AS3685A LED Driver IC Equivalent & Substitute Parts

Part Overview

The AS3685A is a LED driver integrated circuit manufactured by ams-OSRAM USA INC., classified as a Power Management (PMIC) device. This IC functions as a 1-output DC-DC regulator utilizing switched capacitor (charge pump) topology, delivering 1A flash current output. The device is designed for camera flash applications and operates across a 3V to 5.5V supply voltage range.

The AS3685A carries an obsolete product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term product availability for applications currently utilizing this component.

Substiute Parts

AS3685A

ams-OSRAM USA INC.In Stock: 12369AS3685A Datasheet

Current PartRFQ

AS3685A-ZWLT-2Y80

ams-OSRAM USA INC.In Stock: 2491AS3685A-ZWLT-2Y80 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AS3685A is determined by strict parametric matching across the following critical criteria:

Electrical Parameters (Must Match):

• DC-DC regulator topology: Switched Capacitor (Charge Pump)
• Supply voltage range: 3V minimum to 5.5V maximum
• Output current capability: 1A (Flash) per channel
• Operating frequency: 1MHz
• Number of outputs: 1 channel
• Operating temperature range: -30°C to 85°C

Mechanical Parameters (Must Match):

• Package type: 10-VFDFN Exposed Pad
• Supplier device package: 10-DFN (3x3)
• Mounting type: Surface Mount

Environmental & Compliance Parameters:

• Moisture Sensitivity Level: 3 (168 Hours)
• Application category: Camera Flash

Parts meeting all these parameters are classified as parametric equivalents and direct substitutes. No deviations from specified parameters are permitted for substitution classification.

Parameter Comparison

Engineering Selection Recommendations

AS3685A-ZWLT-2Y80 as Primary Substitute:

The AS3685A-ZWLT-2Y80 is a direct parametric equivalent to the obsolete AS3685A. All electrical, mechanical, and thermal specifications are identical. The substitute part carries an active product status, ensuring ongoing availability and supply chain support.

The AS3685A-ZWLT-2Y80 is RoHS Compliant, providing enhanced environmental compliance compared to the main part specification. Both parts maintain identical REACH and ECCN classifications (REACH Unaffected, EAR99), ensuring regulatory consistency.

Current inventory for the substitute part is 2,404 units, supporting immediate procurement requirements. The identical 10-DFN (3x3) package and MSL rating of 3 (168 Hours) ensure direct PCB compatibility without layout or assembly process modifications.

Frequently Asked Questions (FAQ)

Q: Can AS3685A-ZWLT-2Y80 be used as a direct replacement for AS3685A in existing designs?

A: Yes. The AS3685A-ZWLT-2Y80 meets all parametric requirements for direct substitution. Electrical specifications, package dimensions, thermal characteristics, and operating ranges are identical. No circuit modifications or PCB redesign is required.

Q: What is the significance of the product status difference (Obsolete vs. Active)?

A: The AS3685A is classified as obsolete, indicating discontinued manufacturing and limited future availability. The AS3685A-ZWLT-2Y80 carries active status, confirming current production and sustained supply chain support. This makes the substitute part the recommended choice for new designs and long-term production requirements.

Q: Are there any compliance differences between the two parts?

A: The AS3685A-ZWLT-2Y80 is RoHS Compliant, while the main part does not specify RoHS status. Both parts are REACH Unaffected and classified as EAR99 for export control purposes. The RoHS compliance of the substitute part provides additional environmental regulatory alignment.

Q: Is the 10-DFN (3x3) package identical between both parts?

A: Yes. Both parts use the 10-VFDFN Exposed Pad package with 10-DFN (3x3) supplier device package designation. Package footprint, pin configuration, and thermal characteristics are identical, ensuring direct PCB compatibility.

Q: What is the Moisture Sensitivity Level (MSL) rating, and does it affect handling?

A: Both parts carry MSL 3 (168 Hours) rating. This indicates the component can be exposed to ambient conditions (30°C, 60% relative humidity) for a maximum of 168 hours before soldering. Standard moisture control procedures during storage and assembly apply equally to both parts.

Q: Are there inventory considerations for the substitute part?

A: The AS3685A-ZWLT-2Y80 has 2,404 units in current stock. The original AS3685A has 12,300 units available. For new designs and long-term production, the substitute part is recommended due to its active product status, despite lower current inventory levels.