HF01B04DS-LF-Z Equivalent & Substitute Parts

Part Overview

The HF01B04DS-LF-Z is an offline switch flyback converter IC manufactured by Monolithic Power Systems Inc., designed for isolated power management applications. This device operates with a flyback topology at switching frequencies up to 150kHz and delivers up to 23W of power. The part is classified as obsolete, necessitating identification of active alternative components that maintain functional and electrical compatibility for new designs or production continuity.

Substiute Parts

HF01B04DS-LF-Z

Monolithic Power Systems Inc.In Stock: 7780HF01B04DS-LF-Z Datasheet

Current PartRFQ

HF500GS-15

Monolithic Power Systems Inc.In Stock: 1100HF500GS-15 Datasheet

MFR RecommendedRFQ

HF500GS-7-Z

Monolithic Power Systems Inc.In Stock: 1795HF500GS-7-Z Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the HF01B04DS-LF-Z is based on the following critical parameters that must align across alternatives:

Mandatory Compatibility Parameters:

• Topology: Flyback converter architecture
• Output Isolation: Isolated configuration
• Voltage - Breakdown: 700V rating
• Package / Case: 8-SOIC (0.154", 3.90mm Width), 7 Leads
• Mounting Type: Surface Mount
• Manufacturer: Monolithic Power Systems Inc.

Functional Parameters:

• Internal Switch(s): Yes (integrated power switch)
• Fault Protection: Over Load, Over Temperature, Over Voltage protection capability

The substitute parts HF500GS-15 and HF500GS-7-Z meet these core compatibility criteria. Both are active products from the same manufacturer, share identical package specifications, and maintain the same breakdown voltage and isolation characteristics. These parts are suitable for applications requiring offline flyback conversion with the same physical and electrical interface constraints.

Parameter Comparison

Engineering Selection Recommendations

Both HF500GS-15 and HF500GS-7-Z are active products suitable for replacing the obsolete HF01B04DS-LF-Z in new designs. Selection between these alternatives depends on application power requirements and switching frequency specifications.

HF500GS-7-Z is the primary recommended substitute. It maintains active product status, provides ROHS3 compliance, and operates at 65kHz switching frequency with 1.5W power rating. This part is available in Tape & Reel packaging with MSL-3 moisture sensitivity rating (168 Hours).

HF500GS-15 is an alternative substitute with active product status and ROHS3 compliance. It operates at 25kHz switching frequency with 1.5W power rating and features MSL-6 moisture sensitivity rating (Time on Label).

Both substitutes provide extended operating temperature ranges (-40°C ~ 125°C junction temperature) compared to the main part, enhanced fault protection including short circuit detection, and soft start control features. The 8-SOIC package footprint remains identical, enabling direct PCB layout compatibility.

Frequently Asked Questions (FAQ)

Q: Can HF500GS-15 or HF500GS-7-Z directly replace HF01B04DS-LF-Z in existing designs?

A: Both parts share identical package specifications (8-SOIC, 7 Leads) and electrical interface characteristics (700V breakdown, isolated topology, flyback architecture). PCB footprint compatibility is maintained. However, the power rating difference (23W vs. 1.5W) and supply voltage range variation (8V~20V vs. 12.5V~24V) require circuit design verification for your specific application.

Q: What are the key differences between HF500GS-15 and HF500GS-7-Z?

A: The primary difference is switching frequency: HF500GS-15 operates at 25kHz while HF500GS-7-Z operates at 65kHz. Both deliver 1.5W power and share identical package, topology, and protection features. HF500GS-7-Z includes Tape & Reel packaging option with MSL-3 rating; HF500GS-15 features MSL-6 rating.

Q: Are the substitute parts RoHS compliant?

A: Yes, both HF500GS-15 and HF500GS-7-Z are ROHS3 compliant, matching the compliance status of the original HF01B04DS-LF-Z.

Q: What is the operating temperature range for substitute parts?

A: Both HF500GS-15 and HF500GS-7-Z operate across -40°C to 125°C junction temperature (TJ), providing a wider temperature range than the original part (-40°C to 85°C ambient temperature).

Q: Do the substitute parts include additional protection features?

A: Yes, both HF500GS-15 and HF500GS-7-Z include short circuit protection in addition to the over load, over temperature, and over voltage protection present in the original part. Both also feature soft start control.