Audio Output Middleware CRI D-Amp Driver

Audio Output Middleware CRI D-Amp Driver TM Software-Defined Full-Digital Amplifier High Sound Pressure Level Low Power Consumption Heat Reduction 　 Powerful Sound Long-life Battery Achieve a Performance Heatsink-free Design Simple System Architecture Software-based audio processing and output General-Purpose H-Bridge Circuit General-Purpose Embedded MCU (Amplification) Speaker / Piezo Buzzer ● Pure sound quality ● Standardized design ● Reduce Supply Chain Risks Significant low noise and preserves Component replacement with only a Reduce procurement costs and inventory quality by the simple architecture middleware update - without redesign risks through standard components Component changes Direct PWM speaker drive Reduced Component Inventory CRI D-Amp Driver Products generates PWM signals & & CRI D-Amp Driver Reusable CRI D-Amp Driver

Difference from Class-D Amplifiers Complete Digital Audio Output without the Analog Stage CRI D-Amp Driver MCU with CRI D-Amp Driver Application 001001 Control 110101 Signal 001011 010110 Drive PWM Signal Play Audio Data PWM Signal Output PWM Amplification This step does not exist Class-D Amplifiers Application 001001 110101 Control 001011 Signal 010110 Drive Analog Signal Play Audio Data D/A Conversion Resampling PWM Amplification Superior Sound Quality Low Noise and High Immunity Our fully digital design and unique output method minimize noise levels. The differential drive system removes noise superimposed on the signal applied to the speaker. Noise Level Comparison Noise Elimination Mastering-Grade by Differential Drive Headphone Amplifier Speaker Input A Speaker Input B Device Measurement Limit Speaker (Noise Floor) drive condition Faithful Hi-Fi Reproduction Enables more faithful reproduction of the original sound, especially at low frequencies. CRI D-Amp Driver Typical Class-D amplifier CRI D-Amp Driver Typical Class-D amplifier Square Wave PWM Output Audio Signal Noise 100Hz 0dB Level:2.976V LPF fc=18kHz 100Hz 0dB Level:2.991V LPF 80Hz, 10dB, w/o LPF 80Hz, 10dB, w/o LPF Our Measurements

4 Easy Implementation Component Cost Reduction Just a simple H-bridge circuit—just transistors and a few resistors—is required in addition to the MCU, significantly lowering overall component costs. Compact Software Module The software implemented in the MCU is a lightweight, compact module with minimal processing load, making it easy to integrate even in environments with limited resources. Application CRI D-Amp Driver Comprehensive Hardware Compatibility (Outputs & MCUs) Multiple Audio Devices Support Speaker Piezo Buzzer Exciter Music (Hi-Fi), Voice, Chime Warning Sounds, Chime Vibration, Bass High efficiency Operates on battery power High driving force CD-quality sound reproduction Reliable even in harsh Operates reliably even environments in harsh environments Home & Car Audio, Automotive & Industrial Equipment, Safety & Residential Equipment, Automotive & Industrial Equipment, Portable & Consumer Electronics, PA & Amusement Systems Healthcare & Office Devices Healthcare Devices Verified MCU and FPGA Manufacturer Verified MCU and FPGA Manufacturer Verified MCU and FPGA Infineon F2MC-16FX,FR81S,FM0+,FM3, STMicro STM32 FM4,PSoC,PRoC,Traveo NXP Kinetis,LPS Renesas SuperH,RL78,RX,RZ,RA,RE Microchip PIC24F,SAM,dsPIC33 RH850,R-Car NORDIC nRF52,nRF54 TOSHIBA TZ2100,TXZ3,TXZ4 Efinix Titanium series (FPGA) We can also provide support tailored to the MCU you use. For details, please feel free to contact us.

Power Saving About 50% Lower Power Consumption (Up to 60% Less with GaN FETs) Compared to conventional Class-D amplifiers, the same sound pressure can be achieved with approximately 60% less power consumption (based on our measured data). Amplifier Power Consumption vs. Sound Pressure Level (Comparison of Class-D and CRI D-Amp Drivers) Convergence by Amplifier power consumption speaker diameter for 80 dB SPL Software-Defined Full-Digital Amplifier 1.1W Conventional Class-D Amplifier 0.55W CRI D-Amp Driver(MOSFET) CRI D-Amp Driver×GaN 0.43W Target Amplifier Sound Meter 8Ω 8φ mic 0.5m Note: Comparison of amplifier output stage power only Sin 1kHz -∞~0dBFS (logic section excluded) CRI D-Amp Driver × GaN By using Gallium Nitride (GaN) FETs in the H-Bridge circuit of the CRI D-Amp Driver, achieves about 60% lower power consumption compared to conventional Class-D amplifiers, as shown above. Actual Size: 1.3 × 1.3 inch (25 W × 2 channels output) Product Website GaN Device 0 Actual size (inch scale shown) 1 Full-Digital Ultra-Compact Audio Amplifier Design Trademarks “CRIWARE” and “CRI D-Amp Driver” are registered trademarks or trademarks of CRI Middleware Co., Ltd. in Japan and other countries. Other company and product names are trademarks or registered trademarks of their respective owners. Information in this catalog is current as of December 2025 and may be subject to change without notice. Shibuya Infoss Tower, 11F 20-1 Sakuragaoka-cho, Shibuya-ku, Tokyo https://www.cri-mw.co.jp EN2025CRIDAD500M Good/Cool