to use MA5332MS IC with a single power supply and design an optimum PCB layout using Infineon integrated Class D IC. This reference design does not require additional heatsink or fan cooling for normal operation (one-eighth of continuous rated power). -
Page 2: Table Of Contents
REF_MA5332BTLSPS MA5332MS reference board 200 W class D amplifier Table of contents About this document ........................1 Table of contents ..........................2 Specifications ........................3 REF_MA5332BTLSPS overview ....................4 Set-up guide .......................... 5 Audio analyzer set-up ......................6 Operating the evaluation board ....................7 Test set-up ............................... -
Page 3: Specifications
1Vrms input yields rated power Table 2 Electrical data Data Typical Notes/conditions MA5332MS integrated class D IC Infineon devices Modulator Self-oscillating, second-order sigma-delta modulation, analog input Output power: (1 percent THD+N) 150 W 1 kHz, RL = 4 Ω Output power: (10 percent THD+N) 200 W 1 kHz, RL = 4 Ω... -
Page 4: Ref_Ma5332Btlsps Overview
REF_MA5332BTLSPS MA5332MS reference board 200 W class D amplifier REF_MA5332BTLSPS overview The REF_MA5332BTLSPS features a one BTL channel self-oscillating type PWM modulator for the lowest component count, convenient single power supply and highest performance and robust design. This topology represents an analog version of a second-order sigma-delta modulation, with the class D switching stage inside the loop. -
Page 5: Set-Up Guide
REF_MA5332BTLSPS MA5332MS reference board 200 W class D amplifier Set-up guide Typical connections 250W, Non-inductive Resistors 4 Ohm 40V, 7A DC supply Power Input Output MA5332MS Input Audio Signal Generator Figure 2 Typical connection connector description Table 3 Connector description ANALOG INPUT Analog balanced input OUTPUT... -
Page 6: Audio Analyzer Set-Up
REF_MA5332BTLSPS MA5332MS reference board 200 W class D amplifier Audio analyzer set-up Figure 3 Audio analyzer connection User Manual 6 of 24 V 1.0 2020-07-07... -
Page 7: Operating The Evaluation Board
REF_MA5332BTLSPS MA5332MS reference board 200 W class D amplifier Operating the evaluation board Test set-up Connect 4 Ω 250 W dummy loads to output connector (J1 as shown in Figure 2) and parallel it with the input of the Audio Precision (AP) analyzer. Connect the Audio Signal Generator (ASG) to J3 for analog signal respectively (AP). -
Page 8: Audio Performance
REF_MA5332BTLSPS MA5332MS reference board 200 W class D amplifier Audio performance Power vs. THD+N Test conditions: = 40 V Input signal = 1 kHz Load impedance = 4 Ω = 400 kHz 0.05 0.02 0.01 0.005 0.002 0.001 100m 200m 500m Figure 4 Power vs. -
Page 9: Noise Floor
REF_MA5332BTLSPS MA5332MS reference board 200 W class D amplifier Noise floor Test conditions: = 40 V No input signal Load impedance = 4 Ω = 400 kHz -100 -110 -120 -130 -140 -150 Figure 6 Noise floor 4 Ω load Noise floor with 1 V output Test conditions:... -
Page 10: Efficiency
REF_MA5332BTLSPS MA5332MS reference board 200 W class D amplifier Efficiency Test conditions: = 40 V Output = 1 V at 1 kHz Load impedance = 4 Ω = 400 kHz MA5332BTLSPS 4ohm 100.0% 90.0% 80.0% 70.0% 60.0% 50.0% 40.0% 30.0% MA5332BTLSPS 4ohm 20.0% 10.0%... -
Page 11: Thermal Information
REF_MA5332BTLSPS MA5332MS reference board 200 W class D amplifier Thermal information Test conditions: = 40V Input signal = 1 kHz Both channels driven = 400 kHz Load = 4 Ω Thermal performance Table 4 Thermal performance (with heatsink) Output Power(W) Tc(°C) Record time 18.75... -
Page 12: Heatsink
REF_MA5332BTLSPS MA5332MS reference board 200 W class D amplifier Figure 10 Peak power P = 200 W with 4 Ω load 40 V with heatsink Note: Maximum temperature 109.2°C at 1 minute and 144°C at 5 minutes. Heatsink Figure 11 Heatsink dimension User Manual 12 of 24... -
