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Diodes Incorporated AP1685MTR-G1
- Part No.:
- AP1685MTR-G1
- Manufacturer:
- Diodes Incorporated
- Category:
- LED Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width), 7 Leads
- Datasheet:
-
AP1685MTR-G1.pdf
- Description:
- IC LED DRIVER OFFL 2.5A 7SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,910
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Product details
Overview
AP1685MTR-G1 from Diodes Incorporated is a high-efficiency, offline AC/DC LED driver IC with integrated 500V/2.5A MOSFET, operating in Boundary Conduction Mode (BCM) to achieve >0.9 power factor and <30% THD. It delivers accurate constant-current regulation for non-dimmable LED lighting up to 10W without optocoupler or secondary feedback circuitry, used in GU10 lamps, bulb drivers, and downlights.
For engineers reviewing the AP1685MTR-G1 datasheet, AP1685MTR-G1 pinout, AP1685MTR-G1 application, or AP1685MTR-G1 equivalent, key selection criteria include its valley-switching control, internal MOSFET integration, SO-7 package thermal performance, and compliance with IEC61000-3-2 harmonic standards.
Technical Context
The AP1685MTR-G1 implements constant-on-time (COT) PFM control in BCM to synchronize inductor current with AC line voltage, enabling high PF and low THD without complex loop compensation. Its valley-switching detection uses FB pin sensing of auxiliary winding voltage to minimize turn-on losses.
Protection architecture includes UVLO (13–16V start-up), VCC OVP (27–31V), FB OVP (4.5–7.5V), output short/open detection, and thermal shutdown at +150°C with +20°C hysteresis - all implemented with internal comparators and latched logic.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Boundary Conduction Mode (BCM) buck controller with integrated MOSFET |
| Power Factor | >0.9 at full load - meets IEC61000-3-2 Class C requirements |
| THD | <30% - enables clean mains current draw in non-dimmable LED systems |
| Integrated MOSFET | 500V VBR(DSS), 2.5A ID, 6Ω RDS(ON) - eliminates external HV switch and reduces BOM count |
| Constant Current Accuracy | ±2% system output current tolerance - achieved via 1V CS reference and valley-synchronized timing |
| Operating Temp Range | −40°C to +105°C ambient - supports enclosed lamp environments with passive cooling |
| Package | SO-7 with exposed drain pad - provides 160°C/W θJA and thermal path for 10W operation |
Pinout & Package
AP1685MTR-G1 is housed in a 7-pin SOIC package (SO-7) with an exposed drain pad for thermal dissipation. Pin 7 (Drain) connects directly to the internal MOSFET's drain terminal and must be soldered to a thermal pad on PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 S | Internal MOSFET source | Reference node for current sense amplifier; connects to current sense resistor ground return |
| 2 CS | Current sense input | Monitors peak inductor current via voltage across RSENSE; triggers turn-off when VCS = 1V |
| 3 RI | Initial on-time setting | Resistor-connected pin that sets tON_INITIAL to prevent LED current overshoot at startup |
| 4 GND | Power and signal ground | Common reference for control logic, CS comparator, and FB input; must be low-impedance |
| 5 FB | Auxiliary winding feedback | Senses reflected output voltage for CV regulation and valley-switching detection (0.1V threshold) |
| 6 VCC | IC supply rail | Powered by auxiliary winding; regulated internally; features 27–31V OVP and 5.5–7.5V minimum operating voltage |
| 7 Drain | Internal MOSFET drain | High-voltage switching node connected to primary inductor; requires thermal pad and EMI filtering |
Key Features
| Feature | Design Value |
|---|---|
| Valley-switching control | Reduces MOSFET turn-on loss by triggering gate drive at drain voltage minima, improving efficiency >90% at 10W |
| Optocoupler-free regulation | Uses auxiliary winding feedback (FB pin) for both output voltage sensing and timing - eliminates isolation component and associated drift |
| Tight LED current tolerance | ±2% system-level current accuracy maintained across line, load, and temperature via 1V CS reference and COT stability |
| Comprehensive fault protection | Integrated UVLO, VCC/FB OVP, output short/open, and thermal shutdown with hiccup-mode recovery - no external protection IC needed |
| Lead-free & halogen-free packaging | SO-7 package compliant with RoHS 2 (2011/65/EU) and Diodes' "Green" standard (<900ppm Br/Cl, <1000ppm Sb) |
Applications
| GU10 Retrofit Lamps | Bulb-Type LED Drivers |
|---|---|
|
Use Scenario: Direct replacement of incandescent GU10 lamps in track lighting and spotlights using AC mains input. IC Role / Device Role / Timing Role: Primary-side constant-current controller implementing BCM PFM with valley switching to regulate LED string current without secondary feedback. Use Value: Enables compact, thermally constrained GU10 form factor with >0.9 PF and EN55022 Class B EMI margin - eliminating need for bulky electrolytic capacitors or optocouplers. |
Use Scenario: Integrated LED driver in A19/E26 screw-base bulbs for residential lighting. IC Role / Device Role / Timing Role: Standalone offline LED driver IC providing isolated or non-isolated constant current with internal 500V MOSFET and auxiliary-winding-based regulation. Use Value: Reduces bill-of-materials by 3–5 components versus discrete controller + MOSFET solutions while maintaining ±2% current accuracy over −25°C to +85°C ambient. |
| Downlight Drivers | Commercial Non-Dimmable Fixtures |
|
Use Scenario: Recessed LED downlights in office and retail ceiling installations requiring high PF and low THD. IC Role / Device Role / Timing Role: BCM-controlled buck converter delivering stable CC output to multi-LED strings, leveraging FB pin for both regulation and valley detection. Use Value: Meets commercial lighting PF >0.9 and THD <30% requirements without active PFC stage - simplifying design and lowering cost per lumen. |
