IW3662-01-QFN5 LED Driver IC Equivalent & Substitute Parts

Part Overview

The IW3662-01-QFN5 is an AC DC offline switcher LED driver IC manufactured by Renesas Electronics Corporation. This single-output power management IC integrates PWM dimming control with step-down (buck) and step-up (boost) topology capabilities, designed for LED lighting applications. The device operates across a 10V to 24V supply range and is housed in a 16-QFN (4x4) surface mount package with exposed pad. With active product status and 33,400 units in stock, substitute parts may be required for design flexibility, supply chain optimization, or specific application requirements where alternative topologies or electrical characteristics provide functional equivalence.

Substiute Parts

IW3662-01-QFN5

Renesas Electronics CorporationIn Stock: 33431IW3662-01-QFN5 Datasheet

Current PartRFQ

AL9902S16-13

Diodes IncorporatedIn Stock: 1186AL9902S16-13 Datasheet

MFR RecommendedRFQ

HV9801ANG-G

Microchip TechnologyIn Stock: 1909HV9801ANG-G Datasheet

MFR RecommendedRFQ

LM3497MX/NOPB

Texas InstrumentsIn Stock: 98909LM3497MX/NOPB Datasheet

MFR RecommendedRFQ

MP4653GY

Monolithic Power Systems Inc.In Stock: 953MP4653GY Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the IW3662-01-QFN5 is determined by the following critical parameters:

• Type: AC DC Offline Switcher topology classification
• Number of Outputs: Single output requirement
• Dimming Capability: PWM dimming support
• Supply Voltage Range: Compatibility with 10V to 24V input or overlapping range
• Package Category: Surface mount configuration
• Product Status: Active status for ongoing availability

The substitute parts listed below maintain functional equivalence through AC DC offline switcher topology and single-output LED driver architecture. However, variations exist in topology subclassification (buck vs. buck-boost), supply voltage ranges, dimming methods (PWM, analog, or triac), package types, and thermal specifications. These variations require engineering evaluation based on specific circuit requirements and board layout constraints.

Parameter Comparison

Engineering Selection Recommendations

AL9902S16-13 (Diodes Incorporated)

This substitute maintains buck-boost topology with PWM and analog dimming support. Supply voltage range (20V–500V) exceeds the IW3662-01-QFN5 minimum but accommodates higher input scenarios. The 400mA output current specification and 300kHz frequency provide defined performance parameters. ROHS3 compliance and active product status ensure regulatory alignment. Package transition from 16-QFN to 16-SOIC requires PCB layout modification. MSL rating of 3 (168 hours) requires controlled moisture handling during assembly.

HV9801ANG-G (Microchip Technology)

This substitute operates as a buck-only topology with PWM dimming, suitable for step-down applications. Supply voltage range (15V–450V) extends beyond the original specification. The 7.5V output voltage is fixed, limiting flexibility for variable output designs. MSL rating of 1 (Unlimited) and ROHS3 compliance support standard manufacturing processes. Package transition to 16-SOIC requires board redesign. Operating temperature range (-40°C to 125°C) is lower than the IW3662-01-QFN5 (150°C junction temperature).

LM3497MX/NOPB (Texas Instruments)

This substitute is a buck-only topology with triac dimming, designed for AC line dimmer compatibility. Supply voltage range (8V–12V) is narrower than the original part, limiting application scope. The 14-SOIC package differs from the 16-QFN footprint. Triac dimming differs from PWM dimming, requiring circuit redesign for dimming control. ROHS3 compliance and MSL rating of 1 support standard assembly. This part is suitable only for applications requiring triac-based dimming control.

MP4653GY (Monolithic Power Systems Inc.)

This substitute employs half-bridge topology with analog and PWM dimming support. Supply voltage range (9V–30V) overlaps the original specification with extended upper limit. The 20-SOIC package requires significant PCB layout changes. Half-bridge topology differs from buck-boost, affecting circuit design and component selection. ROHS3 compliance and active product status ensure regulatory alignment. MSL rating of 3 (168 hours) requires moisture control during assembly.

Frequently Asked Questions (FAQ)

Q: Can the AL9902S16-13 directly replace the IW3662-01-QFN5 without circuit modification?

A: No. While both are AC DC offline switcher LED drivers with single outputs and PWM dimming, the AL9902S16-13 requires PCB layout changes due to package transition from 16-QFN to 16-SOIC. Additionally, the supply voltage range (20V–500V) differs from the original (10V–24V), requiring verification that the application input voltage falls within both ranges. The 400mA output current specification must be evaluated against circuit requirements.

Q: What is the primary difference between the HV9801ANG-G and the IW3662-01-QFN5?

A: The HV9801ANG-G is a buck-only topology, whereas the IW3662-01-QFN5 supports both buck and boost configurations. The HV9801ANG-G has a fixed 7.5V output voltage, limiting its use to applications requiring that specific output level. Supply voltage range (15V–450V) also differs significantly. These differences restrict the HV9801ANG-G to specific application scenarios.

Q: Why does the LM3497MX/NOPB use triac dimming instead of PWM?

A: The LM3497MX/NOPB is designed for AC line dimmer compatibility, where triac-based phase-cut dimming is the standard control method. This differs fundamentally from PWM dimming used in the IW3662-01-QFN5. Selection of this part requires that the application circuit supports triac dimming control.

Q: How do package differences affect substitution?

A: Package differences require PCB layout redesign. The IW3662-01-QFN5 uses 16-QFN (4x4), while substitutes use 16-SOIC, 14-SOIC, or 20-SOIC packages. Pin counts, pitch, and footprint dimensions differ, necessitating schematic and layout verification. Component placement, trace routing, and thermal management may require adjustment.

Q: What does MSL rating mean for component substitution?

A: MSL (Moisture Sensitivity Level) indicates how long a component can be exposed to moisture before assembly. The IW3662-01-QFN5 has MSL 1 (unlimited exposure), while AL9902S16-13 and MP4653GY have MSL 3 (168-hour limit). Parts with higher MSL ratings require controlled storage and handling during manufacturing to prevent moisture absorption and potential failure.

Q: Are all substitute parts ROHS3 compliant?

A: All listed substitute parts are ROHS3 compliant. The IW3662-01-QFN5 RoHS status is not specified in the provided data. Verification of RoHS compliance for the original part is recommended if regulatory requirements mandate it.

Q: Which substitute part has the highest operating temperature rating?

A: The IW3662-01-QFN5 has the highest junction temperature rating at 150°C (TJ). All substitute parts are rated to 105°C–125°C (TA or TJ). Applications requiring operation above 125°C may not be compatible with the listed substitutes.