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Diodes Incorporated AP3772AK6TR-G1-2
- Part No.:
- AP3772AK6TR-G1-2
- Manufacturer:
- Diodes Incorporated
- Category:
- AC DC Converters, Offline Switches
- Package:
- SOT-23-6
- Datasheet:
-
AP3772AK6TR-G1-2.pdf
- Description:
- IC OFFLINE SW FLYBACK SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,998
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Product details
Overview
AP3772AK6TR-G1-2 from BCD Semiconductor is a primary-side regulation (PSR) AC/DC controller IC for offline flyback battery chargers and adapters, implementing PFM control in DCM mode with opto-coupler-free CV/CC regulation, 30mW no-load input power, 6% cable compensation, and bipolar transistor (BJT) drive capability. It targets compact, low-cost 5V/1A mobile phone charger designs.
For engineers reviewing the AP3772AK6TR-G1-2 datasheet, AP3772AK6TR-G1-2 pinout, AP3772AK6TR-G1-2 application, or AP3772AK6TR-G1-2 equivalent, key selection criteria include primary-side CV/CC accuracy, no-opto isolation architecture, SOT-23-6 footprint compatibility, cable drop compensation configuration (6%), and integration of line compensation and audio noise suppression.
Technical Context
The AP3772AK6TR-G1-2 implements proprietary Pulse Frequency Modulation (PFM) to regulate output voltage and current directly from the primary winding, eliminating secondary feedback components. Its internal block includes dedicated CV_ctrl and CC_ctrl loops, Tonsec detection, and dynamic response enhancement via AP4340 co-operation.
It integrates fixed 6% cable compensation (per ordering code 'A'), adjustable line compensation (6µA current source), and leading-edge blanking (500ns typ) to suppress false triggering during BJT switching transients. The device operates across -40°C to +85°C with UVLO startup at 15.5V and minimum operating voltage of 3.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Control Method | Pulse Frequency Modulation (PFM) for DCM flyback operation - enables high efficiency at light load and eliminates need for loop compensation |
| No-load Input Power | <30mW - meets stringent global energy efficiency standards (e.g., DOE Level VI, CoC Tier 2) |
| Cable Compensation | Fixed 6% of rated output voltage - corrects voltage drop across USB cables up to ~1.5m length with 28AWG gauge |
| FB Threshold Voltage | 4.04V (typ) - sets precise CV regulation point; tolerance ±20mV ensures ≤±0.5% output voltage deviation |
| CS Threshold Voltage | 525mV (typ) - determines peak primary current limit; enables accurate CC regulation independent of transformer turns ratio |
| OUT Source Current | 30mA (typ) - directly drives base of external NPN BJT without external buffer, reducing BOM count |
| Line Compensation Current | 6µA (typ) - injects proportional current into FB node to counteract line-voltage-induced CC variation |
Pinout & Package
AP3772AK6TR-G1-2 is housed in a RoHS-compliant, green SOT-23-6 package (3.02 × 2.95 × 1.45 mm), optimized for high-density PCB layouts in space-constrained adapter designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | BJT base drive output | Sources up to 30mA to turn on external NPN transistor; sinks fast reverse current during turn-off via 5Ω path to GND |
| 2 (GND) | Power and signal reference ground | Return path for OUT sink current and internal bias; requires low-inductance PCB connection to minimize switching noise |
| 3 (VCC) | IC supply input | Accepts 3.5–30V; requires local low-ESR capacitor (≥1µF) for stable bias under dynamic load transitions |
| 4 (CS) | Primary current sense input | Detects MOSFET/BJT current via sense resistor; incorporates 500ns leading-edge blanking to reject switch-node spikes |
| 5 (CPC) | Cable compensation & audio suppression node | Connects ≥10nF capacitor; voltage linearly tracks load to enable adaptive cable drop correction and reduce audible transformer whine |
| 6 (FB) | Voltage and current feedback input | Monitors reflected output voltage; CV/CC regulation determined by voltage divider ratio and internal 4.04V reference |
Key Features
| Feature | Design Value |
|---|---|
| Primary-side CV/CC regulation | Eliminates opto-coupler, TL431, and secondary-side feedback circuitry - reduces bill-of-materials and improves reliability |
| Built-in 6% cable compensation | Automatically adjusts FB reference to maintain 5V ±50mV at device port despite voltage drop across USB cables |
| Proprietary line compensation | 6µA current source injected into FB node compensates for ±10% AC line variation, maintaining CC accuracy within ±3% |
| Enhanced audio noise suppression | CPC pin capacitance modulates switching frequency under light load to shift energy away from 20–200Hz audible band |
| Integrated protection suite | Includes open-circuit, over-voltage (7–9V FB clamp), short-circuit, and thermal shutdown - enables robust unattended operation |
Applications
| Mobile Phone Charger | USB-C PD Auxiliary Supply |
|---|---|
Use Scenario: 5V/1A wall adapter for smartphones using discrete BJT-based flyback topology. IC Role / Device Role / Timing Role: Primary-side controller executing PFM-based CV/CC regulation and cable compensation without opto-isolation. Use Value: Achieves <30mW no-load consumption and ±5% output regulation across line/load/cable variations per DOE Level VI. | Use Scenario: Standby power supply for USB-C PD controller ICs requiring stable 3.3V/50mA auxiliary rail. IC Role / Device Role / Timing Role: Low-quiescent PSR controller delivering tightly regulated output with minimal component count and footprint. Use Value: Enables always-on functionality while meeting IEC 62368-1 touch-current and no-load power limits. |
| LED Lighting Driver | Smart Home Sensor Power |
