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Diodes Incorporated AP3304AW6-7
- Part No.:
- AP3304AW6-7
- Manufacturer:
- Diodes Incorporated
- Category:
- AC DC Converters, Offline Switches
- Package:
- SOT-23-6
- Datasheet:
-
AP3304AW6-7.pdf
- Description:
- ACDCPWMSWITCHERSOT26T&R3K
- Quantity:
- Payment:
- Shipping:
Inventory:23,247
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Product details
Overview
AP3304AW6-7 from Diodes Incorporated is a peak-current-mode, multi-mode (Burst/QR/CCM) PWM controller in SOT26 (Type A1) package, designed for offline flyback AC-DC converters. It delivers 23kHz burst-mode operation at light load, QR mode with frequency fold-back up to 100kHz, and fixed 80kHz CCM at heavy load, enabling <0.3mA burst current and 1.5–2.5mA operating current across -40°C to +85°C ambient.
For engineers reviewing the AP3304AW6-7 datasheet, AP3304AW6-7 pinout, AP3304AW6-7 application, or AP3304AW6-7 equivalent, key selection criteria include its valley-detection DEM pin for QR timing, FOCP with 1.2V threshold and 7-cycle debounce, SOVP/SUVP thresholds at 3.2V/0.4V, and integrated OTP at +150°C with +25°C hysteresis - all critical for adapter, STB, and auxiliary power supply design.
Technical Context
The AP3304AW6-7 implements a hybrid control architecture: burst mode triggers below VBURST-ET (0.5V), QR mode uses DEM-pin valley detection with frequency fold-back from 100kHz down to 80kHz, and CCM engages at fixed 80kHz when fold-back limit is reached. Its internal slope compensation eliminates external components for >50% duty cycle stability.
Protection logic integrates cycle-by-cycle OCP via SENSE pin (VCS-MAX = 0.56V typ), secondary-side SOVP/SUVP sampled through DEM pin, VCC OVP at 50V, brown-out detection with 155μA/170μA reference currents, and hiccup-mode OLP triggered at FB ≥3.4V for 64ms. All fault responses are hardware-asserted without microcontroller dependency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Burst Freq | 23kHz fixed - eliminates audible noise and reduces standby power in no-load/low-load conditions |
| QR Max Freq | 100kHz clamp - minimizes switching loss while maintaining quasi-resonant zero-voltage turn-on |
| CCM Freq | 80kHz fixed - optimizes efficiency at high load by avoiding frequency collapse and sustaining duty cycle control |
| VCC UVLO | 14.8–16.8V start / 6–7V shutdown - ensures reliable startup from bulk capacitor and graceful shutdown during line sag |
| FOCP Threshold | 1.2V ±0.2V - enables fast overcurrent response with 7-cycle debounce to prevent false triggering on transients |
| SOVP Threshold | 3.2V ±0.2V - provides precise secondary-side overvoltage protection via DEM-pin sampling of VCC winding voltage |
| OTP Trip | +150°C with +25°C hysteresis - auto-recovering thermal shutdown prevents latch-up and supports continuous reliability testing |
Pinout & Package
SOT26 (Type A1) package: 6-pin, surface-mount, lead-free, RoHS-compliant miniature outline with 0.95mm pitch, 2.9mm × 2.8mm footprint, and 1.15mm height. Thermal resistance θJA = 250°C/W enables operation up to +85°C ambient without heatsink in typical adapter PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 GND | Signal ground reference | Return path for gate driver, control logic, and current sense comparator - must be low-impedance connection to power ground plane |
| 2 FB | Opto-coupler feedback input | Direct interface to secondary-side error amplifier; controls peak current via VFB-to-IPK ratio (IPK = VFB/6RS) |
| 3 DEM | Valley detection & line/sampling input | Detects transformer demagnetization valleys for QR timing; also samples VCC winding for SOVP/SUVP and AC line for BNO/BNI |
| 4 SENSE | Primary current sense input | Accepts voltage from sense resistor; includes 480ns LEB and FOCP comparator with 1.2V threshold for robust short-circuit protection |
| 5 VCC | Supply voltage input | Power rail for internal bias and gate driver; features 50V OVP, UVLO with hysteresis, and 0.6mA fault current draw |
| 6 GATE | High-side MOSFET gate driver output | Delivers 300mA sink / -800mA source; clamped to 11.5V at 50V VCC; 200ns rise / 50ns fall into 1nF load |
Key Features
| Feature | Design Value |
|---|---|
| Multi-mode control | Hardware-automated transition between burst (23kHz), QR (100→80kHz fold-back), and CCM (80kHz fixed) - no firmware or external configuration required |
| Frequency dithering | ±6% spread-spectrum modulation of oscillator - reduces EMI peak emissions without external filtering components |
| Piecewise line compensation | Internal circuitry maintains constant output power limit across 85–265VAC input - eliminates need for external line-sensing resistors |
| Secondary short protection | FOCP with 7-cycle debounce and valley-synchronized sampling - prevents catastrophic failure during secondary rectifier short events |
| Pin fault tolerance | Detects FB open/short, SENSE float, and DEM short-to-ground - disables PWM output immediately to protect power stage |
Applications
| USB-C Notebook Adapter | ATX Auxiliary Power Supply |
|---|---|
|
Use Scenario: 65W USB-C PD adapter with universal AC input (85–265VAC) and regulated 20V output. IC Role / Device Role / Timing Role: Primary-side PWM controller executing burst-mode regulation at no load, QR valley-switching at mid-load, and CCM at full load - directly managing MOSFET gate drive and fault response. Use Value: Achieves <30mW no-load consumption and meets CoC Tier 2 efficiency requirements via adaptive frequency control and built-in slope compensation. |
Use Scenario: +5VSB auxiliary rail in desktop ATX PSUs delivering 2.5A at 5V with standby capability. IC Role / Device Role / Timing Role: Standby-mode flyback controller providing regulated 5V output independent of main converter; manages VCC self-bias and brown-out recovery. Use Value: Enables <0.3mA startup current and hiccup-mode OLP to sustain reliable +5VSB delivery during main rail faults or overload conditions. |
