IRS27952SPBF Equivalent & Substitute Parts

Part Overview

The IRS27952SPBF is a Buck/Half-Bridge Regulator Controller IC manufactured by Infineon Technologies, designed for step-down and step-up/step-down DC-DC conversion applications. This device operates as a transistor driver with positive, isolation-capable output configuration and supports synchronous rectification. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

IRS27952SPBF

Infineon TechnologiesIn Stock: 1394IRS27952SPBF Datasheet

Current PartRFQ

ICE1HS01G1XUMA1

Infineon TechnologiesIn Stock: 1076ICE1HS01G1XUMA1 Datasheet

MFR RecommendedRFQ

SG1845Y-DESC

Microchip TechnologyIn Stock: 882SG1845Y-DESC Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the IRS27952SPBF is determined by alignment across the following critical parameters:

Primary Substitution Criteria:

• Topology classification (Buck, Half-Bridge, or Flyback)
• Output type and configuration (Transistor Driver, Positive/Isolated output)
• Supply voltage range compatibility (12V ~ 18V nominal operation)
• Switching frequency capability (up to 500kHz)
• Package form factor (8-pin surface mount or compatible pinout)
• Duty cycle support (50% maximum)
• Operating temperature range (-40°C to 150°C preferred)

Identified Substitute Categories:

1. ICE1HS01G1XUMA1 (Infineon Technologies) – Direct topology match with Half-Bridge configuration, isolated output, compatible supply voltage range (10.2V ~ 18V), and surface mount 8-SOIC package. Switching frequency range (50kHz ~ 609kHz) encompasses the IRS27952SPBF operating window.

2. SG1845Y-DESC (Microchip Technology) – Alternative topology (Flyback) with step-up/step-down function, positive isolated output, and compatible 8-pin package. Broader supply voltage range (7.6V ~ 30V) and extended switching frequency capability (1Hz ~ 500kHz) provide operational flexibility. Through-hole mounting differs from original surface mount configuration.

Parameter Comparison

Engineering Selection Recommendations

ICE1HS01G1XUMA1 Selection Criteria:

This substitute is recommended for applications requiring direct topology preservation and surface mount assembly continuity. The Half-Bridge configuration matches the original IRS27952SPBF topology, and the 8-SOIC package maintains PCB layout compatibility. Supply voltage range (10.2V ~ 18V) overlaps the original specification window. The part is currently in active production status with ROHS3 compliance certification. Operating temperature range (-25°C ~ 125°C) is narrower than the original; applications requiring extended temperature operation below -25°C or above 125°C require thermal analysis.

SG1845Y-DESC Selection Criteria:

This substitute addresses applications where topology flexibility is acceptable and extended supply voltage range (7.6V ~ 30V) provides system design advantages. The Flyback topology offers alternative circuit implementation with comparable step-up/step-down functionality. Through-hole mounting requires PCB redesign and assembly process modification. The part is in active production with ROHS3 compliance and MIL-STD-883B qualification. Operating temperature range (-55°C ~ 125°C) extends low-temperature capability. Synchronous rectifier support is retained.

Frequently Asked Questions (FAQ)

Q: Can ICE1HS01G1XUMA1 be used as a direct pin-for-pin replacement for IRS27952SPBF?

A: Both devices use 8-SOIC packaging with identical physical dimensions (0.154", 3.90mm width). Pin compatibility requires functional schematic review; identical package form does not guarantee identical pinout. Consult device datasheets for pin assignment verification before implementation.

Q: What is the primary difference between Half-Bridge and Flyback topologies in these substitutes?

A: The IRS27952SPBF and ICE1HS01G1XUMA1 both employ Half-Bridge topology, which uses two switching elements in series. The SG1845Y-DESC uses Flyback topology, which employs a transformer-based energy storage mechanism. Topology selection affects circuit design, component count, and efficiency characteristics. Application requirements determine topology suitability.

Q: Does the narrower operating temperature range of ICE1HS01G1XUMA1 (-25°C ~ 125°C) limit its use?

A: The ICE1HS01G1XUMA1 operating range is narrower than the IRS27952SPBF (-40°C ~ 150°C). Applications operating below -25°C or above 125°C require thermal management analysis or selection of SG1845Y-DESC, which supports -55°C ~ 125°C operation.

Q: Why does SG1845Y-DESC use through-hole mounting instead of surface mount?

A: The SG1845Y-DESC is packaged in 8-CDIP (0.300", 7.62mm), a through-hole format. The IRS27952SPBF and ICE1HS01G1XUMA1 use 8-SOIC surface mount packages. Through-hole mounting requires PCB redesign and different assembly processes. Surface mount assembly is preferred for modern manufacturing; through-hole selection should be evaluated against production capability and cost considerations.

Q: Are all three parts ROHS3 compliant?

A: ICE1HS01G1XUMA1 and SG1845Y-DESC are explicitly ROHS3 compliant. The IRS27952SPBF RoHS status is not specified in the provided data. Regulatory compliance verification is required for applications subject to ROHS3 requirements.

Q: What is the significance of the 50% duty cycle specification?

A: Duty cycle defines the maximum on-time ratio of the switching element. The 50% specification indicates symmetric switching capability, typical for Half-Bridge topologies. The SG1845Y-DESC supports 48% maximum duty cycle, a minor deviation that does not affect practical Half-Bridge or Flyback operation.