Page 13: Gain Setting
REF_MA5332BTLSPS MA5332MS reference board 200 W class D amplifier Gain setting REF_MA5332BTLSPS reference board has two gain settings for the single power supply application, which is different from split power supplies application. The AC gain setting (red path in Figure 12) is the same as the normal gain setting, the ratio of RFB and Rin is the AC gain. -
Page 14: Vbus Calculation
REF_MA5332BTLSPS MA5332MS reference board 200 W class D amplifier Vbus Calculation Vbus is calculated by the load impedance and clipping power(normally 75% of RMS power) Vbus=(2*P )^(1/2)/M clipping load M is maximum modulation index, normally M=90% Vbus=(2*200*75%*4)^(1/2)*90% =38.5V Use 40V as Vbus in this design. AC gain setting: AC gain is the mean ratio of the signal amplitude at the output to the amplitude at the input. -
Page 15: Dc Gain Setting
REF_MA5332BTLSPS MA5332MS reference board 200 W class D amplifier DC gain setting: DC gain is to set the output DC operation point at half of the Vbus. Output DC operation point= ½ *Vbus=V *DC gain =½* of V DC gain= ½* Vbus/V = (R )/ R FB(Class D stage) -
Page 16: Schematic
REF_MA5332BTLSPS MA5332MS reference board 200 W class D amplifier Schematic Figure 14 Schematic User Manual 16 of 24 V 1.0 2020-07-07... -
Page 17: Pcb
REF_MA5332BTLSPS MA5332MS reference board 200 W class D amplifier 11.1 PCB specification 1. Two-layer SMT PCB with through-holes 2. 1/16 thickness 3. 2/0 oz. Cu 4. FR4 material 5. 10 mil lines and spaces 6. Solder mask to be green enamel EMP110 DBG (CARAPACE) or Enthone endplate DSR-3241 or equivalent 7. -
Page 18: Pcb Layout
REF_MA5332BTLSPS MA5332MS reference board 200 W class D amplifier 11.2 PCB layout Figure 15 Board top view User Manual 18 of 24 V 1.0 2020-07-07... - Page 19 REF_MA5332BTLSPS MA5332MS reference board 200 W class D amplifier Figure 16 Board bottom view User Manual 19 of 24 V 1.0 2020-07-07...
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Page 20: Bill Of Materials (Bom)
D1, D2, D3, D4 400MW SOD123 Digikey DIODE GEN PURP 200V 2A MURA120T3GOSCT-ND D5, D6, D7, D8 Digikey 2 CH Integrated Digital MA5332MS Audio Amplifier Infineon IC OPAMP GP 2 CIRCUIT 296-2421-1-ND 8SOIC Digikey User Manual 20 of 24 V 1.0 2020-07-07... - Page 21 REF_MA5332BTLSPS MA5332MS reference board 200 W class D amplifier Part number Designator Description Quantity Vendor 2 Position Terminal Block ED2779-ND J1',J8' Plug Digikey 2 Position Terminal Block ED2779-ND J1',J8' Plug Digikey TERM BLOCK HDR 3POS A98249-ND 90DEG 5MM Digikey TERM BLOCK PLUG 3POS A113286-ND Digikey STR 5MM...
- Page 22 REF_MA5332BTLSPS MA5332MS reference board 200 W class D amplifier Part number Designator Description Quantity Vendor RES SMD 100K OHM 1% 311-100KCRCT-ND 1/8W 0805 Digikey RES SMD 3.3K OHM 5% Digikey RHM3.3KGCT-ND R31, R32 1/10W 0603 RMCF2512JT1K20CT- RES 1.2K OHM 5% 1W R34, R38 2512 Digikey...
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Page 23: Revision History
REF_MA5332BTLSPS MA5332MS reference board 200 W class D amplifier Revision history Document Date of release Description of changes version V 1.0 2021-03-07 Initial release V 1.1 2021-07-19 Changed part number MA5332 --> MA5332MS V 1.2 2023-05-16 Updated schematic with high resolution image User Manual 23 of 24 V 1.0... - Page 24 With respect to any examples, hints or any typical 81726 Munich, Germany values stated herein and/or any information WARNINGS regarding the application of the product, Infineon Technologies hereby disclaims any and all Due to technical requirements products may contain warranties and liabilities of any kind, including dangerous substances.
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