| Set-Top Box Power Supply | Open-Frame Industrial Adapter |
|
Use Scenario: 12V/2A isolated flyback for cable/satellite STB with tight EMI limits and thermal constraints. IC Role / Device Role / Timing Role: Multi-mode controller implementing frequency dithering and valley detection to meet CISPR-22 Class B conducted/radiated EMI without added snubbers. Use Value: Reduces EMI filter component count by 30% versus fixed-frequency controllers while maintaining SOVP/SUVP protection for unattended operation. |
Use Scenario: 24V/3A open-frame adapter for industrial IoT gateways requiring long-term reliability and wide temperature operation. IC Role / Device Role / Timing Role: Primary-side controller with integrated OTP (+150°C trip), VCC OVP, and DEM-based SOVP - eliminating secondary-side sensing components. Use Value: Supports 10-year field life in sealed enclosures via auto-recovering thermal protection and robust pin-fault immunity under vibration or contamination. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-mode flyback controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor NCP1342DR2G | Fixed 65kHz QR-only operation; no burst mode or CCM; requires external slope compensation | Lacks 23kHz burst mode - higher no-load power; no frequency fold-back - reduced mid-load efficiency | Select when cost-sensitive designs prioritize QR simplicity over ultra-low standby and adaptive efficiency |
| Infineon ICE2QS03G | Single-mode QR controller with 50kHz–500kHz variable frequency; no CCM or burst; no integrated SOVP | No secondary-side protection - requires external OVP circuit; no OTP or DEM-based line sensing | Choose for legacy designs where external protection and fixed topology are already implemented |
Compared with NCP1342DR2G and ICE2QS03G, the AP3304AW6-7 uniquely combines burst/QR/CCM modes, DEM-integrated SOVP/SUVP/BNO, and auto-compensated line regulation - enabling single-chip compliance with stringent EU CoC v5 and ENERGY STAR® 8.0 standby requirements.
Availability
AP3304AW6-7 is available at Aetrix Electronics and suitable for USB-C notebook adapters, ATX auxiliary power supplies, and set-top box power supplies requiring stable component supply, long-lifecycle support, and RoHS-compliant manufacturing.
Supply support for AP3304AW6-7 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 IATF 16949-certified facilities.
The AP3304A belongs to Diodes' high-efficiency AC-DC controller product line, engineered specifically for cost-sensitive, low-standby-power offline flyback converters targeting consumer and computing power applications.
FAQ
What is the purpose of the DEM pin in AP3304AW6-7?
The DEM pin serves three simultaneous functions: detecting transformer demagnetization valleys for QR timing, sampling the VCC winding voltage for secondary-side OVP/UVP, and monitoring AC line voltage for brown-in/brown-out detection. Its internal 100mV threshold and sample delay of 1.5µs enable precise, cycle-synchronized protection without external comparators.
How does AP3304AW6-7 achieve ultra-low standby power?
It enters burst mode below VBURST-ET (0.5V), disabling gate drive until FB rises above VBURST-ED (0.6V), reducing average current to 0.3mA. Combined with 1μA startup current and 64ms soft-start, this achieves <30mW no-load consumption in 65W adapters - meeting DOE Level VI and EU CoC Tier 2 requirements.
Can AP3304AW6-7 operate without an opto-coupler?
No - the FB pin requires direct connection to an opto-coupler's phototransistor collector for closed-loop regulation. The IC lacks primary-side sensing or auxiliary winding feedback capability; removing the opto-coupler disables regulation and triggers immediate burst-mode shutdown due to FB voltage collapse.
What protection features are hardware-asserted without delay?
FOCP (1.2V threshold with 7-cycle debounce), VCC OVP (50V clamp), OTP (+150°C trip), and DEM short-to-ground detection all trigger immediate gate shutdown within one switching cycle. These protections use dedicated analog comparators and require no software intervention or external timers.
AP3304AW6-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Isolation:
- Isolated
- Internal Switch(s):
- No
- Voltage - Breakdown:
- -
- Topology:
- Flyback
- Voltage - Start Up:
- 15.8 V
- Voltage - Supply (Vcc/Vdd):
- 10V ~ 50V
- Duty Cycle:
- -
- Frequency - Switching:
- 100kHz
- Power (Watts):
- -
- Fault Protection:
- Current Limiting, Over Load, Over Temperature, Over Voltage, Short Circuit
- Control Features:
- Soft Start
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- SOT-26 (Type A1)
- Mounting Type:
- Surface Mount
AP3304AW6-7 FAQ
1.How can I place an order for AP3304AW6-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP3304AW6-7 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 AP3304AW6-7 reliable?
The price and inventory of AP3304AW6-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP3304AW6-7 is usually 5 days.
3.What payment methods are accepted for AP3304AW6-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP3304AW6-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP3304AW6-7?
AP3304AW6-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP3304AW6-7 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 AP3304AW6-7?
For technical support, including AP3304AW6-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP3304AW6-7 requirements.
6.How does Aetrix verify that AP3304AW6-7 is sourced from the original manufacturer or authorized distributors?
All AP3304AW6-7 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 AP3304AW6-7 meets industry standards.
7.What is the process for return or replacement of AP3304AW6-7?
All AP3304AW6-7 units undergo pre-shipment inspection (PSI). If there is an issue with AP3304AW6-7, 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 AP3304AW6-7 part is unused and in its original packaging.
Return procedure for AP3304AW6-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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