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Diodes Incorporated AP3983DP7-G1
- Part No.:
- AP3983DP7-G1
- Manufacturer:
- Diodes Incorporated
- Category:
- AC DC Converters, Offline Switches
- Package:
- 8-DIP (0.300", 7.62mm), 7 Leads
- Datasheet:
-
AP3983DP7-G1.pdf
- Description:
- IC OFFLINE SWITCH FLYBACK 7DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,737
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Product details
Overview
AP3983DP7-G1 from Diodes Incorporated is a high-frequency primary-side controlled power switcher IC with integrated 650V N-channel MOSFET, designed for offline flyback SMPS in 18W adapters. It delivers ±2% output voltage accuracy via auxiliary winding feedback, supports piece-wise PFM control in DCM, and includes built-in cable drop compensation (6.00% typical), line voltage compensation (230Ω internal resistor), and hiccup-mode short-circuit protection. Used in compact 5V/3.6A or 12V/1.5A AC-DC adapters for consumer electronics.
For engineers reviewing the AP3983DP7-G1 datasheet, AP3983DP7-G1 pinout, AP3983DP7-G1 application, or AP3983DP7-G1 equivalent, key selection criteria include primary-side regulation capability, 650V MOSFET BVDSS rating, 4A continuous drain current, PDIP-7 thermal performance (θJA = 70°C/W), and dithering-enabled EMC compliance in low-component-count adapter designs.
Technical Context
The AP3983DP7-G1 implements primary-side constant-voltage (CV) and constant-current (CC) regulation without optocouplers by sampling auxiliary winding voltage at the FB pin and sensing primary peak current via the CS pin. Its p-PFM control reduces switching frequency linearly from full to light load while maintaining stable regulation across 90–264VAC input.
It integrates a 650V/4A MOSFET with RDS(ON) ≤3Ω, features 500ns leading-edge blanking on CS, and uses internal timing circuits to enforce tONS/tSW ratio of 4:8 in CC mode. The CPC pin enables fixed 0.3V cable compensation using an external 10nF capacitor, and VFB reference is trimmed to 3.95V ±0.06V for tight CV accuracy.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| BVDSS | 650V - Withstands up to 650V drain-source breakdown, enabling direct connection to 264VAC rectified input without external snubber. |
| ID (Continuous) | 4A - Supports up to 18W continuous output power in non-ventilated enclosed adapters at +50°C ambient. |
| fS(MAX) | 80kHz - Maximum operating frequency ensures small transformer size and EMI control; dithered ±7% over load range. |
| VFB Reference | 3.95V ±0.06V - Enables ±2% output voltage regulation without secondary-side feedback components. |
| Cable Compensation | 6.00% typical - Compensates for voltage drop across USB/DC cables under full-load conditions, preserving regulated output at load end. |
| Thermal Impedance θJA | 70°C/W - Achieved in PDIP-7 package on standard FR-4 board, allowing reliable operation up to +105°C ambient. |
| Start-up Current | 0.2µA typical - Enables ultra-low-power start-up directly from bulk capacitor, reducing no-load consumption. |
Pinout & Package
Packaged in PDIP-7 (Plastic Dual In-line Package, 7-pin), the AP3983DP7-G1 features through-hole mounting with 2.54mm pin pitch and 7.32mm body width. Thermal resistance θJC = 35°C/W supports efficient heat transfer to PCB copper pour.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (CPC) | Cable compensation capacitor terminal | Connects external 10nF capacitor to GND to smooth compensation signal; enables fixed 0.3V output voltage offset for cable loss correction. |
| 2 (FB) | Auxiliary winding feedback input | Samples reflected voltage from transformer auxiliary winding to regulate output voltage without optocoupler or TL431. |
| 3 (VCC) | Internal bias supply input | Receives rectified auxiliary winding voltage to power internal circuitry; UVLO turns device off below 6.8V and on above 15.5V. |
| 4 (CS) | Primary current sense input | Monitors voltage across external sense resistor to detect peak primary current; triggers MOSFET turn-off at 900mV threshold. |
