Analog Devices Inc. DC2737A

Overview

DC2737A from Analog Devices is an evaluation board for the LT8301 micropower isolated flyback controller IC, enabling rapid prototyping of 2.7V–42V input, up to 6W isolated DC/DC converters without optocouplers or third windings. It implements boundary mode and low-ripple Burst Mode® operation, integrates a 65V/1.2A DMOS switch, and supports output voltage programming via a single external resistor - validated for [email protected] (VIN=36V) in typical configurations.

For engineers reviewing the DC2737A datasheet, DC2737A pinout, DC2737A application, or DC2737A equivalent, this board delivers production-ready reference design validation for automotive housekeeping supplies, industrial isolated bias rails, and medical auxiliary power - with full schematic, BOM, layout files, and test data provided by Analog Devices.

Technical Context

The DC2737A implements the LT8301's primary-side sensing architecture, eliminating opto-isolators by sampling the reflected flyback pulse on the SW node to regulate isolated output voltage. It uses a Würth 750313974 transformer (3:1 turns ratio, 40µH primary) optimized for 5V output across 8–36V input.

Board-level features include EN/UVLO threshold programming (1.228V ±14mV), internal soft-start and compensation, output short-circuit protection, and thermal derating support up to 125°C junction temperature - all verified per AEC-Q100 Grade I (–40°C to 125°C) requirements.

Key Specifications

Availability

DC2737A is available at Aetrix Electronics and suitable for automotive housekeeping supplies, industrial isolated bias rails, and medical auxiliary power applications requiring stable component supply, full documentation traceability, and production-grade validation data.

Supply support for DC2737A 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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, industrial automation, automotive, and communications markets.

The DC2737A belongs to ADI's Power by Linear™ evaluation platform family, designed to accelerate development of compact, high-efficiency isolated power solutions for safety-critical and space-constrained applications.

FAQ

What is the primary function of the DC2737A evaluation board?

The DC2737A evaluation board is a fully assembled and tested hardware platform for the LT8301 isolated flyback controller. It enables engineers to validate performance, optimize transformer selection, and verify system-level behavior - including boundary mode operation, low-ripple Burst Mode® efficiency, and primary-side regulation accuracy - before committing to custom PCB design. The DC2737A includes all critical passive components, thermal management, and test points aligned with the LT8301's electrical characteristics.

Does the DC2737A support multiple output voltages?

Yes, the DC2737A supports configurable output voltages via the RFB feedback resistor. The board ships configured for 5V output using a 154kΩ resistor and Würth 750313974 transformer (3:1), but users can reconfigure it for 3.3V, 12V, or 24V outputs by changing RFB and selecting an appropriate transformer from Analog Devices' validated list (e.g., 750313975 for 24V). Output accuracy remains within ±5% across temperature when using ±1% resistors and matched-turns-ratio transformers.

Can the DC2737A be used in automotive applications?

Yes - the DC2737A is qualified for automotive use when paired with LT8301ES5#WTRPBF or LT8301IS5#WTRPBF variants, which are AEC-Q100 Grade I (–40°C to 125°C) certified. The board's layout, thermal design, and component selection comply with automotive reliability requirements, and Analog Devices provides Automotive Reliability Reports and PPAP documentation upon request for DC2737A-based designs.

What transformer is included with the DC2737A, and is substitution supported?

The DC2737A ships with the Würth Electronik 750313974 transformer (3:1, 40µH primary, 1µH leakage inductance), pre-validated for 5V output across 8–36V input. Substitution is supported using any of the 18+ transformers listed in the LT8301 datasheet Table 1 - including Sumida and Pulse Engineering alternatives - provided the turns ratio, leakage inductance, and saturation current meet LT8301's boundary mode timing constraints (e.g., tOFF(MIN) ≥ 450ns) and SW pin voltage limits (≤65V).

How does the DC2737A implement primary-side regulation without an optocoupler?

The DC2737A leverages the LT8301's integrated flyback pulse sense circuitry to sample the isolated output voltage directly from the reflected voltage on the SW pin during zero-secondary-current intervals. This eliminates reliance on optocouplers or third windings while maintaining ±5% output regulation across line, load, and temperature - as confirmed by DC2737A test data showing <0.1% load regulation error and <0.5% line regulation error under full operating conditions. The DC2737A's layout minimizes parasitic capacitance at the RFB and SW nodes to preserve sampling fidelity.