Nexperia USA Inc. NEVB-NXF6505BDAUL

Overview

NEVB-NXF6505BDAUL from Nexperia is an evaluation board designed exclusively for the NXF6505B-Q100 low-noise, 1.2 A push-pull transformer driver IC used in isolated DC/DC power supplies. It supports input voltage range of 2.25 V to 5.5 V, delivers up to 1.0 A isolated output (via onboard 1:1.1 transformer), and features enable control, external clock interface (100–1600 kHz), and fail-safe inputs - enabling rapid validation of timing, noise, and break-before-make performance in compact isolated supply designs.

For engineers reviewing the NEVB-NXF6505BDAUL datasheet, NEVB-NXF6505BDAUL pinout, NEVB-NXF6505BDAUL application, or NEVB-NXF6505BDAUL equivalent, this board provides direct access to NXF6505B-Q100 D1/D2 drive outputs, EN and CLK control signals, isolated Vout/GND2 terminals, and test points for Vin, Vout, EN, CLK, and transformer windings - supporting real-time measurement of switching rise/fall times, output regulation, and EMI behavior under load.

Technical Context

The NEVB-NXF6505BDAUL implements a fixed-frequency push-pull topology using the NXF6505B-Q100 IC, which internally halves the external clock frequency to generate complementary 180°-phase drive signals on D1 and D2 pins. It integrates no active regulation or feedback circuitry - relying instead on transformer turns ratio and external load conditions to set output voltage.

Board-level design emphasizes low-noise operation via optimized layout separation between primary-side control (VCC, EN, CLK) and secondary-side isolation barrier (T1, Vout, GND2), with dedicated test points (TP5–TP12) enabling differential probing of transformer outputs and driver inputs without ground loop interference.

Key Specifications

Availability

NEVB-NXF6505BDAUL is available at Aetrix Electronics and suitable for isolated power supply evaluation, automotive CAN/RS-485 interface power derivation, and BMS auxiliary rail generation requiring stable component supply and documented reference design validation.

Supply support for NEVB-NXF6505BDAUL 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

Nexperia is a global semiconductor expert focused on high-performance, energy-efficient components including logic, discrete, and analog devices - with automotive-grade qualification as a core competency.

This evaluation board belongs to Nexperia's power interface evaluation platform family, engineered to accelerate adoption of their low-EMI, AEC-Q100 qualified transformer drivers in safety-critical isolated supply applications.

FAQ

Can NEVB-NXF6505BDAUL operate with input voltages above 5.5 V?

No. The board is designed only for the NXF6505B-Q100 IC's specified 2.25 V–5.5 V VCC range. Exceeding 5.5 V risks permanent damage to U1 and violates the safety warning limiting total applied voltage to ≤50 V. No onboard overvoltage protection is implemented.

Does the board include output voltage regulation or feedback?

No. NEVB-NXF6505BDAUL is an open-loop driver evaluation platform. Output voltage is determined solely by transformer turns ratio, input voltage, and load - with no optocoupler, TL431, or secondary-side sensing circuitry included. Regulation must be implemented externally.

What is the purpose of the fail-safe input on this EVB?

The fail-safe input connects directly to the NXF6505B-Q100's dedicated FS pin and forces both D1 and D2 outputs low upon loss of valid logic level - preventing undefined states or shoot-through during controller reset, communication dropout, or MCU brownout events.

Can the onboard transformer be replaced for different output voltages?

Yes. The Würth 750315371 transformer is socketed and can be substituted with any SMD push-pull transformer meeting the NXF6505B-Q100's 420 kHz nominal switching frequency, 72 µH primary inductance, and ≥2500 V RMS isolation rating - enabling custom output voltages via turns ratio adjustment.