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AP3039FNTR-G1 LED Driver Controller: Equivalent & Substitute Parts
Part Overview
The AP3039FNTR-G1 is a LED Driver IC manufactured by Diodes Incorporated, classified as a Power Management PMIC. This device functions as a 1-output DC DC controller with Step-Up (Boost) topology, designed for backlight applications. The part operates across a 5V to 27V supply range with a switching frequency of 150kHz to 1MHz and is housed in a 16-QFN (3x3) package with exposed pad.
The AP3039FNTR-G1 carries an Obsolete product status. Identifying equivalent and substitute parts is essential for design continuity, procurement planning, and ensuring long-term product availability in applications where this controller is currently deployed.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | AP3039FNTR-G1 |
| Manufacturer | Diodes Incorporated |
| Category | Power Management (PMIC) |
| Type | DC DC Controller |
| Topology | Step-Up (Boost) |
| Number of Outputs | 1 |
| Voltage - Supply (Min) | 5V |
| Voltage - Supply (Max) | 27V |
| Frequency | 150kHz ~ 1MHz |
| Applications | Backlight |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Package / Case | 16-VFQFN Exposed Pad |
| Supplier Device Package | 16-QFN (3x3) |
| Product Status | Obsolete |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 3 (168 Hours) |
Substitute Part Grouping Explanation
Substitution eligibility for the AP3039FNTR-G1 is determined by the following critical parameters:
- DC DC Controller Type: All substitutes must function as DC DC controllers for LED driver applications
- Topology Compatibility: Primary substitutes maintain Step-Up (Boost) topology; secondary substitutes may employ alternative topologies (Step-Down, SEPIC, Flyback) if supply voltage and output requirements align
- Supply Voltage Range: Substitute parts must accommodate the 5V to 27V input range or provide overlap within this specification
- Switching Frequency: Operating frequency range of 150kHz to 1MHz ensures compatibility with existing circuit designs
- Package Form Factor: 16-QFN (3x3) package is the primary mechanical constraint; alternative packages are listed where pin-compatible layouts exist
- Operating Temperature: Minimum -40°C to 85°C operating range must be met or exceeded
- Product Status & Compliance: Active or Not For New Designs status with ROHS3 compliance ensures regulatory alignment
The following substitute parts meet these criteria and are grouped by topology and supply voltage characteristics.
Parameter Comparison
| Parameter | AP3039FNTR-G1 | HV9961NG-G | LT3756IUD-1#PBF | LT3763IFE#TRPBF | LT3796HFE#TRPBF | TPS92023D | TS19375CS RLG |
|---|---|---|---|---|---|---|---|
| Manufacturer | Diodes Inc. | Microchip | Analog Devices | Analog Devices | Analog Devices | Texas Instruments | Taiwan Semiconductor |
| Type | DC DC Controller | DC DC Controller | DC DC Controller | DC DC Controller | DC DC Controller | DC DC Controller | DC DC Controller |
| Topology | Step-Up (Boost) | Step-Down (Buck) | Flyback, SEPIC, Buck, Boost | Step-Down (Buck) | SEPIC, Buck, Boost | Half-Bridge | Step-Up (Boost) |
| Number of Outputs | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Voltage - Supply (Min) | 5V | 8V | 6V | 6V | 6V | 11.5V | 3V |
| Voltage - Supply (Max) | 27V | 450V | 100V | 60V | 100V | 18V | 24V |
| Frequency | 150kHz ~ 1MHz | — | 100kHz ~ 1MHz | 200kHz ~ 1MHz | 100kHz ~ 1MHz | — | 500kHz |
| Dimming | — | Analog, PWM | Analog, PWM | PWM | Analog, PWM | — | — |
| Applications | Backlight | Backlight, Lighting, Signage | — | — | — | Backlight, Lighting | Backlight |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 125°C (TA) | -40°C ~ 125°C (TJ) | -40°C ~ 125°C (TJ) | -40°C ~ 150°C (TJ) | -40°C ~ 125°C (TJ) | -20°C ~ 125°C (TJ) |
| Package / Case | 16-VFQFN Exposed Pad | 16-SOIC (0.154", 3.90mm Width) | 16-WFQFN Exposed Pad | 28-TSSOP (0.173", 4.40mm Width) Exposed Pad | 28-TSSOP (0.173", 4.40mm Width) Exposed Pad | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) |
| Product Status | Obsolete | Active | Active | Active | Active | Active | Not For New Designs |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| MSL | 3 (168 Hours) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 3 (168 Hours) |
Engineering Selection Recommendations
Primary Substitutes (Active Status, Topology Match)
LT3756IUD-1#PBF and LT3796HFE#TRPBF from Analog Devices represent the most direct substitutes. Both are Active products with ROHS3 compliance and MSL 1 rating, providing superior moisture handling compared to the obsolete AP3039FNTR-G1. LT3756IUD-1#PBF supports multiple topologies including Step-Up (Boost) with a 6V to 100V supply range and 100kHz to 1MHz frequency band. LT3796HFE#TRPBF extends the operating temperature to 150°C and supports SEPIC, Step-Down, and Step-Up topologies across 6V to 100V input range.