| 5,6 (D) | Integrated MOSFET drain terminals | Dual-drain pins reduce conduction losses and improve thermal spreading; connected internally to 650V/4A N-channel MOSFET. |
| 7 (GND) | Signal reference ground | Common return path for FB, CS, CPC, and internal regulator; must be routed with low impedance to minimize noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Primary-side regulation | Eliminates optocoupler, TL431, and secondary-side feedback network-reducing BOM count by ≥4 components and PCB area by >30%. |
| Frequency dithering | 7% modulation depth across 5–100% load range lowers peak EMI amplitude by spreading energy over wider spectrum bandwidth. |
| Hiccup-mode SCP | Enters low-duty-cycle restart cycle upon short-circuit detection (VFB ≤1.5V), limiting average power dissipation to <100mW during fault. |
| Line voltage compensation | 230Ω internal resistor adjusts CV reference vs. input voltage, maintaining ±3% output regulation across 90–264VAC input range. |
| Low start-up current | 0.2µA enables direct start-up from bulk capacitor without auxiliary winding or startup resistor-reducing no-load power to <30mW. |
Applications
| USB-C Wall Adapters | LED Driver Power Supplies |
|---|---|
|
Use Scenario: Compact 5V/3.6A USB-C wall charger for smartphones and tablets operating from universal 90–264VAC input. IC Role / Device Role / Timing Role: Primary-side controller regulating output voltage and current via auxiliary winding feedback and primary current sensing in DCM flyback topology. Use Value: Achieves 18W output with only 12 external components, meets DOE VI/CoC Tier 2 efficiency requirements, and passes EN55032 Class B conducted EMI with minimal filtering. |
Use Scenario: Constant-current LED driver for commercial downlights requiring 36V/0.5A output with high line regulation. IC Role / Device Role / Timing Role: Implements combined CV/CC regulation-switching from voltage mode to current mode at programmed IOUT threshold using tONS/tSW = 4:8 timing control. Use Value: Maintains ±3% LED current accuracy across input line variations and temperature drift, eliminating need for secondary shunt regulator or current-sense amplifier. |
| Set-Top Box Auxiliary Supplies | Home Appliance Control Power |
|
Use Scenario: 12V/1.5A auxiliary power supply for digital set-top boxes with standby power <150mW requirement. IC Role / Device Role / Timing Role: Controls discontinuous conduction mode flyback converter with p-PFM to scale frequency from 80kHz (full load) to 2.0kHz (no load), minimizing switching losses at light loads. Use Value: Delivers <80mW no-load consumption and meets IEC62301 Ed.2.0 standby power limits without auxiliary bias winding or Zener clamp. |
Use Scenario: Isolated 5V/0.8A control supply for washing machine mainboard, exposed to wide ambient temperature (-25°C to +70°C). IC Role / Device Role / Timing Role: Provides over-temperature shutdown at +160°C with +40°C hysteresis and operates continuously from -40°C to +105°C junction temperature. Use Value: Ensures system-level reliability without external thermal monitoring; built-in OTP eliminates need for discrete NTC or thermal switch. |
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 |
|---|---|---|---|
| MP6004DJ-LF-Z (Monolithic Power) | 650V MOSFET, 3.5A ID, SOIC-8 package, no built-in cable compensation | Requires external RC network for cable drop correction; higher component count for same functionality | Select when SOIC-8 footprint compatibility is required and cable compensation is implemented externally. |
| LNK364PG (Power Integrations) | 725V MOSFET, 245mW max no-load, integrated X-cap discharge, no dithering | Lacks frequency dithering-requires larger EMI filter for same conducted emissions performance | Select for ultra-low standby power designs where EMI filter size is less critical than no-load consumption. |
Compared with MP6004DJ-LF-Z and LNK364PG, the AP3983DP7-G1 uniquely combines PDIP-7 thermal robustness (70°C/W), integrated 6.00% cable compensation, and 7% frequency dithering-enabling lower-cost, smaller-footprint 18W adapters meeting both efficiency and EMI standards without design compromises.
