PA1577NLT

Overview

The PA1577NLT is a surface mount pulse transformer manufactured by Pulse Electronics, designed for high-frequency switching applications. It features a compact footprint measuring 14.0 mm in length, 17.65 mm in width, and 12.07 mm in height. The component operates within a temperature range of -40°C to 130°C and supports frequencies up to 300 kHz. Key electrical specifications include a primary inductance of 230.4 µH, with two primary and two secondary windings. It accepts an input voltage range of 28 V to 68 V and provides dual 12 V outputs.

Feature Summary

• Dual secondary winding configuration providing isolated 12 V outputs
• Surface mount construction optimized for automated PCB assembly
• High-temperature capability suitable for demanding thermal environments
• Compact physical dimensions facilitating dense circuit board layouts

Applications

• Forward converter power supply designs
• Isolated DC-DC conversion modules
• High-frequency switching power management circuits
• Telecommunications equipment power stages

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to ensure correct packaging and pinout compatibility. Confirm that the required insulation class and safety certifications align with the target application's regulatory standards. Cross-reference the primary inductance value and frequency limits with the system's operational requirements to prevent performance degradation or failure under load conditions.

Selection Notes

Select this component when a compact, dual-output isolated transformer is required for forward topology converters. Ensure the PCB layout accommodates the 14.0 x 17.65 mm footprint and allows sufficient clearance for the 12.07 mm height. Validate that the operating frequency remains within the 300 kHz limit to maintain efficiency and thermal stability during continuous operation.

Part Context

This part belongs to Pulse Electronics' portfolio of surface mount transformers, specifically engineered for switch-mode power supplies. It serves as a critical isolation component in power conversion stages, replacing traditional through-hole magnetics with space-saving SMD alternatives. The design supports modern manufacturing techniques while maintaining robust electrical isolation between input and output circuits.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify mechanical fit and electrical parameters before considering alternative manufacturers.

FAQ

What is the maximum operating frequency for the PA1577NLT?

The maximum operating frequency is specified as 300 kHz.

How many windings does the PA1577NLT contain?

The transformer features two primary windings and two secondary windings.