TFS7703H Equivalent & Substitute Parts

Part Overview

The TFS7703H is an active, production-status Power Management IC (PMIC) manufactured by Power Integrations, belonging to the HiperTFS™-2 series. This device functions as a multi-output DC-DC controller supporting flyback and forward converter topologies with step-up and step-down capability. The TFS7703H is designed for applications requiring isolated or positive output regulation with transistor driver output configuration. Current inventory availability is 1313 pieces in new original condition.

Substitute parts are identified when design requirements, supply constraints, or manufacturing transitions necessitate alternative component selection while maintaining functional and electrical compatibility within the specified parameter envelope.

Substiute Parts

TFS7703H

Power IntegrationsIn Stock: 1341TFS7703H Datasheet

Current PartRFQ

TFS7708H

Power IntegrationsIn Stock: 1222TFS7708H Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TFS7703H are identified based on strict electrical and mechanical parameter equivalence within the HiperTFS™-2 product family. The substitution criteria are defined by the following parameters:

Critical Equivalence Parameters:

• Manufacturer: Power Integrations
• Series: HiperTFS™-2
• Topology: Flyback, Forward Converter
• Function: Step-Up, Step-Down
• Output Configuration: Positive, Isolation Capable
• Number of Outputs: 2
• Output Type: Transistor Driver
• Voltage - Supply (Vcc/Vdd): Up to 11.5V
• Frequency - Switching: 66kHz, 132kHz
• Duty Cycle (Max): 63%
• Control Features: Enable, Reset
• Operating Temperature Range: -40°C ~ 150°C (TJ)
• Package / Case: 16-SSIP, 12 Leads, Exposed Pad, Formed Leads
• Supplier Device Package: eSIP-16F
• Mounting Type: Through Hole
• RoHS Status: RoHS Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)
• REACH Status: REACH Unaffected

Parts meeting all specified parameters are classified as parametric equivalents and direct substitutes.

Parameter Comparison

Engineering Selection Recommendations

TFS7703H (Primary Part)

• Active product status with established supply chain
• 1313 pieces available in new original condition
• Full RoHS compliance and REACH unaffected status
• Suitable for new designs and production applications

TFS7708H (Substitute Part)

• Active product status with confirmed availability
• 1176 pieces available in new original condition
• Identical electrical and mechanical specifications to TFS7703H
• Full RoHS compliance and REACH unaffected status
• Direct functional replacement within the HiperTFS™-2 series

Both parts are suitable for applications requiring flyback or forward converter topologies with dual-output, isolated or positive output regulation. Selection between TFS7703H and TFS7708H is determined by supply availability, procurement lead time, or design phase requirements. Both parts meet identical compliance and certification requirements.

Frequently Asked Questions (FAQ)

Q: Can TFS7708H be used as a direct replacement for TFS7703H in existing designs?

A: Yes. The TFS7708H meets all electrical and mechanical parameters specified for the TFS7703H, including topology, output configuration, voltage supply range, switching frequency, duty cycle, control features, operating temperature range, and package specifications. Both parts are members of the HiperTFS™-2 series with identical eSIP-16F packaging and through-hole mounting configuration.

Q: Are there any differences in RoHS or environmental compliance between these parts?

A: No. Both TFS7703H and TFS7708H carry identical RoHS Compliant status, REACH Unaffected designation, and Moisture Sensitivity Level 1 (Unlimited) rating. Both parts meet the same regulatory and environmental standards.

Q: What is the difference between TFS7703H and TFS7708H?

A: The provided specifications indicate both parts are parametrically equivalent across all electrical and mechanical parameters. Differences, if any, exist only in the base product number designation (TFS7703 versus TFS7708) and current inventory levels (1313 versus 1176 pieces).

Q: Can these parts be used interchangeably in PCB designs?

A: Yes. Both parts use identical 16-SSIP, 12-lead eSIP-16F packaging with exposed pad and formed leads. Through-hole mounting configuration is identical. No PCB layout modifications are required for substitution.

Q: What applications are these parts suitable for?

A: Both TFS7703H and TFS7708H are designed for flyback and forward converter topologies supporting step-up and step-down DC-DC conversion with positive or isolated output regulation. Applications include multi-output power supplies, isolated power delivery systems, and regulated DC-DC conversion circuits operating within the -40°C to 150°C junction temperature range and up to 11.5V supply voltage.

Q: Are both parts currently in production?

A: Yes. Both TFS7703H and TFS7708H carry Active product status, indicating current production and ongoing support from Power Integrations.