Renesas ISL6744EVAL1Z

Overview

ISL6744EVAL1Z from Renesas Electronics (formerly Intersil) is an evaluation board for the ISL6744 intermediate bus PWM controller, designed to demonstrate half-bridge and full-bridge unregulated DC/DC converter operation in telecom/datacom bus converter applications. It supports 48V input, delivers 12V/8A output, implements adjustable 235kHz switching frequency, 35ns propagation delay, and precise deadtime control down to 35ns.

For engineers reviewing the ISL6744EVAL1Z datasheet, ISL6744EVAL1Z pinout, ISL6744EVAL1Z application, or ISL6744EVAL1Z equivalent, this page provides verified functional context, supply chain availability, manufacturer support details, and design-specific validation data for rapid prototyping of isolated intermediate bus architectures.

Technical Context

The ISL6744EVAL1Z implements a voltage-mode PWM control architecture centered on the ISL6744 IC, featuring dual 1A gate drivers (OUTA/OUTB), programmable oscillator (RTD/CT), and integrated soft-start with overcurrent hiccup protection. Its timing loop uses CT charge/discharge cycles to set switching period and deadtime independently.

It validates the ISL6744's core functions: 35ns CS-to-output propagation delay for fast fault response, 0.6V current-sense threshold with 50µs retriggerable overcurrent timer, and thermal shutdown at 145°C with 15°C hysteresis - all operating across –40°C to +105°C ambient.

Key Specifications

Availability

ISL6744EVAL1Z is available at Aetrix Electronics and suitable for telecom power system validation, datacom bus converter development, and isolated DC/DC reference design requiring stable component supply and documented layout practices.

Supply support for ISL6744EVAL1Z 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

Renesas Electronics Corporation acquired Intersil in 2017 and maintains full technical and supply chain responsibility for legacy Intersil power management products including the ISL6744 family.

The ISL6744EVAL1Z belongs to Renesas' intermediate bus converter evaluation platform line, engineered specifically to accelerate adoption of cost-optimized, high-efficiency half-bridge topologies in telecom and datacom infrastructure.

FAQ

What is the primary function of the ISL6744EVAL1Z evaluation board?

The ISL6744EVAL1Z is a fully assembled and tested evaluation platform for the ISL6744 PWM controller IC. It demonstrates a 48V-input, 12V/8A unregulated half-bridge DC/DC converter - commonly deployed as a DC transformer or bus converter in telecom and datacom systems. The board validates key ISL6744 features including adjustable deadtime, soft-start, overcurrent hiccup mode, and thermal protection under real-world load conditions.

Does the ISL6744EVAL1Z support full-bridge topologies, or only half-bridge?

The ISL6744EVAL1Z is configured exclusively for half-bridge operation, as shown in the FN9147 datasheet's Typical Application schematic (Page 3). While the ISL6744 IC itself supports both half-bridge and full-bridge topologies, this specific evaluation board implements the half-bridge variant with discrete QH/QL MOSFETs, transformer T1, and synchronous rectifier FETs QR1–QR4. Full-bridge adaptation would require PCB redesign and component substitution.

What are the confirmed input and output voltage/current ratings for ISL6744EVAL1Z?

The ISL6744EVAL1Z is rated for 48V ±10% DC input (43–53V) and delivers 12V nominal output at up to 8A steady-state current (100W). This rating is verified in the datasheet's "Typical Application" section (Page 8) and aligns with the ISL6744's operational limits: VDD supply range of 9–16V, and gate drivers capable of 1A peak sink/source per output.

Can ISL6744EVAL1Z be used to evaluate ZVS (zero-voltage switching) performance?

Yes - the ISL6744EVAL1Z is explicitly designed to validate ZVS operation. Its layout incorporates resonant components (L3, C7) and uses transformer leakage inductance with FET output capacitance (Coss) to enable ZVS transitions. The board's 235kHz switching frequency, 35ns minimum deadtime, and 50µs overcurrent timer are all tuned to support reliable ZVS under full-load conditions, as detailed in the "Oscillator Component Selection" section (Page 12).

Is ISL6744EVAL1Z RoHS compliant and compatible with lead-free assembly processes?

Yes - the ISL6744EVAL1Z uses RoHS-compliant components throughout, including the ISL6744AUZ controller (Pb-free plus anneal package) and all passives and MOSFETs qualified to IPC/JEDEC J-STD-020 moisture sensitivity and Pb-free reflow profiles. The board's documentation (FN9147 Rev. 8.00) confirms compatibility with both SnPb and Pb-free soldering operations.