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Diodes Incorporated AP3983BMTR-G1
- Part No.:
- AP3983BMTR-G1
- Manufacturer:
- Diodes Incorporated
- Category:
- AC DC Converters, Offline Switches
- Package:
- 8-SOIC (0.154", 3.90mm Width), 7 Leads
- Datasheet:
-
AP3983BMTR-G1.pdf
- Description:
- IC OFFLINE SWITCH FLYBACK 7SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,601
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Product details
Overview
AP3983BMTR-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 chargers and LED drivers. It delivers 6W output power, supports piece-wise PFM control in DCM mode, features 900mV current-sense threshold, 3.95V feedback reference, and built-in cable compensation for ±6% VOUT regulation across load range.
For engineers reviewing the AP3983BMTR-G1 datasheet, AP3983BMTR-G1 pinout, AP3983BMTR-G1 application, or AP3983BMTR-G1 equivalent, this device serves as a cost-optimized, optocoupler-free solution for compact AC/DC adapters requiring stable CV/CC regulation, hiccup-mode short-circuit protection, and 80kHz max switching frequency with dithering for EMC compliance.
Technical Context
The AP3983BMTR-G1 implements primary-side regulation using auxiliary winding feedback (FB pin) to eliminate optocouplers and TL431. Its constant-voltage loop maintains 3.95V ±6mV at FB across line/load variations, while constant-current mode enforces fixed tONS/tOFFS = 4:8 ratio for precise current limiting.
It integrates a 650V/1A MOSFET with 12Ω RDS(ON), operates from 13V turn-on to 6.8V UVLO, draws only 0.2µA startup current, and includes leading-edge blanking (500ns), thermal shutdown at +160°C, and 7% frequency dithering over 1.8–80kHz range to reduce EMI peaks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Power | 6W continuous at +50°C ambient - enables compact non-ventilated adapter designs |
| VFB Reference | 3.95V ±6mV - sets regulated output voltage via auxiliary winding turns ratio |
| VCS_H Threshold | 900mV typical - determines peak primary current and thus power delivery capability |
| fS(MAX) | 80kHz - defines minimum transformer size and core loss trade-off |
| RDS(ON) | 12Ω max - limits conduction loss in integrated MOSFET at rated 1A drain current |
| Cable Compensation | 6.00% typical - offsets ~0.3V drop across output cables under full load |
| Startup Current | 0.2µA typical - reduces no-load power consumption and enables high-impedance VCC startup networks |
Pinout & Package
AP3983BMTR-G1 is housed in a 7-pin SOIC package (SO-7) with gull-wing leads, optimized for surface-mount assembly and thermal performance (θJA = 95°C/W on standard FR-4).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 CPC | Cable compensation capacitor connection | External 10nF capacitor sets fixed 0.3V compensation offset for output voltage droop correction |
| 2 FB | Auxiliary winding feedback input | Monitors reflected voltage to regulate output without secondary-side sensing components |
| 3 VCC | Internal bias supply input | Receives rectified auxiliary winding voltage; powers internal circuitry after startup |
| 4 CS | Primary current sense input | Connects to current-sense resistor; triggers MOSFET turn-off at 900mV threshold |
| 5,6 D | Integrated MOSFET drain terminal | High-side switch node connected directly to primary winding; rated 650V BVDSS |
| 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 and TL431, reducing BOM count by ≥3 components and PCB area by >25% |
| Hiccup-mode SCP | Shuts down during sustained overload and auto-restarts after cooldown, preventing thermal runaway |
| Line voltage compensation | 230Ω internal resistor enables automatic adjustment of current limit vs. input voltage |
| Frequency dithering | ±7% modulation across 1.8–80kHz range spreads EMI energy and eases EN55032 Class B compliance |
| Low-startup current | 0.2µA enables use of high-value startup resistors (>2MΩ), cutting standby power below 30mW |
Applications
| USB Wall Charger | LED Driver for Smart Bulbs |
|---|---|
Use Scenario: 5V/1.2A USB-A adapter powering smartphones in residential environments. IC Role / Device Role / Timing Role: Primary-side controller regulating output voltage and current using auxiliary winding feedback and p-PFM modulation. Use Value: Achieves <4.3V dynamic output dip under 500mA step load, meeting USB-IF ripple requirements without secondary feedback. |
Use Scenario: Dimmable 12V/0.5A LED driver inside enclosed smart bulb housing. IC Role / Device Role / Timing Role: Constant-current controller maintaining stable LED current across 90–264VAC input range via tONS/tOFFS ratio control. Use Value: Delivers ±3% current accuracy over temperature, enabling consistent lumen output without external current-sense amplifiers. |
| Set-Top Box Auxiliary Supply | Home Appliance Control Board PSU |
Use Scenario: 12V/0.3A standby supply for IPTV set-top box with always-on Ethernet PHY. IC Role / Device Role / Timing Role: Low-power flyback controller operating in deep-light-load p-PFM mode with 1.8kHz min frequency. Use Value: Maintains <350µA no-load input current, enabling Energy Star Level VI compliance for standby power. |
