Monolithic Power Systems Inc. EV163-S-00A

Overview

EV163-S-00A from Monolithic Power Systems is a universal-input, dual-output, non-isolated off-line regulator evaluation board built around the MP163CGS-5 primary-side constant voltage controller in SOIC8-7B package. It implements a buck topology delivering 12V/200mA and 5V/50mA simultaneously from 85–265VAC input, achieves <30mW no-load power consumption, meets EN55022 conducted EMI and IEC61000-4-5 1kV surge immunity, and supports thermal shutdown, OLP, SCP, and open-loop protection.

For engineers reviewing the EV163-S-00A datasheet, EV163-S-00A pinout, EV163-S-00A application, or EV163-S-00A equivalent, this board enables rapid validation of MP163-based buck designs for cost-sensitive, low-power AC/DC conversion-particularly where opto-coupler-free CV regulation, compact footprint (47mm × 30mm), and drop-in evaluation of the MP163 SOIC8-7 family are required.

Technical Context

The EV163-S-00A implements a primary-side-controlled buck regulator using the MP163CGS-5 IC, eliminating the need for an opto-coupler while maintaining ±5% output voltage regulation across line and load variations. It integrates a 700V MOSFET and internal high-voltage current source, enabling direct AC rectified bus (VBUS) operation with peak-current control and frequency foldback.

Board-level design includes a π-filter (C4–L1–C5) for EN55022 compliance, VCC biasing via R2/C2/D1, output sampling through C1/R1/R4, and dedicated ceramic + electrolytic output filtering (C6/C7 for 12V; C9/C10 for LDO-derived 5V). Protection features are implemented entirely within the MP163, with no external fault-sensing circuitry required.

Key Specifications

Availability

EV163-S-00A is available at Aetrix Electronics and suitable for home appliance standby power, industrial control auxiliary supplies, and consumer electronics AC/DC conversion requiring stable component supply, fast evaluation turnaround, and reference-grade performance validation.

Supply support for EV163-S-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 expertise in DC/DC conversion, LED drivers, motor drivers, and AC/DC controllers since 1997.

The EV163-S-00A belongs to MPS's evaluation board portfolio for its MP163 primary-side regulator family, designed specifically to accelerate development of cost-optimized, non-isolated offline power supplies targeting white goods, smart home devices, and industrial IoT edge nodes.

FAQ

What topologies does the EV163-S-00A support?

The EV163-S-00A is configured exclusively as a buck regulator per its schematic and bill of materials. While the underlying MP163 IC supports buck-boost, boost, and flyback topologies, this specific board implements only buck operation with fixed 12V/5V outputs and no user-modifiable transformer or inductor configuration for alternate topologies.

Can I substitute other MP163 variants on this board?

Yes-the board is designed for drop-in replacement of MP163 variants in SOIC8-7B package, including MP163AGS-5 and MP163BGS-5. However, inductors L1 and L2 must be adjusted per variant: MP163A requires 2.2mH, MP163B requires 1.8mH, and MP163CGS-5 uses the supplied 3.3mH (3300µH) inductor for optimal performance.

Does the board provide isolation between input and output?

No-the EV163-S-00A implements a non-isolated buck topology. Input AC lines connect directly to the rectified bus (VBUS), and both output rails share common ground with the primary side. It is not safety-isolated and must be operated only with an isolation transformer during lab testing per the manufacturer's warning.

How is the 5V output generated?

The 5V output is generated by the MP163's internal LDO, powered from the 12V rail. It is not a separately regulated switching output. C9 (1µF ceramic) serves as LDO input decoupling, and C10 (10µF ceramic) provides output filtering-enabling clean, low-noise 5V for logic or sensor biasing in low-current applications.

What protections are demonstrated on this board?

The board demonstrates all MP163-integrated protections: short-circuit protection (SCP) triggers immediate shutdown under VOUT1/VOUT2 short; over-load protection (OLP) limits sustained current; thermal shutdown (TSD) activates above 150°C junction temperature; VCC UVLO disables operation below ~8.5V; and open-loop protection halts switching if feedback is lost.

Is EN55022 compliance verified on this board?

Yes-test data in the reference document confirms EN55022 Class B conducted emissions compliance across 150kHz–30MHz, measured with the specified π-filter (C4–L1–C5) and standard LISN. Layout adherence (single-sided PCB, grounded copper pour, minimized loop areas) is essential to replicate this result in custom designs.