Renesas ISL6752DBEVAL1Z

Overview

ISL6752DBEVAL1Z from Renesas Electronics (formerly Intersil) is an evaluation board for the ISL6752 ZVS full-bridge current-mode PWM controller, designed to accelerate development of high-efficiency telecom and industrial DC/DC power supplies. It supports adjustable synchronous rectifier timing, 2MHz programmable oscillator, 3% current limit threshold, and resonant delay control - enabling rapid prototyping of primary- or secondary-side controlled ZVS converters delivering up to 400V input, 12V output at multi-kW levels.

For engineers reviewing the ISL6752DBEVAL1Z datasheet, ISL6752DBEVAL1Z application notes (AN1603, AN1619), ISL6752DBEVAL1Z hardware layout, or ISL6752DBEVAL1Z compatibility with ISL6754DBEVAL1Z control cards, this evaluation platform provides validated reference design, test points for VERR, RESDEL, VADJ, and CTBUF signals, and documented thermal performance under load across -40°C to +105°C ambient.

Technical Context

The ISL6752DBEVAL1Z implements a fixed 50% duty cycle for upper bridge FETs (OUTUL/OUTUR) while trailing-edge modulating lower bridge outputs (OUTLL/OUTLR) with user-adjustable resonant delay via RESDEL voltage (0–2V). Its current-mode architecture uses a 1.00V ±3% CS threshold, 70ns leading-edge blanking, and fast 35–50ns CS-to-output delay to support precise cycle-by-cycle peak current limiting in high-frequency ZVS topologies.

This board integrates the ISL6752's BiCMOS core with external gate drivers (e.g., EL7212), discrete MOSFETs (Q1–Q14), current-sense transformers (T3, T4), and bias circuitry to demonstrate both primary-side and secondary-side ZVS full-bridge configurations per Figures 2 and 3 of FN9181 Rev 4.00. It validates adjustable SR timing (via VADJ 0–5V) and buffered sawtooth slope compensation (CTBUF 0.4V offset, 2× gain).

Key Specifications

Availability

ISL6752DBEVAL1Z is available at Aetrix Electronics and suitable for telecom power supply development, industrial DC/DC converter validation, and wireless base station power system prototyping requiring stable component supply and documented reference design fidelity.

Supply support for ISL6752DBEVAL1Z 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 acquired Intersil in 2017 and maintains full technical support, documentation, and product continuity for legacy Intersil power management ICs and evaluation platforms.

The ISL6752DBEVAL1Z belongs to Renesas' high-efficiency ZVS full-bridge evaluation platform family, engineered specifically for rapid development of high-density, high-reliability isolated DC/DC converters targeting telecom, datacom, and industrial power systems.

FAQ

What is the primary function of the ISL6752DBEVAL1Z evaluation board?

The ISL6752DBEVAL1Z is a fully assembled and tested evaluation platform for the ISL6752 ZVS full-bridge PWM controller. It enables engineers to validate primary- or secondary-side controlled ZVS converter designs, verify adjustable synchronous rectifier timing, assess thermal performance under load, and prototype with documented schematics and layout per AN1603 and AN1619. The board directly implements the ISL6752's functional block diagram and typical applications shown in FN9181 Rev 4.00.

Which reference designs and application notes are officially supported for ISL6752DBEVAL1Z?

The ISL6752DBEVAL1Z is explicitly covered in AN1603 ("ISL6752/54EVAL1Z ZVS DC/DC Power Supply with Synchronous Rectifiers User Guide") and AN1619 ("Designing with ISL6752DBEVAL1Z and ISL6754DBEVAL1Z Control Cards"). These documents provide complete schematics, bill-of-materials, test procedures, waveforms, and layout guidelines. No other application notes or reference designs are formally associated with ISL6752DBEVAL1Z in the official Renesas documentation set.

Does ISL6752DBEVAL1Z support both primary-side and secondary-side ZVS control configurations?

Yes, ISL6752DBEVAL1Z supports both configurations as validated in FN9181 Rev 4.00 Figures 2 and 3. Figure 2 shows high-voltage input primary-side control with transformer T1 and gate drive on the primary side; Figure 3 demonstrates secondary-side control using transformer T3 and T4 with bias winding feedback. Both configurations use identical ISL6752DBEVAL1Z hardware, differing only in component placement and interconnect routing per the AN1603 User Guide.

What are the key test points and signal access features on the ISL6752DBEVAL1Z board?

The ISL6752DBEVAL1Z provides dedicated test points for critical ISL6752 signals including VERR (error amplifier output), RESDEL (resonant delay control), VADJ (SR timing adjustment), CTBUF (buffered oscillator sawtooth), and CS (current sense input). It also exposes all six PWM outputs (OUTUL, OUTUR, OUTLL, OUTLR, OUTLLN, OUTLRN) and includes jumper-selectable configurations for dead time and frequency tuning via RTD and CT components.

Can ISL6752DBEVAL1Z be used interchangeably with ISL6754DBEVAL1Z?

No - ISL6752DBEVAL1Z and ISL6754DBEVAL1Z are distinct evaluation boards optimized for different controller variants. While AN1619 discusses co-design usage, the boards differ in component selection, gate driver configuration, and transformer implementation to match the ISL6752's 6-output architecture versus the ISL6754's 4-output topology. They are not electrically or mechanically interchangeable; substitution requires redesign per each board's respective schematic and layout.