STMicroelectronics STEVAL-IPB001V1

Overview

STEVAL-IPB001V1 from STMicroelectronics is a 2 W, 3-phase switched-mode power supply (SMPS) demonstration board designed for breaker applications, featuring the STC04IE170HP ESBT as the main switch, UC3845B PWM controller, 150–1250 VDC input range, 24 V/83 mA output, and >80% efficiency at 30 kHz switching frequency.

For engineers reviewing the STEVAL-IPB001V1 datasheet, STEVAL-IPB001V1 schematic, STEVAL-IPB001V1 application notes, or STEVAL-IPB001V1 alternative evaluation boards, this board provides a validated reference design for high-input-voltage, low-power auxiliary supplies in circuit breakers and 3-phase metering systems with dedicated transformer construction and active startup network.

Technical Context

This board implements a flyback-derived topology optimized for ultra-wide DC input (150–1250 V), using the UC3845B current-mode PWM controller to drive the STC04IE170HP ESBT - a 1700 V, 4 A high-voltage bipolar transistor with integrated emitter-shunt resistor for precise current sensing.

The design incorporates an active startup network to reduce no-load losses, a custom-wound transformer supporting 30 kHz operation, and discrete rectification (STTH110 diodes) and filtering (330 µF/25 V, 47 µF/25 V, 220 µF/35 V capacitors) to meet tight ripple and regulation requirements in breaker auxiliary power rails.

Key Specifications

Availability

STEVAL-IPB001V1 is available at Aetrix Electronics and suitable for circuit breaker auxiliary power, 3-phase energy metering, and high-voltage industrial control systems requiring stable component supply and proven reference design validation.

Supply support for STEVAL-IPB001V1 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing microcontrollers, power devices, analog ICs, and silicon solutions for industrial, automotive, and consumer markets.

This board belongs to ST's STEVAL (ST Evaluation) series - purpose-built reference designs that accelerate development of robust, standards-compliant power and control subsystems for grid infrastructure and protection equipment.

FAQ

What is the primary target application for STEVAL-IPB001V1?

The board is specifically engineered for auxiliary power supply in medium- and high-voltage circuit breakers, delivering regulated 24 V to trip mechanisms, status sensors, and communication modules. Its 150–1250 VDC input range allows direct integration into breaker control units fed from rectified 3-phase distribution lines.

Can STEVAL-IPB001V1 be modified for higher output power?

Yes - the documentation states it "can be easily upgraded for higher output power" by adapting the transformer turns ratio, output rectifier, and filter capacitance. The UC3845B controller and STC04IE170HP switch provide headroom for scaling to ~5 W with appropriate thermal and layout revisions.

Which controller and main switch are used on this board?

The board uses the UC3845B current-mode PWM controller (8-pin DIP) for precise duty-cycle regulation and the STC04IE170HP Emitter-Switched Bipolar Transistor (ESBT) - a 1700 V, 4 A high-voltage switch with integrated shunt resistor for accurate primary-side current sensing and overcurrent protection.

Is STEVAL-IPB001V1 RoHS compliant and what safety certifications does it support?

Yes - the board is explicitly stated as RoHS compliant in its data brief. While no end-equipment certification (e.g., UL, IEC 61000-4-x) is claimed on the board itself, its design follows practices aligned with IEC 62040-3 and IEC 61000-3-2 for harmonic emission, and supports reinforced insulation per IEC 60747-5-2 when implemented with appropriate creepage/clearance in final systems.