Use Scenario: Fixed-output LED troffers and panel lights deployed in schools, hospitals, and government buildings. IC Role / Device Role / Timing Role: Primary-side regulated LED driver IC supporting 10W max output with built-in protections for long-life, maintenance-free operation. Use Value: Ensures field reliability via latch-type thermal shutdown (+150°C) and hiccup-mode response to output faults - reducing warranty returns in hard-to-access fixtures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar offline LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BP5758D | External MOSFET required; higher BOM count; no integrated 500V switch | Supports higher power (>15W); requires layout for HV gate drive and current sensing | Choose when >10W output or discrete MOSFET optimization is needed |
| LNK306P | No PFC capability; operates in discontinuous conduction mode; lower PF (~0.5) | Targeted at cost-sensitive, low-PF applications where IEC61000-3-2 is not mandated | Choose only for non-regulated or low-compliance markets with relaxed harmonic limits |
Compared with BP5758D and LNK306P, AP1685MTR-G1 uniquely integrates a 500V/2.5A MOSFET and achieves >0.9 PF in BCM - making it optimal for compact, compliant 5–10W non-dimmable LED drivers where BOM reduction and regulatory adherence are critical.
Availability
AP1685MTR-G1 is available at Aetrix Electronics and suitable for GU10 lamps, A19 bulb drivers, and downlight fixtures requiring stable component supply, RoHS/Green compliance, and production-ready SO-7 packaging.
Supply support for AP1685MTR-G1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design centers across Asia and manufacturing in China, Taiwan, and Malaysia.
The AP1685 belongs to Diodes' LED Driver IC product line, engineered specifically for cost-sensitive, high-PF, non-dimmable AC/DC LED lighting applications up to 10W - emphasizing integration, thermal robustness, and regulatory compliance.
FAQ
What is the maximum output power supported by AP1685MTR-G1?
The AP1685MTR-G1 supports up to 10W output power, limited by its integrated 500V/2.5A MOSFET and SO-7 package thermal resistance (160°C/W). At 10W, junction temperature remains within −40°C to +150°C rating under typical PCB copper area and ambient ≤+105°C, verified on Diodes' reference design boards.
Does AP1685MTR-G1 require an external optocoupler for regulation?
No. AP1685MTR-G1 uses primary-side regulation via the FB pin connected to an auxiliary winding on the buck inductor, eliminating the need for an optocoupler or secondary-side feedback circuit. This reduces component count, improves long-term stability, and avoids optocoupler aging-related current drift.
How does the valley-switching function improve efficiency?
Valley-switching detects the minimum drain-source voltage (via FB pin) before turning on the internal MOSFET, minimizing turn-on switching losses. This technique reduces transition loss by ~30% compared to fixed-frequency PWM in buck topologies, contributing to >90% typical efficiency at 10W output.
Can AP1685MTR-G1 be used in dimmable LED applications?
No. The AP1685MTR-G1 is explicitly designed for non-dimmable applications. It lacks TRIAC phase-cut detection, PWM dimming interface, or analog dimming input. Diodes recommends AP1686 or AP3768 for leading-edge or trailing-edge dimmable LED drivers.
AP1685MTR-G1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width), 7 Leads
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- AC DC Offline Switcher
- Topology:
- Step-Down (Buck)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 8V
- Voltage - Supply (Max):
- 25V
- Voltage - Output:
- -
- Current - Output / Channel:
- 2.5A
- Frequency:
- -
- Dimming:
- -
- Applications:
- -
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 7-SO
AP1685MTR-G1 FAQ
1.How can I place an order for AP1685MTR-G1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1685MTR-G1 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AP1685MTR-G1 reliable?
The price and inventory of AP1685MTR-G1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1685MTR-G1 is usually 5 days.
3.What payment methods are accepted for AP1685MTR-G1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1685MTR-G1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1685MTR-G1?
AP1685MTR-G1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1685MTR-G1 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AP1685MTR-G1?
For technical support, including AP1685MTR-G1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1685MTR-G1 requirements.
6.How does Aetrix verify that AP1685MTR-G1 is sourced from the original manufacturer or authorized distributors?
All AP1685MTR-G1 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AP1685MTR-G1 meets industry standards.
7.What is the process for return or replacement of AP1685MTR-G1?
All AP1685MTR-G1 units undergo pre-shipment inspection (PSI). If there is an issue with AP1685MTR-G1, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AP1685MTR-G1 part is unused and in its original packaging.
Return procedure for AP1685MTR-G1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP1685MTR-G1 Tags
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BCR402RE6327HTSA1
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BCR430UXTSA2
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BCR420UE6433HTMA1
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BCR420UE6327HTSA1
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BCR421UE6327HTSA1
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LYT1604D-TL
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HV9910CLG-G
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CL2N8-G
Microchip Technology
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BCR420UW6-7
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BCR421UW6-7
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BCR420UFD-7
Diodes Incorporated
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BCR421UFD-7
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