Monolithic Power Systems Inc. EV020A-5-S-00B

Overview

EV020A-5-S-00B from Monolithic Power Systems is an evaluation board for the MP020A-5 primary-side-regulated flyback controller IC, designed to deliver 12 V / 0.7 A (8.4 W) output from universal AC input (85–265 VAC, 50/60 Hz), targeting cost-sensitive home appliance auxiliary power supplies with integrated 700 V MOSFET and no optocoupler.

For engineers reviewing the EV020A-5-S-00B datasheet, EV020A-5-S-00B pinout, EV020A-5-S-00B application, or EV020A-5-S-00B equivalent, this board enables rapid validation of primary-side regulation, CC/CV control, surge immunity (IEC61000-4-5), and conducted EMI compliance (EN55022) in compact 50 mm × 30 mm × 18 mm form factor.

Technical Context

The EV020A-5-S-00B implements a single-stage flyback topology using primary-side sensing via auxiliary winding voltage sampling (R5/R6 divider), eliminating secondary feedback components. It leverages variable off-time, peak-current control and a 550 µA high-voltage startup current source for direct AC line connection.

Protection functions include cycle-by-cycle current limiting, over-temperature shutdown, over-voltage protection (OVP), over-current protection (OCP), open-circuit protection (OCkP), and VCC under-voltage lockout (UVLO). Natural spectrum shaping reduces EMI without added filtering complexity.

Key Specifications

Availability

EV020A-5-S-00B is available at Aetrix Electronics and suitable for home appliance auxiliary power, handheld device adapters, and low-power standby supply applications requiring stable component supply, pre-validated safety margins, and regulatory-compliant reference design reuse.

Supply support for EV020A-5-S-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 power ICs, with emphasis on integration, efficiency, and system-level reliability for power conversion and management.

The EV020A-5-S-00B belongs to MPS's evaluation board portfolio for primary-side-regulated AC/DC controllers, developed to accelerate adoption of optocoupler-free, low-BOM-cost flyback solutions in cost-sensitive consumer and appliance markets.

FAQ

What is the core IC used on the EV020A-5-S-00B board?

The board integrates the MP020A-5GS - a monolithic primary-side regulator in SOIC-8-7A package featuring an integrated 700 V MOSFET, high-voltage startup circuit, and precise constant-voltage/constant-current control without secondary feedback components.

Does the EV020A-5-S-00B require an isolation transformer during testing?

Yes - the documentation explicitly warns that the engineering prototype lacks agency safety certification, and all AC input testing must be performed using an isolation transformer to protect personnel and test equipment from hazardous mains potentials.

How is output voltage regulation achieved without an optocoupler?

Regulation uses primary-side sensing: the auxiliary winding on T1 provides a scaled replica of the output voltage, sampled by resistor divider R5/R6 and fed into the MP020A-5's internal error amplifier - enabling accurate 12 V regulation without secondary-side components.

What transformer is specified for the EV020A-5-S-00B?

The board uses a custom EE16 gapped ferrite transformer (Wurth 7508110328 or Emei FX0303) with primary inductance 2.48 mH ±10%, turns ratio NP:NP_AU:NS = 184:15:16, triple-insulated secondary winding, and 3000 VAC isolation between primary and secondary.

Can the EV020A-5-S-00B be used for constant-current applications like LED drivers?

Yes - the MP020A-5 supports programmable cable compensation and precise constant-current mode; the board's design allows adaptation to CC loads by adjusting R5/R6 feedback network and output sensing configuration per application notes AN-109 and AN-112.

What protections are implemented on the EV020A-5-S-00B?

Hardware-enforced protections include over-temperature shutdown (OTP), over-voltage protection (OVP), over-current protection (OCP), open-circuit protection (OCkP), cycle-by-cycle current limiting, and VCC under-voltage lockout (UVLO), all managed internally by the MP020A-5GS.

Is RoHS compliance confirmed for this evaluation board?

Yes - all MPS parts, including the MP020A-5GS IC and associated passives on EV020A-5-S-00B, are lead-free and comply with the RoHS directive; green status documentation is available on the MPS Quality Assurance webpage.