Availability
AP3983DP7-G1 is available at Aetrix Electronics and suitable for USB-C wall adapters, LED driver power supplies, set-top box auxiliary supplies, and home appliance control power requiring stable component supply and long-term industrial availability.
Supply support for AP3983DP7-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 semiconductor company specializing in discrete, analog, and mixed-signal devices, with manufacturing certified to IATF 16949 and product lines compliant with AEC-Q100/101/200 standards.
The AP3983 series belongs to Diodes' AC-DC primary-side controller product line, engineered specifically for cost-sensitive, space-constrained offline SMPS in consumer and industrial adapter applications-emphasizing integration, efficiency, and regulatory compliance.
FAQ
What is the maximum continuous output power supported by AP3983DP7-G1?
The AP3983DP7-G1 supports up to 18W continuous output power in a non-ventilated enclosed adapter at +50°C ambient temperature, as validated per Diodes' DS36784 Rev. 5–3 test conditions. This rating assumes use of PDIP-7 package, proper PCB copper pour, and operation within recommended junction temperature limits (–40°C to +105°C).
Does AP3983DP7-G1 require an external optocoupler for regulation?
No. The AP3983DP7-G1 performs primary-side regulation by sampling voltage from the transformer's auxiliary winding at the FB pin, eliminating the need for an optocoupler, TL431, or secondary-side feedback circuit. This reduces component count, improves reliability, and simplifies layout in compact adapter designs.
How does the built-in cable compensation function work?
The CPC pin connects to an external 10nF capacitor to ground, enabling fixed 0.3V compensation offset. Combined with internal circuitry, this achieves 6.00% typical cable voltage drop compensation-adjusting the FB reference to maintain regulated output voltage at the load end despite IR drop across USB or DC cables under full-load conditions.
What protection features are integrated into AP3983DP7-G1?
The AP3983DP7-G1 integrates over-voltage protection (OVP) triggering at 7.5V FB voltage, hiccup-mode short-circuit protection (SCP) activating at 1.5V FB, over-temperature protection (OTP) shutting down at +160°C with +40°C hysteresis, and leading-edge blanking (500ns) on the CS pin to prevent false current-sense triggering during MOSFET turn-on spikes.
AP3983DP7-G1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm), 7 Leads
- Packaging:
- Tube
- Product Status:
- Obsolete
- Output Isolation:
- Isolated
- Internal Switch(s):
- Yes
- Voltage - Breakdown:
- 650V
- Topology:
- Flyback
- Voltage - Start Up:
- 15.5 V
- Voltage - Supply (Vcc/Vdd):
- 6.82V ~ 25V
- Duty Cycle:
- -
- Frequency - Switching:
- 65kHz
- Power (Watts):
- 18 W
- Fault Protection:
- Over Temperature, Over Voltage, Short Circuit
- Control Features:
- -
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 7-PDIP
- Mounting Type:
- Through Hole
AP3983DP7-G1 FAQ
1.How can I place an order for AP3983DP7-G1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP3983DP7-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 AP3983DP7-G1 reliable?
The price and inventory of AP3983DP7-G1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP3983DP7-G1 is usually 5 days.
3.What payment methods are accepted for AP3983DP7-G1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP3983DP7-G1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP3983DP7-G1?
AP3983DP7-G1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP3983DP7-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 AP3983DP7-G1?
For technical support, including AP3983DP7-G1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP3983DP7-G1 requirements.
6.How does Aetrix verify that AP3983DP7-G1 is sourced from the original manufacturer or authorized distributors?
All AP3983DP7-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 AP3983DP7-G1 meets industry standards.
7.What is the process for return or replacement of AP3983DP7-G1?
All AP3983DP7-G1 units undergo pre-shipment inspection (PSI). If there is an issue with AP3983DP7-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 AP3983DP7-G1 part is unused and in its original packaging.
Return procedure for AP3983DP7-G1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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