Diodes Incorporated DFLS1150-7

Overview

DFLS1150-7 from Diodes Incorporated is a 1.0A, 150V high-voltage Schottky barrier rectifier in PowerDI123 package, featuring 0.82V forward voltage at 1.0A, 50A non-repetitive surge current capability, and guard ring die construction for transient protection-used in AC/DC input stage rectification of compact power adapters and USB PD chargers.

For engineers reviewing the DFLS1150-7 datasheet, DFLS1150-7 pinout, DFLS1150-7 application, or DFLS1150-7 equivalent, key selection criteria include its low VF for efficiency-critical 5–24V output SMPS, RMS reverse voltage rating of 106V, thermal resistance of 7°C/W junction-to-solder point, and RoHS-compliant matte tin annealed terminals.

Technical Context

This Schottky rectifier employs a guard ring die structure to suppress edge breakdown under high dv/dt transients, enabling reliable operation in flyback and buck-derived offline converters. Its interlocking clip design enhances mechanical robustness and thermal path integrity during high IFSM events.

With a typical total capacitance of 28pF at 5V reverse bias and leakage current ≤2µA at 150V, it supports high-frequency switching (up to 500kHz) while minimizing switching losses and EMI generation in secondary-side synchronous rectification and OR-ing applications.

Key Specifications

Pinout & Package

Package: PowerDI123 - Surface-mount, single-ended, 3-pin outline with integrated cathode tab (pin 1 = anode, pin 2 = cathode, pin 3 = cathode tab). Molded green compound, UL 94V-0 rated, 0.01g weight.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-voltage Schottky rectifier applications.

Compared with SS115H-TP and SB1150-TB, DFLS1150-7 uniquely combines guard ring transient protection, lowest RθJS among 1A/150V Schottkys in PowerDI123, and halogen-free compliance-making it optimal for space-constrained, reliability-critical industrial and USB PD designs.

Availability

DFLS1150-7 is available at Aetrix Electronics and suitable for USB PD adapter secondary rectification, industrial 24V DC-DC converter input stages, and smart home gateway power supplies requiring stable component supply across multi-year production cycles.

Supply support for DFLS1150-7 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design centers across Asia and manufacturing in China, Taiwan, and the U.S.

The DFLS1150 belongs to Diodes' Power Discrete product line, engineered specifically for high-efficiency, high-reliability AC/DC and DC/DC power conversion in compact, thermally constrained applications.

FAQ

What is the maximum allowable junction temperature for continuous operation?

The DFLS1150-7 has an operating junction temperature range of –55°C to +175°C. For continuous 1.0A operation, thermal design must ensure TJ does not exceed +150°C under worst-case ambient and airflow conditions, using the 7°C/W RθJS value and measured solder-point temperature as reference.

Is DFLS1150-7 suitable for synchronous rectification replacement?

No-DFLS1150-7 is a passive Schottky rectifier and cannot replace active synchronous rectifiers (e.g., MOSFETs with gate drivers). It serves as a drop-in alternative to standard Schottky diodes like SB1150 or SS115H, offering lower VF and better surge robustness than those parts.

Does the PowerDI123 package require special stencil or reflow profile?

Yes-the PowerDI123's exposed cathode tab demands a dedicated stencil aperture (≥100% coverage over tab area) and reflow profile with peak temperature ≥235°C for 45–60 seconds to ensure void-free solder joint formation and optimal thermal performance per Diodes' recommended pad layout.

How does the guard ring die construction improve reliability in real-world use?

The guard ring mitigates premature edge breakdown during line surges and lightning-induced transients, extending lifetime in unfiltered AC inputs. In 85–264VAC applications, it reduces field failure rate by >4× compared to non-guard-ring Schottkys under IEC 61000-4-5 2kV surge testing.