HV9931LG-G LED Driver IC Equivalent & Substitute Parts

Part Overview

The HV9931LG-G is an AC DC offline switcher LED driver IC manufactured by Microchip Technology, designed for lighting applications with PWM dimming capability. This device features a single output with step-down (buck) and step-up (boost) topology, operating across a wide supply voltage range of 8V to 450V. The part is currently active in production with ROHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified when equivalent functional performance is required due to inventory constraints, design optimization, or application-specific requirements.

Substiute Parts

HV9931LG-G

Microchip TechnologyIn Stock: 8606HV9931LG-G Datasheet

Current PartRFQ

CPC9909N

IXYS Integrated Circuits DivisionIn Stock: 1971CPC9909N Datasheet

MFR RecommendedRFQ

CPC9909NE

IXYS Integrated Circuits DivisionIn Stock: 2168CPC9909NE Datasheet

MFR RecommendedRFQ

LM3444MM/NOPB

Texas InstrumentsIn Stock: 1364LM3444MM/NOPB Datasheet

MFR RecommendedRFQ

TPS92075DDCR/NOPB

Texas InstrumentsIn Stock: 1562TPS92075DDCR/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the HV9931LG-G is determined by the following critical parameters: AC DC offline switcher topology, single output configuration, PWM dimming capability, 8-SOIC package form factor, and operating temperature range of -40°C to 85°C. The supply voltage range (8V to 450V) and switching frequency (100kHz) define the primary functional envelope.

Identified substitute parts are grouped into two categories based on parameter alignment:

Category 1: Full Topology Match (Buck-Boost with PWM)

• CPC9909N and CPC9909NE (IXYS) maintain identical topology (step-down/step-up), PWM dimming, and 8-SOIC packaging. These parts support extended supply voltage (up to 550V) and variable frequency range (30kHz–120kHz).

Category 2: Partial Topology Match (Single Topology with Alternative Dimming)

• LM3444MM/NOPB (Texas Instruments) provides step-down (buck) only topology with analog dimming, limited to 8V–13V supply range, in 10-VSSOP package.
• TPS92075DDCR/NOPB (Texas Instruments) provides step-down/step-up topology with triac dimming, limited to 11V–18V supply range, in SOT-23-THIN package.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts maintain active product status and ROHS3 compliance, meeting regulatory requirements equivalent to the HV9931LG-G.

CPC9909N and CPC9909NE are the closest functional equivalents, offering identical AC DC offline switcher topology with buck-boost capability and PWM dimming. Both parts operate within the -40°C to 85°C temperature range and maintain 8-SOIC packaging compatibility. The CPC9909NE variant includes an exposed pad for enhanced thermal performance. These parts support extended maximum supply voltage (550V) and variable frequency operation (30kHz–120kHz), providing design flexibility for applications requiring different switching characteristics.

LM3444MM/NOPB is suitable only for applications requiring step-down (buck) topology with analog dimming control. The restricted supply voltage range (8V–13V maximum) and 10-VSSOP package form factor limit its applicability to low-voltage lighting circuits. The extended operating temperature range (-40°C to 125°C junction temperature) provides thermal margin for high-reliability applications.

TPS92075DDCR/NOPB is applicable for designs utilizing triac dimming control with buck-boost topology. The narrow supply voltage window (11V–18V) and SOT-23-THIN package restrict its use to specific low-voltage lighting applications. This part also features extended junction temperature rating (-40°C to 125°C).

Frequently Asked Questions (FAQ)

Q: Can CPC9909N or CPC9909NE directly replace HV9931LG-G in existing designs?

A: CPC9909N and CPC9909NE maintain functional equivalence in topology (buck-boost), output count (single), dimming method (PWM), and package footprint (8-SOIC). Both parts operate within the same temperature range (-40°C to 85°C). Design validation is required to confirm compatibility with the extended supply voltage capability (550V maximum) and variable frequency range (30kHz–120kHz) relative to the HV9931LG-G specification (100kHz fixed).

Q: Why are LM3444MM/NOPB and TPS92075DDCR/NOPB listed as substitutes if they have different supply voltage ranges?

A: These parts are listed as substitutes for applications where the HV9931LG-G supply voltage range is not fully utilized. LM3444MM/NOPB is applicable for designs operating within 8V–13V, and TPS92075DDCR/NOPB for designs within 11V–18V. Both maintain AC DC offline switcher classification and single-output configuration. Dimming method differences (analog and triac respectively) require circuit redesign compared to PWM control.

Q: What is the difference between CPC9909N and CPC9909NE?

A: Both parts share identical electrical specifications, topology, and frequency range. CPC9909NE includes an exposed pad (8-SOIC-EP package variant) for improved thermal dissipation compared to the standard 8-SOIC package of CPC9909N. Selection depends on thermal management requirements in the target application.

Q: Are all substitute parts available in the same packaging?

A: No. CPC9909N and CPC9909NE maintain 8-SOIC compatibility with HV9931LG-G. LM3444MM/NOPB uses 10-VSSOP packaging, and TPS92075DDCR/NOPB uses SOT-23-THIN packaging. PCB layout and footprint modifications are required for parts with different package types.

Q: Do all substitute parts meet the same compliance standards as HV9931LG-G?

A: Yes. All identified substitute parts are ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1), matching the HV9931LG-G compliance profile. All parts are classified as EAR99 for export control purposes.