Monolithic Power Systems Inc. EV7770-F-00B

Overview

EV7770-F-00B from Monolithic Power Systems is a single-channel, mono bridge-tied load (BTL) Class D audio amplifier evaluation board built around the MP7770GF IC. It delivers 90W into an 8Ω load at 36V VDD with ≤10% THD, features a proprietary variable-frequency topology, supports 9.5–36V single-supply operation, and integrates protection circuits including over-temperature warning (OTW), fault reporting, and short-circuit protection - designed for rapid validation of high-power audio subsystems in consumer audio systems.

For engineers reviewing the EV7770-F-00B datasheet, EV7770-F-00B pinout, EV7770-F-00B application, or EV7770-F-00B equivalent, this board enables functional verification of MP7770GF-based BTL amplifier designs, evaluation of thermal behavior under sustained 90W output, assessment of THD+N performance (0.04% at 1W/8Ω/1kHz), and validation of enable/shutdown sequencing, pop elimination, and fault signaling via dedicated OTW/FAULT pins.

Technical Context

The EV7770-F-00B implements a fully integrated mono BTL Class D amplifier architecture centered on the MP7770GF TSSOP-28-EP IC. It uses MPS's proprietary variable-frequency modulation scheme to achieve fast transient response and high linearity without external compensation, while supporting differential or single-ended input via jumper CN2.

Power delivery is configured for 9.5–36V single-rail operation with onboard banana connectors for VDD, GND, SPK+, and SPK−. Protection logic monitors temperature and current through dedicated FAULT and OTW pins, with status decoded via a 2-bit output (00 = normal, 01 = OTW, 10 = fault, 11 = OTW + fault), enabling real-time system-level diagnostics.

Key Specifications

Availability

EV7770-F-00B is available at Aetrix Electronics and suitable for DVD receivers, mini combo systems, home theater systems, and surround sound systems requiring stable component supply during prototyping, pre-production validation, and reference design development.

Supply support for EV7770-F-00B 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 mixed-signal ICs for power management and audio applications, with global design and support infrastructure.

The EV7770-F-00B belongs to MPS's Class D audio amplifier evaluation platform family, engineered to accelerate adoption of their fully integrated, high-efficiency audio solutions in cost-sensitive, space-constrained consumer audio products.

FAQ

What is the maximum continuous output power supported by the EV7770-F-00B?

The board delivers 90W continuous output into an 8Ω load at 36V VDD with ≤10% THD, verified per the MP7770GF datasheet and board-level thermal testing. Sustained operation above this requires active cooling or reduced ambient temperature per the quick-start guide's thermal derating notes.

Can the EV7770-F-00B operate from a 12V supply?

Yes - the board supports 9.5V–36V input. For 12V operation, R16 must be changed to 16.9kΩ and R15 adjusted to 27kΩ per the Quick Start Guide to ensure proper EN threshold and UVLO behavior, maintaining safe startup and shutdown sequencing.

How do I configure the board for differential input?

Remove the jumper on CN2 to disable the internal single-ended input path. The IN+ and IN− terminals then accept balanced differential signals directly, preserving common-mode rejection and minimizing noise coupling in high-gain audio stages.

What does the FAULT and OTW pin behavior indicate?

The FAULT and OTW pins form a 2-bit status code: 00 = normal operation; 01 = over-temperature warning only; 10 = fault (over-current or over-temperature shutdown); 11 = both OTW and fault active. This allows precise root-cause identification without oscilloscope probing.

Is the EV7770-F-00B RoHS-compliant and lead-free?

Yes - all components on the board, including the MP7770GF IC, are lead-free and comply with the RoHS directive. MPS confirms green status for this part on its official Quality Assurance page, with full material declarations available upon request.

Does the board include pop/click suppression during startup and shutdown?

Yes - the MP7770GF IC integrates proprietary startup/shutdown pop elimination circuitry, and the EV7770-F-00B preserves this functionality. Verified measurements show no audible transients when toggling the EXT_ENABLE switch under typical operating conditions.