Omnipure 69003 Rev 11 3-Phase Gate Board PCB

The Omnipure 69003 Rev 11 is a printed circuit board (PCB) designed as a 3‑phase gate driver board for power control applications. It is commonly used in motor drives, inverter systems, and industrial power supplies. The board carries a UL 94V‑0 flammability rating (substrate material) and is revision 11. It provides gate drive signals to IGBTs or MOSFETs in a three-phase bridge configuration.

Board Overview

The 69003 Rev 11 measures approximately 150 mm x 100 mm and is fabricated on 1.6 mm FR-4 epoxy glass with 2 oz copper traces. Key components include six isolated gate driver ICs (e.g., Avago HCPL-316J), a DC-DC converter for isolated gate supply voltages (+15V, -8V), and optocouplers for fault feedback. The board has a 34-pin header for control signals (PWM inputs, enable, fault output) from a host controller (DSP or PLC).

Gate Drive Specifications

Each gate driver provides a peak output current of 2.5 A (sink/source) and can drive IGBTs up to 1200V/600A. The output voltage swing is +15V (on) and -8V (off) to ensure fast turn-off and noise immunity. Built-in desaturation detection (short-circuit protection) shuts down the respective phase within 2 µs. The board includes a soft shutdown feature to prevent overvoltage spikes.

Power Supply Requirements

The board requires a single 24V DC (22–26V) input for the logic side. Onboard isolated DC-DC converters generate the floating gate supplies (six isolated outputs: +15V/-8V each). Power consumption: 12 W typical (plus IGBT switching losses). The board also has a 5V regulator for the control logic (output available on header).

Protection and Diagnostics

• Overcurrent protection via desat detection (threshold adjustable by resistor).

• Undervoltage lockout (UVLO) on gate supplies (shutdown if

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• Fault output (open-collector) signals any driver fault to the host controller.

• Status LEDs: PWR (green), FAULT (red), and per-phase gate activity (yellow).

Connectors and Interface

Main connectors: 34-pin IDC header for control signals (3.3V/5V logic), 4-pin terminal block for 24V power, and six 2-pin headers for gate-emitter connections to IGBT modules (screw terminals). The board also includes test points for each gate drive voltage.

Environmental and Physical

The board is conformally coated (acrylic) for protection against dust and moisture. Operating temperature: -20°C to +70°C; storage: -40°C to +85°C. Humidity: 10% to 90% non-condensing. The board has four mounting holes (3.2 mm diameter) at the corners. Weight: 120 g. UL 94V-0 rating for the PCB material (FR-4).

Compatibility

The 69003 Rev 11 is a replacement or spare part for Omnipure inverter systems (e.g., motor drives, UPS). It is compatible with IGBT modules from Infineon (EconoPACK), SEMIKRON (Semitop), and Fuji (6MBP series). The board can be used with a variety of control platforms (PLC, microcontroller, or DSP) that output six PWM signals (3 high-side, 3 low-side) with dead time.

Typical Applications

Industrial motor drives (0.75–22 kW), uninterruptible power supplies (UPS), solar inverters, and welding power supplies. The gate board is designed for three-phase AC motor control (induction or permanent magnet).

Ordering and Documentation

Part number: Omnipure 69003 Rev 11 (also known as 69003 Rev 11 37/12). The board is supplied with a 34-pin ribbon cable (30 cm) and a data sheet. Manual: Omnipure 69003 Technical Reference (P/N 69003-DOC). RoHS compliant.