Monolithic Power Systems Inc. EV7770-F-00A

Overview

EV7770-F-00A from Monolithic Power Systems is a discontinued evaluation board for the MP7770GF stereo Class D audio amplifier IC, delivering 45W per channel into 4Ω at 36V VDD using single-ended output topology. It integrates 100mΩ MOSFETs, startup/shutdown pop elimination, and short-circuit protection, and supports 9.5–36V single-supply operation for high-fidelity audio prototyping.

For engineers reviewing the EV7770-F-00A datasheet, EV7770-F-00A pinout, EV7770-F-00A application, or EV7770-F-00A equivalent, this board enables rapid validation of MP7770GF-based 45W stereo SE Class D amplifier designs in home theater, mini-combo, and high-power audio docking systems - with verified THD+N (0.03% @1W), efficiency (92% @45W/4Ω), and low noise (90μV typical).

Technical Context

The EV7770-F-00A implements the MP7770GF's proprietary variable-frequency Class D modulation topology to achieve fast transient response and excellent linearity without external LC filter tuning. It operates from a single 9.5–36V supply and includes integrated thermal shutdown, overcurrent, and overtemperature warning/fault reporting via dedicated pins.

Board-level features include dual RCA inputs, banana-jack power terminals (VDD/GND), speaker connectors, DPDT enable switch, and configurable resistor network (R16/R15) for VDD shutdown threshold adjustment across 12V/24V/36V operation modes - all validated per MP7770GF's electrical specifications and layout guidelines.

Key Specifications

Availability

EV7770-F-00A is available at Aetrix Electronics and suitable for home theater system prototyping, mini-combo audio development, and high-power sound box validation requiring stable component supply during legacy design support and migration planning.

Supply support for EV7770-F-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 EV7770-F-00A belongs to MPS's audio evaluation platform family, designed specifically to accelerate adoption of their fully integrated Class D amplifier ICs - emphasizing solution size reduction, pop/click suppression, and robust protection in consumer and professional audio applications.

FAQ

Is EV7770-F-00A still in production?

No. EV7770-F-00A is end-of-life and superseded by EV7770-F-01A. MPS discontinued this revision as of Rev. 1.0 (January 2013). Aetrix Electronics stocks remaining units for legacy design support and migration verification only - no new manufacturing or long-term supply commitment exists.

What IC does EV7770-F-00A evaluate?

EV7770-F-00A evaluates the MP7770GF - a 2-channel, single-ended Class D audio amplifier IC in TSSOP-28-EP package. The board implements its full feature set including variable-frequency modulation, integrated 100mΩ MOSFETs, and OTW/FAULT reporting via U1's dedicated pins (pins 13/14/11).

Can EV7770-F-00A operate at 12V or 36V?

Yes - it supports 9.5–36V single-supply operation. Factory default is 24V SE mode. For 36V, R16 must be changed to 64.3kΩ; for 12V, R16 becomes 16.9kΩ and R15 adjusted to 27kΩ per the Quick Start Guide. These modifications ensure correct UVLO and EN bias under varying input conditions.

How is fault status reported on this board?

Fault status is reported via U1's FAULT (pin 13) and OTW (pin 14) pins, routed to test points and decoded using the truth table in the documentation. Logic states indicate overtemperature warning, overtemperature shutdown, or overcurrent events - enabling real-time debug without oscilloscope probing of internal nodes.

Does the board include input/output filtering components?

Yes. It includes full signal path filtering: 22pF C0G input coupling caps (C1/C22), 390pF C0G feedback networks (C10/C19), 1μF X7R output stage bypass (C8/C9/C14/C17), and 1000μF/2200μF bulk electrolytics (C7/C16/C23) - all selected per MP7770GF's recommended layout and stability criteria.

What speaker impedance range is supported?

The board supports 3Ω to 8Ω speakers, with minimum 3Ω load required for 36V operation. At 4Ω, it delivers rated 45W/channel; at 8Ω, output drops to 23W/channel - both tested at ≤10% THD. Impedance selection directly affects thermal performance and maximum safe output power.