Use Scenario: Constant-current driver for single-string white LEDs in battery-powered smart bulbs. IC Role / Device Role / Timing Role: Regulates LED current via primary-sense feedback, leveraging CC_ctrl loop and line compensation. Use Value: Maintains consistent brightness across AC input range (90–264VAC) without secondary sensing components. | Use Scenario: Compact 3.3V/100mA auxiliary supply for Zigbee/BLE modules in battery-less IoT sensors. IC Role / Device Role / Timing Role: High-efficiency PSR controller powering ultra-low-power microcontrollers and RF transceivers. Use Value: Delivers >75% average efficiency at 10% load and supports rapid wake-up from <30mW standby state. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar primary-side regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP3772BK6TR-G1 | 3% cable compensation instead of 6% - lower voltage correction magnitude | Targeted at shorter cables (<0.5m) or higher-gauge wiring where drop is minimal | Select when system-level validation shows 3% correction suffices for end-product USB compliance |
| AP3772CK6TR-G1 | No cable compensation (0%) - FB reference fixed at 4.04V | Used in fixed-output applications with direct-load connection (e.g., PCB-mounted DC-DC stage) | Choose only when output connector is eliminated or cable length is negligible (≤5cm) |
Compared with AP3772BK6TR-G1 and AP3772CK6TR-G1, the AP3772AK6TR-G1-2 provides the highest cable compensation margin, making it optimal for universal-input 5V USB chargers with standard-length cables, whereas the 'B' and 'C' variants trade correction headroom for tighter tolerance in fixed-layout systems.
Availability
AP3772AK6TR-G1-2 is available at Aetrix Electronics and suitable for mobile phone chargers, USB auxiliary supplies, LED lighting drivers, and smart home sensor power systems requiring stable component supply, RoHS compliance, and long-term lifecycle support.
Supply support for AP3772AK6TR-G1-2 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
BCD Semiconductor Manufacturing Limited is a Shanghai-based fabless analog IC designer specializing in high-performance power management solutions for consumer, industrial, and computing markets.
The AP3772 product line delivers cost-optimized, primary-side regulation controllers targeting ultra-low-noise, no-opto AC/DC adapters and battery chargers with strict no-load power and dynamic response requirements.
FAQ
What is the function of the CPC pin on AP3772AK6TR-G1-2?
The CPC pin connects to a ≥10nF capacitor and serves dual functions: its voltage linearly tracks system load to enable adaptive cable voltage drop compensation, and it modulates switching frequency under light load to suppress audible transformer noise. This eliminates need for external audio-noise mitigation circuits.
Can AP3772AK6TR-G1-2 drive a MOSFET directly?
No - AP3772AK6TR-G1-2 is specifically designed to drive NPN bipolar junction transistors (BJTs), sourcing up to 30mA from the OUT pin to support base current. Driving a MOSFET would require external level-shifting or gate-driver circuitry not supported by the IC's output stage architecture.
How does the AP3772AK6TR-G1-2 achieve constant current regulation without secondary sensing?
It uses primary-side current sensing via the CS pin and internal timing-based algorithms that correlate primary conduction time with reflected secondary current. Combined with line compensation current injection into the FB node, it maintains ±3% CC accuracy across 90–264VAC input without opto-coupler or secondary shunt regulator.
Is the 6% cable compensation value programmable or fixed?
The 6% cable compensation is fixed and factory-configured per the 'A' suffix in the part number (AP3772A). It cannot be adjusted externally - alternative versions AP3772B (3%) and AP3772C (0%) are separate orderable SKUs with different internal compensation settings.
AP3772AK6TR-G1-2 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:
- 15.5 V
- Voltage - Supply (Vcc/Vdd):
- 3.5V ~ 30V
- Duty Cycle:
- -
- Frequency - Switching:
- -
- Power (Watts):
- -
- Fault Protection:
- Open Circuit, Over Voltage, Short Circuit
- Control Features:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- SOT-23-6
- Mounting Type:
- Surface Mount
AP3772AK6TR-G1-2 FAQ
1.How can I place an order for AP3772AK6TR-G1-2 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP3772AK6TR-G1-2 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 AP3772AK6TR-G1-2 reliable?
The price and inventory of AP3772AK6TR-G1-2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP3772AK6TR-G1-2 is usually 5 days.
3.What payment methods are accepted for AP3772AK6TR-G1-2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP3772AK6TR-G1-2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP3772AK6TR-G1-2?
AP3772AK6TR-G1-2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP3772AK6TR-G1-2 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 AP3772AK6TR-G1-2?
For technical support, including AP3772AK6TR-G1-2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP3772AK6TR-G1-2 requirements.
6.How does Aetrix verify that AP3772AK6TR-G1-2 is sourced from the original manufacturer or authorized distributors?
All AP3772AK6TR-G1-2 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 AP3772AK6TR-G1-2 meets industry standards.
7.What is the process for return or replacement of AP3772AK6TR-G1-2?
All AP3772AK6TR-G1-2 units undergo pre-shipment inspection (PSI). If there is an issue with AP3772AK6TR-G1-2, 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 AP3772AK6TR-G1-2 part is unused and in its original packaging.
Return procedure for AP3772AK6TR-G1-2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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