Infineon Technologies PEF 2426 H V1.1 GD

Overview

PEF 2426 H V1.1 GD from Infineon Technologies is a Quad ISDN High Voltage Power Controller (QIHPC) designed for line feed power management in ISDN U-interface systems. It delivers up to 130 V DC line feed voltage, provides independent current monitoring and limiting per line (four channels), integrates eight open-collector relay drivers, and features intelligent thermal shutdown with dual-threshold overtemperature protection. Used in multi-line ISDN terminal adapters and central office line cards.

For engineers reviewing the PEF 2426 H V1.1 GD datasheet, PEF 2426 H V1.1 GD pinout, PEF 2426 H V1.1 GD application, or PEF 2426 H V1.1 GD equivalent, key selection criteria include programmable per-line overcurrent delay (via CS1–CS4), external resistor–set current limit (RF), ETSI TS 102 080 compliance, thermal foldback behavior, and relay driver sink capability (500 mA per RDout).

Technical Context

The PEF 2426 H V1.1 GD implements four independent high-voltage DMOS line feed controllers with dedicated current sensing (via RS1–RS4), programmable overcurrent indication delay (t_OC, set by CS1–CS4), and dual-level current response: first threshold triggers NACK status, second enforces hard current limiting. Each channel supports up to 130 V line feed and monitors load current with ±5% accuracy at 25 °C.

It integrates eight high-current open-collector relay drivers (RDout1–RDout8), each rated for 500 mA sink current and 170 V breakdown, controlled via RDin1–RDin8 logic inputs. Thermal protection includes on-die temperature detection with automatic per-line shutdown below full overtemperature and global shutdown above critical junction temperature (150 °C).

Key Specifications

Pinout & Package

PEF 2426 H V1.1 GD is housed in a 44-pin Plastic Metric Quad Flat Package (P-MQFP-44) with 0.8 mm lead pitch and exposed thermal pad. The package supports high-power dissipation in telecom line card applications and is qualified per JEDEC MS-026.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad ISDN line feed controller applications.

Compared with PEB 2426 H V1.1 GD and PEF 2426 V2.0, the PEF 2426 H V1.1 GD offers proven field reliability and full compatibility with existing QUAD-U and DELPHI platform schematics, while V2.0 trades minor recalibration effort for enhanced thermal stability and current accuracy.

Availability

PEF 2426 H V1.1 GD is available at Aetrix Electronics and suitable for ISDN terminal adapters, multi-line central office cards, and industrial ISDN modem modules requiring stable component supply, long-lifecycle support, and ETSI-compliant line feed performance.

Supply support for PEF 2426 H V1.1 GD 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

Infineon Technologies AG is a German semiconductor manufacturer specializing in power management, automotive, and industrial control ICs, with global R&D and manufacturing infrastructure.

This device belongs to Infineon's Smart Power Technology (SPT) product line, engineered specifically for high-voltage telecom power delivery - combining DMOS, bipolar, and CMOS on one die to meet stringent ETSI and ITU-T line interface standards.

FAQ

What is the maximum allowable voltage on D1–D4 pins?

The D1–D4 pins are rated for continuous DC voltage up to 130 V and pulse withstand up to 170 V, as defined by the 170 V Smart Power Technology process. Operation beyond 130 V DC violates ETSI TS 102 080 and risks premature DMOS degradation. Absolute maximum rating is 170 V for ≤10 µs pulses only.

Can PF1–PF4 be driven directly from a 3.3 V microcontroller?

Yes - PF1–PF4 accept TTL/CMOS logic levels with V_IL ≤ 0.8 V and V_IH ≥ 2.0 V. A 3.3 V MCU output meets these thresholds, but ensure the MCU's drive strength exceeds 10 µA sink/source to guarantee clean transitions and avoid floating input states.

How does the thermal protection interact with individual line current limiting?

Thermal protection operates hierarchically: first, per-line current limiting activates at programmed threshold; if junction temperature still rises, per-line thermal foldback reduces current further; finally, at 150 °C, all four lines and relay drivers shut down globally. This staged response maintains partial functionality as long as possible.

Is external current-sense resistor RS required for basic operation?

Yes - RS1–RS4 are mandatory for both current limiting and overcurrent indication. Without them, the internal current sense path is incomplete, causing uncontrolled line feed current and disabling NACK signaling. Typical values range from 0.1 Ω to 1 Ω depending on target limit (e.g., 100 mA → 0.5 Ω).