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Industrial Grade 5V 5A Ac-Dc Power Module

An industrial-grade enclosed 5V DC power supply module capable of delivering over 5A from AC mains with robust protection features.

salamat mominOct 24, 2026

POWER

EMI_FILTER → AC_RECTIFICATIONPower
Filtered AC mains input to bridge rectifier
AC_RECTIFICATION → POWER_STAGE_FLYBACKPower
High-voltage DC bus to primary flyback switch
POWER_STAGE_FLYBACK → SECONDARY_RECTIFICATION_SRPower
Galvanically isolated energy transfer via high-frequency transformer
SECONDARY_RECTIFICATION_SR → PROTECTION_CIRCUITRYPower
Regulated 5V output routed through protection and current sensing
SECONDARY_RECTIFICATION_SR → FEEDBACK_REGULATIONPower
Output voltage sensing for secondary regulation feedback
FEEDBACK_REGULATION → POWER_STAGE_FLYBACKDigital
Isolated feedback signal across barrier to primary controller

Part number	Type	Component	Manufacturer	Package	Qty	Datasheet	Match
S10K275	POWER	EPCOS S10K275 Varistor & Dual-Stage CM Choke Surge protection, lightning suppression, and conducted EMI filtering for 85-264V AC input.	EPCOS	Disc 10mm	1	PDF	Matched
GSIB6A60/51-E3	POWER	GSIB6A60 Bridge Rectifier & Rubycon MXV Bulk Capacitors Rectifies AC mains to high-voltage DC and provides hold-up time across universal input range.	VISHAY	R-PSFM-T4	1	PDF	Matched
InnoSwitch3-ED	POWER	Power Integrations INN3162C-SF InnoSwitch3-ED Primary switch, high-voltage startup, and primary controller with FluxLink feedback isolation.	Power Integrations	—	1	PDF	Pending
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InnoSwitch3-ED	POWER	InnoSwitch3-ED Integrated SR Controller & Low RDS(on) N-MOSFET Synchronous rectification on the secondary side to eliminate diode forward-voltage drop losses.	Infineon, Onsemi	—	1	PDF	Pending
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TL431AIDBV	POWER	TL431 Shunt Regulator & FluxLink Feedback Secondary-side regulation sensing 5V output to maintain tight line/load regulation (+/-1%).	Texas Instruments	—	1	PDF	Matched
INN3162C-H101-TL	POWER	Overcurrent, Short-Circuit, OVP & Thermal Shutdown Protection Provides latching or auto-restart protection against fault conditions in harsh industrial environments.	Power Integrations	24-PowerSMD Module (0.425", 10.80mm Width), 17 Leads	1	PDF	Matched
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GAP PAD TGP 1000VO	POWER	Conduction-Cooled Potted Enclosure & Thermal Interface Pads Maximizes heat dissipation from high-dissipation components to the metallic brick chassis without fans.	Bergquist / Henkel, Laird, Dow Corning / Dowsil, MG Chemicals	—	1	PDF	Pending
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3-5 hoursAdvanced

1

Procurement & Preparation

Procure all raw BOM components including EPCOS S10K275 Varistor, GSIB6A60 bridge rectifier, Rubycon MXV bulk capacitors, Power Integrations INN3162C-SF, TL431AIDBV, and GAP PAD TGP 1000VO thermal interface pads.
Inspect the dual-stage common-mode chokes and verify PCB footprints for the universal 85-264V AC input and 5V output rails.

2

Hardware Assembly & Wiring

Solder the input EMI filter stage including the EPCOS S10K275 varistor and dual-stage common-mode chokes to the primary side of the PCB.
Mount and solder the GSIB6A60 bridge rectifier and Rubycon MXV bulk capacitors to establish the high-voltage DC bus (HV+, HV-).
Install the Power Integrations INN3162C-SF primary controller and flyback transformer, ensuring the transformer primary (TRANS_PRI) and secondary (TRANS_SEC) windings are properly connected.
Assemble the secondary rectification stage featuring integrated SR controllers and low RDS(on) N-MOSFETs, linking to the TL431 shunt regulator and feedback network.
Apply GAP PAD TGP 1000VO thermal interface pads to high-dissipation components and secure the PCB assembly into the potted metallic brick enclosure for conduction cooling.

3

Firmware Setup

Configure internal controller parameters and verify default latching/auto-restart fault protection profiles for overcurrent, short-circuit, OVP, and thermal shutdown.

4

Testing & Calibration

Perform initial dielectric withstand (Hi-Pot) testing between primary and secondary circuits across the isolation barrier.
Connect universal AC mains (85-264V AC) and apply full resistive load (>5A) to the 5V output rail while measuring line and load regulation.
Trigger fault conditions (short-circuit, overvoltage, and overtemperature) to verify that protection circuitry correctly engages latching or auto-restart behavior.

