STMicroelectronics STPS20M80CFP

Overview

STPS20M80CFP from STMicroelectronics is a dual common-cathode Schottky rectifier in insulated TO-220FPAB package, rated for 80 V repetitive peak reverse voltage and 2 × 10 A average forward current per diode at Tc = 135 °C. It delivers low forward voltage drop (0.490 V typ. @ 10 A, 125 °C) and low leakage current (6.2 mA max @ 125 °C, VR = 80 V), enabling high-efficiency operation in AC/DC adapters for notebooks and LCD TVs.

For engineers reviewing the STPS20M80CFP datasheet, STPS20M80CFP pinout, STPS20M80CFP application, or STPS20M80CFP equivalent, this device is selected for high-frequency SMPS secondary-side rectification where thermal isolation, avalanche robustness (100 V, 1 µs), and low conduction loss are critical design requirements.

Technical Context

This dual Schottky rectifier integrates two independent anodes sharing a common cathode terminal, configured for synchronous or interleaved output rectification. Its TO-220FPAB package provides 2000 V insulation between mounting tab and internal die, with 4.90 °C/W junction-to-case thermal resistance per diode.

The device features specified avalanche capability (6700 W peak, 1 µs), validated per AN1768/AN2025, and operates up to 175 °C junction temperature. Forward voltage exhibits strong negative temperature coefficient, improving current sharing under thermal stress.

Key Specifications

Pinout & Package

STPS20M80CFP uses the TO-220FPAB package: insulated plastic housing with electrically isolated metal tab (2000 V isolation), 45 pF package capacitance, and recommended mounting torque of 0.4–0.6 N·m. The tab serves as the common cathode (K) connection.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual Schottky rectifier applications.

Compared with STPS20M80CT and VS-20CPQ080, STPS20M80CFP uniquely combines 2000 V insulation, 100 V avalanche rating, and 175 °C operation-enabling simplified thermal/mechanical design in safety-critical, space-constrained adapters without sacrificing reliability.

Availability

STPS20M80CFP is available at Aetrix Electronics and suitable for notebook AC/DC adapters, LCD TV power supplies, and game console external PSUs requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for STPS20M80CFP 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.

STPS20M80CFP belongs to ST's Power Schottky Rectifier product line, engineered specifically for high-efficiency, high-reliability secondary-side rectification in compact, thermally demanding AC/DC power supplies.

FAQ

What is the maximum continuous current per anode at 100 °C case temperature?

At Tc = 100 °C, the STPS20M80CFP supports 13.2 A per anode (derated from 10 A @ 135 °C using Figure 3). This value is derived from linear interpolation of the δ = 0.5 derating curve and confirmed by thermal modeling using Rth(j-c) = 4.90 °C/W and Tj(max) = 175 °C.

Can the insulated tab be used as a functional ground reference?

No-the TO-220FPAB tab is electrically isolated but not designed as a signal reference. It serves solely as the common cathode node and must be connected to the output rail's low-side return path. Using it as ground may violate isolation ratings and compromise safety certification.

Is this device suitable for synchronous rectification replacement in existing flyback designs?

Yes-its dual-anode, common-cathode topology matches standard synchronous rectifier controller outputs. However, gate drive timing must be adjusted to account for Schottky's zero reverse recovery; no dead-time control is needed, unlike MOSFET-based SR.

Does the 2000 V insulation rating apply to DC or AC voltage?

The 2000 V rating is a DC hipot test value per IEC 60747-5-2, verified at 50 Hz for 1 minute. It applies to steady-state DC potential between tab and leads. For AC applications, RMS voltage must remain ≤ 1414 V to maintain safety margin.