TC1427EPAG Equivalent & Substitute Parts

Part Overview

The TC1427EPAG is a low-side gate driver IC manufactured by Microchip Technology, designed for driving N-Channel and P-Channel MOSFETs in power management applications. This device operates as a non-inverting driver with independent dual-channel configuration and is housed in an 8-PDIP package.

The TC1427EPAG is classified as obsolete. Identifying suitable substitute components is necessary to maintain design continuity and ensure availability for new production runs or system updates.

Substiute Parts

TC1427EPAG

Microchip TechnologyIn Stock: 793TC1427EPAG Datasheet

Current PartRFQ

IR4427PBF

International RectifierIn Stock: 3317IR4427PBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TC1427EPAG is determined by the following critical parameters:

• Driven Configuration: Must be Low-Side
• Channel Type: Must be Independent
• Number of Drivers: Must be 2
• Package / Case: Must be 8-DIP (0.300", 7.62mm)
• Input Type: Must be Non-Inverting
• Gate Type Compatibility: Must support N-Channel MOSFET operation at minimum

The IR4427PBF qualifies as a substitute based on matching driven configuration, channel type, number of drivers, package format, and input type. The IR4427PBF supports both IGBT and N-Channel MOSFET gate types, providing broader application compatibility while maintaining the same physical footprint and functional interface.

Parameter Comparison

Engineering Selection Recommendations

The IR4427PBF is the manufacturer-recommended substitute for the obsolete TC1427EPAG. Both devices share identical package geometry (8-DIP), driven configuration (low-side), channel independence, and non-inverting input logic, enabling direct replacement in existing PCB layouts without modification.

The IR4427PBF is classified as Active product status, ensuring continued availability and supply chain stability. Both components maintain ECCN EAR99 classification and HTSUS code 8542.39.0001 alignment.

The IR4427PBF provides enhanced electrical performance characteristics, including higher peak output current (2.3A source, 3.3A sink versus 1.2A symmetric), faster switching times (15ns/10ns rise/fall versus 35ns/25ns), and extended operating temperature range (-40°C to 150°C junction temperature versus -40°C to 85°C ambient). These improvements are backward-compatible with TC1427EPAG applications operating within the original supply voltage range of 4.5V to 16V.

Frequently Asked Questions (FAQ)

Q: Can the IR4427PBF directly replace the TC1427EPAG without PCB modifications?

A: Yes. Both devices use identical 8-DIP package geometry with matching pin assignments for low-side gate driver functionality. No PCB layout changes are required.

Q: What is the primary reason for substitution?

A: The TC1427EPAG is obsolete. The IR4427PBF is an active product with equivalent functional specifications and improved electrical performance.

Q: Are there differences in logic voltage thresholds?

A: The VIL threshold is identical at 0.8V. The VIH threshold differs slightly: TC1427EPAG specifies 3V while IR4427PBF specifies 2.7V. This difference does not affect compatibility in standard logic-level applications.

Q: Does the IR4427PBF support the same gate types?

A: The IR4427PBF supports IGBT and N-Channel MOSFET operation. The TC1427EPAG supports N-Channel and P-Channel MOSFET operation. For N-Channel MOSFET applications, both are compatible. For P-Channel MOSFET applications, design verification is required.

Q: What is the impact of higher output current ratings in the IR4427PBF?

A: The IR4427PBF provides 2.3A source and 3.3A sink current versus 1.2A symmetric output in the TC1427EPAG. This enhancement allows driving larger gate capacitances and faster switching transitions without exceeding device ratings.

Q: Is the supply voltage range compatible?

A: The TC1427EPAG operates from 4.5V to 16V. The IR4427PBF operates from 6V to 20V. Applications using supply voltages between 6V and 16V are fully compatible. Applications below 6V require design review.

Q: What is the temperature operating range difference?

A: The TC1427EPAG is rated to 85°C ambient temperature. The IR4427PBF is rated to 150°C junction temperature, providing extended thermal margin for high-temperature environments.