Industrial Grade 5V 5A Ac-Dc Power Module

An industrial-grade enclosed 5V DC power supply module capable of delivering over 5A from AC mains with robust protection features.

Executive Summary

This reference design defines the system architecture, critical component candidates, risk register, and validation path for Industrial Ac-Dc Power Supply. It is a system-level design deliverable; verify critical claims with manufacturer evidence and prototype testing before production release.

Design Overview

Requirements Coverage

Requirement	Architecture coverage	Status
AC mains input conversion (85-264V AC)	Pending validation	Needs verification
High current regulated 5V DC output (5A or more)	Pending validation	Needs verification
Overcurrent and short-circuit protection	Pending validation	Needs verification
Robust industrial-grade filtering and thermal management	Pending validation	Needs verification
Enclosed brick/module form factor	Pending validation	Needs verification

Item	Details
Product Type	Industrial Ac-Dc Power Supply
Key Functions	AC mains input conversion (85-264V AC), High current regulated 5V DC output (5A or more), Overcurrent and short-circuit protection, Robust industrial-grade filtering and thermal management, Enclosed brick/module form factor
Power Source	AC Mains (85-264V AC)
Connectivity
Size	Compact enclosed module (brick/module style)
Environment	industrial
Difficulty	Advanced
Est. Time	3-5 hours

System Architecture

Power Topology: AC Mains (85-264V) -> EMI Filter -> AC Rectification & Bulk Capacitors -> Isolated Flyback Converter (InnoSwitch3-ED) -> Secondary Synchronous Rectification -> 5V DC (>=5A) Output with SSR and Overcurrent Protection.

Module List

Module ID	Type	Name	Function	Voltage
EMI_FILTER	POWER	EPCOS S10K275 Varistor & Dual-Stage CM Choke	Surge protection, lightning suppression, and conducted EMI filtering for 85-264V AC input.	230V AC
AC_RECTIFICATION	POWER	GSIB6A60 Bridge Rectifier & Rubycon MXV Bulk Capacitors	Rectifies AC mains to high-voltage DC and provides hold-up time across universal input range.	310V DC
POWER_STAGE_FLYBACK	POWER	Power Integrations INN3162C-SF InnoSwitch3-ED	Primary switch, high-voltage startup, and primary controller with FluxLink feedback isolation.	310V DC
SECONDARY_RECTIFICATION_SR	POWER	InnoSwitch3-ED Integrated SR Controller & Low RDS(on) N-MOSFET	Synchronous rectification on the secondary side to eliminate diode forward-voltage drop losses.	5V DC
FEEDBACK_REGULATION	POWER	TL431 Shunt Regulator & FluxLink Feedback	Secondary-side regulation sensing 5V output to maintain tight line/load regulation (+/-1%).	5V DC
PROTECTION_CIRCUITRY	POWER	Overcurrent, Short-Circuit, OVP & Thermal Shutdown Protection	Provides latching or auto-restart protection against fault conditions in harsh industrial environments.	5V DC
THERMAL_MANAGEMENT	POWER	Conduction-Cooled Potted Enclosure & Thermal Interface Pads	Maximizes heat dissipation from high-dissipation components to the metallic brick chassis without fans.	N/A

Power Tree and Signal Interfaces

From	To	Type	Interface / rail	Voltage
EMI_FILTER	AC_RECTIFICATION	power	Power	85-264V AC
AC_RECTIFICATION	POWER_STAGE_FLYBACK	power	Power	310V DC
POWER_STAGE_FLYBACK	SECONDARY_RECTIFICATION_SR	power	Power	Transformer Secondary
SECONDARY_RECTIFICATION_SR	PROTECTION_CIRCUITRY	power	Power	5.0V DC
SECONDARY_RECTIFICATION_SR	FEEDBACK_REGULATION	power	Power	5.0V DC
FEEDBACK_REGULATION	POWER_STAGE_FLYBACK	data	Digital	Isolated Control

Design Schemes

InnoSwitch3-ED Integrated Flyback with Synchronous Rectification ★

Utilizes Power Integrations InnoSwitch3-ED with FluxLink isolation and secondary SR for high efficiency and compact brick enclosure.

Trade-offs: Highest integration and efficiency with lower component count compared to discrete controller + external MOSFET schemes, perfectly tailored for 25W+ industrial 5V/5A brick modules.

Discrete Controller with External MOSFET and Secondary SR

Employs TI UCC28740 primary controller with an external high-voltage CoolMOS and dedicated secondary SR controller.

Trade-offs: Offers flexible sourcing of high-voltage transistors and controllers at the expense of a larger bill of materials and slightly higher board space.

