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Diodes Incorporated AP3983EEV1
- Part No.:
- AP3983EEV1
- Manufacturer:
- Diodes Incorporated
- Package:
- Datasheet:
-
AP3983EEV1.pdf
- Description:
- EVAL BOARD FOR AP3983E
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Product details
Overview
AP3983EEV1 from Diodes Incorporated is a high-frequency primary-side controlled power switcher IC with integrated 700 V/5 A N-channel MOSFET, designed for offline flyback SMPS in adapters, LED drivers, and auxiliary supplies. It delivers 20 W (enclosed) / 25 W (open-frame), uses piecewise PFM in DCM, features valley switching, built-in cable compensation, and operates up to 80 kHz with 4–10% frequency dithering for EMC.
For engineers reviewing the AP3983EEV1 datasheet, AP3983EEV1 pinout, AP3983EEV1 application, or AP3983EEV1 equivalent, key selection criteria include primary-side regulation capability, 700 V drain breakdown, 0.2 µA start-up current, 3.95 V feedback reference, and PDIP-7 thermal performance (θJA = 40 °C/W).
Technical Context
The AP3983EEV1 implements primary-side constant-voltage (CV) and constant-current (CC) regulation without optocoupler or secondary-side sensing. CV control uses auxiliary winding voltage feedback at FB pin with 3.95 V internal reference and ±0.06 V tolerance; CC mode activates at full load via tONS/tSW ratio control fixed at 4:8.
Its valley-switching turn-on reduces switching loss and EMI; built-in leading-edge blanking (500 ns typ.) rejects CS pin noise; internal line compensation (230 Ω typ.) and fixed 0.3 V cable drop compensation improve load regulation across input and output variations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| BVDSS | 700 V - supports universal AC input (90–264 VAC) with margin for surge and ringing |
| VFB Reference | 3.95 V ±60 mV - defines regulated output voltage via auxiliary winding turns ratio |
| fS(MAX) | 80 kHz - enables compact magnetics and reduced transformer size in 20–25 W designs |
| IST (Start-up) | 0.2 µA typ. - minimizes no-load power loss and enables high-impedance VCC startup networks |
| θJA | 40 °C/W - specifies thermal rise on standard FR-4 board; requires heatsinking above ~1.2 W dissipation |
| VCS_H | 900 mV typ. - sets peak primary current limit; determines maximum output power at given fS and Lm |
| OTP Threshold | +160 °C - provides robust overtemperature shutdown with +40 °C hysteresis for automatic recovery |
Pinout & Package
AP3983EEV1 is housed in a 7-pin plastic dual in-line package (PDIP-7) with Gull-wing leads, rated for lead temperature up to +260 °C (10 sec), RoHS-compliant, halogen- and antimony-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CPC | Cable compensation capacitor connection | Accepts external 10 nF capacitor to smooth feedback error for fixed 0.3 V output voltage drop compensation |
| 2 FB | Auxiliary winding feedback input | Senses reflected voltage during secondary conduction; closed-loop CV regulation reference point |
| 3 VCC | Internal bias supply input | Receives rectified auxiliary winding voltage; powers internal circuitry after startup |
| 4 CS | Primary current sense input | Monitors voltage across external sense resistor; triggers MOSFET turn-off at 900 mV threshold |
| 5,6 D | Integrated MOSFET drain terminal | High-side switch node connected directly to primary winding; handles 700 V blocking and 5 A continuous current |
| 7 GND | Signal ground reference | Common return for FB, CS, CPC, and internal regulator; must be low-impedance PCB plane |
Key Features
| Feature | Design Value |
|---|---|
| Primary-side regulation | Eliminates optocoupler, TL431, and secondary-side feedback components-reducing BOM count by ≥4 parts |
| Valley switching | Turns on MOSFET at drain voltage minimum-cutting switching loss by ~30% vs. hard switching and lowering EMI peaks |
| Hiccup-mode SCP | Enters burst-mode shutdown on sustained short-circuit-limiting average power to <100 mW and preventing thermal runaway |
| Line voltage compensation | 230 Ω internal resistor adjusts CV loop gain vs. input voltage-maintaining ±1% output regulation across 90–264 VAC |
| Fixed cable compensation | 0.3 V offset applied to FB reference-compensating for typical 200–500 mΩ cable resistance at full load |
Applications
| Adapter Power Supply | LED Lighting Driver |
|---|---|
Use Scenario: 12 V/1.5 A wall adapter for broadband modems and set-top boxes operating from 90–264 VAC. IC Role / Device Role / Timing Role: Primary-side controller executing p-PFM in DCM; regulates output via auxiliary winding feedback and valley-switched MOSFET gate drive. Use Value: Achieves >85% efficiency at full load and meets EN55022 Class B conducted EMI without Y-cap or common-mode choke. | Use Scenario: Constant-current LED driver for commercial downlights with 36 V/350 mA output in open-frame design. IC Role / Device Role / Timing Role: Dual-mode controller: CV for startup and OVP protection, CC for steady-state LED current regulation via tONS/tSW ratio lock. Use Value: Maintains ±3% LED current accuracy across line and temperature with no secondary shunt regulator or current-sense amplifier. |
| Appliance Auxiliary Supply | PC Standby Power |
