Monolithic Power Systems Inc. EV6922DS-01A

Overview

EV6922DS-01A from Monolithic Power Systems is a dedicated evaluation board for the MP6922DS dual-channel synchronous rectifier controller, configured for LLC resonant converter topologies with center-tapped secondary windings. It supports high-side and low-side MOSFET rectification, operates from 8–24 V_VDD, delivers <20 ns total turn-off delay, and enables efficiency gains over Schottky diodes in AC-DC adapters and LCD TV power supplies.

For engineers reviewing the EV6922DS-01A datasheet, EV6922DS-01A pinout, EV6922DS-01A application, or EV6922DS-01A equivalent, this board provides validated layout, BOM, and startup guidance for rapid integration of MP6922DS-based synchronous rectification in LLC SMPS designs requiring <600 µA light-load quiescent current and up to 300 kHz switching frequency.

Technical Context

The EV6922DS-01A implements a complete reference design for the MP6922DS IC, which uses adaptive gate timing and dual independent outputs (VG1/VG2) to drive N-channel MOSFETs in high- and low-side configurations. It supports CCM, CrCM, and DCM operation modes without external compensation.

Board-level features include dual 60 V N-channel MOSFETs (AM90N06-10P), input voltage conditioning via 2200 µF/35 V electrolytic capacitors, and precision timing network components (470 pF ceramic caps, 1 nF snubbers) matched to MP6922DS's internal propagation delay and sensing thresholds.

Key Specifications

Availability

EV6922DS-01A is available at Aetrix Electronics and suitable for AC-DC adapter development, LCD/PDP TV power supply qualification, and Telecom SMPS prototyping requiring stable component supply, repeatable thermal validation, and pre-verified gate-drive timing margins.

Supply support for EV6922DS-01A 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 conversion, LED drivers, motor drivers, and power management solutions.

The MP6922DS product line targets high-efficiency secondary-side synchronous rectification in resonant and quasi-resonant converters, specifically engineered to replace Schottky diodes in energy-sensitive applications like ultra-low-standby AC-DC systems.

FAQ

What topology does the EV6922DS-01A support?

The EV6922DS-01A is configured exclusively for LLC resonant converters with center-tapped secondary windings. It connects directly to transformer secondary outputs (VS1/VS2), center tap (VD1/VD2), and gate drive nodes (VG1/VG2) per MP6922DS's dual-channel architecture. It is not designed for flyback, forward, or half-bridge topologies.

Which IC is populated on the EV6922DS-01A board?

The EV6922DS-01A board has U1 populated with the MP6922DS in SOIC-14 package. U2 (MP6922DN, SOIC-8) and U3 (MP6922DSE, SOIC-8) are marked as "NS" (Not Stuffed) in the BOM and are not installed on the shipped board.

Does the board include MOSFETs and heatsinks?

Yes - the board includes two AM90N06-10P 60 V N-channel MOSFETs (M1/M2) in TO-220 packages, each mounted with an isolation gasket and radiator, plus four board stanchions for mechanical stability during thermal testing.

What input voltage range can the board accept?

The board accepts 8–24 V DC applied to the VDD pin of the MP6922DS, matching the IC's specified operating range. This is intended for auxiliary or bias supply input - the main AC-DC conversion occurs externally; the board only handles secondary-side synchronous rectification.

How is light-load efficiency achieved?

Light-load efficiency is enabled by the MP6922DS's sub-600 µA quiescent current in light-load mode, combined with adaptive gate drive that minimizes switching losses. The board's 10 µF and 2.2 µF ceramic output capacitors reduce ripple and ESR-related losses at partial load.

Can the board be used for both high-side and low-side rectification simultaneously?

Yes - the EV6922DS-01A is wired to support concurrent high-side and low-side rectification using VG1 and VG2 outputs driving separate MOSFETs (M1 and M2). The schematic shows independent VS1/VD1 and VS2/VD2 sensing paths, enabling true dual-channel operation in center-tapped LLC configurations.