Use Scenario: 5V/0.8A isolated supply for MCU and sensors in washing machine control board. IC Role / Device Role / Timing Role: Robust primary-side switcher with OVP (7.5V), OTP (+160°C), and hiccup protection for harsh industrial environments. Use Value: Survives 10kV ESD (HBM) and 200V MM events per spec, eliminating need for external TVS on VCC/FB lines. |
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 | Higher 100kHz fS(MAX), no integrated MOSFET, requires external 650V FET | Supports up to 10W but increases BOM count and layout complexity | Choose when higher power density is needed and discrete FET selection is preferred |
| LNK364PG | Lower 650V BVDSS, 700mV VCS, no cable compensation, SO-8 package | Limited to 5W output; lacks programmable line compensation and dithering | Choose for cost-sensitive legacy designs where ±6% cable drop is acceptable |
Compared with MP6004DJ-LF-Z and LNK364PG, AP3983BMTR-G1 offers integrated MOSFET + cable compensation + dithering in SO-7, delivering lowest component count for 6W adapters needing tight CV/CC regulation and robust EMC performance.
Availability
AP3983BMTR-G1 is available at Aetrix Electronics and suitable for USB wall chargers, LED lighting drivers, set-top box auxiliary supplies, and home appliance control board PSUs requiring stable component supply and RoHS-compliant manufacturing.
Supply support for AP3983BMTR-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 solutions for power management, signal integrity, and connectivity applications.
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 power adapters.
FAQ
What is the maximum recommended output power for AP3983BMTR-G1?
The AP3983BMTR-G1 is rated for 6W continuous output power in a non-ventilated enclosed adapter at +50°C ambient temperature. This rating assumes proper PCB copper area (300mm²), SO-7 thermal pad layout per datasheet Figure 12, and operation within recommended junction temperature limits (−40°C to +105°C). Exceeding 6W risks thermal shutdown or reduced reliability.
Does AP3983BMTR-G1 require an external current-sense resistor?
Yes - AP3983BMTR-G1 requires an external current-sense resistor connected between the CS pin and source of the internal MOSFET (pin 5/6 D to GND path). The resistor value is calculated using VCS_H = 900mV and desired peak primary current (e.g., 0.47Ω for 1.9A peak). No internal sense resistor is present; the CS pin is a high-impedance comparator input.
How does the CPC pin function in cable compensation?
The CPC pin connects to a 10nF ceramic capacitor to GND, forming a low-pass filter that generates a fixed 0.3V DC offset. This offset is subtracted from the FB voltage during regulation, effectively raising the target output voltage under full load to counteract IR drop in output cables - achieving ±6% total regulation including cable loss.
Can AP3983BMTR-G1 operate without an auxiliary winding?
No - AP3983BMTR-G1 requires an auxiliary winding on the flyback transformer to provide both VCC bias (via D5/C3/R5 network) and feedback voltage (via R6/R7 divider to FB pin). Without it, the IC cannot start up or regulate output voltage/current, as primary-side control depends entirely on reflected auxiliary voltage proportional to output.
AP3983BMTR-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:
- 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):
- 6 W
- Fault Protection:
- Over Temperature, Over Voltage, Short Circuit
- Control Features:
- -
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 7-SO
- Mounting Type:
- Surface Mount
AP3983BMTR-G1 FAQ
1.How can I place an order for AP3983BMTR-G1 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP3983BMTR-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 AP3983BMTR-G1 reliable?
The price and inventory of AP3983BMTR-G1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP3983BMTR-G1 is usually 5 days.
3.What payment methods are accepted for AP3983BMTR-G1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP3983BMTR-G1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP3983BMTR-G1?
AP3983BMTR-G1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP3983BMTR-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 AP3983BMTR-G1?
For technical support, including AP3983BMTR-G1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP3983BMTR-G1 requirements.
6.How does Aetrix verify that AP3983BMTR-G1 is sourced from the original manufacturer or authorized distributors?
All AP3983BMTR-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 AP3983BMTR-G1 meets industry standards.
7.What is the process for return or replacement of AP3983BMTR-G1?
All AP3983BMTR-G1 units undergo pre-shipment inspection (PSI). If there is an issue with AP3983BMTR-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 AP3983BMTR-G1 part is unused and in its original packaging.
Return procedure for AP3983BMTR-G1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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