Monolithic Power Systems Inc. EV8049S-U-00A

Overview

EV8049S-U-00A from Monolithic Power Systems is an evaluation board for the MP8049S quad-channel power half-bridge IC, configured as a stereo Bridge-Tied Load (BTL) Class-D audio amplifier stage. It supports 5–26 V supply, delivers ±5.5 A peak output per channel, operates up to 1 MHz switching frequency, and integrates fault reporting, thermal shutdown, and under-voltage protection. Designed for high-fidelity audio output into 6–8 Ω speakers.

For engineers reviewing the EV8049S-U-00A datasheet, EV8049S-U-00A pinout, EV8049S-U-00A application, or EV8049S-U-00A equivalent, this board enables rapid validation of MP8049S-based stereo BTL audio power stages, PWM timing alignment, thermal management under 37 W/channel load, and fault flag behavior during overcurrent or overtemperature events.

Technical Context

The EV8049S-U-00A implements a dual BTL configuration using two independent MP8049S channels-each driving one speaker with complementary PWM inputs (e.g., PWM1A/PWM1B). All four half-bridges use integrated 0.14 Ω MOSFETs with 10 ns dead-time control and internal current limiting.

It provides logic-level TTL-compatible I/O (SHDNB, STBYB, FAULTB, FLTB2/FLTB3), supports direct connection to microcontroller PWM peripherals, and routes dedicated PGND/AGND planes to minimize noise coupling in high-current audio paths.

Key Specifications

Availability

EV8049S-U-00A is available at Aetrix Electronics and suitable for Class-D audio amplifier development, speaker driver validation, and embedded audio subsystem prototyping requiring stable component supply, traceable sourcing, and documented reference design support.

Supply support for EV8049S-U-00A includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance analog and power ICs, with core expertise in DC/DC converters, LED drivers, motor drivers, and Class-D audio solutions.

The MP8049S product line targets high-efficiency, high-current audio power stages for flat-panel TVs and home theater systems, emphasizing integration of protection features, low R_DS(on), and precise dead-time control in compact QFN packages.

FAQ

What is the primary function of the EV8049S-U-00A evaluation board?

The EV8049S-U-00A is a fully assembled, tested reference platform for the MP8049S quad-channel half-bridge IC. It demonstrates stereo BTL Class-D audio amplification with real-world layout, thermal management, and fault signaling - enabling immediate functional validation without custom PCB design.

Can the board drive 4 Ω speakers?

No - the board is optimized and tested for 6–8 Ω loads per channel. Driving 4 Ω loads exceeds the MP8049S's safe operating area under typical 24 V supply and may trigger current limit or thermal shutdown due to increased RMS current and power dissipation.

How are the PWM inputs configured for BTL operation?

PWM1A and PWM1B form one complementary pair driving Channel 1's high-side and low-side switches; PWM2A and PWM2B do the same for Channel 2. Each pair must be anti-phase with matched rise/fall times and ≤10 ns skew to prevent shoot-through, as enforced by the MP8049S's internal 10 ns dead-time circuitry.

What does the FLTB2/FLTB3 signal combination indicate when both are low?

When FLTB2 = 0 and FLTB3 = 0, the MP8049S reports undervoltage protection (UVP) activation - triggered when VDD falls below the internal threshold (~4.5 V). This condition disables all outputs and asserts FAULTB until VDD recovers and the device exits fault latch.

Is external heat sinking required during continuous 37 W/channel operation?

Yes - sustained 37 W/channel output at 24 V requires forced airflow or heatsink attachment to the MP8049S QFN40 package. The board's copper pour and thermal vias provide baseline conduction cooling, but ambient temperature >40 °C necessitates additional thermal management to maintain junction temperature <125 °C.

Does the board support single-ended (SE) output mode?

No - the EV8049S-U-00A is hardwired for BTL operation only. Its output filtering (L-C networks), speaker terminal routing (SPK_OUT1A/B, SPK_OUT2A/B), and default jumper configuration assume differential drive. SE operation would require PCB modification and removal of output chokes.