Secondary Substitutes (Active Status, Alternative Topology)
HV9961NG-G from Microchip Technology operates as a Step-Down (Buck) controller with an extended 8V to 450V supply range, suitable for applications where input voltage exceeds the AP3039FNTR-G1 specification. LT3763IFE#TRPBF provides Step-Down (Buck) topology with PWM dimming across 6V to 60V input range and 200kHz to 1MHz frequency.
Tertiary Substitutes (Active Status, Limited Compatibility)
TPS92023D from Texas Instruments employs Half-Bridge topology with a narrower 11.5V to 18V supply range, limiting applicability to designs within this voltage window. TS19375CS RLG from Taiwan Semiconductor maintains Step-Up (Boost) topology with 3V to 24V supply range but carries Not For New Designs status, making it suitable only for legacy design continuity.
Compliance & Regulatory Alignment
All recommended substitutes maintain ROHS3 compliance and REACH Unaffected status, ensuring regulatory alignment with the original AP3039FNTR-G1. Active product status for LT3756IUD-1#PBF, LT3763IFE#TRPBF, LT3796HFE#TRPBF, and HV9961NG-G provides long-term availability and manufacturing support.
Frequently Asked Questions (FAQ)
Q: Can I directly replace the AP3039FNTR-G1 with any of these substitutes without circuit modification?
A: Direct pin-for-pin replacement is not possible due to package differences. The AP3039FNTR-G1 uses 16-QFN (3x3), while most substitutes employ different packages (16-SOIC, 28-TSSOP, 8-SOIC). Circuit board layout redesign is required. LT3756IUD-1#PBF uses 16-WFQFN Exposed Pad, which is mechanically similar but requires pinout verification.
Q: Which substitute best matches the original AP3039FNTR-G1 specifications?
A: LT3756IUD-1#PBF and LT3796HFE#TRPBF provide the closest functional match. Both support Step-Up (Boost) topology, operate across overlapping supply voltage ranges (6V to 100V), and maintain compatible switching frequency bands (100kHz to 1MHz). LT3796HFE#TRPBF extends operating temperature to 150°C, exceeding the original 85°C specification.
Q: What is the impact of topology differences when substituting?
A: Topology differences (Step-Down vs. Step-Up vs. SEPIC) fundamentally alter circuit behavior and require complete redesign of the power stage, including inductor, capacitor, and diode selection. HV9961NG-G (Step-Down) and LT3763IFE#TRPBF (Step-Down) are suitable only for applications where input voltage exceeds desired output voltage. LT3756IUD-1#PBF and LT3796HFE#TRPBF support multiple topologies, offering design flexibility.
Q: Are there supply chain advantages to selecting an Active product over Not For New Designs status?
A: Yes. Active products (LT3756IUD-1#PBF, LT3763IFE#TRPBF, LT3796HFE#TRPBF, HV9961NG-G) receive ongoing manufacturing support, extended availability windows, and stable pricing. TS19375CS RLG carries Not For New Designs status, indicating limited future availability and potential supply discontinuation.
Q: How do MSL ratings affect component handling and storage?
A: The AP3039FNTR-G1 carries MSL 3 (168 Hours), requiring bake-out procedures before reflow soldering if storage exceeds 168 hours at 30°C/60% RH. Most substitutes feature MSL 1 (Unlimited), eliminating moisture sensitivity constraints and reducing manufacturing process complexity. TS19375CS RLG also carries MSL 3, matching the original specification.
Q: What dimming capabilities do these substitutes provide?
A: The AP3039FNTR-G1 does not specify dimming functionality. LT3756IUD-1#PBF, LT3763IFE#TRPBF, and LT3796HFE#TRPBF support Analog and/or PWM dimming, enabling brightness control in backlight applications. HV9961NG-G supports Analog and PWM dimming. TPS92023D and TS19375CS RLG do not specify dimming capability.
Q: Which substitute offers the widest operating temperature range?
A: LT3796HFE#TRPBF operates across -40°C to 150°C (TJ), providing the widest temperature specification. This exceeds the AP3039FNTR-G1 (-40°C to 85°C TA) by 65°C, offering enhanced thermal margin for high-temperature applications.
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