PFS708EG Equivalent & Substitute Parts

Part Overview

The PFS708EG is a Power Factor Correction (PFC) controller IC manufactured by Power Integrations, operating in Continuous Conduction Mode (CCM) with a switching frequency range of 24kHz to 95kHz. This device is packaged in a 7-lead eSIP format with through-hole mounting and is classified as obsolete. Due to its obsolete status, equivalent substitute parts from the HiperPFS™ series are available to maintain design continuity and ensure supply chain availability for applications requiring PFC control functionality.

Substiute Parts

PFS708EG

Power IntegrationsIn Stock: 9164PFS708EG Datasheet

Current PartRFQ

PFS7625H

Power IntegrationsIn Stock: 2122PFS7625H Datasheet

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PFS7625H/L

Power IntegrationsIn Stock: 1127PFS7625H/L Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the PFS708EG is determined by the following critical parameters:

Operating Mode Requirement: Both the main part and substitute parts must operate in Continuous Conduction (CCM) mode to maintain equivalent PFC control functionality.

Switching Frequency Compatibility: The substitute part's switching frequency range must overlap with or encompass the original part's frequency band (24kHz ~ 95kHz) to ensure compatible circuit operation and EMI characteristics.

Supply Voltage Range: The substitute part must accept the same or broader supply voltage range to function within existing power supply designs.

Operating Temperature Range: The substitute part must maintain the same temperature operating window (-40°C ~ 125°C) for thermal compatibility.

Mounting and Package Compatibility: Through-hole mounting with exposed pad configuration is required for direct board-level substitution.

Regulatory Compliance: RoHS compliance and MSL rating must match to ensure environmental and manufacturing process compatibility.

The PFS7625H and PFS7625H/L meet these substitution criteria as active products within the HiperPFS™ family, offering extended frequency ranges and improved supply voltage tolerance while maintaining CCM operation and thermal specifications.

Parameter Comparison

Engineering Selection Recommendations

PFS7625H: This substitute part is recommended for applications requiring extended supply voltage tolerance (10.2V ~ 15V) and higher switching frequency capability (22kHz ~ 123kHz). The PFS7625H maintains full CCM operation and thermal specifications identical to the PFS708EG. As an active product, it offers long-term supply chain availability and ongoing manufacturer support. The 16-lead eSIP-16D package provides additional functionality compared to the 7-lead original package, requiring PCB layout modifications. RoHS compliance and MSL rating are equivalent to the main part.

PFS7625H/L: This variant is listed as an active product with identical RoHS compliance and MSL rating. Detailed electrical specifications are not provided in the available data; therefore, compatibility assessment requires consultation of the complete datasheet before selection.

Both substitute parts are manufactured by Power Integrations and belong to the HiperPFS™ family, ensuring design continuity within the same product ecosystem. Selection between PFS7625H and PFS7625H/L should be based on specific application requirements and available technical documentation.

Frequently Asked Questions (FAQ)

Q: Why is the PFS708EG classified as obsolete? A: The PFS708EG has reached end-of-life status within Power Integrations' product portfolio. Substitute parts from the active HiperPFS™ family are available to support ongoing applications.

Q: Can the PFS7625H directly replace the PFS708EG without PCB modifications? A: No. The PFS7625H uses a 16-lead eSIP-16D package compared to the 7-lead eSIP-7G package of the PFS708EG. PCB layout and pinout modifications are required for substitution.

Q: What is the key functional difference between PFS708EG and PFS7625H? A: Both devices operate in Continuous Conduction Mode and maintain identical temperature ranges. The PFS7625H offers an extended supply voltage range (10.2V ~ 15V versus 10V ~ 12V) and higher maximum switching frequency (123kHz versus 95kHz).

Q: Are the substitute parts RoHS compliant? A: Yes. Both PFS7625H and PFS7625H/L are RoHS Compliant with MSL rating of 1 (Unlimited), matching the compliance status of the PFS708EG.

Q: What inventory status should be considered for production planning? A: The PFS708EG has 9100 pieces in stock as an obsolete part. The PFS7625H has 2048 pieces available as an active product. The PFS7625H/L has 1082 pieces in stock. For long-term supply security, active products (PFS7625H and PFS7625H/L) are preferred.

Q: Do the substitute parts operate within the same frequency range as the original? A: The PFS708EG operates at 24kHz ~ 95kHz. The PFS7625H operates at 22kHz ~ 123kHz, which encompasses the original frequency range with extended upper capability. Detailed specifications for PFS7625H/L are not provided.

Q: What certifications apply to all three parts? A: All three parts are RoHS Compliant, REACH Unaffected, classified under ECCN EAR99, and HTSUS 8542.39.0001. MSL rating is 1 (Unlimited) for all parts.