Analog Devices Inc. DC1559A

Overview

DC1559A from Analog Devices (formerly Linear Technology) is a fully assembled, tested demonstration board for the LTM8046 2kVAC isolated flyback µModule DC/DC converter. It supports input voltages from 3.1V to 31V and delivers up to 700mA at programmable output voltages from 1.8V to 12V. The board implements the recommended layout, thermal vias, and external components-including input/output capacitors and feedback resistor-for immediate evaluation of isolation performance, efficiency, and soft-start behavior in industrial sensor and ground-loop mitigation applications.

For engineers reviewing the DC1559A datasheet, DC1559A pinout, DC1559A application, or DC1559A equivalent, this demo board enables rapid validation of galvanic isolation integrity, load transient response, BIAS pin optimization, and minimum-load compliance under real-world line/load conditions-without requiring custom PCB design or component sourcing.

Technical Context

The DC1559A implements the LTM8046 in its standard 51-ball BGA package (9mm × 15mm × 4.92mm), with all primary-side (VIN, RUN, FB, SS, BIAS, GND) and secondary-side (VOUT, VOUT–) terminals brought out to test points and solder pads. It includes the full complement of recommended external components per Table 1 of the LTM8046 datasheet: 1µF X5R input capacitor, dual 100µF X5R output capacitors, and precision feedback resistor for 5V output.

Thermal management follows Linear's validated layout: large top-layer GND pour connected via dense thermal vias to internal planes, optimized placement of CIN adjacent to VIN/GND, and COUT directly across VOUT/VOUT–. The board is pre-configured for 5V @ 550mA operation from 24VIN, with 3kVDC hi-pot tested isolation barrier and UL 60950-1 recognition (File E464570).

Key Specifications

Availability

DC1559A is available at Aetrix Electronics and suitable for industrial sensor interfaces, isolated PLC I/O modules, and ground-loop mitigation circuits requiring stable component supply, fast prototyping turnaround, and verified safety-compliant isolation performance.

Supply support for DC1559A 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. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and power management semiconductors, serving industrial, automotive, communications, and healthcare markets.

The DC1559A belongs to Analog Devices' µModule evaluation board family, designed specifically to accelerate adoption of their integrated power solutions by providing production-ready layouts, thermal validation, and safety-compliant reference designs for isolated and non-isolated DC/DC converters.

FAQ

What is the primary function of the DC1559A demo board?

The DC1559A demo board is a ready-to-use evaluation platform for the LTM8046 isolated µModule DC/DC converter. It provides a fully populated, thermally optimized, and safety-certified implementation that allows engineers to validate input/output performance, isolation integrity, soft-start behavior, and thermal derating without designing a custom PCB. The DC1559A includes all recommended external components and follows Linear Technology's validated layout guidelines for maximum reliability.

Does the DC1559A support output voltage adjustment beyond the default 5V?

Yes, the DC1559A supports output voltage reconfiguration from 1.8V to 12V by replacing the onboard 8.45kΩ feedback resistor (RFB) with the value specified in Table 1 of the LTM8046 datasheet. For example, a 14.7kΩ resistor sets 2.5V output, while a 3.83kΩ resistor configures 12V output. The board's test points and pad layout accommodate resistor replacement without trace modification, preserving isolation integrity during adjustment.

Can the DC1559A be used to verify 3kVDC isolation compliance?

Yes, the DC1559A implements the LTM8046 device which is 100% hi-pot tested to 3kVDC for one second across the isolation barrier - satisfying the 2kVAC rating requirement. The board maintains the manufacturer's specified creepage and clearance distances, including the three-row ball gap (4.3mm metal-to-metal separation) and internal 1.9mm transformer isolation. Users can perform system-level hi-pot testing on the DC1559A using standard test equipment per IEC/UL 60950-1 procedures.

What thermal performance can be expected from the DC1559A at full load?

When operated at 24VIN and 5V/550mA output, the DC1559A achieves ≤15°C temperature rise above ambient on a standard 4-layer FR4 board, consistent with the LTM8046's θJA = 21.9°C/W specification. This performance relies on the board's optimized thermal vias and GND plane design. Derating is required above 60°C ambient or with reduced airflow; the DC1559A's layout enables direct thermal imaging and junction temperature estimation using the published θJCbottom (7.9°C/W) and θJB (8.4°C/W) values.

Is the DC1559A compatible with both SnPb and RoHS-compliant LTM8046 variants?

Yes, the DC1559A is mechanically and electrically compatible with all LTM8046 variants - including LTM8046EY#PBF (RoHS), LTM8046IY#PBF (RoHS), and LTM8046IY (SnPb) - as they share identical 51-ball BGA footprints, pinouts, and thermal pad configurations. The board's solder mask and pad finish are qualified for both SAC305 reflow and SnPb wave soldering processes, supporting legacy and modern assembly requirements without redesign.