Key IC selection

Primary Switch and Controller

Need: Switch high-voltage rectified DC safely with integrated high-voltage startup and isolated feedback interface for universal AC input.
Class: Offline Flyback switcher IC with integrated primary MOSFET and safety-rated isolation link
Shortlist: Power Integrations InnoSwitch3-ED family, ON Semiconductor offline PWM controller + external MOSFET
Pick: Select based on peak primary current rating, RDS(on) requirements for universal 85-264V AC input, and package thermal characteristics.

Synchronous Rectification MOSFET

Need: Minimize secondary conduction losses at 5V/5A+ output to meet high efficiency and thermal targets without bulky heatsinks.
Class: Low RDS(on) N-Channel Power MOSFET optimized for synchronous rectification
Shortlist: Infineon OptiMOS 5 series, Texas Instruments CSD series low-voltage power MOSFETs
Pick: Select lowest RDS(on) and gate charge combination in a compact package matching the secondary SR controller drive capability.

Bulk Hold-up Capacitors

Need: Provide adequate energy storage to maintain output regulation during AC dropouts across universal input range.
Class: High-voltage long-life electrolytic capacitors with high ripple current capability
Shortlist: Rubycon MXV series, Nichicon LS series
Pick: Select voltage rating >= 400V, capacitance calculated for minimum hold-up time at full 25W+ load, and 105C temperature rating.

Risk register

ID	Area	Severity	Detail	Mitigation
r1	thermal	high	Conduction-cooled potted brick design traps heat from the primary power stage, transformer, and secondary SR MOSFET, risking localized hot spots and exceeding capacitor temperature ratings.	Perform comprehensive thermal simulation and prototype thermocouple testing at maximum ambient temperature (85C) to verify internal component derating and potting compound thermal conductivity.
r2	emi	med	High di/dt and dv/dt switching from the primary flyback switch and secondary SR MOSFET at 5A output can violate CISPR 32 Class B conducted and radiated EMI limits.	Optimize PCB layout for minimum high-frequency loop areas, tune snubber circuits across the primary transformer winding and secondary MOSFET, and ensure proper placement of the dual-stage CM choke.
r3	power	high	Cross-regulation and transient load response during sudden 0% to 100% load steps on the 5V rail may cause voltage overshoots or undershoots due to trace impedances and output capacitor ESR.	Select low-ESR ceramic and solid polymer output capacitors in parallel, and optimize the secondary-side compensation network around the TL431 and FluxLink feedback loop.

Bring-up and Validation Plan

Power-off inspection and rail resistance checks
Current-limited first power-up; verify every rail before enabling loads
Validate interfaces and timing one subsystem at a time
Run thermal, fault-injection, EMC pre-scan, and endurance tests for the target environment

Key Components

4/7 modules matched to real parts. See the BOM tab for the full component table.

EPCOS S10K275 Varistor & Dual-Stage CM Choke (S10K275)

The candidate MPN 'S10K275' matches the primary MPN and the manufacturer 'EPCOS' is in the preferred list (TDK/EPCOS).

GSIB6A60 Bridge Rectifier & Rubycon MXV Bulk Capacitors (GSIB6A60/51-E3)

The candidate GSIB6A60/51-E3 matches the primary MPN GSIB6A60 and is manufactured by Vishay, which is one of the preferr

Power Integrations INN3162C-SF InnoSwitch3-ED (InnoSwitch3-ED)

Web recommendation: InnoSwitch3-ED (not in ES)

InnoSwitch3-ED Integrated SR Controller & Low RDS(on) N-MOSFET (InnoSwitch3-ED)

Rejected weak/wrong-class catalog hits; using web recommendation: InnoSwitch3-ED

TL431 Shunt Regulator & FluxLink Feedback (TL431AIDBV)

The candidate TL431AIDBV from Texas Instruments matches the primary MPN (TL431) and preferred manufacturer, and belongs

Overcurrent, Short-Circuit, OVP & Thermal Shutdown Protection (INN3162C-H101-TL)

The candidate INN3162C-H101-TL matches the primary MPN family INN3162C-SF with an acceptable ordering/package suffix, co

Conduction-Cooled Potted Enclosure & Thermal Interface Pads (GAP PAD TGP 1000VO)

Rejected weak/wrong-class catalog hits; using web recommendation: GAP PAD TGP 1000VO

Build Summary

Difficulty: Advanced
Estimated time: 3-5 hours
Tools required: SMT Pick and Place Machine, Reflow Oven, Selective Soldering Machine, Soldering Iron, Hi-Pot Tester, Electronic DC Load

See the Build tab for the full step-by-step assembly guide.

Evidence and Limitations

Confirm part parameters, certifications, and compatibility against current manufacturer documents.
Treat industry compliance without test or certificate evidence as a compliance gap, not an approval.
See Reference Images for visual artifacts and Build Guide for detailed assembly and bring-up steps.

Overview

System architecture

Bill of materials

Build guide