Use Scenario: 5 V/1 A auxiliary rail for smart refrigerator control boards requiring low standby consumption. IC Role / Device Role / Timing Role: Low-power primary-side switcher using 0.2 µA start-up current and deep-light-load frequency foldback (down to 1.8 kHz). Use Value: Delivers <75 mW no-load input power-meeting Energy Star 7.0 and ERP Tier 2 standby requirements. | Use Scenario: +5 VSB rail in ATX PSUs powering motherboard logic during S5 sleep state. IC Role / Device Role / Timing Role: Standby controller managing hold-up time and brown-out recovery via UVLO (6.8 V turn-off) and fast restart capability. Use Value: Ensures reliable 5 VSB delivery during AC dips to 90 VAC with hiccup-mode recovery from overload transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar primary-side flyback controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP6004GJ-Z | Higher VCC max (36 V), no integrated MOSFET, requires external 650 V FET | Supports higher power (>30 W) but increases component count and layout complexity | Select when >25 W output or tighter VCC headroom needed; not drop-in due to missing MOSFET and different pinout |
| LNK364PG | Lower BVDSS (700 V same), no valley switching, fixed 66 kHz frequency, no cable compensation | Lacks dynamic cable/line compensation and frequency dithering-requires additional filtering for EMI compliance | Choose for cost-sensitive <15 W designs where ±5% output regulation and basic EMI pass are sufficient |
Compared with MP6004GJ-Z and LNK364PG, AP3983EEV1 uniquely integrates a 700 V MOSFET with valley switching, built-in cable compensation, and programmable frequency dithering-enabling compact, low-BOM, Class B EMI-compliant 20–25 W adapters without secondary feedback.
Availability
AP3983EEV1 is available at Aetrix Electronics and suitable for adapter power supplies, LED lighting drivers, appliance auxiliary supplies, and PC standby power rails requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.
Supply support for AP3983EEV1 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, Malaysia, and Taiwan.
The AP3983EEV1 belongs to Diodes' Advanced Primary-Side Regulation (APSR) controller product line, engineered specifically for cost-sensitive, high-efficiency offline flyback converters targeting consumer and industrial power adapters.
FAQ
What is the recommended external capacitor value for the CPC pin?
The AP3983EEV1 datasheet specifies a 10 nF ceramic capacitor (0805, X7R) between CPC pin and GND. This value provides optimal smoothing of the cable compensation signal while maintaining stability across temperature and line/load transients. Larger values may cause slow response to load steps; smaller values reduce compensation effectiveness below 5% load.
Does AP3983EEV1 support quasi-resonant (QR) operation?
No-the AP3983EEV1 implements valley switching but does not perform full QR operation. It detects the first valley after leading-edge blanking and triggers turn-on deterministically, without adaptive timing or resonant frequency tracking. Its p-PFM architecture prioritizes light-load efficiency and EMI reduction over zero-voltage switching optimization.
How is overvoltage protection (OVP) implemented on the FB pin?
OVP triggers when FB voltage exceeds 7.5 V (typ.), independent of CV loop operation. Upon detection, the IC disables switching and enters hiccup mode-holding off for ~1 s before attempting restart. This protects downstream loads from catastrophic failure due to auxiliary winding fault or transformer saturation, with no external components required.
Can AP3983EEV1 be used in continuous conduction mode (CCM)?
No-the AP3983EEV1 is designed exclusively for discontinuous conduction mode (DCM) operation. Its p-PFM control algorithm, valley detection circuit, and current-sense timing rely on complete demagnetization of the transformer each cycle. Attempting CCM results in unstable regulation, excessive MOSFET stress, and potential thermal shutdown.
AP3983EEV1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Main Purpose:
- AC/DC, Primary Side
- Outputs and Type:
- -
- Voltage - Output:
- -
- Current - Output:
- -
- Voltage - Input:
- -
- Regulator Topology:
- -
- Frequency - Switching:
- -
- Contents:
- -
- Utilized IC / Part:
- Board(s)
- Power - Output:
- AP3983E
AP3983EEV1 FAQ
1.How can I place an order for AP3983EEV1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP3983EEV1 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 AP3983EEV1 reliable?
The price and inventory of AP3983EEV1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP3983EEV1 is usually 5 days.
3.What payment methods are accepted for AP3983EEV1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP3983EEV1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP3983EEV1?
AP3983EEV1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP3983EEV1 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 AP3983EEV1?
For technical support, including AP3983EEV1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP3983EEV1 requirements.
6.How does Aetrix verify that AP3983EEV1 is sourced from the original manufacturer or authorized distributors?
All AP3983EEV1 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 AP3983EEV1 meets industry standards.
7.What is the process for return or replacement of AP3983EEV1?
All AP3983EEV1 units undergo pre-shipment inspection (PSI). If there is an issue with AP3983EEV1, 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 AP3983EEV1 part is unused and in its original packaging.
Return procedure for AP3983EEV1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AP3983EEV1 Tags
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