PEF 2426 H V1.1 D

Telecom Overview

The PEF 2426 H V1.1 D is a Quad ISDN High Voltage Power Controller (QIHPC) designed to supply power for up to four U-line interfaces in ISDN systems. It operates with an ISDN Line Feed Voltage range of -130 V to -30 V and a logic supply voltage of 3.0 V to 6.0 V. The device features individual current monitoring and limiting for each line, programmable via external resistors. It includes intelligent chip temperature control with thresholds at 130 °C, 170 °C, and 190 °C to prevent overload damage. Additionally, it integrates eight relay drivers with open-collector outputs capable of sinking up to 40 mA. The component is housed in a P-MQFP-44 package.

Telecom Feature Summary

• Provides power source for up to four ISDN transmission lines with individual control and monitoring
• Integrates intelligent junction temperature control to automatically switch off lines or all channels during overtemperature conditions
• Includes eight integrated relay drivers with high-current open-collector output stages and inductive voltage peak protection
• Supports programmable current limitation and overcurrent indication thresholds using external resistors

Telecom Applications

• Feeding two-wire ISDN transmission lines
• System integration with PEB 24901 (DFE-T), PEB 24911 (DFE-Q), and PEB 2491 (QUAD-U)
• 16-Line Card Applications utilizing DELPHI and QUAD-U architectures

Telecom Procurement Notes

Verify the specific suffix 'H V1.1 D' against the manufacturer's official documentation to confirm pinout compatibility and electrical characteristics. Ensure that the P-MQFP-44 package dimensions match the target PCB footprint. Confirm that the operating temperature range meets the environmental requirements of the intended application, as variations may exist between different manufacturing revisions.

Telecom Selection Notes

Select this component when designing ISDN line interface circuits requiring centralized power management for multiple U-lines. It is suitable for applications needing ETSI TS 102 080 compliance for dynamic power feeding. Consider the external resistor requirements for setting current limits and the need for external protection circuitry against lightning surges and foreign voltage contact on the line side.

Telecom Part Context

The PEF 2426 belongs to the QIHPC family from Infineon Technologies, specifically engineered for ISDN network equipment. It serves as a critical power distribution unit in telecommunication exchanges and subscriber devices. The device replaces discrete power switching solutions by integrating DMOS transistors, current sensing, and thermal protection into a single smart power technology chip.

Telecom Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing system controllers such as the PEB 2491 QUAD-U before considering alternative components.