AL9902FDF-13 Equivalent & Substitute Parts

Part Overview

The AL9902FDF-13 is an AC DC offline switcher LED driver IC manufactured by Diodes Incorporated, designed for single-output applications requiring step-down (buck) and step-up (boost) topology with analog and PWM dimming capabilities. This component operates across a wide supply voltage range of 20V to 500V and delivers 400mA output current, making it suitable for backlight, lighting, and signage applications. The part is currently active in production. Substitute parts may be required due to supply constraints, design optimization, or application-specific performance requirements.

Substiute Parts

AL9902FDF-13

Diodes IncorporatedIn Stock: 1068AL9902FDF-13 Datasheet

Current PartRFQ

TPS92075DDC/NOPB

Texas InstrumentsIn Stock: 1840TPS92075DDC/NOPB Datasheet

MFR RecommendedRFQ

TS19730CX6 RFG

Taiwan Semiconductor CorporationIn Stock: 44327TS19730CX6 RFG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AL9902FDF-13 is determined by the following critical parameters:

• Type & Topology: AC DC offline switcher with step-down (buck) and step-up (boost) capability
• Number of Outputs: Single output configuration
• Supply Voltage Range: Minimum 20V and maximum 500V operation
• Output Current: 400mA capability
• Dimming Support: Analog and/or PWM dimming functionality
• Internal Switch: Presence of integrated switching element
• Compliance: ROHS3 compliance and EAR99 classification

The substitute parts listed below meet the core functional requirements of AC DC offline switching with single-output LED driver capability. However, variations in supply voltage range, output current specifications, dimming method, package type, and operating temperature range exist and must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

TPS92075DDC/NOPB (Texas Instruments)

This substitute is suitable for applications where supply voltage operates within the 11V to 18V range. The part features triac dimming capability, which differs from the analog and PWM dimming of the main part. The absence of an internal switch requires external switching implementation. Operating temperature range extends to 125°C (TJ), providing enhanced thermal performance. Moisture sensitivity level is 1 (unlimited), indicating superior moisture resistance compared to the main part. Product status is active, ensuring continued availability. ROHS3 compliance and EAR99 classification are maintained.

TS19730CX6 RFG (Taiwan Semiconductor Corporation)

This substitute operates within a supply voltage range of 8V to 33V with a specified 19V output. The part includes an internal switch and is suitable for applications within the -40°C to 85°C operating temperature range. Product status is obsolete, indicating this part is no longer in active production and may face supply discontinuation. Moisture sensitivity level is 3 (168 Hours), matching the main part. ROHS3 compliance and EAR99 classification are maintained. Selection of this part should account for long-term availability constraints.

Frequently Asked Questions (FAQ)

Q: Can TPS92075DDC/NOPB directly replace AL9902FDF-13 in all applications?

A: Direct replacement is not universal. The TPS92075DDC/NOPB operates within a narrower supply voltage range (11V to 18V) compared to the AL9902FDF-13 (20V to 500V). Additionally, triac dimming differs from analog and PWM dimming. The absence of an internal switch requires external circuit modifications. Application-specific evaluation is necessary.

Q: Why is TS19730CX6 RFG listed as a substitute if it is obsolete?

A: The TS19730CX6 RFG meets the core functional criteria for AC DC offline switching with single-output LED driver capability and is included for reference. However, its obsolete status means production has ceased. Existing inventory may be available through authorized distributors, but long-term supply cannot be assured. New designs should prioritize active-status alternatives.

Q: What are the key differences in package types between these parts?

A: The AL9902FDF-13 uses a 12-UDFN exposed pad package. The TPS92075DDC/NOPB uses SOT-23-6 thin (TSOT-23-6) packaging. The TS19730CX6 RFG uses SOT-23-6 packaging. Package differences affect PCB layout, thermal management, and board space requirements. Footprint compatibility must be verified during design integration.

Q: How do supply voltage ranges affect substitution decisions?

A: The AL9902FDF-13 supports 20V to 500V input, enabling operation across wide voltage applications. The TPS92075DDC/NOPB is limited to 11V to 18V, restricting use to lower-voltage systems. The TS19730CX6 RFG operates from 8V to 33V, providing intermediate range coverage. Application input voltage specifications must align with substitute part ratings.

Q: What is the significance of internal switch presence?

A: The AL9902FDF-13 and TS19730CX6 RFG include integrated switching elements, simplifying circuit design. The TPS92075DDC/NOPB lacks an internal switch, requiring external switching implementation and additional circuit complexity. This affects bill of materials, PCB area, and overall system design approach.

Q: Are all listed substitutes ROHS3 compliant?

A: Yes. The AL9902FDF-13, TPS92075DDC/NOPB, and TS19730CX6 RFG are all ROHS3 compliant and carry EAR99 classification, meeting regulatory requirements for restricted substance use and export control.