TFS7704H Equivalent & Substitute Parts

Part Overview

The TFS7704H is an active, production-status DC-DC controller IC manufactured by Power Integrations within the HiperTFS™-2 series. This device functions as a multi-topology regulator controller supporting flyback and forward converter topologies with step-up and step-down capability. The TFS7704H is designed for applications requiring isolated or positive output configurations with dual-output capability. Current inventory status shows 1900 pieces in stock as new original components.

Substitute parts are identified when equivalent electrical performance, mechanical compatibility, and functional characteristics align with the original specification, enabling direct replacement in circuit designs without functional degradation.

Substiute Parts

TFS7704H

Power IntegrationsIn Stock: 1992TFS7704H Datasheet

Current PartRFQ

TFS7708H

Power IntegrationsIn Stock: 1222TFS7708H Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TFS7704H are identified based on strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

• Identical topology support (Flyback, Forward Converter)
• Matching function capability (Step-Up, Step-Down)
• Identical output configuration (Positive, Isolation Capable)
• Equivalent number of outputs (2)
• Matching supply voltage range (Up to 11.5V)
• Identical switching frequency options (66kHz, 132kHz)
• Matching duty cycle maximum (63%)
• Identical control features (Enable, Reset)

Mechanical & Package Equivalence Criteria:

• Identical package type (16-SSIP, 12 Leads, Exposed Pad, Formed Leads)
• Matching supplier device package designation (eSIP-16F)
• Identical mounting type (Through Hole)
• Compatible operating temperature range (-40°C ~ 150°C TJ)

Compliance & Regulatory Equivalence:

• Matching RoHS compliance status
• Identical MSL rating (1 - Unlimited)
• Matching REACH status
• Identical ECCN and HTSUS classifications

The TFS7708H meets all substitution criteria and is classified as a parametric equivalent.

Parameter Comparison

Engineering Selection Recommendations

Both the TFS7704H and TFS7708H are active production components within the Power Integrations HiperTFS™-2 series. Selection between these parts is based on the following engineering factors:

Availability Consideration: The TFS7704H maintains higher inventory levels at 1900 pieces compared to TFS7708H at 1176 pieces, supporting supply chain continuity for high-volume applications.

Regulatory & Compliance Alignment: Both components carry identical RoHS compliance certification, REACH unaffected status, and MSL-1 moisture sensitivity rating, ensuring equivalent environmental and regulatory qualification across all markets and applications.

Functional Equivalence: Complete parameter alignment across electrical specifications, control features, and thermal operating range ensures direct functional substitution without circuit redesign or performance modification.

Package & Mechanical Compatibility: Identical eSIP-16F package designation, through-hole mounting configuration, and physical lead formation enable direct PCB layout compatibility and assembly process alignment.

Component selection should prioritize inventory availability and supply chain lead time requirements while maintaining full functional and regulatory equivalence.

Frequently Asked Questions (FAQ)

Q: Can TFS7708H replace TFS7704H in existing circuit designs?

A: Yes. The TFS7708H is a parametric equivalent with identical electrical specifications, control features, supply voltage range, switching frequency options, duty cycle rating, and output configuration. The components share the same eSIP-16F package, through-hole mounting type, and operating temperature range. Direct substitution is supported without circuit modification.

Q: Are there differences in switching frequency capability between TFS7704H and TFS7708H?

A: No. Both components support identical switching frequency options of 66kHz and 132kHz. Frequency selection is determined by circuit design and application requirements, not by component selection between these two parts.

Q: What is the significance of the eSIP-16F package designation?

A: The eSIP-16F package is a 16-pin enhanced Single In-line Package with 12 functional leads and an exposed pad for thermal management. Both TFS7704H and TFS7708H use this identical package, ensuring mechanical and thermal compatibility in PCB layouts and assembly processes.

Q: Do both parts support the same output topologies?

A: Yes. Both TFS7704H and TFS7708H support flyback and forward converter topologies with step-up and step-down functionality. Output configuration is identical: positive with isolation capability, supporting dual-output applications.

Q: What control features are available on both components?

A: Both parts include Enable and Reset control features. No serial interfaces are present on either component. Control functionality is identical between TFS7704H and TFS7708H.

Q: Are there any differences in operating temperature range?

A: No. Both components operate across the identical temperature range of -40°C to 150°C junction temperature (TJ), supporting equivalent thermal performance across industrial and extended-temperature applications.

Q: What is the maximum duty cycle for both components?

A: Both TFS7704H and TFS7708H support a maximum duty cycle of 63%, enabling equivalent pulse-width modulation control and power conversion efficiency characteristics.

Q: Are both components RoHS compliant?

A: Yes. Both TFS7704H and TFS7708H carry RoHS compliance certification and are REACH unaffected, meeting identical environmental and regulatory requirements across all markets.

Q: What is the supply voltage range for these components?

A: Both components support supply voltage (Vcc/Vdd) up to 11.5V, enabling equivalent operation in low-voltage power management applications.

Q: Is there a difference in moisture sensitivity between the two parts?

A: No. Both TFS7704H and TFS7708H carry MSL-1 (Unlimited) moisture sensitivity rating, indicating identical handling and storage requirements with no moisture sensitivity constraints.