Analog Devices Inc. ADP1071-1EVALZ

Overview

ADP1071-1EVALZ from Analog Devices is an evaluation board for the ADP1071-1 isolated synchronous flyback controller, configured as a 15 W, triple-output (±15 V, +5.5 V, +24 V) dc-dc converter with 5 kV isolation, designed for industrial power supply validation and flyback topology characterization.

For engineers reviewing the ADP1071-1EVALZ datasheet, ADP1071-1EVALZ pinout, ADP1071-1EVALZ application, or ADP1071-1EVALZ equivalent, this page delivers verified hardware specifications, measured performance data (efficiency, cross-regulation, loop gain), safety-critical operating constraints, and direct guidance for startup, thermal testing, and control loop analysis using standard lab equipment.

Technical Context

The ADP1071-1EVALZ implements a primary-side controlled isolated flyback architecture with integrated iCoupler® technology enabling galvanic isolation between primary and secondary gate drivers. It operates at a fixed 50 kHz switching frequency to balance transformer size and conduction losses.

Power delivery includes three regulated outputs: +24 V/400 mA, +5.5 V/500 mA, and −15 V/200 mA, with feedback weighted 6:4 between the 24 V and 5.5 V rails; the −15 V rail remains quasi-regulated. Protection features include cycle-by-cycle overcurrent, output overvoltage, short-circuit, and overtemperature detection.

Key Specifications

Availability

ADP1071-1EVALZ is available at Aetrix Electronics and suitable for industrial power supply design, isolated dc-dc converter validation, and multi-output flyback controller qualification requiring stable component supply and traceable evaluation hardware.

Supply support for ADP1071-1EVALZ 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

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA.

The ADP1071-1EVALZ belongs to Analog Devices' isolated power controller product line, engineered specifically for compact, high-reliability industrial and medical isolated power supplies requiring precise multi-output regulation and robust safety compliance.

FAQ

What is the primary function of the ADP1071-1EVALZ?

The ADP1071-1EVALZ is a fully assembled evaluation board used to characterize and validate the ADP1071-1 isolated synchronous flyback controller in real-world conditions. It provides immediate access to all critical signals, preconfigured for 15 W triple-output operation (+24 V, +5.5 V, −15 V) with 5 kV isolation, enabling rapid prototyping and performance benchmarking without custom PCB development. The ADP1071-1EVALZ includes on-board transformers, MOSFETs, and protection circuitry per UG-1384 Rev. 0.

Does the ADP1071-1EVALZ support input voltage ranges beyond 18–32 VDC?

No - the ADP1071-1EVALZ is strictly rated for 18 VDC to 32 VDC input per its official user guide (UG-1384, Page 3). Operation outside this range risks damage to Q3 (STL3N10F7), the TVS diode (P4SMA43A), and the ADP1071-1 controller's internal regulators. The board's auxiliary winding and VREG1/VREG2 pins are calibrated for this window; extended input requires redesign of snubbers, feedback dividers, and start-up circuitry. The ADP1071-1EVALZ documentation explicitly warns against exceeding these limits.

How is output cross-regulation managed on the ADP1071-1EVALZ?

The ADP1071-1EVALZ uses a weighted feedback network where the +24 V and +5.5 V outputs contribute 60% and 40% respectively to the FB pin voltage, enabling tight regulation of both rails. The −15 V output is quasi-regulated via transformer turns ratio and passive rectification, with no active feedback path. Load step tests (Figures 6–9, UG-1384) confirm ±3% cross-regulation error across full/no-load transitions. This configuration is fixed on the ADP1071-1EVALZ and requires external resistor changes to modify weighting ratios.

What safety precautions apply when operating the ADP1071-1EVALZ?

Extreme caution is required due to hazardous primary-side voltages - the ADP1071-1EVALZ user guide mandates use of current-limited, isolated DC sources and prohibits probing primary/secondary circuits simultaneously without differential isolation. The board carries a 5 kV isolation barrier, but exposed J2 pins (VIN+, VIN−) and transformer primary windings remain lethal at full input. Users must power down before connection changes, verify ground isolation on oscilloscope probes, and never bypass the P4SMA43A TVS or R15 current sense resistor during testing. These warnings appear verbatim in UG-1384 Section "Caution".

Can the ADP1071-1EVALZ be modified for different output voltages or power levels?

Yes - the ADP1071-1EVALZ schematic (Figure 16, UG-1384) shows configurable elements: feedback resistors (R31, R49, R56), soft-start timing (C48, R17), and current sense gain (R15). However, changing outputs requires transformer replacement (T1: 750316825 is fixed for ±15 V/+5.5 V/+24 V), recalculation of snubber components (D11/D12), and validation of MOSFET voltage stress (Q3 rated 100 V). Analog Devices does not provide alternate transformer part numbers or modification guidelines for the ADP1071-1EVALZ - such changes fall outside its intended evaluation scope.